The premier algorithmic coding competition for high school students in the US, used to select the IOI team.
- Location
- Online
- Duration
- 4 weekends per year
- Deadline
- January 15
- Grades
- 9, 10, 11, 12
Interests
Track your application
Last verified Jun 15, 2026
§ Similar opportunities
ACSL
American Computer Science League (ACSL)
A multi-division computer science competition covering both theory and programming.
UKMT
British Informatics Olympiad (Open to Int'l)
Solve complex math and computer science problems created by the UK Mathematical Trust.
DoD / National Science Teaching Assoc
JSHS
Junior Science and Humanities Symposium. Regional and national competitions in original STEM research, with cash awards and DoD lab tours.
Purple Comet! Math Meet
Online Math Team Championship (OMTC) / Purple Comet!
An international online math competition focused on high-level problem solving, often allowing students from rural areas to compete.