Penalti Olimpiad_Matematik_Antarabangsa

Korea Utara telah hilang kelayakan kerana menipu pada IMO ke-32 pada tahun 1991 dan sekali lagi pada IMO ke-51 pada 2010. [10] Ia adalah satu-satunya negara yang dituduh menipu.

VenueYearDateTop-ranked country[11]Refs
1  Brașov and Bucharest1959July 21–31[12] Romania[13]
2  Sinaia1960July 18–26 Czechoslovakia[13]
3  Veszprém1961July 6–16 Hungary[13]
4  České Budějovice1962July 7–15[13]
5  Warsaw and Wrocław1963July 5–13 Soviet Union[13]
6  Moscow1964June 30 – July 10[13]
7  East Berlin1965July 3–13[13]
8  Sofia1966July 1–14[13]
9  Cetinje1967July 2–13[13]
10  Moscow1968July 5–18 East Germany[13]
11  Bucharest1969July 5–20 Hungary[13]
12  Keszthely1970July 8–22[13]
13  Žilina1971July 10–21[13]
14  Toruń1972July 5–17 Soviet Union[13]
15  Moscow1973July 5–16[13]
16  Erfurt and East Berlin1974July 4–17[13]
17  Burgas and Sofia1975July 3–16 Hungary[13]
18  Lienz1976July 7–21 Soviet Union[13]
19  Belgrade1977July 1–13 United States[13]
20  Bucharest1978July 3–10 Romania[13]
21  London1979June 30 – July 9 Soviet Union[13]
 The 1980 IMO was due to be held in Mongolia. It was cancelled, and split into two unofficial events in Europe.[14]
22  Washington, D.C.1981July 8–20 United States[13]
23  Budapest1982July 5–14 West Germany[13]
24  Paris1983July 1–12[13]
25  Prague1984June 29 – July 10 Soviet Union[13]
26  Joutsa1985June 29 – July 11 Romania[13]
27  Warsaw1986July 4–15 Soviet Union

 United States		[13]
28  Havana1987July 5–16 Romania[13]
29  Sydney and Canberra1988July 9–21 Soviet Union[13]
30  Braunschweig1989July 13–24 China[13]
31  Beijing1990July 8–19[13]
32  Sigtuna1991July 12–23 Soviet Union[13]
33  Moscow1992July 10–21 China[13]
34  Istanbul1993July 13–24[13]
35  Hong Kong1994July 8–20 United States[13]
36  Toronto1995July 13–25 China[15]
37  Mumbai1996July 5–17 Romania[16]
38  Mar del Plata1997July 18–31 China[17]
39  Taipei1998July 10–21 Iran[18]
40  Bucharest1999July 10–22 China

 Russia		[19]
41  Daejeon2000July 13–25 China[20]
42  Washington, D.C.2001July 1–14[21]
43  Glasgow2002July 19–30[22]
44  Tokyo2003July 7–19 Bulgaria[23]
45  Athens2004July 6–18 China[24]
46  Mérida2005July 8–19[25]
47  Ljubljana2006July 6–18[26]
48  Hanoi2007July 19–31 Russia[27]
49  Madrid2008July 10–22 China[28]
50  Bremen2009July 10–22[29]
51  Astana2010July 2–14[30]
52  Amsterdam2011July 12–24[31]
53  Mar del Plata2012July 4–16 South Korea[32]
54  Santa Marta2013July 18–28 China[33]
55  Cape Town2014July 3–13[34]
56  Chiang Mai2015July 4–16 United States[35]
57  Hong Kong2016July 6–16[36]
58  Rio de Janeiro2017July 12–23 South Korea[37]
59  Cluj-Napoca2018July 3–14 United States[38]
60  Bath2019July 11–22 China

 United States		[39]
61  Saint Petersburg (online)2020September 19–28 China[40][41][42]
62  Saint Petersburg (online)2021July 7–17[43]
63  Oslo2022July 6–16[44]
64  Chiba2023July 2–13[45]
65  Bath2024July 11–22[46][47]
66  Melbourne2025[48]