| AFG | Afghanistan | __NATIONAL_SITE_TEXT__ | | 0 | 0 | 0 | 0 |
| ALB | Albania | __NATIONAL_SITE_TEXT__ | | 0 | 0 | 1 | 7 |
| ALG | Algeria | __NATIONAL_SITE_TEXT__ | | 0 | 0 | 0 | 0 |
| ARG | Argentina | __NATIONAL_SITE_TEXT__ | | 0 | 3 | 15 | 23 |
| ARM | Armenia | __NATIONAL_SITE_TEXT__ | | 2 | 11 | 43 | 26 |
| AUS | Australia | __NATIONAL_SITE_TEXT__ | 1995 | 10 | 35 | 78 | 42 |
| AUT | Austria | http://www.physikolympiade.at/ | 1988 | 4 | 12 | 37 | 61 |
| AZE | Azerbaijan | __NATIONAL_SITE_TEXT__ | | 5 | 11 | 26 | 20 |
| BAH | Bahrain | __NATIONAL_SITE_TEXT__ | | 0 | 0 | 0 | 0 |
| BGD | Bangladesh | http://www.bdpho.org/ | | 0 | 3 | 18 | 22 |
| BLR | Belarus | http://www.belpho.org/ | | 14 | 40 | 56 | 27 |
| BEL | Belgium | __NATIONAL_SITE_TEXT__ | | 0 | 1 | 21 | 49 |
| BEN | Benin | __NATIONAL_SITE_TEXT__ | | 0 | 0 | 0 | 0 |
| BOL | Bolivia | http://www.fiumsa.edu.bo/olimpiada/ | | 0 | 0 | 1 | 2 |
| BIH | Bosnia and Herzegovina | https://dfufbih.ba/ | | 0 | 5 | 16 | 39 |
| BWA | Botswana | __NATIONAL_SITE_TEXT__ | | 0 | 0 | 0 | 0 |
| BRA | Brazil | https://www1.fisica.org.br/olimpiada/ | | 7 | 17 | 51 | 16 |
| BRU | Brunei | __NATIONAL_SITE_TEXT__ | | 0 | 0 | 0 | 1 |
| BGR | Bulgaria | __NATIONAL_SITE_TEXT__ | 1971,1981 | 15 | 46 | 89 | 63 |
| BFA | Burkina Faso | __NATIONAL_SITE_TEXT__ | | 0 | 0 | 0 | 0 |
| KHM | Cambodia | __NATIONAL_SITE_TEXT__ | | 0 | 1 | 3 | 10 |
| CAN | Canada | __NATIONAL_SITE_TEXT__ | 1997 | 9 | 28 | 64 | 42 |
| CHI | Chile | __NATIONAL_SITE_TEXT__ | | 0 | 0 | 0 | 0 |
| CHN | People's Republic of China | __NATIONAL_SITE_TEXT__ | 1994 | 155 | 22 | 9 | 2 |
| COL | Colombia | http://oc.uan.edu.co/ | 2026 | 0 | 3 | 9 | 27 |
| CRI | Costa Rica | __NATIONAL_SITE_TEXT__ | | 0 | 0 | 1 | 2 |
| HRV | Croatia | __NATIONAL_SITE_TEXT__ | 2010 | 0 | 8 | 43 | 42 |
| CUB | Cuba | __NATIONAL_SITE_TEXT__ | 1991 | 0 | 3 | 10 | 13 |
| CYP | Cyprus | __NATIONAL_SITE_TEXT__ | | 0 | 2 | 4 | 20 |
| CZE | Czech Republic | http://fyzikalniolympiada.cz/ | | 10 | 38 | 62 | 37 |
| CZS | Czechoslovakia | __NATIONAL_SITE_TEXT__ | 1969,1977 | 15 | 24 | 29 | 27 |
| DEN | Denmark | __NATIONAL_SITE_TEXT__ | 2013 | 0 | 4 | 19 | 54 |
| ECU | Ecuador | __NATIONAL_SITE_TEXT__ | 2029 | 0 | 0 | 0 | 0 |
| EGY | Egypt | __NATIONAL_SITE_TEXT__ | | 0 | 2 | 3 | 0 |
