Status as of September 25, 2026 · every line has its source and date · not legal advice
As of September 25, 2026, Kalshi is available in Colorado, and its sports contracts are available, according to CBS Sports (September 24, 2026). No state action involving Kalshi or Polymarket was found in the sources checked. This is a dated summary of public sources, not legal advice.
Status at a glance
Service
Colorado
Kalshi (CFTC-regulated exchange)
Available
Kalshi sports contracts
Available
Polymarket US (for comparison)
Reported available
polymarket.com (international site)
No new trades for US users
Kalshi and Polymarket US are reported live in Colorado, including sports. No state action was found.
No state action involving Kalshi or Polymarket 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.)
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
Kalshi has been a CFTC-designated contract market since November 4, 2020 (CFTC release 8302-20). Whether states may still apply their gambling laws to sports event contracts is being decided in the courts, and the federal appeals courts do not agree yet:
September 25, 2026: 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
September 16, 2026: 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)
September 2, 2026: 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
August 28, 2026: 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 can change the status at any time, so check Kalshi's app before you trade.
As of September 25, 2026, Kalshi is available in Colorado, and its sports contracts are available, according to CBS Sports (September 24, 2026). No state action involving Kalshi or Polymarket was found in the sources checked. This is a dated summary of public sources, not legal advice.
Can I trade sports contracts on Kalshi in Colorado?
Kalshi's sports contracts are available in Colorado according to the sources on this page as of September 25, 2026. State lawsuits and court orders can change that quickly, so check the dated timeline and Kalshi's app.
Is Kalshi regulated?
Yes, federally: the CFTC designated KalshiEX LLC as a contract market on November 4, 2020. States disagree on whether their gambling laws also reach sports event contracts, and federal courts are split, so availability differs by state.