You can learn more about this competition on the USABO website.

Participating schools and their students may register for the competition on the USABO website.

If your school will not be participating and you would like to participate in the competition, you may contact the USABO as an individual to request a Host School.

You are at the right place! Please see this document for guidance.

The official USABO Exams will take place February through July 2025. You will find a complete schedule of events for this competition on the USABO 2025 Calendar.

AoPS is hosting these competitions online in 2025 as a courtesy to our community and friends at Center for Excellence in Education. AoPS staff are not involved in the development of content for any of these competitions. All official competitions will be received by AoPS staff shortly before the competition (at most 10 days before the competition start date) and securely handled by only essential contest administration staff and not made available to any other AoPS staff, particularly those who may be in contact with students or coaches.

The AoPS Contest Platform supports recent versions of the main modern web browsers (Google Chrome, Mozilla Firefox, Apple Safari, and Microsoft Edge) and operating systems (Windows, Mac OS, iOS, Chrome OS, and Android). For all students, we'd highly recommend that you try the practice contest to confirm that you will have no issues taking the contest with your device, browser, and internet connection. If you have technical difficulties taking the practice contest, please contact us at info+contests@artofproblemsolving.com.

First, check out the USABO FAQs on the USABO website. If your question isn't answered there, please reach out to us at info+contests@artofproblemsolving.com.