Has South Dakota sued Polymarket US or ordered it to stop?

Not that we have found. We have no cease-and-desist letter, state lawsuit, court order or settlement in South Dakota that names Polymarket US, as of Oct. 21, 2026.

How old do you have to be to use Polymarket US in South Dakota?

18. That is Polymarket US's minimum age, and it lists no different rule for South Dakota.

Is sports betting legal in South Dakota?

Retail only. Sports betting only at Deadwood casinos and tribal venues; SJR 504 for a mobile betting ballot measure was deferred in a House committee in Feb 2026.

Which court will decide whether South Dakota can regulate Polymarket US?

Federal appeals from South Dakota go to the Eighth Circuit, where an appeal on the question is pending. 3 petitions now ask the U.S. Supreme Court to settle the question nationally.

SD · Polymarket US · Checked Oct. 21, 2026

Is Polymarket US legal in South Dakota?

No restriction found South Dakota: No public action found

The short answer

Polymarket US does not publish a list of states where it is unavailable, and we found no court order, regulator action or Polymarket US notice that stops it from serving South Dakota as of Oct. 22, 2026.

We found no public action by South Dakota officials against Polymarket US or any other prediction market.

Federal appeals from South Dakota go to the Eighth Circuit, where an appeal on the question is pending.

Availability: Polymarket App Terms & Conditions (ISV Front End), effective October 22, 2026 (embedded at polymarket.us/tos), checked Oct. 22, 2026. A summary of public actions, not legal advice.

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Cite this page

Bluebook

Is Polymarket US Legal in South Dakota?, Prediction Market Laws (last updated Oct. 22, 2026), https://predictionmarketlaws.com/platforms/polymarket/south-dakota.

APA

Prediction Market Laws. (2026, October 22). Is Polymarket US Legal in South Dakota?. https://predictionmarketlaws.com/platforms/polymarket/south-dakota

What South Dakota has done about Polymarket US

No public action by South Dakota names Polymarket US. South Dakota has taken 1 other action on prediction markets: see prediction market law in South Dakota.

Court cases

We track no case between Polymarket US and South Dakota.

The legal backdrop in South Dakota

State status: No public action foundWe found no public enforcement, litigation or enacted law. Pending bills may still be listed on the state's page.
Online sports betting: Retail onlySports betting only at Deadwood casinos and tribal venues; SJR 504 for a mobile betting ballot measure was deferred in a House committee in Feb 2026.
Federal appeals court: Eighth CircuitAppeal pending.
Who regulates: South Dakota Commission on Gaming; South Dakota Attorney General
Laws and bills: None specific to prediction markets

Using Polymarket US in South Dakota

Minimum age: 18
Identity checks: Polymarket US requires date of birth, a phone number confirmed by text code, legal name, residential address and Social Security number. Most users are verified automatically; others may be asked for a government-issued ID and a selfie check. KYC must be completed before depositing or trading, and the terms require KYC, AML and sanctions screening. Source

Other platforms in South Dakota

KalshiNo restriction found
Polymarket USNo restriction found
Gemini PredictionsNo restriction found
RobinhoodNo restriction found
Crypto.comNo restriction found
CoinbaseNo restriction found
WebullNo restriction found
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Questions people ask

Is Polymarket US legal in South Dakota?: Polymarket US does not publish a list of states where it is unavailable, and we found no court order, regulator action or Polymarket US notice that stops it from serving South Dakota as of Oct. 22, 2026. We found no public action by South Dakota officials against Polymarket US or any other prediction market. This summarises public actions; it is not legal advice.
Has South Dakota sued Polymarket US or ordered it to stop?: Not that we have found. We have no cease-and-desist letter, state lawsuit, court order or settlement in South Dakota that names Polymarket US, as of Oct. 21, 2026.
How old do you have to be to use Polymarket US in South Dakota?: 18. That is Polymarket US's minimum age, and it lists no different rule for South Dakota.
Is sports betting legal in South Dakota?: Retail only. Sports betting only at Deadwood casinos and tribal venues; SJR 504 for a mobile betting ballot measure was deferred in a House committee in Feb 2026.
Which court will decide whether South Dakota can regulate Polymarket US?: Federal appeals from South Dakota go to the Eighth Circuit, where an appeal on the question is pending. 3 petitions now ask the U.S. Supreme Court to settle the question nationally.