CA · Polymarket US · Checked Oct. 21, 2026
Is Polymarket US legal in California?
The short answer
Polymarket US does not publish a list of states where it is unavailable, and we found no court order, regulator action or Polymarket US notice that stops it from serving California as of Oct. 22, 2026.
We found no public action by California officials against Polymarket US or any other prediction market.
Federal appeals from California go to the Ninth Circuit, which ruled for the states on Aug. 28, 2026.
Availability: Polymarket App Terms & Conditions (ISV Front End), effective October 22, 2026 (embedded at polymarket.us/tos), checked Oct. 22, 2026. A summary of public actions, not legal advice.
Cite this page
Bluebook
Is Polymarket US Legal in California?, Prediction Market Laws (last updated Oct. 22, 2026), https://predictionmarketlaws.com/platforms/polymarket/california.
APA
Prediction Market Laws. (2026, October 22). Is Polymarket US Legal in California?. https://predictionmarketlaws.com/platforms/polymarket/california
What California has done about Polymarket US
No public action by California names Polymarket US. California has taken 6 other actions on prediction markets: see prediction market law in California.
Court cases
We track no case between Polymarket US and California.
The legal backdrop in California
- State status
- No public action foundWe found no public enforcement, litigation or enacted law. Pending bills may still be listed on the state's page.
- Online sports betting
- Not legalNo legal sports betting; LSR lists California among states without it.
- Federal appeals court
- Ninth CircuitRuled for the states.
- Who regulates
- California Attorney General (Department of Justice); California Gambling Control Commission
- Laws and bills
- 3 on record
Using Polymarket US in California
- Minimum age
- 18
- Identity checks
- Polymarket US requires date of birth, a phone number confirmed by text code, legal name, residential address and Social Security number. Most users are verified automatically; others may be asked for a government-issued ID and a selfie check. KYC must be completed before depositing or trading, and the terms require KYC, AML and sanctions screening. Source
Other platforms in California
- KalshiNo restriction found
- Polymarket USNo restriction found
- Gemini PredictionsNo restriction found
- RobinhoodNo restriction found
- Crypto.comNo restriction found
- CoinbaseNo restriction found
- WebullNo restriction found
- DraftKings PredictionsOffered
- FanDuel PredictsOffered
- UnderdogOffered
- PrizePicksOffered
- Fanatics MarketsOffered
Questions people ask
- Is Polymarket US legal in California?
- Polymarket US does not publish a list of states where it is unavailable, and we found no court order, regulator action or Polymarket US notice that stops it from serving California as of Oct. 22, 2026. We found no public action by California officials against Polymarket US or any other prediction market. This summarises public actions; it is not legal advice.
- Has California sued Polymarket US or ordered it to stop?
- Not that we have found. We have no cease-and-desist letter, state lawsuit, court order or settlement in California that names Polymarket US, as of Oct. 21, 2026.
- How old do you have to be to use Polymarket US in California?
- 18. That is Polymarket US's minimum age, and it lists no different rule for California.
- Is sports betting legal in California?
- Not legal. No legal sports betting; LSR lists California among states without it.
- Which court will decide whether California can regulate Polymarket US?
- Federal appeals from California go to the Ninth Circuit, which ruled for the states on Aug. 28, 2026. 3 petitions now ask the U.S. Supreme Court to settle the question nationally.