Are Prediction Markets Legal in Wisconsin?

Last updated August 16, 2026. Snapshot — not legal advice.

As of August 16, 2026, the legality of prediction markets in Wisconsin is unresolved — litigation is ongoing with no final ruling yet.

Prediction markets in Wisconsin

Contested on two fronts — mixed signals
The Attorney General sued Kalshi (~April 2026) and the CFTC countersued the state. Separately, on the Ho-Chunk Nation’s IGRA suit (Ho-Chunk Nation v. Kalshi) a federal judge found the tribe likely to succeed but denied a preliminary injunction (May 2026), with trial set for May 2027.

Litigation affecting Wisconsin

Ho-Chunk Nation v. Kalshi, Inc.The court found the tribe likely to succeed on IGRA but denied a preliminary injunction (May 2026); trial set for May 2027.
IGRA claim advancing; PI denied; trial 2027
State of Wisconsin v. Kalshi, Inc.Wisconsin’s AG sued Kalshi (~April 2026), prompting a CFTC countersuit against the state.
Pending
United States v. State of WisconsinThe CFTC (with the DOJ) sued Wisconsin (April 2026) in response to the state’s enforcement against Kalshi.
Pending

Sports betting & gambling in Wisconsin

Legal — Retail Only

Sports betting only at tribal casinos under amended Class III compacts (first live November 2021); no state online market The market is regulated by the Wisconsin Division of Gaming (Department of Administration; tribal via compacts). Tribal gaming: Significant (tribal-only market; relevant to IGRA).

The federal-vs-state fight

Every entry in this fight turns on the same question: does a prediction-market platform's federal regulation by the CFTC preempt a state's gambling law, or does the state retain authority to restrict it? Courts around the country are answering that question differently — sometimes for the platform, sometimes for the state — and almost every ruling so far is preliminary and under appeal. Treat this page as a snapshot, not a final word.

This page is informational, not legal advice. Nearly every litigation entry referenced here is a preliminary ruling under appeal. Always verify a platform's current, location-specific eligibility directly with the venue before relying on this page.