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This forum is open to anyone interested in the U.S. National Chemistry Olympiad (USNCO). Please feel free to share your favorite resources, ask questions of our volunteers, or share comments/suggestions for annotated solution guides in the relevant forums. You only need an ACS ID to login and join the conversation (a member number is not required).

Before you begin, please review these guidelines. ACS does not directly endorse any resources shared here that were not produced by the ACS.

For details of the competition in your local area, such as exam dates and times, contact your coordinator. In the U.S., you can lookup your coordinator here. For U.S. citizens living outside the country, email

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