UK IMO Register: Links to lists of other countries’ teams

Some of the other countries competing the the IMO have lists of their past team members online. Please let me know about any such lists you know of that are not linked to here, including more complete lists for the countries where the lists I have linked to are not complete. (I’m looking for lists aiming at completeness, rather than ones with just the teams from the past year or two for countries that have been competing longer. Lists that have not been updated recently and are missing teams from the past year or two are OK; names and scores, but no further information, are available from the official IMO site.)

The following lists of countries, derived from various sources, are believed to include all countries that participated in any IMO and the range of years of their participation. Countries have not necessarily competed in every year in the ranges listed below; there have been long gaps in some cases. I do not have details of the countries that participated in the unofficial 1980 events, so any countries that first or only participated at those events do not have that fact noted below.

The following 116 countries have competed in 2022, 2023 or 2024. (Countries that competed in the past three years normally receive an automatic invitation to the next IMO.)

• Albania (since 1993)
• Algeria (since 1977)
• Argentina (since 1988)
• Armenia (since 1992/3)
• Australia (since 1981)
• Austria (since 1970)
• Azerbaijan (since 1992/3)
• Bangladesh (since 2005)
• Belarus (since 1992/3)
• Belgium (since 1969)
• Bhutan (since 2024)
• Bolivia (since 1997)
• Bosnia-Herzegovina (since 1993)
• Botswana (since 2015)
• Brazil (since 1979)
• Bulgaria (since 1959)
• Burkina Faso (since 2014; last in 2023)
• Cameroon (only in 2023)
• Canada (since 1981)
• Chile (since 1994)
• China (since 1985)
• Colombia (since 1981) (not a complete list of team members)
• Costa Rica (since 2005)
• Croatia (since 1993)
• Cuba (since 1971)
• Cyprus (since 1984)
• Czech Republic (since 1993)
• Denmark (since 1991)
• Dominican Republic (since 2019)
• Ecuador (since 1988)
• El Salvador (since 2005)
• Estonia (since 1992/3)
• Finland (since 1965)
• France (since 1967)
• Georgia (since 1993)
• Germany (since 1991)
• Ghana (since 2014)
• Greece (since 1975)
• Guatemala (since 1997; last in 2023)
• Honduras (since 2008)
• Hong Kong (since 1988)
• Hungary (since 1959) (journal archives including past IMO reports)
• Iceland (since 1985)
• India (since 1989)
• Indonesia (since 1988)
• Iran (since 1985)
• Iraq (since 2016)
• Ireland (since 1988)
• Israel (since 1979)
• Italy (since 1967)
• Ivory Coast (since 2010)
• Japan (since 1990)
• Kazakhstan (since 1992/3)
• Kenya (since 2016)
• Kosovo (since 2011)
• Kyrgyzstan (since 1993)
• Latvia (since 1992/3)
• Liechtenstein (since 2005)
• Lithuania (since 1992/3)
• Luxembourg (since 1979)
• Macau (since 1990)
• Malaysia (since 1995)
• Mauritania (since 2009; last in 2023)
• Mexico (since 1981)
• Moldova (since 1992)
• Mongolia (since 1964)
• Montenegro (since 2007; last in 2023)
• Morocco (since 1983; last in 2023)
• Myanmar (since 2016)
• Nepal (since 2017)
• Netherlands (since 1969)
• New Zealand (since 1988)
• Nicaragua (since 1987)
• North Macedonia (since 1993)
• Norway (since 1984)
• Oman (since 2020)
• Pakistan (since 2005)
• Palestine (only in 2022)
• Panama (since 1987)
• Paraguay (since 1997)
• Peru (since 1987)
• Philippines (since 1988)
• Poland (since 1959)
• Portugal (since 1989)
• Puerto Rico (since 1997)
• Romania (since 1959)
• Rwanda (since 2021)
• Saudi Arabia (since 2004)
• Serbia (since 2006)
• Singapore (since 1988)
• Slovakia (since 1993) (from the Internet Archive, original site no longer available)
• Slovenia (since 1993)
• South Africa (since 1992)
• South Korea (since 1988)
• Spain (since 1983)
• Sri Lanka (since 1995)
• Sweden (since 1967)
• Switzerland (since 1991) (not a complete list of team members)
• Syria (since 2009)
• Taiwan (since 1992)
• Tajikistan (since 2005)
• Tanzania (since 2014; last in 2023)
• Thailand (since 1989)
• Trinidad and Tobago (since 1991)
• Tunisia (since 1981)
• Turkey (since 1978)
• Turkmenistan (since 1992)
• Uganda (since 2012)
• Ukraine (since 1992/3)
• United Arab Emirates (since 2008)
• United Kingdom (since 1967)
• United States of America (since 1974)
• Uruguay (since 1987)
• Uzbekistan (since 1997)
• Venezuela (since 1981)
• Vietnam (since 1974)

The following 16 countries have competed in the IMO in the past.

• Angola (only in 2019)
• Bahrain (1990–1993)
• Benin (2009–2014)
• Brunei (only in 2000)
• Cambodia (2007–2019)
• Egypt (2016–2021)
• Gambia (only in 2014)
• Jamaica (only in 2016)
• Kuwait (1982–2012)
• Laos (only in 2016)
• Madagascar (only in 2016)
• Nigeria (2006–2021)
• North Korea (1990–2019)
• Mozambique (2004–2006)
• Russia (1992–2021) (journal archives including past IMO reports)
• Zimbabwe (2009–2014)

The following 1 “country” has competed in the IMO in the past, but is not recognised by most countries.

• Turkish Republic of Northern Cyprus (only in 1993)

The following countries which no longer exist have competed in the IMO in the past.

• Czechoslovakia (1959–1992)
• East Germany (GDR) (1959–1990)
• USSR (1959–1991). There was a CIS team in 1992 only, alongside a Russian team and 28 individual students from 8 countries not officially competing (Estonia, Lithuania, Latvia, Armenia, Azerbaijan, Belarus, Kazakhstan, Ukraine).
• West Germany (FRG) (1976/7–1990)
• Yugoslavia (former) (1963–1991); Yugoslavia (Serbia and Montenegro) (1992–2002); Serbia and Montenegro (2003–2005)

The following countries have never competed in the IMO. Some may have sent observers, or planned to compete but been unable to send a team. In addition there are various dependent and other territories not generally considered as countries (some of which may have sent team members as part of another country’s team, while some teams may be sent by dependent territories or parts of countries). Various disputed territories that have declared independence are not listed.

• Africa: Burundi, Cape Verde, Central African Republic, Chad, Comoros, Republic of Congo, Democratic Republic of The Congo, Djibouti, Equatorial Guinea, Eritrea, Ethiopia, Gabon, Guinea, Guinea-Bissau, Lesotho, Liberia, Libya, Malawi, Mali, Mauritius, Namibia, Niger, São Tomé and Principé, Senegal, Seychelles, Sierra Leone, Somalia, South Sudan, Sudan, Swaziland, Togo, Zambia
• Asia: Afghanistan, Bhutan, East Timor, Jordan, Lebanon, Maldives, Qatar, Yemen
• Europe: Andorra, Malta, Monaco, San Marino, Vatican City
• North and Central America: Antigua and Barbuda, Bahamas, Barbados, Belize, Dominica, Dominican Republic, Grenada, Haiti, Saint Kitts and Nevis, Saint Lucia, Saint Vincent and the Grenadines
• Oceania: Fiji, Kiribati, Marshall Islands, Micronesia, Nauru, Palau, Papua New Guinea, Samoa, Solomon Islands, Tonga, Tuvalu, Vanuatu
• South America: Guyana, Suriname

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