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| Legislatures by country |
This is alist of legislatures by country. A "legislature" is the generic name for the nationalparliaments andcongresses that act as a plenary generalassembly ofrepresentatives and that have the power tolegislate. All entities included in thelist of sovereign states are included in this list.
The legislatures are listed with their names in English and the name in the (most-used) native language of the country (or the official name in the second-most used native language in cases where English is themajority "native" language).
| Organisation | Name of house(s) | House level | Term (years) | Voting system | Seats | Population per seat | GDP per seat (USD millions) |
|---|---|---|---|---|---|---|---|
 Andean Community | Andean Parliament | Unicameral | Direct, indirect (varies by country)proportional | 25 | ~ | ~ | |
 African Union | Pan-African Parliament | Unicameral | 5 | Indirect (appointed by 47 of 53 national legislatures) | 265 | 3,974,098 | 14,180 |
 Arab League | Arab Parliament | Unicameral | 80 | ~ | ~ | ||
 Benelux | Benelux Parliament | Unicameral | Indirect | 49 | ~ | ~ | |
 Central American Integration System | Central American Parliament | Unicameral | Varies by country | Direct,proportional | 126 | 426,274 | 2,651 |
 Community of Latin American and Caribbean States | Latin American Parliament | Unicameral | 5 | Direct | 276 | ~ | ~ |
 European Union | European Parliament[1] | Lower | 5 | Open andclosed listproportional representation Single transferable vote (in the Republic of Ireland and Malta) | 705 | 667,761 | 20,983 |
| Council of the European Union[2][note 1] (informally known as the Council of Ministers) | Upper | N/A | Indirect (members of national governments) | 27 | ~ | ~ | |
 Mercosur | Mercosur Parliament | Unicameral | 5 | Direct, indirect (varies by country)proportional | 108 | 1,588,889 | 16,228 |
| UN member or observer state | Overall name of legislature | Name of house(s) | House level | Term (years) | Electoral system | Seats | Population per seat |
|---|---|---|---|---|---|---|---|
 Afghanistan | Leadership Council of Afghanistan (رهبری شُورَىٰ,Rahbarī Shūrā)[3] | Unicameral | No fixed term | Appointment by thesupreme leader | Aprx. 30[4] | 1,340,608[a] | |
 Albania | Parliament of Albania (Kuvendi i Shqipërisë) | Unicameral | 4 | Closed listproportional representation with theD'Hondt method by county with a 3% threshold | 140 | 20,226 | |
 Algeria | Parliament of Algeria (البرلمان الجزائري,Barlaman al-Jazā'ir /Agraw Azzayri /Parlement algérien) | People's National Assembly (المجلس الشعبي الوطني,al-Majlis al-Sha'abi al-Watani /Asqamu Aɣerfan Aɣelnaw /Assemblée populaire nationale, APN) | Lower | 5 | Open listproportional representation with thelargest remainder method by province | 407 | 80,303 |
| Council of the Nation (مجلس الأمة,Majlis al-Ummah /Conseil de la nation) | Upper | 6 | Elected by popular wilaya assemblies and communal people's assemblies, and appointed by the President | 174 | 257,638 | ||
 Andorra | General Council of Andorra (Consell General d'Andorra) | Unicameral | 4 | Parallel voting:Closed listproportional representation with thelargest remainder method nationwide andblock vote by parish | 28 | 2,789 | |
 Angola | National Assembly (Assembleia Nacional) | Unicameral | 4 | Closed listproportional representation with theD'Hondt method nationwide and by province | 220 | 84,081 | |
 Antigua and Barbuda | Parliament of Antigua and Barbuda[note 2] | House of Representatives | Lower | 5 | First-past-the-post | 17 | 4,305 |
| Senate | Upper | 5 | Appointed by the governor-general, representing the monarch, on the advice of the prime minister and leader of the Opposition | 17 | 4,811 | ||
 Argentina | National Congress of Argentina (Congreso de la Nación Argentina) | Chamber of Deputies of the Nation (Cámara de Diputados de la Nación) | Lower | 4 | Closed listproportional representation with theD'Hondt method by province with a 3% threshold | 257 | 156,097 |
| Honorable Senate of the Nation (Honorable Senado de la Nación Argentina) | Upper | 6 | Partial block voting by province | 72 | 557,181 | ||
 Armenia | National Assembly of Armenia (Հայաստանի Հանրապետության Ազգային ժողով,Hayastani Hanrapetyut'yan Azgayin zhoghov / Abbreviated:Ազգային ժողով, ԱԺ,Azgayin Zhoghov, AZh) Informal: Parliament of Armenia (խորհրդարան,Khorhrdaran) | Unicameral | 5 | Closed-listproportional representation in a nationwide constituency andopen-list proportional in district constituencies, with a 5% or top-3 national threshold (or 7% for alliances)[b][5] | 105 | 24,902 | |
 Australia | Parliament of Australia[note 2] | House of Representatives | Lower | 3 | Instant-runoff voting | 150 | 162,914 |
| Senate | Upper | 6 (for states) 3 (for territories) unless elections are called earlier | Single transferable vote by state/territory, usually, 6 seats from each state and all territory seats are up for election (40 total) except in the case of adouble dissolution, when all seats are up for election | 76 | 323,684 | ||
 Austria | Austrian Parliament (Österreichisches Parlament) | National Council (Nationalrat) | Lower | 5 | Open listproportional representation with theD'Hondt method in constituencies with a 4% threshold | 183 | 43,895 |
| Federal Council (Bundesrat) | Upper | 5 and 6 | Elected by state legislatures | 60 | 129,563 | ||
 Azerbaijan | National Assembly (Milli Məclis) | Unicameral | 5 | First-past-the-post | 125 | 73,320 | |
 Bahamas, The | Parliament of the Bahamas[note 2] | House of Assembly | Lower | 5 | First-past-the-post | 39 | 9,326 |
| Senate | Upper | 5 | Appointed by the governor-general, representing the monarch, on the advice of the prime minister and leader of the Opposition | 16 | 22,103 | ||
 Bahrain | National Assembly (المجلس الوطني البحريني,Al-majlis al-wataniu al-bahrayniu) | Council of Representatives (مجلس النواب,Majlis an-nuwab) | Lower | 4 | Two-round system | 40 | 30,864 |
| Consultative Council (مجلس الشورى,Majlis al-shura) | Upper | 4 | Appointed by the king | 40 | 30,864 | ||
 Bangladesh | National Parliament (জাতীয় সংসদ,Jatiya Sangsad) | Unicameral | 5 | First-past-the-post | 350 | 466,909 | |
 Barbados | Parliament of Barbados[note 2] | House of Assembly | Lower | 5 | First-past-the-post | 30 | 9,486 |
| Senate | Upper | 5 | Appointed by the President on the advice of the prime minister and leader of the Opposition | 21 | 13,551 | ||
 Belarus | National Assembly of the Republic of Belarus (Нацыянальны сход Рэспублікі Беларусь,Nacyjanalny schod Respubliki Bielaruś /Национальное собрание Республики Беларусь,Natsionalnoye sobran'ye Respubliki Belarus) | House of Representatives (Палата прадстаўнікоў,Palata pradstaŭnikoŭ /Палата представителей,Palata predstavitelej) | Lower | 4 | Two-round system | 110 | 85,997 |
