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.

|scope=col||scope=col|Venue|scope=col|Year|class="unsortable" scope=col|Date|scope=col|Top-ranked country|class="unsortable" scope=col|Refs|
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|1959|July 21 – July 31||align=center|||||||||
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|1960|July 18 – July 26||align=center|||||||||
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|1961|July 6 – July 16||align=center|||||||||
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|1962|July 7 – July 15|align=center||||||||||
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|1963|July 5 – July 13||align=center|||||||||
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|1964|June 30 – July 10|align=center||||||||||
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|1965|July 3 – July 13|align=center||||||||||
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|1966|July 1 – July 14|align=center||||||||||
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|1967|July 2 – July 13|align=center||||||||||
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|1968|July 5 – July 18||align=center|||||||||
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|1969|July 5 – July 20||align=center|||||||||
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|1970|July 8 – July 22|align=center||||||||||
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|1971|July 10 – July 21|align=center||||||||||
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|1972|July 5 – July 17||align=center|||||||||
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|1973|July 5 – July 16|align=center||||||||||
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|1974|July 4 – July 17|align=center||||||||||
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|1975|July 3 – July 16||align=center|||||||||
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|1976|July 7 – July 21||align=center|||||||||
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|1977|July 1 – July 13||align=center|||||||||
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|1978|July 3 – July 10||align=center|||||||||
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|1979|June 30 – July 9||align=center|||||||||
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|1981|July 8 – July 20||align=center|||||||||
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|1982|July 5 – July 14||align=center|||||||||
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|1983|July 1 – July 12|align=center||||||||||
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|1984|June 29 – July 10||align=center|||||||||
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|1985|June 29 – July 11||align=center|||||||||
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|1986|July 4 – July 15||align=center|||||||||
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|1987|July 5 – July 16||align=center|||||||||
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|1988|July 9 – July 21||align=center|||||||||
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|1989|July 13 – July 24||align=center|||||||||
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|1990|July 8 – July 19|align=center||||||||||
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|1991|July 12 – July 23||align=center|||||||||
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|1992|July 10 – July 21||align=center|||||||||
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|1993|July 13 – July 24|align=center||||||||||
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|1994|July 8 – July 20||align=center|||||||||
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|1995|July 13 – July 25||align=center|||||||||
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|1996|July 5 – July 17||align=center|||||||||
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|1997|July 18 – July 31||align=center|||||||||
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|1998|July 10 – July 21||align=center|||||||||
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|1999|July 10 – July 22||align=center|||||||||
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|2000|July 13 – July 25||align=center|||||||||
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|2001|July 1 – July 14|align=center||||||||||
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|2002|July 19 – July 30|align=center||||||||||
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|2003|July 7 – July 19||align=center|||||||||
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|2004|July 6 – July 18||align=center|||||||||
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|2005|July 8 – July 19|align=center||||||||||
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|2006|July 6 – July 18|align=center||||||||||
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|2007|July 19 – July 31||align=center|||||||||
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|2008|July 10 – July 22||align=center|||||||||
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|2009|July 10 – July 22|align=center||||||||||
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|2010|July 2 – July 14|align=center||||||||||
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|2011|July 12 – July 24|align=center||||||||||
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|2012|July 4 – July 16||align=center|||||||||
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|2013|July 18 – July 28||align=center|||||||||
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|2014|July 3 – July 13|align=center||||||||||
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|2015|July 4 – July 16||align=center|||||||||
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|2016|July 6 – July 16|align=center||||||||||
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|2017|July 12 – July 23||align=center|||||||||
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|2018|July 3 – July 14||align=center|||||||||
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|2019|July 11 – July 22||align=center|||||||||
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|2020|September 19 – September 28||align=center|||||||||
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|2021|July 7 – July 17|align=center||||||||||
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|2022|July 6 – July 16|align=center||||||||||
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|2023|July 2 – July 13|align=center||||||||||
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|2024|July 11 – July 22||align=center|||||||||
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|2025|July 10 – July 20||align=center|||||||||
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|2026|July 10 – July 20||align=center|||||||||
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## 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