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Checked Oct. 21, 2026

DC ยท Checked Oct. 21, 2026

Prediction market law in District of Columbia

No public action found

D.C. has not acted against prediction markets locally but joined state amicus briefs urging Supreme Court review of the Kalshi preemption fight.

No cease-and-desist letter, D.C. government lawsuit, or prediction-market legislation was found for the District. D.C.'s attorney general signed the 41-attorney-general comment letter to the CFTC and joined Ohio's October 2026 Supreme Court amicus brief backing New Jersey's petition in Flaherty v. KalshiEX. Consumer class actions against Polymarket have been filed in D.C. Superior Court.

Timeline of state actions

  1. Other development, Kalshi

    The District joined an amicus brief led by Ohio, with 38 other states, urging the Supreme Court to grant New Jersey's petition in Flaherty v. KalshiEX LLC.

    Source: U.S. Supreme Court docket No. 26-299

  2. Other development

    The D.C. attorney general was one of 41 attorneys general on a comment letter asking the CFTC to confirm in rulemaking that it lacks jurisdiction over sports-related event contracts.

    Source: Colorado Attorney General (coalition press release)

Laws and bills

No enacted laws or pending bills specific to prediction markets found.

Court cases

  • National Association of Consumer Advocates v. Adventure One QSS, Inc. (Polymarket; private)D.C. Superior Court, 2026-CAB-004388
  • Moeller v. Blockratize Inc. (Polymarket; private class action)D.C. Superior Court; removed to U.S. District Court, D.D.C., 2026-CAB-004615; 1:26-cv-03083

Sources

  1. Colorado Attorney General (coalition press release)
  2. U.S. Supreme Court docket No. 26-299
  3. Sports betting status