Sports betting in California: sportsbooks and exchanges available
Updated
None of the 6 sportsbooks SlateProof tracks operates in California. 4 of the 4 exchanges list sports contracts there (Kalshi, Polymarket US, Novig and ProphetX). That counts the ten venues we track, not every licensed operator.
- Tracked sportsbooks
- 0 of 6
- Tracked exchanges
- 4 of 4
- Contested exchanges
- None flagged
- Minimum age
- 18+ to 21+, by venue (see the tables)
- Availability checked
- October 5, 2026
- Next recheck due
- October 16, 2026
- State facts checked
- October 6, 2026
What does California law say about sports betting?
California has no legal sports betting. The Secretary of State's 2022 voter guide said a No vote on online-betting Proposition 27 meant sports betting would continue to be illegal in California. Source: California Secretary of State - 2022 Voter Information Guide, Prop 27, checked October 6, 2026.
- Law and what is pending. California voters rejected both sports betting measures on November 8, 2022: Prop 26 (in-person sports wagering on tribal lands) lost 33.0% to 67.0%, and Prop 27 (online and mobile betting) lost 17.7% to 82.3%. Source: California Secretary of State - Official Declaration of the Vote Results on State Ballot Measures, Nov. 8, 2022, checked October 6, 2026.
- Law and what is pending. In July 2026, California tribal leaders said they still plan a tribally led ballot initiative for online sports betting in 2028. No measure had been filed at that point. Source: Covers, checked October 6, 2026.
From our availability data: No legal sportsbooks. Federally regulated exchanges offer sports contracts here.
Which sportsbooks can I use in California?
None of the 6 tracked sportsbooks operates in California (checked October 5, 2026).
| Sportsbook | Status | Minimum age | What differs in California |
|---|---|---|---|
| DraftKings | Not available | n/a | Not listed in our availability data. |
| FanDuel | Not available | n/a | Not listed in our availability data. |
| BetMGM | Not available | n/a | Not listed in our availability data. |
| Fanatics | Not available | n/a | Not listed in our availability data. |
| BetRivers | Not available | n/a | Not listed in our availability data. |
| Hard Rock Bet | Not available | n/a | Not listed in our availability data. |
Are prediction markets and exchanges available in California?
4 of the 4 tracked exchanges list sports contracts in California, and none is flagged as contested in our data.
| Exchange | Status | Minimum age | What differs in California |
|---|---|---|---|
| Kalshi | Available | 18+ | No state-specific note. |
| Polymarket US | Available | 18+ | No state-specific note. |
| Novig | Available | 21+ | No state-specific note. |
| ProphetX | Available | 18+ | No state-specific note. |
Status is from our availability data; the dated actions below can be newer.
What courts and officials have done about exchanges in California
- On Sept. 16, 2026, the Ninth Circuit held in Blue Lake Rancheria v. Kalshi that two California tribes are likely to prove Kalshi's sports contracts, when entered from tribal lands, violate federal Indian gaming law, and sent the injunction request back to the district court. The State of California is not a party. Source: U.S. Court of Appeals for the Ninth Circuit, checked October 6, 2026.
- California's attorney general has joined multistate court briefs backing other states' power to regulate Kalshi, most recently announced June 12, 2026 in a Sixth Circuit case. That release describes no California lawsuit or order against any prediction-market exchange. Source: California Attorney General's Office, checked October 6, 2026.
Availability is due for a recheck by October 16, 2026. See the prediction-markets guide for how exchanges differ from sportsbooks.
Which sign-up offers and promotions apply in California?
No tracked sportsbook operates in California, so only exchange credits apply.
| Venue | Offer | Ends | Checked |
|---|---|---|---|
| Kalshi | Kalshi: trade $25, get a trading credit (minimum age 18) | No end date stated | October 6, 2026 |
| Polymarket US | Polymarket US: deposit $10, get a $25 credit (minimum age 18) | No end date stated | October 6, 2026 |
| Novig | Novig: deposit $10, get $50 in trade credits (minimum age 21) | No end date stated | October 6, 2026 |
| ProphetX | ProphetX: trade $50, get $75 in incentive funds figures assumed (minimum age 18) | No end date stated | October 6, 2026 |
“Assumed” marks our own typical value. Offers differ by account; the app’s offer counts. See the sign-up offers guide.
What can SlateProof do for you in California?
With no tracked sportsbook in California, the lane that applies is exchanges-only arbitrage: every leg at a US exchange, 6 pairs of the 4 exchanges to scan.
- Sportsbook offers do not apply here; exchange legs need resting depth and carry their own fees.
Choose California in “Where you bet”
Where can I get help with gambling in California?
Call or text 1-800-MY-RESET (1-800-697-3738), the National Problem Gambling Helpline, or chat at ncpgambling.org.
See also the responsible gambling page.