Home › Is Polymarket legal? › Colorado

Is Polymarket legal in Colorado?

Status as of September 25, 2026 · every line has its source and date · not legal advice

Status at a glance

Kalshi and Polymarket US are reported live in Colorado, including sports. No state action was found.

What has happened in Colorado

No state action involving Polymarket or Kalshi was found in the sources checked.

Good to know

• No Colorado enforcement action, cease-and-desist letter, lawsuit or tribal suit involving Kalshi or Polymarket was found as of 2026-09-25; a CourtListener search of federal dockets in the District of Colorado and the Tenth Circuit found no such case (the only Tenth Circuit Kalshi appeal, No. 26-4100, involves Utah officials). CourtListener RECAP search (Kalshi, KalshiEX, Polymarket, QCX LLC; D. Colo. and 10th Cir.)
• Colorado is not among the nine states the CFTC has sued over prediction markets. CFTC Exercises Emergency Authority to Ensure Market Stability (Release 9281-26)
• The Covers prediction-markets legal timeline has no Colorado entries. Prediction markets timeline (Covers) (news)
• The RotoWire prediction-markets legal timeline has no Colorado entries. Prediction Markets Legal Timeline 2026: States, Courts & Federal Regulation (RotoWire) (news)
• A Colorado General Assembly site search on 2026-09-25 returned no results for Kalshi and no prediction-market or event-contract bill among the top results for those terms. Colorado General Assembly sitewide search
• Colorado's Attorney General joined the 41-attorney-general comment letter urging the CFTC to recognize state authority over sports-related prediction markets. Attorney General Davenport Leads AGs In Urging CFTC to Recognize State Authority Over Sports-Related Prediction Markets
• Colorado Attorney General Philip J. Weiser signed the multistate amicus brief supporting Massachusetts against Kalshi in the Supreme Judicial Court. Brief of Amici Curiae of Nevada, Ohio, 35 Other States, and the District of Columbia Supporting Appellee, Commonwealth v. KalshiEX LLC, No. SJC-13906
• CBS Sports says you must be 21 or older to bet on sports in Colorado (licensed sportsbooks). Colorado Sports Betting 2026: Best CO Sportsbooks and Apps (CBS Sports) (news)

State regulator: Colorado Division of Gaming and Colorado Limited Gaming Control Commission. Named by CBS Sports as Colorado's sports betting regulators; the site returned HTTP 403 or a CloudFront error from this environment on 2026-09-25, so its contents could not be reviewed.

The federal picture

Polymarket US operates as a CFTC-designated contract market after Polymarket bought the CFTC-licensed exchange QCEX; Kalshi has been a designated contract market since 2020. Whether states may still apply their gambling laws to sports event contracts is being decided in the courts:

• 2026-09-25 Pending appellate decisions that could change several states' status: Sixth Circuit (Kalshi v. Ohio, No. 26-3196, and Kalshi v. Tennessee, No. 26-5235; argued 2026-07-30), Fourth Circuit (Kalshi v. Maryland, No. 25-1892; argued 2026-05-07), Second Circuit (Kalshi's New York and Connecticut appeals, Nos. 26-1835 and 26-2239, heard in tandem), Seventh Circuit (CFTC and Kalshi appeals from the Wisconsin injunction denial, No. 26-2636 et al.), Tenth Circuit (Kalshi v. Utah, No. 26-4100). No decision in any of these appeared in the court records checked for this file (CourtListener; indexes can lag PACER by a few days). CourtListener dockets cited in the Ohio, Tennessee, Maryland, New York, Connecticut, Wisconsin and Utah entries
• 2026-09-16 Ninth Circuit (Blue Lake Rancheria v. Kalshi, Inc., No. 25-7504; Murguia, McKeown, Paez; opinion by Judge McKeown) affirmed in part and reversed in part the denial of two California tribes' preliminary-injunction motion, holding the tribes likely to succeed in showing Kalshi's sports event contracts entered from tribal lands are class III gaming offered in violation of IGRA and their gaming procedures; the case was remanded for the remaining injunction factors, so no injunction had issued as of the last docket entry checked. Blue Lake Rancheria v. Kalshi, Inc., No. 25-7504 (9th Cir. Sept. 16, 2026) - published opinion (PDF)
• 2026-09-09 Kalshi petitioned for panel rehearing and rehearing en banc of the Ninth Circuit's 2026-08-28 Nevada decision (KalshiEX, LLC v. Assad, No. 25-7516); Montana's 2026-09-17 enforcement pause is tied to the outcome of that request. KalshiEX, LLC v. Assad, No. 25-7516 (9th Cir.) docket, entry 206 (CourtListener); Joint Stipulation of Dismissal, KalshiEX LLC v. Knudsen (D. Mont.), Doc. 35
• 2026-09-02 New Jersey petitioned the US Supreme Court for certiorari in Flaherty v. KalshiEX, LLC (No. 26-299, docketed 2026-09-08); Kalshi's response deadline was extended to 2026-11-09; an amicus brief was filed 2026-09-22 by the National Council of Legislators from Gaming States. Supreme Court docket No. 26-299
• 2026-08-28 Ninth Circuit (KalshiEX, LLC v. Assad, No. 25-7516; opinion by Judge R. Nelson, with Judges Bade and Lee; Lee concurring) affirmed in part the District of Nevada's order dissolving Kalshi's preliminary injunction, holding the CEA likely does not preempt Nevada gaming law as applied to Kalshi's sports event contracts (which it described as sports bets, not 'swaps'), and remanded for the district court to consider Nevada's challenges to Kalshi's election contracts. Nevada's regulator described the ruling as a 3-0 decision also covering Crypto.com and Robinhood. KalshiEX, LLC v. Assad, No. 25-7516 (9th Cir. Aug. 28, 2026) - published opinion (PDF)

How sure is this page? Confidence: medium. Availability rests on a single current news roundup, and the absence of enforcement is based on docket, timeline and legislature-site checks while the regulator's own site could not be loaded. Researched September 25, 2026; court cases in several states can change the status at any time.

Related: all states · Polymarket US · polymarket.com and the United States · is Kalshi legal in Colorado? (Kalshi View)

Other states

California · Texas · Florida · New York · Pennsylvania · Illinois · Ohio · Georgia · North Carolina · Michigan · New Jersey · Virginia · Washington · Arizona · Massachusetts · Tennessee · Indiana · Maryland · Missouri · Wisconsin · Minnesota · Nevada · Connecticut · Montana · Louisiana · Kentucky · Oregon · Oklahoma · Utah

Frequently asked questions

Is Polymarket legal in Colorado?

As of September 25, 2026: polymarket.com does not let US users open new positions, including in Colorado. Polymarket US, the CFTC-regulated app, is reported available in Colorado according to CBS Sports (September 24, 2026). 0 involving Kalshi are listed below with their sources. This is a dated summary of public sources, not legal advice.

Can I use polymarket.com from Colorado?

Not for new trades. Polymarket's help center lists the United States as a blocked country and its developer documentation lists it as close-only (existing positions can be closed, new ones cannot be opened); US residents are pointed to Polymarket US.

Is Kalshi available in Colorado?

Available; sports contracts available, according to the sources on this page as of September 25, 2026.

Polymarket View is independent and not affiliated with Polymarket or Kalshi. This page summarises public sources; it is not legal advice. Polymarket odds today