United States of America Mathematical Olympiad (USAMO) vs International Mathematical Olympiad

Comparing two elite STEM opportunities. Both are olympiads for high school students.

United States of America Mathematical Olympiad (USAMO) International Mathematical Olympiad
Prestige Tier Tier 1 — Elite Tier 1 — Elite
Type Olympiad Olympiad
Organization Mathematical Association of America (MAA) IMO Official
Acceptance Rate Extremely competitive; approximately 0.01-0.1% of high school students worldwide reach IMO. For USA: ~6 students selected from 300,000+ AMC participants annually
Applicants Approximately 5,000-6,000 contestants from 100+ countries compete at IMO annually. USA sends 6 representatives from ~300,000 AMC 10/12 participants
Deadline
Cost to Apply Free Free
US Only No / International No / International
Grades High school students only; typically grades 9-12 (ages 13-19)
College Impact Extremely positive and highly prestigious. IMO medalists (especially gold) are exceptionally rare and highly valued by top universities globally. Impact includes: (1) Gold/Silver medalists essentially...