Initial discussions about forming aMarxist political party inLithuania began early in 1895, with a number of informal gatherings bringing together social democrats of various stripes resulting in a preparatory conference in the summer of that year.[8] Differences in objectives became clear between ethnicJews and ethnicLithuanians andPoles, with the former seeing themselves essentially as Russian Marxists while the latter two groups harboured both revolutionary and national aspirations.[9] Moreover, the ethnic Poles and Lithuanians saw themselves divided over the question of alliance with non-Marxist liberals. As a result, not one but three Marxist political organisations would emerge in Lithuania between 1895 and 1897.[10]
The Social Democratic Party of Lithuania (LSDP) was founded on 1 May(19 April O.S.) 1896 at a secret congress held in an apartment inVilnius.[11] Among the 13 delegates wereAndrius Domaševičius andAlfonsas Moravskis—a pair of intellectuals regarded as the central organisers of the new political entity—and the future President of Lithuania,Kazys Grinius, as well as a number of worker activists.[12] Also in attendance as a representative of the radical youth movement was an 18-year-old ethnic Pole namedFelix Dzerzhinsky, later the head of theSoviet secret police.[11] As Lithuania was then part of theRussian Empire, the LSDP was inevitably an illegal organisation, meeting in secret and seeking to bring about the revolutionary overthrow of theTsarist regime.
This smuggling of Lithuanian newspapers had historical antecedents. Following thePolish and Lithuanian Uprising of 1863, the Tsarist regime had banned publication of all newspapers which used theLatin alphabet, a measure which amounted to ade facto ban of the entire Lithuanian press.[17] This proscription extended for the rest of the 19th Century; in 1898 of 18 newspapers appearing in Lithuanian, 11 were published by Lithuanians in emigration in America and the other 7 were published in East Prussia.[17]
The LSDP was very nearly obliterated at birth by theOkhrana, which over the course of 1897 to 1899 managed to arrest a number of the party's leading activists.[15] Approximately 280 socialist andtrade union organisers were apprehended during this period, with subsequent trials leading to theSiberian exile of more than 40 people, including Domaševičius and Dzerzhinsky.[15] Other top leaders, including Moravskis, were forced to flee the country to avoid being swept up in the Okhrana's dragnet.[15] With the party leadership jailed or chased from the country, the LSDP very nearly ceased to exist as the 19th century drew to a close.[15]
From 1900 to 1902, the Social Democratic Party of Lithuania began to tentatively rise from the ashes behind a new crop of young revolutionaries.[15] Chief among these were a pair of Lithuanian students in Vilnius, Vladas Sirutavičius and Steponas Kairys.[18]
It was the first Lithuanian political party and one of the major parties who initiated the assembly calledGreat Seimas of Vilnius in 1905. In the Great Seimas, it represented the most radical left wing of the assembly and had poor relations with the assembly's other representatives, which belonged to the liberalLithuanian Democratic Party and the LithuanianChristian democratic current. These two parties opposed LSDP's program of armed struggle against the Russian government and it was thus not adopted by the assembly.[19]
The party was one of the major political powers during the Lithuanian independence period between 1918 and 1940. Following the election of 1926, the party formed a left-wing coalition government with Lithuanian Peasant Popular Union. This government was dismissed after the1926 Lithuanian coup d'état. The authoritarian regime ofAntanas Smetona banned all political parties in 1936.
During theSoviet occupation era, no democratically constituted political parties existed within Lithuania. Therefore, between 1945 and the 1989 restoration of independence, the party was assembled and worked covertly in exile.[citation needed]
In 1989, the Social Democratic Party of Lithuania was restored.Kazimieras Antanavičius was elected to be party's leader. The party had 9 seats in theSupreme Council – Reconstituent Seimas and was not successful in substantially increasing the number in the following elections, with 8 seats won in1992 and 12 in1996.
In 2001, the Social Democratic Party of Lithuania and theDemocratic Labour Party of Lithuania merged. The merged party kept the Social Democratic name, but was dominated by former Democratic Labour Party members (ex-Communists). After the merger, Algirdas Brazauskas was elected leader of the Social Democratic Party.
By the beginning of 2004, negotiations between the Social Democratic Party of Lithuania and various other parties to form electoral coalition.[22] They managed to form electoral coalition called "Working for Lithuania" with their coalition partners, New Union.[23] At the2004 legislative elections, the Social Democratic Party of Lithuania won 20 of the 141 seats in the Seimas (other 11 seats were won by the New Union), but managed to stay at the helm of successive coalition governments, includingthe minority government between 2006 and 2008. During the minority government, party's parliamentary group became the largest one in parliament, mainly due to defections from the Labour Party and the New Union (Social Liberals).
