USEMO 2026 Directed by Anant Mudgal

US Ersatz Math Olympiad.

A proof-based mathematics competition open to all middle and high school students, designed to develop interest and ability in mathematics.

Registration closes 4 pm SGT, October 23, 2026

Competition dates October 24 & 25, 2026

Contest structure 2 Separate Contests

Eastern Zone 12:30 PM – 5:00 PM Singapore Time (SGT)

Western Zone 12:30 PM – 5:00 PM Eastern Time (EDT)

Your contest zone will be assigned based on your country of residence. Special requests to compete in the other zone or in both zones may be permitted.

2 Days 3 Problems / Day 4.5 Hours / Day Proof-Based

Official USEMO Website

Register for USEMO 2026

Please enter all details carefully. The contestant name should be entered exactly as it should appear on the certificate. The registered email will be used as the main point of contact.

We will email all registered participants with instructions for accessing the USEMO submissions portal by 5:00 pm SGT on 23 October 2026 or earlier.

Official USEMO Website

USEMO 2026Directed by Anant Mudgal

October 24–25, 2026

US Ersatz Math Olympiad.

A two-day, proof-based mathematics competition for middle and high school students, designed to develop mathematical interest, reasoning, and problem-solving ability.

Competition datesOctober 24 & 25

Separate contestsEastern & Western

Competition format3 problems / day

2 days4.5 hours / dayProof-based

Registration updateRegistration closed

Registration for USEMO 2026 is now closed.

Thank you for your interest. Registered participants should refer to their assigned contest zone and the schedule below. Question papers will be provided on this page at the designated release times.

Important — Onboarding emails sent. All registered candidates have been emailed their exam login credentials. If you have not received yours, please check your spam or junk folder and contact us at usemo2026@mathelots.global