| Council of the Republic (Савет Рэспублікі,Saviet Respubliki /Совет Республики) | Upper | 4 | Elected by regional councils, and appointed by the President | 64 | 147,773 | ||
 Belgium | Federal Parliament (Federaal Parlement /Parlement fédéral /Föderales Parlament) | Chamber of Representatives (Kamer van Volksvertegenwoordigers /Chambre des Représentants /Abgeordnetenkammer) | Lower | 5 | Open listproportional representation with theD'Hondt method by province with a 5% threshold | 150 | 74,000 |
| Senate (Senaat /Sénat /Senat) | Upper | 5 | Elected by community and regional parliaments | 60 | 185,000 | ||
 Belize | National Assembly | House of Representatives | Lower | 5 | First-past-the-post | 31 | 10,748 |
| Senate | Upper | 5 | Appointed by the governor-general representing the monarch, on the advice of the prime minister and leader of the Opposition | 12 | 27,766 | ||
 Benin | National Assembly (Assemblée nationale) | Unicameral | 4 | Proportional representation with thelargest remainder method in constituencies | 83 | 115,648 | |
 Bhutan | Parliament of Bhutan[note 3] (རྒྱལ་ཡོངས་ཚོགས་ཁང་,Gyelyong Tshokhang | National Assembly (རྒྱལ་ཡོངས་ཚོགས་འདུ།,Gyelyong Tshogdu) | Lower | 5 | First-past-the-post | 47 | 15,072 |
| National Council (རྒྱལ་ཡོངས་ཚོགས་སྡེ།,Gyelyong Tshogde) | Upper | 4 | First-past-the-post, and appointed by the king | 25 | 28,337 | ||
 Bolivia | Plurinational Legislative Assembly (Asamblea Legislativa Plurinacional) | Chamber of Deputies (Cámara de Diputados) | Lower | 5 | Closed listmixed-member proportional representation:Proportional representation with theD'Hondt method by department andfirst-past-the-post | 130 | 83,905 |
| Chamber of Senators (Cámara de Senadores) | Upper | 5 | Closed listproportional representation with theD'Hondt method by department | 36 | 302,993 | ||
 Bosnia and Herzegovina | Parliamentary Assembly (Parlamentarna skupština /Парламентарна скупштина) | House of Representatives (Predstavnički dom/Zastupnički dom /Представнички дом) | Lower | 4 | Open listproportional representation with thelargest remainder method in constituencies | 42 | 91,422 |
| House of Peoples (Dom naroda /Дом народa) | Upper | 4 | Serbs elected by theNational Assembly ofRepublika Srpska, and Bosniaks and Croats elected by theHouse of Peoples of theFederation of Bosnia and Herzegovina | 15 | 255,982 | ||
 Botswana | Parliament of Botswana | National Assembly (Palamente ya Botswana) | Unicameral | 5 | First-past-the-post, and appointed by the President | 69 | 32,211 |
 Brazil | National Congress (Congresso Nacional) | Chamber of Deputies (Câmara dos Deputados) | Lower | 4 | Open listproportional representation with theD'Hondt method by state | 513 | 371,798 |
| Federal Senate (Senado Federal) | Upper | 8 | Partial block voting by state | 81 | 2,354,724 | ||
 Brunei | Legislative Council (Majlis Mesyuarat Negara) | Unicameral | no timeframe | Appointed by the Sultan | 36 | 11,355 | |
 Bulgaria | National Assembly (Народно събрание,Narodno sabranie) | Unicameral | 4 | Closed listproportional representation with thelargest remainder method by constituency with a 4% threshold | 240 | 30,685 | |
 Burkina Faso | National Assembly (Assemblée nationale) | Unicameral | 5 | Proportional representation with theD'Hondt method nationwide and in constituencies | 127 | 126,281 | |
 Burundi | Parliament (Parlement) | National Assembly (Assemblée nationale) | Lower | 5 | Closed listproportional representation with theD'Hondt method in constituencies with a 2% threshold | 121 | 74,570 |
| Senate (Sénat) | Upper | 5 | Elected by the communal councils | 43 | 179,577 | ||
 Cambodia | Parliament (សភាតំណាងរាស្ត្រ,Sâphéa Tâmnang Réastr) | National Assembly (រដ្ឋសភា,Rôdthsâphéa) | Lower | 5 | Closed listproportional representation with theD'Hondt method by province | 123 | 108,852 |
| Senate (ព្រឹទ្ធសភា,Prœ̆tthsâphéa) | Upper | 6[6] | Appointed by the monarch, elected by the National Assembly and commune councils | 61 | 219,490 | ||
 Cameroon | Parliament (Parlement) | National Assembly (Assemblée nationale) | Lower | 5 | First-past-the-post andBlock vote: If no list obtains an absolute majority, the one with the highest number of votes is allocated half of the seats; the remainder is allocated to the other best-placed lists through proportional representation | 180 | 97,021 |
| Senate (Sénat) | Upper | 5 | Elected by municipal councils, and appointed by the president | 100 | 174,638 | ||
 Canada | Parliament (Parlement)[note 2] | House of Commons (Chambre des communes) | Lower | 4 years, unless elections are called earlier | First-past-the-post voting | 338 | 104,571 |
| Senate (Sénat) | Upper | Until age 75, or resignation. | Appointed by the governor general, representing the monarch, on the advice of the prime minister | 105 | 318,825 | ||
 Cape Verde | National Assembly (Asembleia Nacional) | Unicameral | 5 | Closed listproportional representation with theD'Hondt method in constituencies | 72 | 4,990 | |
 Central African Republic | National Assembly (Assemblée nationale) | Unicameral | 5 | Two-round system | 131 | 38,951 | |
 Chad | National Assembly (Assemblée nationale /الجمعية الوطنية,aljameiat alwatania) | Unicameral | 4 | Block voting: If no list obtains an absolute majority, the seats are allocated throughproportional representation | 188 | 66,640 | |
 Chile | National Congress (Congreso Nacional) | Chamber of Deputies (Cámara de Diputados) | Lower | 4 | Open listproportional representation with theD'Hondt method | 155 | 145,021 |
| Senate of the Republic (Senado de la República) | Upper | 8 | Open listproportional representation with theD'Hondt method | 38 | 457,963 | ||
 China | National People's Congress (全国人民代表大会,Quánguó Rénmín Dàibiǎo Dàhuì)[note 4] | Unicameral | 5 | Elected by municipal, regional and provincial congresses, and People's Liberation Army | 2,980 | 448,518 | |
 Colombia | Congress (Congreso) | Chamber of Representatives (Cámara de Representantes) | Lower | 4 | Open orclosed listproportional representation (depending on the political party) with theD'Hondt method by state | 166 | 279,556 |
| Senate (Senado) | Upper | 4 | Open orclosed listproportional representation (depending on the political party) with theD'Hondt method nationwide with a 3% threshold | 102 | 454,964 | ||
 Comoros | Assembly of the Union (Assemblée de l'Union) | Unicameral | 5 | Two-round system, and elected by the local assemblies | 33 | 24,181 | |
 Congo, Democratic Republic of the | Parliament (Parlement) | National Assembly (Assemblée nationale) | Lower | 5 | Coexistence:Open listproportional representation with thelargest remainder method in multi-member constituencies andfirst-past-the-post voting in single-member constituencies | 500 | 143,425 |
| Senate (Sénat) | Upper | 5 | Elected by the provincial assemblies | 108 | 664,008 | ||
 Congo, Republic of the | Parliament (Parlement) | National Assembly (Assemblée nationale) | Lower | 5 | Two-round system | 151 | 28,537 |
