| Code | Country | Contact | National MO site | IMO Host |
|---|
| AFG
| Afghanistan
| Onder Akkusci <>
|
|
|
| ALB
| Albania
| Adrian Naço <>
| https://www.ama.org.al
|
|
| ALG
| Algeria
| Abdelhafid Hadjsadok - Abdallah Rahmani <>
|
|
|
| AGO
| Angola
| Gabriel Boaventura <>
|
|
|
| ARG
| Argentina
| Patricia Fauring <>
| http://www.oma.org.ar/
| 1997, 2012
|
| ARM
| Armenia
| Smbat Gogyan <>
| http://www.olymp.am
|
|
| AUS
| Australia
| Ben Kirk <>
| http://www.amt.edu.au/
| 1988, 2025
|
| AUT
| Austria
| Robert Geretschläger <>
| https://www.oemo.at
| 1976
|
| AZE
| Azerbaijan
| Fuad Garayev <>
|
|
|
| BAH
| Bahrain
| Ebrahim Yousif <>
|
|
|
| BGD
| Bangladesh
| Mahbub Majumdar <>
| http://www.matholympiad.org.bd/
|
|
| BLR
| Belarus
| Mikhail Karpuk <>
|
|
|
| BEL
| Belgium
| Bart Windels <>
| https://www.vwo.be/vwo/belgianmatholympiads
|
|
| BEN
| Benin
| Leonard Todjihounde <>
|
|
|
| BOL
| Bolivia
| Sonia Cordero Cárdenas <>
|
|
|
| BIH
| Bosnia and Herzegovina
| Muharem Avdispahić <>
|
|
|
| BWA
| Botswana
| Mmoloki Lekhutlile <>
|
|
|
| BRA
| Brazil
| Edmilson Luis Rodrigues Motta <>
| http://www.obm.org.br/
| 2017
|
| BRU
| Brunei
| Syed Rozman bin Haji Syed Abd Rahim <>
|
|
|
| BGR
| Bulgaria
| Stanislav Harizanov <>
| http://www.math.bas.bg
| 1966, 1975
|
| BFA
| Burkina Faso
| Victor Barry <>
|
|
|
| KHM
| Cambodia
| Meak Kamerane <>
|
|
|
| CAN
| Canada
| Jessica Wallace <>
| http://www.cms.math.ca/Olympiads/
| 1995
|
| CHI
| Chile
| Hernan Burgos <>
| http://www.olimpiadadematematica.cl/
|
|
| CHN
| People's Republic of China
| Qian Cheng <>
|
| 1990
|
| COL
| Colombia
| María Falk Losada <>
| http://oc.uan.edu.co
| 2013
|
| CIS
| Commonwealth of Independent States
|
|
|
|
| CRI
| Costa Rica
| Comisión de las Olimpiadas Costarricenses de Matemáticas <>
| http://olcoma.ucr.ac.cr/
|
|
| HRV
| Croatia
| Matija Bašić <>
| http://www.matematika.hr/index.php/natjecanja/
|
|
| CUB
| Cuba
| Nelson Tomás Hernandez Reyes <>
|
| 1987
|
| CYP
| Cyprus
| Gregory Makrides <>
| http://www.cms.org.cy
|
|
| CZE
| Czech Republic
| Pavel Calábek <>
| http://www.matematickaolympiada.cz/
|
|
| CZS
| Czechoslovakia
|
|
| 1962, 1971, 1984
|
| DEN
| Denmark
| Kirsten Rosenkilde <>
| http://www.georgmohr.dk/
|
|
| DOM
| Dominican Republic
| Zulaicka Guzmán <>
|
|
|
| ECU
| Ecuador
| Vicente Torres Álvarez <>
| http://omec-mat.org
|
|
| EGY
| Egypt
| Yasser Tawfik <>
|
|
|
| EST
| Estonia
| Oleg Košik <>
| http://www.math.olympiaadid.ut.ee/
|
|
| FIN
| Finland
| Anne-Maria Ernvall-Hytönen <>
| http://matematiikkakilpailut.fi/
| 1985
|
| FRA
| France
| Vincent Jugé et Johan Yebbou <>
| http://www.animath.fr/
| 1983
|
| GMB
| Gambia
| Kolapo I. Abdul <>
|
|
|
| GEO
| Georgia
| George Chelidze <>
|
|
|
| GDR
| German Democratic Republic
| Hans-Dietrich Gronau <>
|
| 1965, 1974
|
| GER
| Germany
| Jürgen Prestin <>
| https://www.mathe-wettbewerbe.de/
| 1989, 2009
|
| GHA
| Ghana
| Joel M. Dogoe <>
| http://www.misemaths.org
|
|
| HEL
| Greece
| Anargyros Fellouris <>
| http://www.hms.gr
| 2004
|
| GTM
| Guatemala
| José Carlos Bonilla <>
|
|
