Sponsored by Polymarket US. This page quotes Polymarket US's published rules. It is information, not a recommendation to trade.
The rule, quoted
Rule 3.1 of the US Rulebook (2026.09.30).pdf) sets the eligibility criteria for participants. Under 3.1(c), an individual must represent to the company that they:
> "is at least 18 years of age and has attained the age of majority in their state and/or country of residence"
The same rule lists other conditions, such as not being subject to a statutory disqualification under the Commodity Exchange Act. The age line is the first.
Two conditions, not one
The Rulebook asks for both: 18 or older, and the age of majority in your state or country of residence. Where the age of majority in your state is higher than 18, that higher age is the one that counts.
What sign-up asks for
Polymarket US verifies identity when you open an account. Its sign-up guide asks for your date of birth, phone number, legal name, residential address and Social Security number.
Where it's available
Age is one condition and location is another. Polymarket US isn't available in every state, and some states have restrictions on sports markets. Our Polymarket US state-by-state page lists where it's available, from Polymarket US's own written notices. For the app itself, see the Polymarket App, and for what to enter at sign-up, our Polymarket US referral code page.
18+ Only. Restrictions and eligibility requirements apply. Not available in all jurisdictions. Trading is risky. 100% loss can occur. See https://polymarketexchange.com/files/legal/Polymarket%20US%20Rulebook%20(2026.09.30).pdf for more information. The Polymarket US App serves as an independent software provider and affiliate of Polymarket US and Polymarket Clearing, the CFTC-regulated exchange and clearing organization.