| Senate (Sénat) | Upper | 5 | Elected by district, local, and regional councils | 52 | 83,966 | ||
 Costa Rica | Legislative Assembly (Asamblea Legislativa) | Unicameral | 4 | Closed listproportional representation with thelargest remainder method by province | 57 | 75,468 | |
 Croatia | Croatian Assembly[note 3] (Hrvatski sabor) | Unicameral | 4 | Open listproportional representation with theD'Hondt method in constituencies with a 5% threshold | 151 | 28,414 | |
 Cuba | National Assembly of People's Power (Asamblea Nacional del Poder Popular) | Unicameral | 5 | Popular vote and approval by special candidacy commissions | 605 | 18,308 | |
 Cyprus | House of Representatives (Βουλή των Αντιπροσώπων,Vouli Antiprosópon /Temsilciler Meclisi) | Unicameral | 5 | Open listproportional representation with thelargest remainder method by constituency | 56 | 18,632 | |
 Czech Republic | Parliament of the Czech Republic (Parlament České republiky) | Chamber of Deputies (Poslanecká sněmovna) | Lower | 4 | Open listproportional representation with theD'Hondt method by region with a 5% threshold | 200 | 52,811 |
| Senate (Senát) | Upper | 6 | Two-round system (staggered elections) | 81 | 130,397 | ||
 Denmark | People's Assembly[note 3] (Folketinget) | Unicameral | 4 | Open listproportional representation with theD'Hondt method in constituencies with a 2% threshold including the Faroe Islands and Greenland seats | 179 | 30,969 | |
 Djibouti | National Assembly (Assemblée nationale /الجمعية الوطنية,aljameiat alwatania) | Unicameral | 5 | Block vote andclosed listproportional representation by constituencies: The list obtaining an absolute or relative majority of votes is allocated 80% of the seats; the remainder is allocated to the other best-placed lists which obtained at least 10% of the valid votes through proportional representation; if no other list obtains 10% of the valid votes, the remaining seats will be allocated to the party which won the majority or relative majority of the valid votes | 65 | 12,587 | |
 Dominica | House of Assembly | Unicameral | 5 | First-past-the-post voting, and appointed by the President | 32 | 3,394 | |
 Dominican Republic | National Congress (Congreso Nacional) | Chamber of Deputies (Cámara de Diputados) | Lower | 4 | Open listproportional representation with theD'Hondt method by province and nationwide with a 1% threshold for the nationwide seats | 190 | 51,520 |
| Senate (Senado) | Upper | 4 | First-past-the-post voting | 32 | 293,088 | ||
 East Timor | National Parliament (Parlamentu Nasionál /Parlamento Nacional) | Unicameral | 5 | Closed listproportional representation with theD'Hondt method nationwide with a 3% threshold | 65 | 16,408 | |
 Ecuador | National Assembly (Asamblea Nacional) | Unicameral | 4 | Parallel voting:Closed listproportional representation in a nationwide constituency andfirst-past-the-post voting | 137 | 116,802 | |
 Egypt | Parliament (برلمان,Barlaman) | Senate (مجلس الشيوخ,Majlis Alshuyukh) | Upper | 5 | 300 | 375,722 | |
| House of Representatives (مجلس النواب,Majilis Al-Nuwab) | Lower | 5 | Parallel voting:First-past-the-post voting,block vote, and appointed by the President | 596 | 150,983 | ||
 El Salvador | Legislative Assembly (Asamblea Legislativa) | Unicameral | 3 | Open listproportional representation with theD'Hondt method by department | 60 | 95,735 | |
 Equatorial Guinea | Parliament (Parlamento /Parlement /Parlamento) | Chamber of Deputies (Cámara de los Diputados /Chambre des députés /Câmara dos Deputados) | Lower | 5 | Closed listproportional representation in constituencies with a 10% threshold | 100 | 16,220 |
| Senate (Senado /Sénat /Senado) | Upper | Closed listproportional representation with a 10% threshold, and appointed by the President | 70 | 23,171 | |||
 Eritrea | National Assembly (ሃገራዊ ባይቶ,Hagerawi Baito) | Unicameral | 5 | Popular vote | 104 | 50,878 | |
 Estonia | State Assembly[note 3] (Riigikogu) | Unicameral | 4 | Open listproportional representation with theD'Hondt method in constituencies with a 5% threshold | 101 | 12,814 | |
 Eswatini | Parliament (Liblanda) | House of Assembly (Indlu yeMalunga) | Lower | 5 | majority | 55 | 22,181 |
| Senate (Indlu yeTimphunga) | Upper | 5 | Appointed by theKing | 30 | 40,666 | ||
 Ethiopia | Parliament (የፌዴራል ፓርላማ ምክር ቤት,Ye-Fēdēralawī Parilama Mikir Bēt) | House of Peoples' Representatives (የሕዝብ ተወካዮች ምክር ቤት,Ye-Hizib Tewekayochi Mikir Bē) | Lower | 5 | First-past-the-post voting | 547 | 135,134 |
| House of Federation (የፌዴሬሽን ምክር ቤት,Ye-Fēdērēshin Mikir Bēt) | Upper | 5 | Elected by State Councils | 112 | 659,986 | ||
 Federated States of Micronesia | Congress | Unicameral | 4 | First-past-the-post voting | 14 | 7,642 | |
 Fiji | Parliament | Unicameral | 4 | Open listproportional representation with theD'Hondt method nationwide with a 5% threshold | 50 | 16,745 | |
 Finland | Parliament (Eduskunta /Riksdagen) | Unicameral | 4 | Open listproportional representation with theD'Hondt method in constituencies, andfirst-past-the-post for Åland's lone seat | 200 | 25,900 | |
 France | Parliament (Parlement) | National Assembly (Assemblée nationale) | Lower | 5 | Two-round system | 577 | 113,258 |
| Senate (Sénat) | Upper | 6 | Elected indirectly by officials including regional councilors, department councilors, mayors, city councilors, and members of the National Assembly; two-round or proportional by department depending on the number of seats. | 348 | 187,787 | ||
 Gabon | Parliament (Parlement) | National Assembly (Assemblée nationale) | Lower | 5 | First-past-the-post voting, and appointed by the President | 121 | 12,190 |
| Senate (Sénat) | Upper | 6 | Indirectly elected by local and départemental councillors | 102 | 14,460 | ||
 Gambia | National Assembly | Unicameral | 5 | First-past-the-post voting, and appointed by the President | 58 | 25,673 | |
 Georgia | Parliament of Georgia (საქართველოს პარლამენტი,Sak'art'velos Parlamenti) | Unicameral | 4 | Parallel voting:Closed listproportional representation in a nationwide constituency with a 5% threshold, andfirst-past-the-post | 150 | 29,794 | |
 Germany | Federal Diet[note 3] (Bundestag) | Lower | 4 | Closed listmixed-member proportional representation with theSainte-Laguë method by state with a 5% threshold, andfirst-past-the-post | 736 | 113,031 | |
| Federal Council[note 3] (Bundesrat) | Upper | Dependent on individual state elections | Delegated from state governments | 69 | 1,185,501 | ||
 Ghana | Parliament | Unicameral | 4 | First-past-the-post voting | 275 | 106,286 | |
 Greece | Hellenic Parliament[note 3] (Βουλή των Ελλήνων,Vouli ton Ellinon) | Unicameral | 4 | Open listreinforced proportional representation with theD'Hondt method in constituencies with a 3% threshold | 300 | 35,958 | |
 Grenada | Parliament | House of Representatives | Lower | 5 | First-past-the-post voting | 15 | 7,333 |
