Is Polymarket US legal in Missouri?
Yes, today. Polymarket US is available in Missouri, but Missouri has acted over its sports event contracts: state regulators have sent Polymarket US a cease-and-desist letter over them. Polymarket US told us in writing on October 23, 2026 that it is available in every state except Nevada. No order currently blocks access in Missouri; that could change. This page reports what Polymarket US and the state have done; it is not a legal conclusion, and courts are still deciding how state law applies to event contracts.
Verified October 26, 2026
Polymarket US in Missouri, by market class
| Market class | Status | Source | Verified |
|---|---|---|---|
| sports event contracts | Available; state action pending | state regulator | October 26, 2026 |
| election and politics markets | Available | Polymarket US (operator) | October 23, 2026 |
| economics markets | Available | Polymarket US (operator) | October 23, 2026 |
| weather markets | Available | Polymarket US (operator) | October 23, 2026 |
| entertainment markets | Available | Polymarket US (operator) | October 23, 2026 |
Kalshi in Missouri
Kalshi remains available to Missouri traders today as a CFTC-regulated exchange covering sports and many other markets, though the state has sent it a cease-and-desist letter over its sports event contracts. Is Kalshi legal in Missouri? β
Frequently Asked Questions
Is Polymarket US legal in Missouri?
Polymarket US is available in Missouri today. Polymarket US told us in writing on October 23, 2026 that it is available in every state except Nevada. Missouri has acted over its sports event contracts (state regulators have sent Polymarket US a cease-and-desist letter over them), and no order currently blocks access. This page reports what Polymarket US and the state have done; it is not a legal conclusion, and courts are still deciding how state law applies to event contracts.
What can I trade on Polymarket US in Missouri?
All five classes are listed as available: sports event contracts, election and politics markets, economics markets, weather markets, and entertainment markets. The state action concerns sports event contracts.
Is Kalshi available in Missouri?
Kalshi remains available to Missouri traders today as a CFTC-regulated exchange covering sports and many other markets, though the state has sent it a cease-and-desist letter over its sports event contracts.
Can I use Polymarket.com from Missouri?
No. Polymarket.com is the international site and is view-only for US users; US traders use Polymarket US. Where our pages show Polymarket.com data, it carries the label "US Users: Featured Trade Not Available; Informational Use Only."
How old do I have to be to use Polymarket US in Missouri?
18 or older, with identity verification at sign-up.
Not legal advice. This page reports what Polymarket US and Missouri officials have said and done, with the date we last checked each source. Check the Polymarket App for eligibility before you sign up.