International Mathematical Olympiad

Timeline

#	Year	Country	City	Date	Countries	Contestants
#	Year	Country	City	Date	Countries	All	M	F
13	1971	Czechoslovakia	Žilina	10.7. - 21.7.	15	115	89	3
5	1963	Poland	Wrocław	5.7. - 13.7.	8	64	53	2
42	2001	United States of America	Washington	1.7. - 14.7.	83	473	440	33
22	1981	United States of America	Washington	8.7. - 20.7.	27	185	155	9
27	1986	Poland	Warsaw	4.7. - 15.7.	37	210	141	7
3	1961	Hungary	Veszprém	6.7. - 16.7.	6	48	34	5
14	1972	Poland	Toruń	5.7. - 17.7.	14	107	90	2
36	1995	Canada	Toronto	13.7. - 25.7.	73	412	288	26
44	2003	Japan	Tokyo	7.7. - 19.7.	82	457	326	29
39	1998	Taiwan	Taipeh	10.7. - 21.7.	76	419	292	30
41	2000	Republic of Korea	Taejon	13.7. - 25.7.	82	461	330	31
8	1966	Bulgaria	Sofia	1.7. - 14.7.	9	72	59	1
2	1960	Romania	Sinaia	18.7. - 26.7.	5	39	32	1
32	1991	Sweden	Sigtuna	12.7. - 23.7.	56	318	259	17
54	2013	Colombia	Santa Marta	18.7. - 28.7.
25	1984	Czechoslovakia	Prague	29.6. - 10.7.	34	192	126	3
24	1983	France	Paris	1.7. - 12.7.	32	186	178	8
37	1996	India	Mumbai	5.7. - 17.7.	75	424	298	25
33	1992	Russian Federation	Moscow	10.7. - 21.7.	56	322	261	12
6	1964	Union of Soviet Socialist Republics	Moscow	30.6. - 10.7.	9	72	54	4
15	1973	Union of Soviet Socialist Republics	Moscow	5.7. - 16.7.	16	125	115	2
10	1968	Union of Soviet Socialist Republics	Moscow	5.7. - 18.7.	12	96	88
46	2005	Mexico	Mérida	8.7. - 19.7.	91	513	470	43
38	1997	Argentina	Mar del Plata	18.7. - 31.7.	82	460	303	28
53	2012	Argentina	Mar del Plata	4.7. - 16.7.	100	548	496	52
49	2008	Spain	Madrid	10.7. - 22.7.	97	535	480	55
21	1979	United Kingdom	London	30.6. - 9.7.	23	166	116	1
47	2006	Slovenia	Ljubljana	6.7. - 18.7.	90	498	460	38
18	1976	Austria	Lienz	7.7. - 21.7.	18	139	117	4
12	1970	Hungary	Keszthely	8.7. - 22.7.	14	112	94	5
26	1985	Finland	Joutsa	29.6. - 11.7.	38	209	147	7
34	1993	Turkey	Istanbul	13.7. - 24.7.	73	413	282	32
35	1994	Hong Kong	Hong Kong	8.7. - 20.7.	69	385	268	25
28	1987	Cuba	Havanna	5.7. - 16.7.	42	237	154	7
48	2007	Vietnam	Hanoi	19.7. - 31.7.	93	520	472	48
43	2002	United Kingdom	Glasgow	19.7. - 30.7.	84	479	333	37
16	1974	German Democratic Republic	Erfurt	4.7. - 17.7.	18	140	124	2
9	1967	Yugoslavia	Cetinje	2.7. - 13.7.	13	99	82	1
4	1962	Czechoslovakia	České Budějovice	7.7. - 15.7.	7	56	48	4
29	1988	Australia	Canberra	9.7. - 21.7.	49	268	251	17
17	1975	Bulgaria	Burgas	3.7. - 16.7.	17	135	99	2
23	1982	Hungary	Budapest	5.7. - 14.7.	30	119	88	2
40	1999	Romania	Bucharest	10.7. - 22.7.	81	450	309	37
11	1969	Romania	Bucharest	5.7. - 20.7.	14	112	95	6
20	1978	Romania	Bucharest	3.7. - 10.7.	17	132	101	3
50	2009	Germany	Bremen	10.7. - 22.7.	104	565	506	59
30	1989	Germany	Braunschweig	13.7. - 24.7.	50	291	200	13
1	1959	Romania	Braşov	21.7. - 31.7.	7	52	41	6
7	1965	German Democratic Republic	Berlin	3.7. - 13.7.	10	80	63	9
19	1977	Yugoslavia	Belgrade	1.7. - 13.7.	21	155	132	2
31	1990	People's Republic of China	Beijing	8.7. - 19.7.	54	308	223	8
45	2004	Greece	Athens	6.7. - 18.7.	85	486	348	37
51	2010	Kazakhstan	Astana	2.7. - 14.7.	97	523	470	47
52	2011	Netherlands	Amsterdam	12.7. - 24.7.	101	564	507	57
58	2017	Brazil
56	2015	Thailand
57	2016	Hong Kong
55	2014	South Africa

Gender of some contestants is not known. Please send relevant information to the webmaster: webmaster@imo-official.org.