| Senate | Upper | 5 | Appointed by the government and by the leader of opposition | 13 | 8,461 | ||
 Guatemala | Congress of the Republic (Congreso de la República) | Unicameral | 4 | proportionalclosed list | 160 | 80,557 | |
 Guinea | National Assembly (Assemblée nationale) | Unicameral | 5 | proportionalclosed list | 114 | 88,227 | |
 Guinea-Bissau | National People's Assembly (Assembleia Nacional Popular) | Unicameral | 4 | proportionalclosed list | 100 | 13,454 | |
 Guyana | National Assembly | Unicameral | 5 | popular vote and appointed by the President | 65 | 11,583 | |
 Haiti | National Assembly (Assemblée nationale /Asanble Nasyonal) | Chamber of Deputies (Chambre des députés /Chanm Depite) | Lower | 4 | proportional | 119 | 98,181 |
| Senate (Sénat /Sena) | Upper | 6 | 30 | 323,997 | |||
 Honduras | National Congress (Congreso Nacional) | Unicameral | 4 | proportionalopen list | 128 | 58,823 | |
 Hungary | National Assembly (Országgyűlés) | Unicameral | 4 | proportionalopen list andScorporo | 199 | 25,860 | |
 Iceland | Assembly of All[note 3] (Alþingi) | Unicameral | 4 | proportional | 63 | 5,080 | |
 India | Parliament (संसद,Sansad) | House of the People[note 3] (लोक सभा,Lok Sabha) | Lower | 5 | First-past-the-post | 543 | 2,192,379 |
| Council of States[note 3] (राज्य सभा,Rajya Sabha) | Upper | 6 | Single transferable vote (233 members are elected by thelegislative assemblies of the States/Union territories, 12 members are nominated by the President) | 245 | 4,847,900 | ||
 Indonesia | People's Consultative Assembly (Majelis Permusyawaratan Rakyat) | People's Representative Council (Dewan Perwakilan Rakyat) | Lower | 5 | proportionalopen list | 575 | 467,101 |
| Regional Representative Council (Dewan Perwakilan Daerah) | Upper | 5 | Single non-transferable vote | 136 | 1,974,875 | ||
 Iran | Islamic Consultative Assembly[note 3] (مجلس شورای اسلامی,Majles-e Showrā-ye Eslāmī) | Unicameral | 4 | popular vote | 290 | 259,136 | |
 Iraq | Council of Representatives of Iraq[note 3] (مجلس النواب العراقي,Majlis Al-Niwab Al-Iraqi /ئهنجومهنی نوێنهران,Enjumen-e Nûnerên) | Unicameral | 4 | proportionalopen list | 329 | 95,782 | |
 Ireland | Parliament[note 3] (Oireachtas) | President of Ireland (Uachtarán) | President-in-Parliament | 7 | Instant-runoff voting | N/A | N/A |
| House of Representatives of Ireland (Dáil Éireann)[note 3] | Lower | 5 | Proportional Representation Single Transferable Vote | 160 | 27,640 | ||
| Senate of Ireland[note 3] (Seanad Éireann) | Upper | 5 | Appointed by the prime minister, elected by local and national elected representatives, and elected by graduates of universities | 60 | 76,470 | ||
 Israel | Assembly[note 3] (כנסת,Knesset) | Unicameral | 4 | proportionalclosed list | 120 | 61,768 | |
 Italy | Parliament (Parlamento) | Chamber of Deputies (Camera dei Deputati) | Lower | 5 | parallel voting (245 seats by proportional representation, 147 seats by first past the post and 8 abroad by proportional representation) | 400 | 152,738 |
| Senate of the Republic (Senato della Repubblica) | Upper | 5 | parallel voting (122 seats by proportional representation, 74 seats by first past the post and 4 abroad by proportional representation), 5 members appointed by the President and former Presidents by right | 200 | 296,580 | ||
 Ivory Coast | Parliament (Parlement) | National Assembly (Assemblée nationale) | Lower | 5 | majority | 255 | 294,529 |
| Senate (Sénat) | Upper | 5 | Elected by district and provincial councils, and appointed by the President | 120 | 197,837 | ||
 Jamaica | Parliament[note 2] | House of Representatives | Lower | 5 | First-past-the-post voting | 63 | 45,860 |
| Senate | Upper | 5 | Appointed by the governor-general | 21 | 137,580 | ||
 Japan | Diet (国会,Kokkai) | House of Representatives (衆議院,shūgiin) | Lower | 4 | proportional andFirst-past-the-post voting | 465 | 270,817 |
| House of Councillors (参議院,Sangiin) | Upper | 6 | proportional andSingle non-transferable vote | 248 | 514,000 | ||
 Jordan | Parliament (مجلس الأمة,Majlis al-Umma) | House of Representatives (مجلس النواب,Majlis al-Nuwaab) | Lower | 4 | Single non-transferable vote | 130 | 46,760 |
| Senate (مجلس الأعيان,Majlis al-Aayan) | Upper | 6 | Appointed by the monarch | 75 | 93,520 | ||
 Kazakhstan | Parliament (Парламент,Parlament) | Assembly[note 3] (Мәжіліс,Mäjilis) | Lower | 5 | 107 | 207,854 | |
| Senate (Сенат,Senat) | Upper | 6 | Appointed by the President and elected by local assemblies | 49 | 340,527 | ||
 Kenya | Parliament (Bunge) | National Assembly (Bunge la Taifa) | Lower | 5 | parallel | 349 | 126,182 |
| Senate (Seneti) | Upper | 5 | Popular vote and appointed by the President | 67 | 657,278 | ||
 Kiribati | House of Assembly (Maneaba ni Maungatabu) | Unicameral | 4 | popular vote and appointed by Rabi Council of Leaders | 46 | 2,239 | |
 Korea, North | Supreme People's Assembly (최고인민회의 /最高人民會議,Ch'oe-go In-min Hoe-ŭi) | Unicameral | 5 | popular vote | 687 | 36,390 | |
 Korea, South | National Assembly (국회 /國會,Gukhoe) | Unicameral | 4 | majority andproportional | 300 | 166,691 | |
 Kuwait | National Assembly (مجلس الأمة,Majlis al-Umma) | Unicameral | 4 | popular vote and appointed by the emir | 50 | 71,328 | |
 Kyrgyzstan | Supreme Council (Жогорку Кеңеш,Joğorku Keñeş) | Unicameral | 5 | popular vote | 90 | 44,690 | |
 Laos | National Assembly (ສະພາແຫ່ງຊາດ,Sapha Aehngsad) | Unicameral | 5 | one-party stateclosed list | 115 | 48,148 | |
 Latvia | Parliament[note 3] (Saeima) | Unicameral | 4 | proportionalclosed list | 100 | 20,703 | |
 Lebanon | Parliament (مجلس النواب,Majlis an-Nuwwab /Chambre des Députés) Also: National Assembly (Assemblée nationale) | Unicameral | 4 | proportional party list | 128 | 33,000 | |
 Lesotho | Parliament (Palamente ea Lesotho) | National Assembly (Lekhotleng la Sechaba) | Lower | 5 | popular vote andproportional | 120 | 16,927 |
| Senate (Ntlong ea Mahosana) | Upper | 5 | appointed by principal chiefs and by the ruling party | 33 | 61,556 | ||
 Liberia | Legislature | House of Representatives | Lower | 6 | majority | 73 | 47,624 |
| Senate | Upper | 9 | majority | 30 | 115,896 | ||
 Libya | House of Representatives (مجلس النواب,Majlis an-Nuwwab) | Unicameral | Parallel voting:First-past-the-post,single non-transferable vote, andproportional representation | 200 | 28,353 | ||
 Liechtenstein | Diet[note 3] (Landtag) | Unicameral | 4 | proportionalclosed list | 25 | 1,451 | |
 Lithuania | Parliament[note 3] (Seimas) | Unicameral | 4 | proportional | 141 | 21,658 | |
 Luxembourg | Chamber of Deputies (D'Chamber /Chambre des députés /Abgeordnetenkammer) | Unicameral | 5 | Open listproportional representation, allocated by theD'Hondt method infour constituencies | 60 | 11,013 | |
 Madagascar | Parliament (Palemanta /Parlement) | National Assembly (Antenimieram-Pirenena /Assemblée nationale) | Lower | 5 | Parallel voting | 160 | 137,078 |
| Senate (Antenimierandoholona /Sénat) | Upper | 5 | 33 | 664,430 | |||
