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
Romania	Contests and Olympiads in Romania	Mathematics	Romanian
Russia	Sharygin Geometry Olympiad 2007-2017 w/ Solutions (English) Oral Sharygin Geometry Olympiad w/ Solutions (Russian) All Russian MO (Russian) Moscow Olympiad w/ Solutions (Russian)	Science (Math, Comp. Sci., Phys., Chem., Bio., Geo., Astro.) Language (RU, EN, DE, FR, SP, IT, CH) Art, Literature, History,...	English Russian
Spain	Spain Mathematical Olympiad Problems w/ Solutions	Mathematics	Spanish
USA	Competition Subject AIME Mathematics AMC 8 Mathematics AMC 10 Mathematics AMC 12/AHSME Mathematics	Mathematics Physics	English