International Mathematical Olympiad vs US Physics Olympiad (USAPhO)

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

International Mathematical Olympiad US Physics Olympiad (USAPhO)
Prestige Tier Tier 1 — Elite Tier 1 — Elite
Type Olympiad Olympiad
Organization IMO Official American Association of Physics Teachers (AAPT)
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 $0
US Only No / International Yes
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...