 Malawi | National Assembly | Unicameral | 5 | First-past-the-post voting | 193 | 76,809 | |
 Malaysia | Parliament (Parlimen) | House of Representatives[note 5] (Dewan Rakyat) | Lower | 5 | First-past-the-post voting | 222 | 127,631 |
| Senate[note 6] (Dewan Negara) | Upper | 3 | 26 appointed by theState Legislative Assemblies, 2 for each state and 44 appointed by theYang di-Pertuan Agong, of which 4 are for theFederal Territories. | 70 | 404,773 | ||
 Maldives | People's Assembly[note 3] (ރައްޔިތުންގެ މަޖިލިސް,Rayyithunge Majilis) | Unicameral | 5 | First-past-the-post voting | 85 | 4,266 | |
 Mali | National Assembly (Assemblée nationale) | Unicameral | 4 | 147 elected in single or multi-member constituencies, using a runoff system. 13 elected by overseas Malians. | 160 | 90,732 | |
 Malta | Parliament (Il-Parlament) | President of Malta | President-in-Parliament | 5 | Appointed by the House of Representatives | N/A | N/A |
| House of Representatives (Kamra tad-Deputati) | Unicameral | 5 | Single transferable vote | 69 | 5,950 | ||
 Marshall Islands | Legislature (Nitijeļā) | Unicameral | 4 | Single and multi-member constituencies | 33 | 2,060 | |
 Mauritania | Parliament (البرلمان,al-Barlamān /Parlement) | National Assembly (الجمعية الوطنية,al-Jamʻīyah al-Waṭanīyah /𞤀𞤧𞤢𞥄𞤥𞤦𞤫𞤤𞤫 𞤲𞤺𞤫𞤲𞤲𞤣𞤭,Asaambele ngenndi /Assemblée nationale) | Unicameral | 5 | Parallel voting: 50% seats elected viaclosed listproportional representation with thelargest remainder method across three national lists and some urban districts, 50% elected via ageneral ticket with atwo-round system byelectoral district | 176 | N/A |
 Mauritius | National Assembly (Assemblée nationale) | Unicameral | 5 | 65 | 17,614 | ||
 Mexico | Congress of the Union (Congreso de la Unión) | Chamber of Deputies (Cámara de Diputados) | Lower | 3 | Parallel voting:Largest remainder method (Hare quota) (200 seats) / FPTP (300 seats) | 500 | 227,821 |
| Chamber of Senators (Cámara de Senadores) | Upper | 6 | Parallel voting:Largest remainder method (Hare quota) | 128 | 889,926 | ||
 Moldova | Parliament (Parlamentul) | Unicameral | 4 | Closed listproportional representation | 101 | 33,498 | |
 Monaco | National Council (Conseil National) | Unicameral | 5 | Panachage underparty-list proportional representation (16), party-list proportional representation (8) | 24 | 1,473 | |
 Mongolia | State Great Assembly[note 7] (Улсын Их Хурал,Ulsyn Ikh Khural) | Unicameral | 4 | Plurality-at-large voting | 126 | 36,245 | |
 Montenegro | Assembly (Skupština,Скупштина) | Unicameral | 4 | Closed listproportional representation using theD'Hondt method in a single nationwide constituency with a 3%electoral threshold with lower thresholds for minority groups under certain circumstances | 81 | 7,719 | |
 Morocco | Parliament (البرلمان المغربي,Barlaman almaghrib /ⴰⴱⵕⵍⴰⵎⴰⵏ ⴰⵎⵖⵔⵉⴱⵉ /Parlement) | House of Representatives (مجلس النواب,Majlis al-Nuwab /ⴰⴳⵔⴰⵡ ⵉⵎⴰⵔⴰⵢⴻⵏ,Asqqim n Imura /Chambre des représentants) | Lower | 5 | Mixed member majoritarian:Single non-transferable vote for 305 seats, 60 seats reserved for women and 30 seats reserved for young people under 40 byproportional representation | 395 | 100,444 |
| House of Councillors (مجلس المستشارين,Majlis al-Mustasharin /ⴰⵙⵇⵇⵉⵎ ⵏ ⵉⵏⵙⴼⴰⵡⵏ,Asqqim n Insfawn /Chambre des conseillers) | Upper | 6 | Indirect election: 72 members are elected at the Kingdom's regional level, 20 in each region by a single electoral college made up of all those in the relevant region that have been elected to specific professional associations, 8 in each region by an electoral college made up of those elected from the most representative employers' professional organizations, 20 by a nationwide electoral college made up of employees | 270 | 120,905 | ||
 Mozambique | Assembly of the Republic (Assembleia da República) | Unicameral | 5 | proportionalparty list | 250 | 85,588 | |
 Myanmar (Burma) | Assembly of the Union (ပြည်ထောင်စုလွှတ်တော်,Pyidaungsu Hluttaw) | House of Representatives (ပြည်သူ့လွှတ်တော်,Pyithu Hluttaw) | Lower | 5 | popular vote and appointed by the military | 440 | 137,000 |
| House of Nationalities (အမျိုးသားလွှတ်တော်,Amyotha Hluttaw) | Upper | 5 | popular vote and appointed by the military | 224 | 269,107 | ||
 Namibia | Parliament | National Assembly | Lower | 5 | Closed listproportional representation and appointments by thePresident | 104 | 26,923 |
| National Council | Upper | 6 | Indirect election by Regional Councils | 26 | 80,769 | ||
 Nauru | Parliament (Naoero parliament) | Unicameral | 3 | Dowdall system | 19 | 521 | |
 Nepal | Federal Parliament (संघीय संसद,Sanghiya Sansad) | House of Representatives (प्रतिनिधि सभा,Pratinidi Sabha) | Lower | 5 | Mixed member majoritarian (165 members elected throughFirst-past-the-post voting and 110 elected throughproportional representation voting method) | 275 | 105,392 |
| National Assembly (राष्ट्रिय सभा,Rastriya Sabha) | Upper | 6 | Indirectsingle transferable vote and 3 members appointed by the President | 59 | 491,233 | ||
 Netherlands | States General (Staten-Generaal) | House of Representatives (Tweede Kamer,lit. 'Second Chamber') | Lower | 4 | Party-list proportional representation | 150 | 111,533 |
| Senate (Eerste Kamer,lit. 'First Chamber') | Upper | 4 | Indirect party-list proportional (by members of thestates-provincial and theCaribbeanElectoral colleges for the Senate) | 75 | 223,066 | ||
 New Zealand | Parliament (Pāremata)[note 2] | House of Representatives (Whare o ngā Māngai) | Unicameral | 3 | Closed listmixed-member proportional representation with a 5% threshold | 120 | 33,566 |
 Nicaragua | National Assembly (Asamblea Nacional) | Unicameral | 5 | Party-list proportional representation | 90 | 64,034 | |
 Niger | National Assembly (Assemblée nationale) | Unicameral | 5 | Proportional representation | 171 | 139,210 | |
 Nigeria | National Assembly | House of Representatives | Lower | 4 | 360 | 388,898 | |
| Senate | Upper | 4 | 109 | 1,284,436 | |||
 North Macedonia | Assembly (Собрание,Sobranie) | Unicameral | 4 | Proportional representation (D'Hondt method) | 120 | 16,736 | |
 Norway | Great Assembly[note 3] (Stortinget) | Unicameral | 4 | proportionalmixed | 169 | 29,785 | |
 Oman | Council of Oman (مجلس عُـمان,Majlis euman) | Consultative Assembly (مجلس الشورى,Majlis al-Shura) | Lower | 4 | 84 | 33,017 | |
| Council of State (مجلس الدولة,Majlis al-Dawla)[7] | Upper | 4 | 85 | 32,628 | |||
 Pakistan | Parliament of Pakistan (پارلیمنٹ,Pārlīmān orمجلسِ شوریٰ,Majlis-e-Shūrā,lit. 'Consultative Assembly') | National Assembly (ایوان زیریں,Aiwān-e-Zairīñ,lit. 'Lower house') | Lower | 5 | 342 | 537,023 | |
| Senate (ایوانِ بالا,Aiwān-e-Bālā,lit. 'Upper house') | Upper | 6 | 104 | 1,735,000 | |||
 Palau | National Congress (Olbiil era Kelulau) | House of Delegates[note 8] | Lower | 4 | majority | 16 | 1,309 |
| Senate[note 8] | Upper | 4 | majority | 13 | 2,328 | ||