|
| HND
| Honduras
| Comité Hondureño de Olimpiadas Matemáticas <>
|
|
|
| HKG
| Hong Kong
| Lander Lam <>
|
| 1994, 2016
|
| HUN
| Hungary
| Péter Frenkel <>
|
| 1961, 1970, 1982
|
| ISL
| Iceland
| Friđrik Diego <>
| http://stae.is/stak/keppnin
|
|
| IMO
| IMO
|
|
|
|
| IND
| India
| Prof. Prithwijit De <>
| http://olympiads.hbcse.tifr.res.in/subjects/mathematics
| 1996
|
| IDN
| Indonesia
| Aleams Barra <>
| http://www.tomi.or.id
|
|
| IRQ
| Iraq
| Cuneyt Kilic <>
|
|
|
| IRN
| Islamic Republic of Iran
| Erfan Salavati <>
| http://www.mathysc.ir
|
|
| IRL
| Ireland
| Bernd Kreussler <>
| http://www.irmo.ie
|
|
| ISR
| Israel
| Lev Radzivilovsky <>
| http://www.weizmann.ac.il/zemed/gillis
|
|
| ITA
| Italy
| Massimo Gobbino <>
| http://olimpiadi.dm.unibo.it/
|
|
| CIV
| Ivory Coast
| Adama Coulibaly <>
|
|
|
| JAM
| Jamaica
| Raymond McEachin <>
|
|
|
| JPN
| Japan
| 森田康夫 <>
| http://www.imojp.org
| 2003, 2023
|
| KAZ
| Kazakhstan
| Akzhol Boranbay <>
|
| 2010
|
| KEN
| Kenya
| James Kiwanuka Katende <>
| http://kkmo-official.com
|
|
| PRK
| Democratic People's Republic of Korea
| GI CHAN KIM <>
|
|
|
| KOR
| Republic of Korea
| Prof. Yongjin Song <>
| https://www.kmo.or.kr
| 2000
|
| KSV
| Kosovo
| Armend Shabani <>
| http://www.kms-ks.org
|
|
| KWT
| Kuwait
| Adnan Abdulmuhsen <>
|
|
|
| KGZ
| Kyrgyzstan
| Ishmatov Makhamadkhan <>
|
|
|
| LAO
| Laos
| Sackmone Sirisack <>
|
|
|
| LVA
| Latvia
| Maruta Avotiņa <>
| http://nms.lu.lv
|
|
| LIE
| Liechtenstein
| Arnaud Maret <>
| https://mathematical.olympiad.ch/en/
|
|
| LTU
| Lithuania
| Artūras Dubickas <>
| http://mif.vu.lt/matematikos-olimpiados/
|
|
| LUX
| Luxembourg
| Mike Dostert <>
|
|
|
| MAC
| Macau
| Ieng Tak Long <>
|
|
|
| MDG
| Madagascar
| Fanja Rakotondrajao <>
|
|
|
| MAS
| Malaysia
| M. Suhaimi Ramly <>
| https://imo-malaysia.org/
|
|
| MRT
| Mauritania
| Horma Ould HAMOUD <>
| https://maurimath.net/Olympiades.php
|
|
| MEX
| Mexico
| Rogelio Valdez Delgado <>
| http://www.ommenlinea.org
| 2005
|
| MDA
| Republic of Moldova
| Anatolie Topala <>
|
|
|
| MNG
| Mongolia
| Otgonbayar Uuye <>
| http://www.mmo.mn
|
|
| MNE
| Montenegro
| Tatjana Vujosevic <>
|
|
|
| MAR
| Morocco
| ASENSOUYIS Hassan <>
|
|
|
| MOZ
| Mozambique
| Luis de Nascimento Paulo <>
|
|
|
| MMR
| Myanmar
| Nyunt Swe <>
|
|
|
| NPL
| Nepal
| Bhadra Man Tuladhar <>
|
|
|
| NLD
| Netherlands
| Quintijn Puite <>
| http://wiskundeolympiade.nl/
| 2011
|
| NZL
| New Zealand
| Ross Atkins <>
| https://www.mathsolympiad.org.nz
|
|
| NIC
| Nicaragua
| Hank de Jesús Espinoza Serrano <>
| http://www.asjtnic.org/
|
|
| NGA
| Nigeria
| Promise Mebine <>
| http://www.nmcabuja.org
|
|
| MKD
| North Macedonia
| Gjorgji Markoski <>
| https://smm.org.mk/
|
|
| NOR
| Norway
| Dag Wessel-Berg <>
| https://www.abelkonkurransen.no
| 2022
|
| OMN
| Oman
| Maya Al Azri <>
|
|
|
| PAK
| Pakistan
| Sarfraz Ahmad <>
|
|
|
| PSE
| Palestine
| Samed Alhajajla <>
| https://meshka.space
|
|
| PAN
| Panama
| Pedro A. Marrone G. <>
| http://www.opm.org.pa/
|
|
| PAR
| Paraguay
| Gabriela Gómez Pasquali <>
| http://www.omapa.org.py