Brazauskas resigned as the chairman of the party on 19 May 2007 and was replaced byGediminas Kirkilas.
At the2008 elections, the party won 11.73% of the national vote and 25 seats in theSeimas, five more than in the previous elections. However, its coalition partners, theLabour Party, theNew Union (Social Liberals) and the Lithuanian Peasants Popular Union, fared poorly and the party ended up in opposition to theHomeland Union-led government.
In 2017, the Social Democratic Party withdraw from coalition. In 2018, some party members left and formed theSocial Democratic Labour Party of Lithuania. After this split, the party lost a lot of support, but in 2019 it partly recovered.
At the2020 parliamentary elections, the party achieved worse results than expected. Due to this,Gintautas Paluckas received criticism from party's board and resigned in 2021. Aftera leadership election,Vilija Blinkevičiūtė (between 2002 and 2006 she was New Union (Social Liberals) member) was elected as the new leader. After election of Blinkevičiūtė, the party's support nearly doubled thanks to her personal popularity.[25]
In the2024 parliamentary elections, the party achieved a "historic victory",[26] finishing in first place with 19.32% of the popular vote and 52 out of 141 seats.[27] While party chair Vilija Blinkevičiūtė had expressed her willingness to serve as prime minister during the campaign, she declined the role after the election, leading instead to the nomination of deputy chair Gintautas Paluckas. This unexpected change in leadership was criticized by the LSDP's potential coalition partners.[28]
In power, the Paluckas Cabinet raised Lithuania's defense funding to it's highest level in the country's history, reformed theretirement fund system, re-established the option for low-income families to choose a public electricity supplier, increasedchild benefits and funding for education, abolished premiums for private healthcare services which are financed by the state healthcare fund, and established a road fund.[36] On 27 June 2025, a taxation reform put forward by the Social Democrats was approved by the Seimas, which established aprogressive taxation system for personal income with three tax brackets, raisedcorporate tax and established new taxes on sugar and non-life insurance.[37]
On 31 July 2025, following a series of investigative reports on his allegedly corrupt business dealings,Gintautas Paluckas announced his resignation as prime minister and chair of the Social Democratic Party. Due to Paluckas's resignation, the LSDP first deputy chairMindaugas Sinkevičius became the acting chair of the party.[38] On 4 August,Rimantas Šadžius was appointed as the acting prime minister of Lithuania.[39]
LSDP is generally described as acentre-left party.[25][40][41] Historically, the party was criticized for lacking commitment tosocial democracy. According to political scientistAinė Ramonaitė [lt], "before their split, the Social Democrats never managed to be a left-wing party. Although they said they were, their policies were right-wing, even the vocabulary was closer to the right".[42] During theEleventh Seimas from 2012 to 2016, when the party played a leading role in theButkevičius Cabinet, it was criticized by left-wing intellectuals such asAndrius Bielskis [lt] and Arkadijus Vinokuras for lacking allegiance to left-wing ideas and for itsneoliberal policies, such as reforms to the Labour Code in 2016 which strengthened the position of employers in workplace relations.[43]
In 2017, afterGintautas Paluckas was elected as the party's chairman, LSDP declared a renewal of its ideology and values, reforming closer to a Western social democratic party.[44] It introduced a new program, in which it affirmed commitment toprogressive taxation, encouragement ofworker cooperatives,women's rights andLGBT rights, andsupport for NATO and theEuropean Union, while at the same time opposing Europeanausterity policies.[45] Several of the party's former leaders and members of the Seimas left the party in 2017 and 2018, including two former Prime Ministers,Gediminas Kirkilas andAlgirdas Butkevičius. Most of them then established the Social Democratic Labour Party, later renamed to theLithuanian Regions Party.[46] However, this renewal was also criticized as incomplete and straddling the fence between progressiveness and the party's previous non-ideologicalpopulism.[47]
After Paluckas' resignation,Vilija Blinkevičiūtė was elected as LSDP's new chairman. The party's program was retained, and conservative former party members such asArtūras Skardžius were not accepted back into the party.[48] However, the party has since focused most on criticism of theHomeland Union and progressive economic proposals over social justice and social reforms. 5 of 13 of the party's members of the Seimas voted against a proposedsame-sex partnership law in 2021, even though the party's program was in favor of same-sex partnerships.[49] TheLeft Alliance was founded in 2022 in response to the Social Democrats' alleged betrayal of left-wing values.[50]
The party supports loweringvoting age to 16 in local elections.[51]
After merger of these two parties, LSDP gained support from most supporters of LDDP. In early 2010s, the party lost support due to deindustrialisation, rise of public election committees andLithuanian Farmers and Greens Union (e. g. inKaunas, by 2011, got over 12 per cent of votes; however, in 2019, the party received just over 3 per cent of the votes).[55][56]
^Leonas Sabaliūnas,Lithuanian Social Democracy in Perspective. Durham, NC: Duke University Press, 1990; pp. 25, 27.