 State of Palestine | Legislative Council (المجلس التشريعي,Al-Majlis al-Tashrī'iyy) | Unicameral | Paralleladditional member system | 132 | 32,277 | ||
 Panama | National Assembly (Asamblea Nacional) | Unicameral | 5 | First-past-the-post voting in outlying rural districts andparty-list proportional representation in cities | 71 | 47,969 | |
 Papua New Guinea | National Parliament[note 2] | Unicameral | 5 | Limitedinstant-runoff voting | 109 | 56,766 | |
 Paraguay | Congress (Congreso) | Chamber of Deputies (Cámara de Diputados) | Lower | 5 | 80 | 80,681 | |
| Chamber of Senators (Cámara de Senadores) | Upper | 5 | 45 | 143,434 | |||
 Peru | Congress of the Republic (Congreso de la República /Rimana Wasin) | Unicameral | 5 | Constituencies usingproportional representation with a 5%threshold | 130 | 217,082 | |
 Philippines | Congress (Kongreso) | House of Representatives (Kapulungan ng mga Kinatawan orMababang Kapulungan,lit. 'Lower house' /Cámara de Representantes) | Lower | 3 | Parallel voting:Largest remainder method viaclosed lists with a three-seat cap (20% of seats), andfirst-past-the-post voting (80% of seats) | 304 | 341,364 |
| Senate (Senado orMataas na Kapulungan,lit. 'Upper house') | Upper | 6 | bloc voting. Voter is allocated 12 votes. 1/2 of the seats are contested every 3 years with the 12 elected senators having the largest portion of the National Popular Vote | 24 | 4,323,958 | ||
 Poland | Parliament of Poland (Parlament) National Assembly (Zgromadzenie Narodowe[note 9]) | Sejm[note 3] (Sejm) | Lower | 4 | proportionalopen list | 460 | 83,697 |
| Senate (Senat) | Upper | 4 | majority | 100 | 385,010 | ||
 Portugal | Assembly of the Republic (Assembleia da República) | Unicameral | 4 | proportionalparty list | 230 | 45,920 | |
 Qatar | Consultative Assembly[note 10] (مجلس الشورى,Majlis ash-Shura) | Unicameral | 35 | 52,958 | |||
 Romania | Parliament (Parlamentul) | Chamber of Deputies (Camera Deputaților) | Lower | 4 | 329 | 58,416 | |
| Senate (Senat) | Upper | 4 | 137 | 139,005 | |||
 Russia | Federal Assembly (Федеральное Собрание,Federalnoye Sobraniye) | State Duma[note 3] (Государственная Дума,Gosudarstvennaya Duma) | Lower | 5 | parallel (First-past-the-post voting for 225 members andproportionalparty list for 225 members) | 450 | 318,000 |
| Federation Council (Совет Федерации,Sovet Federatsii) | Upper | dependent on individual elections in the federal subjects (4 or 5) | senators are delegated from the executive and legislative bodies of thefederal subjects | 170 | 862,048 | ||
 Rwanda | Parliament (Inteko Ishinga Amategeko /Parlement) | Chamber of Deputies (Umutwe w'Abadepite /Chambre des députés) | Lower | 5 | Closed party list (53 seats) andindirect election (27 seats) | 80 | 146,121 |
| Senate(Umutwe wa Sena /Sénat) | Upper | 8 | 26 | 449,603 | |||
 Saint Kitts and Nevis | National Assembly | Unicameral | 5 | First-past-the-post | 15 | 3,686 | |
 Saint Lucia | Parliament | House of Assembly | Lower | 5 | 17 | 10,221 | |
| Senate | Upper | 11 | 15,796 | ||||
 Saint Vincent and the Grenadines | House of Assembly | Unicameral | 5 | 21 | 5,714 | ||
 Samoa | Parliament (Palemene)[note 2] | Legislative Assembly[note 3] (Fono Aoao Faitulafono) | Unicameral | 5 | 51 | 3,916 | |
 San Marino | Grand and General Council (Consiglio Grande e Generale) | Unicameral | 5 | 60 | 536 | ||
 São Tomé and Príncipe | National Assembly (Assembleia Nacional) | Unicameral | 4 | 55 | 3,330 | ||
 Saudi Arabia | Consultative Assembly (مجلس الشورى,Majlis Ash-Shura)[note 11] | non-parliamentary | 4 | Appointed by theKing | 150 | 220,000 | |
 Senegal | National Assembly (Assemblée nationale) | Unicameral | 5 | Parallel system | 150 | 85,701 | |
 Serbia | National Assembly (Народна скупштина /Narodna skupština) | Unicameral | 4 | Party-list proportional representation with 3%electoral threshold | 250 | 28,482 | |
 Seychelles | National Assembly (Assemblée nationale /Lasanble Nasyonal) | Unicameral | 5 | Parallel voting | 31 | 2,709 | |
 Sierra Leone | Parliament | Unicameral | 5 | Party-list proportional representation | 146 | 40,136 | |
 Singapore | Parliament (Parlimen /国家议会,Guójiā yìhuì /நாடாளுமன்றம்,Nāṭāḷumaṉṟam) | Unicameral | 5 | First-past-the-post voting (MP) (in single member constituencies),Party block voting (in group representation constituencies), and appointed by thePresident (NMP) | 103 | 52,360 | |
 Slovakia | National Council (Národná rada) | Unicameral | 4 | Open listproportional representation with a 5%electoral threshold (7% for two-, three-party alliances; 10% for four-or-more party alliance) allocated under thelargest remainder method withHagenbach-Bischoff quota | 150 | 35,980 | |
 Slovenia | Parliament (Državni zbor Republike Slovenije) | National Assembly (Državni zbor) | Lower | 4 | Open list proportional representation with a 4% election threshold | 90 | 22,779 |
| National Council (Državni svet)[8] | Upper | 5 | First-past-the-post indirect elections held within 'functional' interest organisations and 'local' interest communities by electoral bodies (electors). | 40 | 51,254 | ||
 Solomon Islands | National Parliament | Unicameral | 4 | First-past-the-post | 50 | 10,460 | |
 Somalia | Federal Parliament (Baarlamaanka Federaalka /لبرلمان الاتحادي,albarlaman alaitihadi) | House of the People[note 8] | Lower | 4 | Appointed by president | 275 | 36,675 |
| Senate (Aqalka Sare) | Upper | 4 | majority | 54 | 180,100 | ||
 South Africa | Parliament | National Assembly | Lower | 5 | proportionalclosed list | 400 | 126,466 |
| National Council of Provinces | Upper | Elected by provincial legislatures | 90 | 562,075 | |||
 South Sudan | National Legislature | National Legislature Assembly | Lower | 170 | 48,591 | ||
| Council of States | Upper | Appointed by President | 50 | 165,210 | |||
 Spain | General Courts[note 3] (Cortes Generales) | Congress of Deputies (Congreso de los Diputados) | Lower | 4, unless elections are called earlier. | proportionalclosed list | 350 | 131,894 |
| Senate (Senado) | Upper | 4, unless elections are called earlier. | 208 are appointed through general election and 57 when regional legislatures are renewed, which not always happens at the same date | 265 | 173,545 | ||
 Sri Lanka | Parliament (පාර්ලිමේන්තුව,Parlimenthuwa /பாராளுமன்றம்,Nāṭāḷumaṉṟam) | Unicameral | 5 | Open list proportional representation | 225 | 90,122 | |
 Sudan | National Legislature (المجلس التشريعي,Al-Maǧlis al-Ttašriyʿiy) | National Assembly (المجلس الوطني,Al-Maǧlis al-Waṭaniy | Lower | 6 | 426 | 68,653 | |
| Council of States (المجلس الولايات,Al-Maǧlis al-Wilāyāt) | Upper | 6 | 50 | 617,880 | |||
 Suriname | National Assembly (Nationale Assemblée) | Unicameral | 5 | Open listproportional representation | 51 | 10,470 | |
 Sweden | Parliament (Riksdagen) | Unicameral | 4 | Openlist[9]proportional representation through theSainte-Laguë method with a 4%election threshold[10] in constituencies based upon theCounties of Sweden | 349 | 27,286 | |