| EST | Estonia | __NATIONAL_SITE_TEXT__ | 2012 | 6 | 23 | 45 | 47 |
| FIN | Finland | __NATIONAL_SITE_TEXT__ | 1992 | 2 | 10 | 40 | 81 |
| FRA | France | __NATIONAL_SITE_TEXT__ | 2025 | 8 | 54 | 42 | 20 |
| GMB | Gambia | __NATIONAL_SITE_TEXT__ | | 0 | 0 | 0 | 0 |
| GEO | Georgia | __NATIONAL_SITE_TEXT__ | | 3 | 14 | 35 | 32 |
| GDR | German Democratic Republic | __NATIONAL_SITE_TEXT__ | 1975,1987 | 8 | 14 | 35 | 27 |
| GER | Germany | https://www.scienceolympiaden.de/ipho | 1982 | 31 | 84 | 84 | 27 |
| GHA | Ghana | __NATIONAL_SITE_TEXT__ | | 0 | 0 | 0 | 0 |
| HEL | Greece | __NATIONAL_SITE_TEXT__ | | 0 | 0 | 9 | 32 |
| GTM | Guatemala | __NATIONAL_SITE_TEXT__ | | 0 | 0 | 0 | 0 |
| HND | Honduras | __NATIONAL_SITE_TEXT__ | | 0 | 0 | 0 | 0 |
| HKG | Hong Kong | __NATIONAL_SITE_TEXT__ | | 25 | 44 | 27 | 3 |
| HUN | Hungary | https://ipho.physics.bme.hu/ | 1968,1976,2027 | 45 | 70 | 104 | 35 |
| ISL | Iceland | __NATIONAL_SITE_TEXT__ | 1998 | 0 | 1 | 6 | 37 |
| IND | India | https://olympiads.hbcse.tifr.res.in/ | 2015 | 54 | 55 | 14 | 7 |
| IDN | Indonesia | __NATIONAL_SITE_TEXT__ | 2002,2017 | 28 | 43 | 49 | 26 |
| IRQ | Iraq | __NATIONAL_SITE_TEXT__ | | 0 | 0 | 0 | 0 |
| IRN | Islamic Republic of Iran | __NATIONAL_SITE_TEXT__ | 2007,2024 | 37 | 77 | 39 | 12 |
| IRL | Ireland | __NATIONAL_SITE_TEXT__ | | 0 | 0 | 9 | 18 |
| ISR | Israel | __NATIONAL_SITE_TEXT__ | 2019 | 13 | 55 | 39 | 24 |
| ITA | Italy | http://olifis.it/ | 1999 | 1 | 22 | 64 | 54 |
| CIV | Ivory Coast | __NATIONAL_SITE_TEXT__ | | 0 | 0 | 0 | 0 |
| JPN | Japan | __NATIONAL_SITE_TEXT__ | 2023 | 24 | 42 | 20 | 4 |
| KAZ | Kazakhstan | __NATIONAL_SITE_TEXT__ | 2014 | 14 | 48 | 31 | 25 |
| KEN | Kenya | __NATIONAL_SITE_TEXT__ | | 0 | 0 | 0 | 0 |
| PRK | Democratic People's Republic of Korea | __NATIONAL_SITE_TEXT__ | | 0 | 0 | 0 | 0 |
| KOR | Republic of Korea | __NATIONAL_SITE_TEXT__ | 2004,2028 | 92 | 29 | 24 | 7 |
| KSV | Kosovo | __NATIONAL_SITE_TEXT__ | | 0 | 0 | 0 | 0 |
| KWT | Kuwait | __NATIONAL_SITE_TEXT__ | | 0 | 0 | 0 | 0 |
| KGZ | Kyrgyzstan | __NATIONAL_SITE_TEXT__ | | 0 | 2 | 14 | 26 |
| LVA | Latvia | __NATIONAL_SITE_TEXT__ | | 1 | 5 | 38 | 43 |
| LIE | Liechtenstein | __NATIONAL_SITE_TEXT__ | 2016 | 0 | 0 | 2 | 3 |
