Partly. Kalshi accepts Washington with a restriction: court order of 13 Aug 2026 covers sports, elections, politics and other categories; Kalshi says it blocked WA customers. Polymarket says it accepts Washington. Kalshi is blocked or heavily restricted in Washington after a King County order (13 Aug 2026) barring its sports, elections, politics and entertainment contracts.
Which platforms accept Washington residents
What the law says
13 AUG 2026AG release of 13 Aug 2026: King County judge's final order bars Kalshi from sports, elections, politics, entertainment wagers in Washington; geofence by 19 Aug and 2 Sep; Court of Appeals denied a stay. atg.wa.gov ↗
20 JUL 2026King County Superior Court granted the Washington AG a preliminary injunction against Kalshi under the Gambling Act and Consumer Protection Act (AG release of 21 Jul 2026 says Monday). atg.wa.gov ↗
27 MAR 2026Washington AG Nick Brown sued Kalshi (Gambling Act and Consumer Protection Act) over its online platform taking bets on sports, elections and other events. atg.wa.gov ↗