International Mathematical Olympiad
The oldest and most prestigious mathematical competition for high school students
70 Editions
2025 Latest
41+ Host Countries
This site is an unofficial mirror of the official IMO website. All data is sourced from imo-official.org and is provided here as a fast, static archive. For authoritative information, please visit the official site.
Timeline
Browse every IMO from 1959 to present. Host cities, dates, and participation statistics.
Countries
Explore participating nations, their contact information, and hosting history.
Results
Comprehensive results by country and year. Medal counts, rankings, and statistics.
Hall of Fame
Top performers across all IMOs. Gold medalists, perfect scorers, and record holders.