| LTU | Lithuania | __NATIONAL_SITE_TEXT__ | 2021 | 2 | 16 | 49 | 47 |
| LUX | Luxembourg | __NATIONAL_SITE_TEXT__ | | 0 | 1 | 1 | 7 |
| MAC | Macau | __NATIONAL_SITE_TEXT__ | | 2 | 4 | 28 | 16 |
| MKD | North Macedonia | __NATIONAL_SITE_TEXT__ | | 0 | 1 | 11 | 17 |
| MDG | Madagascar | __NATIONAL_SITE_TEXT__ | | 0 | 0 | 0 | 0 |
| MAS | Malaysia | __NATIONAL_SITE_TEXT__ | | 1 | 2 | 18 | 30 |
| MRT | Mauritania | __NATIONAL_SITE_TEXT__ | | 0 | 0 | 0 | 0 |
| MEX | Mexico | __NATIONAL_SITE_TEXT__ | 2009 | 0 | 0 | 28 | 31 |
| MDA | Moldova | __NATIONAL_SITE_TEXT__ | | 1 | 13 | 39 | 38 |
| MNG | Mongolia | __NATIONAL_SITE_TEXT__ | | 0 | 13 | 34 | 35 |
| MNE | Montenegro | __NATIONAL_SITE_TEXT__ | | 0 | 0 | 2 | 5 |
| MAR | Morocco | __NATIONAL_SITE_TEXT__ | | 0 | 0 | 0 | 0 |
| MOZ | Mozambique | __NATIONAL_SITE_TEXT__ | | 0 | 0 | 0 | 0 |
| MMR | Myanmar | __NATIONAL_SITE_TEXT__ | | 0 | 0 | 0 | 0 |
| NLD | Netherlands | https://www.natuurkundeolympiade.nl/ | 1990 | 4 | 13 | 58 | 85 |
| NZL | New Zealand | __NATIONAL_SITE_TEXT__ | | 0 | 0 | 1 | 6 |
| NPL | Nepal | __NATIONAL_SITE_TEXT__ | | 0 | 0 | 5 | 15 |
| NIC | Nicaragua | __NATIONAL_SITE_TEXT__ | | 0 | 0 | 0 | 0 |
| NGA | Nigeria | __NATIONAL_SITE_TEXT__ | | 0 | 0 | 3 | 6 |
| NOR | Norway | __NATIONAL_SITE_TEXT__ | 1996 | 1 | 0 | 9 | 28 |
| PAK | Pakistan | __NATIONAL_SITE_TEXT__ | | 0 | 1 | 16 | 32 |
| PAN | Panama | __NATIONAL_SITE_TEXT__ | | 0 | 0 | 0 | 0 |
| PAR | Paraguay | __NATIONAL_SITE_TEXT__ | | 0 | 0 | 0 | 0 |
| PER | Peru | __NATIONAL_SITE_TEXT__ | | 0 | 0 | 0 | 0 |
| PHI | Philippines | __NATIONAL_SITE_TEXT__ | | 0 | 3 | 11 | 9 |
| POL | Poland | __NATIONAL_SITE_TEXT__ | 1967,1974,1989 | 24 | 52 | 87 | 69 |
| POR | Portugal | __NATIONAL_SITE_TEXT__ | 2018 | 0 | 2 | 13 | 45 |
| PRI | Puerto Rico | __NATIONAL_SITE_TEXT__ | | 0 | 0 | 1 | 4 |
| QAT | Qatar | __NATIONAL_SITE_TEXT__ | | 0 | 0 | 2 | 1 |
| ROU | Romania | __NATIONAL_SITE_TEXT__ | 1972,1983 | 62 | 93 | 62 | 30 |
| RUS | Russia | __NATIONAL_SITE_TEXT__ | 2030 | 99 | 49 | 10 | 4 |
| SLV | El Salvador | https://www.jovenestalento.edu.sv/ | | 0 | 2 | 5 | 9 |
| SAU | Saudi Arabia | __NATIONAL_SITE_TEXT__ | | 0 | 7 | 23 | 21 |
| SEN | Senegal | __NATIONAL_SITE_TEXT__ | | 0 | 0 | 0 | 0 |
| SRB | Serbia | __NATIONAL_SITE_TEXT__ | | 4 | 24 | 44 | 17 |