^Leonas Sabaliūnas,Lithuanian Social Democracy in Perspective, pp. 25–26.
^Hardline Poles and Lithuanians opposed to cooperation with liberals would establish a party called theUnion of Workers in Lithuania in 1896, headed by Stanislaw Trusiewicz. Jewish radicals would launch theGeneral Jewish Labour Bund in Lithuania, Poland and Russia in 1897. See: Sabaliūnas,Lithuanian Social Democracy in Perspective, pp. 26–27 andpassim.
^abSabaliūnas,Lithuanian Social Democracy in Perspective, pg. 27.
^Sabaliūnas,Lithuanian Social Democracy in Perspective, pp. 27–28.
^Sabaliūnas,Lithuanian Social Democracy in Perspective, pg. 29.
^Sabaliūnas,Lithuanian Social Democracy in Perspective, pp. 29–30.
^abcdefSabaliūnas,Lithuanian Social Democracy in Perspective, pg. 30.
^abAlfred Erich Senn andAlfonsas Eidintas, "Lithuanian Immigrants in America and the Lithuanian National Movement before 1914,"Journal of American Ethnic History, vol. 6, no. 2 (Spring 1987), pg. 7.
^Sabaliūnas,Lithuanian Social Democracy in Perspective, pp. 30–31.
^"PES 🌹🇪🇺".X. 12 December 2024.Congratulations to our member party in #Lithuania, LSDP, who today had their new government programme and cabinet approved!
^Hyndle-Hussein, Joanna (19 December 2019)."The centre-left government takes power in Lithuania".Centre for Eastern Studies.The coalition, which has a constitutional majority, has been formed by centre-left groupings: the Social Democrats, the Labour Party, Order and Justice, and the Electoral Action of Poles in Lithuania (AWPL).
^Jonaitytė, Ugnė (11 December 2019)."Lietuvos politikoje įžvelgė įdomų posūkį: tai nebe ideologijos, o valstybės išlikimo klausimas".LRT (in Lithuanian).„Iki šios partijos skilimo socialdemokratams niekaip nepavykdavo būti kairiąja partija. Nors ir sakydavo, kad tokia yra, visa politika buvo dešinioji, netgi žodynas buvo labiau būdingas dešiniesiems. Tikėtina, kad situacija ateinančiuose rinkimuose bus kita, nes pati partija atsinaujino ir vis dažniau kalba apie kairiąsias idėjas", – mintimis dalijasi A. Ramonaitė.
Diana Janušauskienė, "Youth Political Organizations in Lithuania,"Polish Sociological Review, no. 139 (2002), pp. 337–356.In JSTOR
Vladas Krivickas, "The Programs of the Lithuanian Social Democratic Party, 1896–1931,"Journal of Baltic Studies, no. 2 (1980), pp. 99–111.
Vladimir Levin, "Lithuanians in Jewish Politics of the Late Imperial Period," in Vladas Sirutavičius and Darius Staliūnas (eds.),A Pragmatic Alliance: Jewish-Lithuanian Political Cooperation at the Beginning of the 20th Century. Budapest: Central European University Press, 2011; pp. 77–118.
Ezra Mendelsohn,Class Struggle in the Pale: The Formative Years of the Jewish Workers' Movement in Tsarist Russia. Cambridge, England: Cambridge University Press, 1970.
Toivo U. Raun, "The Revolution of 1905 in the Baltic Provinces and Finland,"Slavic Review, no. 3 (1984), pp. 453–467.
Leonas Sabaliūnas,Lithuanian Social Democracy in Perspective. Durham, NC: Duke University Press, 1990.
Leonas Sabaliūnas, "Social Democracy in Tsarist Lithuania, 1893–1904,"Slavic Review, vol. 31, no. 2 (June 1972), pp. 323–342.In JSTOR
James D. White, "National Communism and World Revolution: The Political Consequences of German Military Withdrawal from the Baltic Area in 1918–19,"Europe-Asia Studies, vol. 46, no. 8 (1994), pp. 1349– 1369.In JSTOR
James D. White, "The Revolution in Lithuania 1918–19,"Soviet Studies, vol. 23, no. 2 (Oct. 1971), pp. 186–200.In JSTOR