Olympiad Archive

Here is a list of links to High School and College National Olympiads and Competitions on Science (mainly Mathematics) all over the world, in different languages.

National Olympiads/Competitions

Competitions:

Country	Olympiad Description and Link	Subject	Language
Argentina	Full Archive of Mathematical Olympiad Problems	Mathematics	Spanish
Canada	Canadian Mathematical Olympiad w/ Solutions Canadian Open Mathematics Challenge Other Canadian Competitions	Mathematics	English
India	All Indian National Olympiad Problems w/ Solutions	Astronomy Biology Checmistry Junior Science Mathematics Physics	English
Iran	Iranian National Olympiad Problems w/ Solutions (Farsi) Iranian Geometry Olympiad Problems w/ Solutions (English)	Mathematics	English, Farsi