| SCG | Serbia and Montenegro | __NATIONAL_SITE_TEXT__ | | 0 | 2 | 4 | 6 |
| SGP | Singapore | __NATIONAL_SITE_TEXT__ | 2006 | 50 | 51 | 27 | 25 |
| SVK | Slovakia | __NATIONAL_SITE_TEXT__ | | 9 | 27 | 59 | 38 |
| SVN | Slovenia | __NATIONAL_SITE_TEXT__ | | 5 | 12 | 48 | 47 |
| SAF | South Africa | __NATIONAL_SITE_TEXT__ | | 0 | 0 | 0 | 1 |
| ESP | Spain | __NATIONAL_SITE_TEXT__ | 2005 | 1 | 5 | 28 | 45 |
| LKA | Sri Lanka | __NATIONAL_SITE_TEXT__ | | 0 | 2 | 17 | 12 |
| SUR | Suriname | __NATIONAL_SITE_TEXT__ | | 0 | 0 | 1 | 2 |
| SWE | Sweden | __NATIONAL_SITE_TEXT__ | 1984 | 1 | 12 | 30 | 64 |
| SUI | Switzerland | https://physics.olympiad.ch/en/ | 2016,2022 | 2 | 6 | 29 | 58 |
| SYR | Syria | __NATIONAL_SITE_TEXT__ | | 0 | 2 | 8 | 22 |
| TWN | Taiwan | __NATIONAL_SITE_TEXT__ | 2003 | 85 | 36 | 18 | 8 |
| TJK | Tajikistan | __NATIONAL_SITE_TEXT__ | | 0 | 3 | 16 | 15 |
| TZA | Tanzania | __NATIONAL_SITE_TEXT__ | | 0 | 0 | 0 | 0 |
| THA | Thailand | __NATIONAL_SITE_TEXT__ | 2011 | 38 | 52 | 24 | 18 |
| TTO | Trinidad and Tobago | __NATIONAL_SITE_TEXT__ | | 0 | 0 | 0 | 0 |
| TUN | Tunisia | __NATIONAL_SITE_TEXT__ | | 0 | 0 | 0 | 0 |
| TUR | Türkiye | http://www.tubitak.gov.tr/tr/olimpi... | 2001 | 13 | 53 | 57 | 33 |
| NCY | Turkish Republic of Northern Cyprus | __NATIONAL_SITE_TEXT__ | | 0 | 0 | 0 | 0 |
| TKM | Turkmenistan | __NATIONAL_SITE_TEXT__ | | 0 | 6 | 16 | 22 |
| UGA | Uganda | __NATIONAL_SITE_TEXT__ | | 0 | 0 | 0 | 0 |
| UKR | Ukraine | __NATIONAL_SITE_TEXT__ | | 19 | 62 | 61 | 13 |
| UAE | United Arab Emirates | __NATIONAL_SITE_TEXT__ | | 3 | 0 | 6 | 4 |
| UNK | United Kingdom | http://www.bpho.org.uk/ | 1986,2000 | 13 | 55 | 86 | 22 |
| USA | United States of America | https://www.aapt.org/physicsteam/ | 1993 | 83 | 51 | 29 | 11 |
| URY | Uruguay | __NATIONAL_SITE_TEXT__ | | 0 | 0 | 0 | 0 |
| USS | Union of Soviet Socialist Republics | __NATIONAL_SITE_TEXT__ | 1970,1979 | 41 | 26 | 22 | 12 |
| UZB | Uzbekistan | __NATIONAL_SITE_TEXT__ | | 0 | 0 | 6 | 11 |
| VEN | Venezuela | __NATIONAL_SITE_TEXT__ | | 0 | 0 | 0 | 0 |
| VNM | Vietnam | __NATIONAL_SITE_TEXT__ | 2008 | 45 | 58 | 49 | 18 |
| YUG | Yugoslavia | __NATIONAL_SITE_TEXT__ | 1985 | 2 | 12 | 23 | 30 |
| ZWE | Zimbabwe | __NATIONAL_SITE_TEXT__ | | 0 | 0 | 0 | 0 |
