International Mathematical Olympiad

The International Mathematical Olympiad (IMO) is a six-question two-day math competition for students that have not yet gone to college and are under 20 years old. Any country may take part in it by sending a team of six students to compete.
History
The IMO has been held every year since 1959. It takes place in a different country (which is called the "host country") from year to year. However, it is often seen that this competition is dominated by the US and China.

  Venue Year Date Top-ranked country Refs 1  Brașov and Bucharest1959 July 21 – July 31  2  Sinaia1960 July 18 – July 26  3   Veszprém1961 July 6 – July 16 4   1962 July 7 – July 15 5  Warsaw and Wrocław1963 July 5 – July 13 6  Moscow1964 June 30 – July 10 7  East Berlin1965 July 3 – July 13 8  Sofia1966 July 1 – July 14 9  Cetinje1967 July 2 – July 13 10  Moscow1968 July 5 – July 18 11  Bucharest1969 July 5 – July 20 12  Keszthely1970 July 8 – July 22 13  Žilina1971 July 10 – July 21 14  Toruń1972 July 5 – July 17 15  Moscow1973 July 5 – July 16 16  Erfurt and East Berlin1974 July 4 – July 17 17  Burgas and Sofia1975 July 3 – July 16 18  Lienz1976 July 7 – July 21 19  Belgrade1977 July 1 – July 13 20  Bucharest1978 July 3 – July 10 21  London1979 June 30 – July 9 Unofficial events were held in Finland and Luxembourg in 1980. 22  Washington, D.C.1981 July 8 – July 20 23  Budapest1982 July 5 – July 14 24  Paris1983 July 1 – July 12 25  Prague1984 June 29 – July 10 26  Joutsa1985 June 29 – July 11 27  Warsaw1986 July 4 – July 15 28  Havana1987 July 5 – July 16 29   Sydney and Canberra1988 July 9 – July 21 30  Braunschweig1989 July 13 – July 24 31  Beijing1990 July 8 – July 19 32  Sigtuna1991 July 12 – July 23 33  Moscow1992 July 10 – July 21 34  Istanbul1993 July 13 – July 24 35  Hong Kong1994 July 8 – July 20 36  Toronto1995 July 13 – July 25  37  Mumbai1996 July 5 – July 17  38  Mar del Plata1997 July 18 – July 31  39  Taipei1998 July 10 – July 21  40  Bucharest1999 July 10 – July 22  41  Daejeon2000 July 13 – July 25  42  Washington, D.C.2001 July 1 – July 14  43  Glasgow2002 July 19 – July 30  44  Tokyo2003 July 7 – July 19  45  Athens2004 July 6 – July 18  46  Mérida2005 July 8 – July 19  47  Ljubljana2006 July 6 – July 18  48  Hanoi2007 July 19 – July 31  49  Madrid2008 July 10 – July 22  50  Bremen2009 July 10 – July 22  51  Astana2010 July 2 – July 14  52  Amsterdam2011 July 12 – July 24  53  Mar del Plata2012 July 4 – July 16  54  Santa Marta 2013 July 18 – July 28  55  Cape Town2014  July 3 – July 13  56  Chiang Mai2015  July 4 – July 16   57  Hong Kong2016  July 6 – July 16  58  Rio de Janeiro 2017  July 12 – July 23   59  Cluj-Napoca2018  July 3 – July 14   60  Bath2019  July 11 – July 22   61  Saint Petersburg2020 September 19 – September 28  Becomes a virtual event due to COVID-19 pandemic.62  Saint Petersburg2021 July 7 – July 17 63  Oslo2022 July 6 – July 16  64  Chiba2023 July 2 – July 13  65  Bath2024  July 11 – July 22  66  Sunshine Coast2025  July 10 – July 20 67  Shanghai2026  July 10 – July 20 68  Hungary2027   69  Saudi Arabia2028   

Results
The current ten countries with the best all-time results are as follows:
 Rank  Country  Appearances  Gold  Silver  Bronze  Honorable Mentions 1    36  168  36  6   0 2   47  137  117  29  1 3    30  106  62  12  0 4    34  86  74  28   7 5    61  85  168  107  10 6    62  78  149  110  7 7    29  77  67  45  0 8    45  65  111  78  2 9    62  55  123  114  13 10    44  53  105  83  16

References

Notes

Category:Mathematics competitions
Category:International competitions