 Syria | People's Assembly (مجلس الشعب,Majlis al-Sha'ab) | Unicameral | 4 | 250 | 86,964 | ||
 Switzerland | Federal Assembly (Bundesversammlung /Assemblée fédérale /Assemblea federale /Assamblea federala) | National Council (Nationalrat /Conseil national /Consiglio nazionale /Cussegl naziunal) | Lower | 4 | Open-listproportional withpanachage andapparentment by canton.[11] | 200 | 40,000 |
| Council of States (Ständerat /Conseil des États /Consiglio degli Stati /Cussegl dals chantuns) | Upper | 4 | Each canton has one or two seats,two-round orproportional representation depending on the canton. | 46 | 173,913 | ||
 Tajikistan | Supreme Assembly (Маҷлиси Олии,Majlisi Oli) | Assembly of Representatives (Маҷлиси намояндагон,Majlisi namoyandagon) | Lower | 5 | 63 | 123,809 | |
| National Assembly (Маҷлиси миллии,Majlisi Millii) | Upper | 5 | 33 | 236,363 | |||
 Tanzania | National Assembly (Bunge) | Unicameral | 5 | Parallel voting | 384 | 120,974 | |
 Thailand | National Assembly (รัฐสภา,Rạṭ̄hs̄p̣hā) | House of Representatives (สภาผู้แทนราษฎร,S̄p̣hā p̄hū̂thæn rās̄ʹḍr) | Lower | 4 | parallel (First-past-the-post voting for 400 members andproportionalparty list for 100 members) | 500 | 131,950 |
| Senate (วุฒิสภา,Wutthisapha) | Upper | 5 | Indirect limited voting with self-nomination | 200 | 329,876 | ||
 Togo | National Assembly (Assemblée nationale) | Unicameral | 5 | Party list proportional representation | 91 | 76,434 | |
 Tonga | Legislative Assembly (Fale Alea) | Unicameral | 4, Unless elections are called early | Single non-transferable vote | 25 | 3,962 | |
 Trinidad and Tobago | Parliament[note 2] | House of Representatives | Lower | 5 | 41 | 32,139 | |
| Senate | Upper | 31 | 42,506 | ||||
 Tunisia | Parliament of Tunisia (البرلمان التونسي,al-Barlamān at-Tūnsī) | Assembly of the Representatives of the People (مجلس نواب الشعب,Mejlis Nuwwēb esh-She‘b) | Lower | 5 | Two-round system | 161 | 72,722 |
| National Council of Regions and Districts (المجلس الوطني للجهات والأقاليم,Al Majlis Al Watani l'il Jihet W'al Akalim) | Upper | 5 | Indirecttwo-round system | 77 | 152,057 | ||
 Turkey | Grand National Assembly (Türkiye Büyük Millet Meclisi) | Unicameral | 5 | Closedlistproportional representation D'Hondt method with a 7%electoral threshold for political parties orpolitical alliances | 600 | 135,862 | |
 Turkmenistan | Assembly (Mejlis) | Unicameral | 5 | majority voting in single member constituencies. | 125 | 41,360 | |
 Tuvalu | Parliament (Palamene) | Unicameral | 4 | Multiple non-transferable vote | 15 | 666 | |
 Uganda | Parliament (Bunge) | Unicameral | 5 | Parallel voting:First-past-the-post voting (499 seats),Indirect election (30 seats) | 529 | 87,839 | |
 Ukraine | Supreme Council (Верховна Рада,Verkhovna Rada) | Unicameral | 5 | 450 | 101,248 | ||
 United Arab Emirates | Federal National Assembly (المجلس الوطني الإتحادي,Majlis Watani Ittihad) | Unicameral | 4 | 40 | 206,601 | ||
 United Kingdom | Parliament[note 2] | House of Commons | Lower | 5, unless elections are called earlier. | First-past-the-post voting in single member constituencies. | 650 | 95,787 |
| House of Lords | Upper | Life (life and hereditary peers) Until end of religious term[note 12](bishops) | Life peers appointed by theSovereign on advice of prime minister.[note 13] 92 are elected by and fromhereditary peers usingpreferential voting. 26Lords Spiritual arebishops of theChurch of England, chosen by the Church mainly based on seniority (except that female bishops are appointed regardless of seniority). | 827[note 14] | 86,700 | ||
 United States | Congress | House of Representatives | Lower | 2 | Depends on the state, mainlyFirst-past-the-post voting, in single-member constituencies. | 435 | 722,636 |
| Senate | Upper | 6 | Depends on the state, mainlyFirst-past-the-post voting. One-third of the Senate goes up for election every two years. Each state has two senators. | 100 | 3,432,530 | ||
 Uruguay | General Assembly (Asamblea General) | Chamber of Representatives (Cámara de Representantes) | Lower | 5 | 99 | 33,195 | |
| Chamber of Senators (Cámara de Senadores) | Upper | 5 | 30 | 109,543 | |||
 Uzbekistan | Supreme Assembly (Oliy Majlis,Олий Мажлис) | Legislative Chamber (Qonunchilik palatasi,Қонунчилик палатаси) | Lower | 5 | 150 | 194,156 | |
| Senate (Senati,Сенати) | Upper | 5 | 100 | 291,234 | |||
 Vanuatu | Parliament (Palamen /Parlement) | Unicameral | 4 | Single non-transferable vote | 52 | 4319 | |
 Vatican City/Holy See | Pontifical Commission (Pontificia Commissione /Pontificia Commissio) | Unicameral | 5 | 7 | 114 | ||
 Venezuela | National Assembly (Asamblea Nacional) | Unicameral | 5 | 277 | 175,430 | ||
 Vietnam | National Assembly (Quốc hội) | Unicameral | 5 | Plurality block voting | 500 | 176,385 | |
 Yemen | Parliament | House of Representatives (مجلس النواب,Majlis al-Nuwaab) | Lower | 6 | 301 | 81,485 | |
| Shura Council (مجلس الشورى,Majlis ash-Shura)[12] | Upper | Life | 111 | 220,963 | |||
 Zambia | National Assembly | Unicameral | 5 | First-past-the-post and appointments by thePresident | 166 | 87,284 | |
 Zimbabwe | Parliament | National Assembly | Lower | 5 | 210 | 61,971 | |
| Senate | Upper | 5 | 40 | 325,350 | |||
| Region or territory | Overall name of legislature | Name of house | House level | Term (years) | Voting system | Seats | Population per seat | |
|---|---|---|---|---|---|---|---|---|
 Adjara | Supreme Council of the Autonomous Republic of Adjara[note 3] (აჭარის ავტონომიური რესპუბლიკის უმაღლესი საბჭო) | Unicameral | 4 | 21 | 16,619 | |||
 Åland | Legislative Assembly[note 3] (Lagtinget) | Unicameral | 4 | 30 | 945 | |||
 Alderney | States (États) | Unicameral | 4 | 10 | 240 | |||
 American Samoa | Legislative Assembly[note 3] (Fono) | House of Representatives | Lower | 2 | 21 | 2,643 | ||
| Senate | Upper | 4 | 18 | 3,084 | ||||
 Anguilla | House of Assembly | Unicameral | 5 | 11 | 1,222 | |||
 Aosta Valley | Regional Council (Consiglio regionale/Conseil) | Unicameral | 5 | 35 | 3,597 | |||
 Aragon | Cortes (Cortes de Aragón, Corz d'Aragón, Corts d'Aragó) | Unicameral | 4 | Closed-list proportional (3 constituencies) | 67 | 20,173 | ||
 Aruba | Estates (Staten) | Unicameral | 4 | 21 | 4,832 | |||
 Azores | Legislative Assembly (Assembleia Legislativa) | Unicameral | 4 | 57 | 4,311 | |||
 Bangsamoro | Parliament | Unicameral | 3 | Parallel voting | 80 | 53,414 | ||
 Basque Country | Parliament | Unicameral | 4 | Closed party lists in three 25-seat constituencies, with seats allocated using theD'Hondt method | 75 | 29,194 | ||
 Bermuda | Parliament | House of Assembly | Lower | 5 | 36 | 1,784 | ||
| Senate | Upper | 11 | 5,839 | |||||
 British Virgin Islands | House of Assembly | Unicameral | 4 | 15 | 1,969 | |||
 Canary Islands | Parliament (Parlamento de Canarias) | Unicameral | 4 | 70 | 35,000 | |||
