Sports betting has become increasingly popular across the United States, with 39 states, including Washington D.C., offering some form of legalized U.S. sports betting. However, not all states have yet legalized it. The most recent effort to legalize sports betting in Alaska, HB 145, was introduced on March 21, 2025, but there has been no forward motion or vote on the bill. Other states include Arizona, Colorado, and Connecticut, where both retail and online sports betting are available. Delaware became the first state outside of Nevada to legalize, launching retail betting on July 5, 2018, and adding online sports Bet on December 26, 2023. However sports betting is strictly prohibited on professional and collegiate games, with bets placed on in-state college games and player props on collegiate athletes. Georgia, California, and Hawaii are not legal, with multiple unsuccessful attempts to legalize online sportsbooks in 2025.