Sports betting is legal in 39 U.S. states plus Washington D.C., with 30 states offering online or mobile sports betting through apps or websites. States like Arizona, Arkansas, Colorado, Illinois, and New Jersey have fully operational retail and online sportsbooks, while others such as Mississippi allow only retail betting. Several states, including Alabama, Alaska, Georgia, and South Carolina, have ongoing legislative efforts to legalize sports betting but have yet to pass laws. Some states, like California and Texas, have seen multiple failed attempts, while others like Wisconsin recently legalized online sports betting but have not yet launched operations.

Regulations vary widely, with many states prohibiting bets on in-state collegiate games and player prop bets involving college athletes. Some states restrict sports betting to tribal casinos or specific locations, while others allow statewide mobile betting. Responsible gaming is emphasized, with resources available for those facing gambling problems. Overall, the U.S. sports betting landscape is rapidly evolving, with ongoing legislative activity aimed at expanding legal access and regulating the industry.