|
|
| PER
| Peru
| Comisión de Olimpiadas de la Sociedad Matemática Peruana <>
| https://selectivos-peru.blogspot.com/
|
|
| PHI
| Philippines
| Christian Paul O. Chan Shio <>
| http://pmo.ph
|
|
| POL
| Poland
| Andrzej Grzesik <>
| http://om.mimuw.edu.pl/
| 1963, 1972, 1986
|
| POR
| Portugal
| Joana Teles <>
| http://www.spm.pt/olimpiadas
|
|
| PRI
| Puerto Rico
| Luis F. Cáceres <>
| http://om.pr
|
|
| ROU
| Romania
| Cătălin Gherghe <>
| http://rms.unibuc.ro
| 1959, 1960, 1969, 1978, 1999,
2018
|
| RUS
| Russian Federation
| Kirill Sukhov <>
| http://math.rosolymp.ru/
| 1992, 2020, 2021
|
| RWA
| Rwanda
| Arun Shanmuganathan <>
| https://rwandamatholympiad.com
|
|
| SLV
| El Salvador
| Gabriel Alexander Chicas Reyes <>
| https://www.jovenestalento.edu.sv/
|
|
| SAU
| Saudi Arabia
| Sultan Saud Albarakati <>
| https://www.mawhiba.org
|
|
| SEN
| Senegal
| Samba Dabo <>
|
|
|
| SRB
| Serbia
| Miljan Knežević <>
| https://dms.rs/
|
|
| SCG
| Serbia and Montenegro
|
|
|
|
| SGP
| Singapore
| Low Fook Hong <>
| http://sms.math.nus.edu.sg/
|
|
| SVK
| Slovakia
| Stanislav Krajči <>
| http://skmo.sk
|
|
| SVN
| Slovenia
| Gregor Dolinar <>
| http://www.dmfa.si/
| 2006
|
| SAF
| South Africa
| Johan Meyer <>
| http://www.samf.ac.za
| 2014
|
| ESP
| Spain
| María Gaspar <>
| http://platea.pntic.mec.es/~csanchez/olimmain.htm
| 2008
|
| LKA
| Sri Lanka
| Chanakya J. Wijeratne <>
| http://www.slmathsolympiad.org/
|
|
| SWE
| Sweden
| Jana Madjarova <>
| http://www.mattetavling.se
| 1991
|
| SUI
| Switzerland
| Arnaud Maret <>
| https://mathematical.olympiad.ch/en/
|
|
| SYR
| Syria
| Hala Al Dakkak <>
| https://dca-net.org/
|
|
| TWN
| Taiwan
| John Meng-Kai Hong <>
| https://ncu.edu.tw/tmo/
| 1998
|
| TJK
| Tajikistan
| Umed Karimov <>
|
|
|
| TZA
| Tanzania
| Ertugrul Tarhan <>
|
|
|
| THA
| Thailand
| Sukit Limpijumnong <>
|
| 2015
|
| TTO
| Trinidad and Tobago
| Indra Haraksingh <>
|
|
|
| TUN
| Tunisia
| Taoufik Charrada <>
|
|
|
| TUR
| Turkey
| Azer Kerimov <>
| https://bilimolimpiyatlari.tubitak.gov.tr/tr
| 1993
|
| NCY
| Turkish Republic of Northern Cyprus
|
|
|
|
| TKM
| Turkmenistan
| Arslan Hojiyev <>
|
|
|
| UGA
| Uganda
| Mirumbe Ismail <>
|
|
|
| UKR
| Ukraine
| Bogdan Rublov <>
| http://matholymp.com.ua/
|
|
| UAE
| United Arab Emirates
| Abdallah El Marhoune <>
| http://competitions.ae/masterminds/
|
|
| UNK
| United Kingdom
| Geoff Smith <>
| http://www.bmoc.maths.org/
| 1979, 2002, 2019, 2024
|
| USA
| United States of America
| Jennifer Barton <>
| http://amc.maa.org
| 1981, 2001
|
| URY
| Uruguay
| Nelson Chocca <>
| http://com-partidauruguay.weebly.com/
|
|
| USS
| Union of Soviet Socialist Republics
|
|
| 1964, 1968, 1973
|
| UZB
| Uzbekistan
| Utkir Boltaev <>
| http://olympiad.uzedu.uz
|
|
| VEN
| Venezuela
| Rafael Sánchez <>
| https://www.acmven.org
|
|
| VNM
| Vietnam
| Le Anh Vinh <>
|
| 2007
|
| YEM
| Yemen
| Munaf Abood <>
|
|
|
| YUG
| Yugoslavia
|
|
| 1967, 1977
|
| ZWE
| Zimbabwe
| A Stewart <>
|
|
|
* 'Country' refers to a country or in some exceptional cases to a territory/geographical region.
