Is Polymarket Legal in California?

How is Polymarket legal in California?

Polymarket offers the trading of event contracts, which are officially considered financial derivatives and swaps. This does not fit the definition of gambling, allowing Polymarket to be legal in California. Also, the federal commodities laws that are overseen by the CFTC take precedence over California’s statewide ban on sports betting, making it possible for California residents and visitors to trade contracts on Polymarket.

Why Does California Have No Legal Online Sports Betting?

Dozens of states have made sports betting legal, but California is not one of them. California lawmakers often work closely with the state’s Native American tribes, who have influence when it comes to policy decisions. These tribes own and operate dozens of casinos and fear a loss of business if sports betting were to be legalized in California. Thus, they have used their political influence to prevent California lawmakers from making a serious effort to make sports betting legal.

California residents have also rejected the notion of legal sports betting in the state. In 2022, Californians rejected both Proposition 26 and Proposition 27 on statewide ballots. Proposition 26 would have legalized retail sports betting in Native American casinos, while Proposition 27 would have legalized online sportsbooks. Both measures were defeated by large margins, indicating that a majority of California residents have no interest in legalizing sports betting. Putting a sports betting proposition on the ballot in the future is possible, but the earliest it would happen is 2028. Also, there appears to be no serious traction in favor of online sports betting in California.

Why Has California Sued Polymarket?

The state of California isn’t actively suing Polymarket, although the platform is dealing with legal issues inside the state. For starters, some California residents are among the plaintiffs in a federal class-action lawsuit against Polymarket and similar event trading platforms. 

There are also two California-based Native American tribes suing Polymarket and a similar prediction platform. The tribes are claiming that futures trading on sporting events is akin to sports betting, which violates the Indian Gaming Regulatory Act, which gives the tribes exclusive gaming rights in the state of California. In September 2026, the Ninth Circuit ruled in favor of the Native American tribes, meaning Polymarket can’t be used on tribal lands. However, Polymarket continues to operate legally throughout California outside of Native American territory.

Is Polymarket Safe to Use in California?

Since it is federally regulated by the CFTC, Polymarket is safe to use in California. It’s perfectly legal for both California residents and visitors, as long as they are not on Native American tribe lands. Also, Polymarket uses encryption software and blockchain technology to secure all personal data shared on the platform. Just keep in mind that responsible risk management should be practiced while trading contracts on Polymarket.

If you want to learn more, check out our Polymarket review.

What Happens to My Open Positions if California Bans Polymarket?

If California were to suddenly ban Polymarket, it would prevent anyone in the state from trading new contracts. However, all existing contracts would be allowed to reach their natural conclusion. States banning trading sites like Polymarket can get messy, but being federally regulated helps to protect users.

Typically, even if no new contracts are possible, open contracts can be held until the event ends and the market closes. In some cases, a sudden shutdown will mean forced liquidation of open positions. While rare, if this were to happen, users would either be refunded the original price of their open contract or receive the current market value of that contract. Either way, they would not lose the funds used to purchase those contracts.

How Polymarket Works: Event Contracts Explained

As explained in our prediction market learning guides, all event contracts at Polymarket are based on “yes or no” outcomes of real-world events. For instance, for a sporting event, you would decide “yes or no” on whether a specific team will win a game. Both options will have a price between 1¢ and 99¢ attached. The price is tied to the probability of that event based on the market’s perception, meaning the trading of contracts by others for that event can influence the price.

Events priced closer to 99¢ are considered more likely, offering a smaller payout, while the closer to 1¢, the more unlikely that event is to come to fruition, meaning a larger payout. For example, if the “yes” option for an event has a price of 70¢, the market believes it has a 70% probability.

When an event concludes, losing contracts are settled for $0, while winning contracts are settled for $1. The profit is the difference between $1 and the original price of the contract, so a contract purchased for 70¢ will earn a profit of 30¢. Of course, many Polymarket users will purchase multiple 70¢ contracts to increase their potential earnings.

Polymarket vs. Sports Betting: What’s Actually Different

Many people see similarities between Polymarket and traditional sportsbooks. However, we have emphasized some of the key distinctions in the table below:

What Can You Trade in California?

Polymarket offers a wide range of trading options for users in California and every other state. Most notably, there are futures contracts for sports, politics, crypto, weather, tech, culture, and economics.

Sporting markets include games from all over the world in more than a dozen sports. In addition to individual games, there are also markets for player performances and long-term contracts for championship winners.

When it comes to best political betting, the markets at Polymarket include primarily election results from all over the world, as well as other key political events.

Crypto prediction markets revolve mainly around the future price of prominent cryptocurrencies like Bitcoin.

In the weather markets, there are contracts based on the high and low temperatures in prominent cities, as well as specific weather events.

The tech markets at Polymarket relate to the activities of prominent tech companies, as well as key events in the field of technology such as the release of new products.

The culture market offers contracts about the top songs and movies in a given time period, as well as award winners and the results of reality TV shows.

Economics trading markets largely relate to key financial metrics, the net worth of prominent figures, and the CEOs of top companies.

How to Sign Up for Polymarket in California

To sign up for Polymarket in California, follow these simple steps: 

1. Download the Polymarket app on your mobile device or visit the Polymarket website.

2. Use the “Sign up” or “registration” button and share information like your address and phone number to create a new account.

3. Input WSN when prompted for a Polymarket promo code WSN.

4. Verify your identification to create a secure Polymarket account.

5. Deposit at least $10 to fund your account, and the $50 trading bonus will be added to your account balance.

Claim Polymarket Promo Code

Polymarket vs. Other Prediction Markets in California

Aside from Polymarket, several of the best prediction markets for trading are available in California. Each one has unique features that set it apart from the others. If you are looking to maximize your initial capital across these platforms, be sure to check out the latest prediction market bonus offers before signing up. The table below shows how Polymarket’s markets and features compare to similar event trading platforms.

Responsible Risk Management

Whether you’re trading contracts on Polymarket or another platform, it’s always critical to practice responsible risk management. Trading event contracts means risking capital, which should always be done responsibly and after performing proper research. Always be aware of the implied probability of an event and the potential payout of that contract before you make your trade official. At Polymarket, you can place limits on your trading to self-impose guardrails if you need assistance managing risk. At WSN, we are committed to promoting safe trading practices on Polymarket and other trading platforms.