Overview
The USA Biology Olympiad (USABO) is a high-school biology competition. It selects the four-student United States team for the International Biology Olympiad (IBO). The USABO site says it serves nearly 12,000 students a year.
Who can take it
Students register through their school's Test Administrator, not on their own. The site states that registration is by students only and parents should not register.
Levels or stages
| Stage | Detail |
|---|---|
| Open Exam | First online round |
| Semifinal Exam | Second online round |
| National Finals | Twenty finalists attend a residential training programme covering advanced biology and laboratory techniques |
| IBO | Four top finalists represent the United States |
Important dates
The 2027 IBO is in Warsaw, Poland, from 18 to 25 July 2027. The registration payment deadline listed for 2027 is 23 October.
Fees
A school pays a registration fee of $125. Returning schools renew each year to receive current ID numbers.
How to apply
A school registers first, and then its students register under the school.
Preparation tips
Review past USABO exams.
Build laboratory and data-analysis skills as well as content knowledge.
Can I register myself?
No. Your school must register and appoint a Test Administrator first.