 Catalonia | Parliament (Parlament de Catalunya) | Unicameral | 4 | 135 | 55,723 | |||
 Cayman Islands | Legislative Assembly | Unicameral | 4 | 18 | 3,080 | |||
 Cook Islands | Parliament | Unicameral | 4 | 24 | 875 | |||
 Corsica | Corsican Assembly (Assemblea di Corsica / Assemblée de Corse) | Unicameral | 6 | 63 | 5,238 | |||
 Crimea | State Council (Верховна Рада / Верховный Совет / Yuqarı Radası) | Unicameral | 100 | 22,840 | ||||
 Curaçao | Estates (Staten) | Unicameral | 4 | 21 | 7,571 | |||
 Falkland Islands | Legislative Assembly | Unicameral | 4 | 11 | 272 | |||
 Faroe Islands | Law Assembly[note 3] (Løgtingið) | Unicameral | 4 | 33 | 1,467 | |||
 French Polynesia | Assembly (Assemblée de la Polynésie française) | Unicameral | 5 | At-largetwo-round in 8 sections, 19 seats plurality and 38 proportional, 12.5% or top-2 threshold for qualification.[a] | 57 | 4,859 | ||
 Galicia | Parliament (Parlamento da Galiza/Galicia) | Unicameral | 4 | 75 | 36,649 | |||
 Gibraltar | Parliament | Unicameral | 4 | 17 | 1,750 | |||
 Greenland | Parliament (Inatsisartut)[note 15] | Unicameral | 4 | 31 | 1,830 | |||
 Guam | Legislature (Liheslaturan Guåhan) | Unicameral | 4 | 15 | 10,623 | |||
 Guernsey | States (États) | Unicameral | 4 | 45 | 1,387 | |||
 Hong Kong | Legislative Council (立法會) | Unicameral | 4 | Multiple non-transferable vote (EC)First-past-the-post (FCs)Single non-transferable vote (GCs) | 90 | 83,368 | ||
 Isle of Man | Tynwald (Tinvaal) | House of Keys (Kiare as Feed) | Lower | 5 | Plurality (2 members from each constituency) | 24 | 3,520 | |
| Legislative Council (Yn Choonceil Slattyssagh) | Upper | 5 | Most members indirectly elected by the House of Keys | 11 | 7,681 | |||
 Jersey | States Assembly (Assemblée des États) | Unicameral | 4 | Mixedplurality block voting andfirst-past-the-post voting | 49 | 2,107 | ||
 Kurdistan Region | Kurdistan Region Parliament (پەرلەمانی کوردستان) | Unicameral | 5 | 111 | 53,109 | |||
 Macau | Legislative Assembly (立法會, Assembleia Legislativa) | Unicameral | 4 | Proportional representation, functional constituencies and appointed by the Chief Executive | 29 | 19,610 | ||
 Madeira | Legislative Assembly (Assembleia Legislativa) | Unicameral | 4 | 47 | 5,698 | |||
 Montserrat | Legislative Assembly | Unicameral | 5 | 9 | 546 | |||
| Nakhchivan Autonomous Republic | Supreme Assembly (Ali Məclisi) | Unicameral | 5 | 45 | 10,063 | |||
 New Caledonia | Congress (Congrès Territorial) | Unicameral | 5 | Closed-listproportional representation by province with 5% (of registered voters) threshold | 54 | 4,547 | ||
| Northern Ireland | Northern Ireland Assembly (Tionól Thuaisceart Éireann) | Unicameral | 5 | Single transferable vote | 90[13] | 16,767 | ||
 Northern Mariana Islands | Commonwealth Legislature | House of Representatives | Lower | 2 | 20 | 2,694 | ||
| Senate | Upper | 2 | 10 | 5,388 | ||||
 Niue | Assembly | Unicameral | 3 | 20 | 69 | |||
 Pitcairn Islands | Island Council | Unicameral | 3 | 10 | 6 | |||
 Puerto Rico | Legislative Assembly (Asamblea Legislativa) | House of Representatives (Cámara de Representantes) | Lower | 4 | First-past-the-post voting | 51 | 63,172 | |
| Senate (Senado) | Upper | 4 | Majority | 27 | 119,326 | |||
| Saint Barthélemy | Territorial Council | Unicameral | 5 | At-largetwo-round, 7 seats by plurality and 12 seats proportional, 10% or top-2 threshold for qualification.[b] | 19 | 488 | ||
 Saint Helena | Legislative Council | Unicameral | 4 | 21 | 1,266 | |||
| Saint Martin | Territorial Council [fr] (conseil territorial) | Unicameral | 6 | At-largetwo-round, 8 seats by plurality and 15 seats proportional, 10% or top-2 threshold for qualification.[c] | 23 | 1,578 | ||
| Saint Pierre and Miquelon | Territorial Council | Unicameral | 6 | At-largetwo-round, 10 seats by plurality and 9 seats proportional, 10% or top-2 threshold for qualification.[d] | 19 | 320 | ||
 Sardinia | Regional Council (Consiglio regionale) | Unicameral | 5 | 60 | 27,470 | |||
 Sark | Chief Pleas | Unicameral | 12 | 50 | ||||
 Scotland | Scottish Parliament (Pàrlamaid na h-Alba, Scots Pairlament) | Unicameral | 5 | Additional member system | 129 | 40,734 | ||
 Sicily | Regional Assembly (Assemblea Regionale) | Unicameral | 5 | 70 | 71,675 | |||
 Sint Maarten | Estates (Staten) | Unicameral | 4 | 15 | 2,495 | |||
 Tokelau | Parliament | Unicameral | 3 | 20 | 70 | |||
 Trentino-Alto Adige/Südtirol |  Trentino | Regional council | Provincial Council of Trento (Consiglio provinciale) | Unicameral | 5 | 35 | 15,405 | |
 South Tyrol | Landtag | Unicameral | 5 | 35 | 14,621 | |||
 Turks and Caicos Islands | House of Assembly | Unicameral | 4 | 21 | 1,498 | |||
 U.S. Virgin Islands | Legislature | Unicameral | 2 | 15 | 7,093 | |||
 Vojvodina | Assembly (Скупштина / Skupština / Képviselőháza / Adunarea / Zhromaždenie) | Unicameral | 4 | Proportional representation in a single constituency with a 5% threshold and seats being allocated usingd'Hondt method | 120 | 16,098 | ||
 Wales | Senedd (Welsh Parliament / Senedd Cymru) | Unicameral | 5 | Closed-list[14] | 96 | 32,625 | ||
| Wallis and Futuna | Territorial Assembly (Assemblée Territoriale) | Unicameral | 5 | Proportional representation by constituency | 20 | 650 | ||
 Zanzibar | House of Representatives (Baraza la Wawakilishi) | Unicameral | 5 | First-past-the-post voting | 88 | 17,086 | ||
| non-UN state | Overall name of legislature | Name of house | House level | Term (years) | Voting system | Seats | Population per seat |
|---|---|---|---|---|---|---|---|
 Abkhazia | People's Assembly (Жәлар Реизара,Zhelar Reizara) | Unicameral | 5 | 35 | 6,877 | ||
 Kosovo | Assembly of Kosovo (Albanian:Kuvendi i Kosovës,Serbian Cyrillic:Скупштина Косова) | Unicameral | 4 | 120 | 15,493 | ||
 Northern Cyprus | Assembly of the Republic (Cumhuriyet Meclisi) | Unicameral | 5 | 50 | 5,898 | ||
 Sahrawi Arab Democratic Republic | Sahrawi National Council (المجلس الوطني الصحراويAl-Majlis al-Watani al-Sahrawi) | Unicameral | 2 | 53 | |||
 Somaliland | Parliament (Baarlamaanka) | House of Representatives (Golaha Wakiilada) | Lower | 5 | 82 | 42,682 | |
| House of Elders (Golaha Guurtida) | Upper | 6 | 82 | 42,682 | |||
 South Ossetia | Parliament | Unicameral | 5 | 34 | 2,117 | ||
 Taiwan | Legislative Yuan (立法院Lìfǎ Yùan) | Unicameral | 4 | First-past-the-post voting,Closedparty-list proportional representation andindigenous seats withsingle non-transferable vote | 113 | 208,754 | |
 Central Tibetan Administration (in exile) | Parliament of the Central Tibetan Administration (གྲོས་ཚོགས་ཐོག་གསུང་བཤད།) | Unicameral | 5 | First-past-the-post voting | 43 | 73,953[note 16] | |
 Transnistria | Supreme Council[15] (Верховный Совет,Verkhovny Sovet) | Unicameral | 5 | 33 | |||
Opinions differ, however the majority of domestic experts agree that the National Council may be regarded as the upper house, but the bicameralism is distinctively incomplete.