International Mathematical Olympiad

File:IMO logo.svg

The logo of the 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 Bucharest	1959	July 21 – July 31	Romania
2	Sinaia	1960	July 18 – July 26	Czechoslovakia
3	Veszprém	1961	July 6 – July 16	Hungary
4	České Budějovice	1962	July 7 – July 15
5	Warsaw and Wrocław	1963	July 5 – July 13	Soviet Union
6	Moscow	1964	June 30 – July 10
7	East Berlin	1965	July 3 – July 13
8	Sofia	1966	July 1 – July 14
9	Cetinje	1967	July 2 – July 13
10	Moscow	1968	July 5 – July 18	East Germany
11	Bucharest	1969	July 5 – July 20	Hungary
12	Keszthely	1970	July 8 – July 22
13	Žilina	1971	July 10 – July 21
14	Toruń	1972	July 5 – July 17	Soviet Union
15	Moscow	1973	July 5 – July 16
16	Erfurt and East Berlin	1974	July 4 – July 17
17	Burgas and Sofia	1975	July 3 – July 16	Hungary
18	Lienz	1976	July 7 – July 21	Soviet Union
19	Belgrade	1977	July 1 – July 13	United States
20	Bucharest	1978	July 3 – July 10	Romania
21	London	1979	June 30 – July 9	Soviet Union
	The 1980 IMO was due to be held in Mongolia. It was cancelled, and split into two unofficial events in Europe.
22	Washington, D.C.	1981	July 8 – July 20	United States
23	Budapest	1982	July 5 – July 14	West Germany
24	Paris	1983	July 1 – July 12
25	Prague	1984	June 29 – July 10	Soviet Union
26	Joutsa	1985	June 29 – July 11	Romania
27	Warsaw	1986	July 4 – July 15	Soviet Union United States
28	Havana	1987	July 5 – July 16	Romania
29	Sydney and Canberra	1988	July 9 – July 21	Soviet Union
30	Braunschweig	1989	July 13 – July 24	China
31	Beijing	1990	July 8 – July 19
32	Sigtuna	1991	July 12 – July 23	Soviet Union
33	Moscow	1992	July 10 – July 21	China
34	Istanbul	1993	July 13 – July 24
35	Hong Kong	1994	July 8 – July 20	United States
36	Toronto	1995	July 13 – July 25	China
37	Mumbai	1996	July 5 – July 17	Romania
38	Mar del Plata	1997	July 18 – July 31	China
39	Taipei	1998	July 10 – July 21	Iran
40	Bucharest	1999	July 10 – July 22	China Russia
41	Daejeon	2000	July 13 – July 25	China
42	Washington, D.C.	2001	July 1 – July 14
43	Glasgow	2002	July 19 – July 30
44	Tokyo	2003	July 7 – July 19	Bulgaria
45	Athens	2004	July 6 – July 18	China
46	Mérida	2005	July 8 – July 19
47	Ljubljana	2006	July 6 – July 18
48	Hanoi	2007	July 19 – July 31	Russia
49	Madrid	2008	July 10 – July 22	China
50	Bremen	2009	July 10 – July 22
51	Astana	2010	July 2 – July 14
52	Amsterdam	2011	July 12 – July 24
53	Mar del Plata	2012	July 4 – July 16	South Korea
54	Santa Marta	2013	July 18 – July 28	China
55	Cape Town	2014	July 3 – July 13
56	Chiang Mai	2015	July 4 – July 16	United States
57	Hong Kong	2016	July 6 – July 16
58	Rio de Janeiro	2017	July 12 – July 23	South Korea
59	Cluj-Napoca	2018	July 3 – July 14	United States
60	Bath	2019	July 11 – July 22	China United States
61	Saint Petersburg	2020	September 19 – September 28	China
62	Saint Petersburg	2021	July 7 – July 17
63	Oslo	2022	July 6 – July 16
64	Chiba	2023	July 2 – July 13
65	Bath	2024	July 11 – July 22	United States
66	Sunshine Coast	2025	July 10 – July 20
67	Shanghai	2026
68	Hungary	2027
69	Saudi Arabia	2028

Results

The current ten countries with the best all-time results are as follows:

Rank	Country	Appearances	Gold	Silver	Bronze	Honorable Mentions
1	China	36	168	36	6	0
2	United States	47	137	117	29	1
3	Russia	30	106	62	12	0
4	South Korea	34	86	74	28	7
5	Hungary	61	85	168	107	10
6	Romania	62	78	149	110	7
7	Soviet Union	29	77	67	45	0
8	Vietnam	45	65	111	78	2
9	Bulgaria	62	55	123	114	13
10	Germany	44	53	105	83	16

References

Notes