Has Washington 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 Washington that names Polymarket US, as of Oct. 21, 2026.

How old do you have to be to use Polymarket US in Washington?

18. That is Polymarket US's minimum age, and it lists no different rule for Washington.

Is sports betting legal in Washington?

Retail only. Sports betting only at tribal casinos (including on-premises mobile wagering on tribal land); no statewide online betting.

Which court will decide whether Washington can regulate Polymarket US?

Federal appeals from Washington 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.

WA · Polymarket US · Checked Oct. 21, 2026

Is Polymarket US legal in Washington?

No restriction found Washington: Court order in force

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 Washington as of Oct. 22, 2026.

Washington has not named Polymarket US in a public action we have found, but it has acted against other prediction markets (court order in force).

Federal appeals from Washington 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.

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Cite this page

Bluebook

Is Polymarket US Legal in Washington?, Prediction Market Laws (last updated Oct. 22, 2026), https://predictionmarketlaws.com/platforms/polymarket/washington.

APA

Prediction Market Laws. (2026, October 22). Is Polymarket US Legal in Washington?. https://predictionmarketlaws.com/platforms/polymarket/washington

What Washington has done about Polymarket US

No public action by Washington names Polymarket US. Washington has taken 15 other actions on prediction markets: see prediction market law in Washington.

Court cases

We track no case between Polymarket US and Washington.

The legal backdrop in Washington

State status: Court order in forceA court order currently bars at least one CFTC-regulated prediction market from offering some contracts, usually sports, to people in the state.
Online sports betting: Retail onlySports betting only at tribal casinos (including on-premises mobile wagering on tribal land); no statewide online betting.
Federal appeals court: Ninth CircuitRuled for the states.
Who regulates: Washington State Gambling Commission; Washington Attorney General
Laws and bills: None specific to prediction markets

Using Polymarket US in Washington

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 Washington

KalshiSports blocked
Polymarket USNo restriction found
Gemini PredictionsNo restriction found
RobinhoodNo restriction found
Crypto.comNo restriction found
CoinbaseNo restriction found
WebullNo restriction found
DraftKings PredictionsSports blocked
FanDuel PredictsOffered
UnderdogOffered
PrizePicksNot offered
Fanatics MarketsNot offered

Questions people ask

Is Polymarket US legal in Washington?: 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 Washington as of Oct. 22, 2026. Washington has not named Polymarket US in a public action we have found, but it has acted against other prediction markets (court order in force). This summarises public actions; it is not legal advice.
Has Washington 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 Washington that names Polymarket US, as of Oct. 21, 2026.
How old do you have to be to use Polymarket US in Washington?: 18. That is Polymarket US's minimum age, and it lists no different rule for Washington.
Is sports betting legal in Washington?: Retail only. Sports betting only at tribal casinos (including on-premises mobile wagering on tribal land); no statewide online betting.
Which court will decide whether Washington can regulate Polymarket US?: Federal appeals from Washington 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.