IMO

Country Gold in Last 10 Contests (updated till 2023)
China 51
United States 46
South Korea 38
Russia 30
Hungary 9

IPhO

Rank Country Gold Silver Bronze Total Honorable mentions Gold in Last 10 Contests (updated till 2023)
1 China 146 21 9 176 2 50
2 South Korea 88 27 24 139 7 47
4 Taiwan 80 34 18 132 8 35
3 Russia 82 46 10 138 4 33
5 United States 78 51 29 158 11 32