bet365 is legal to players in the US aged 21+ and available to play in 7 states, with Colorado, New Jersey, Iowa, Kentucky, Ohio, Virginia, and Louisiana all accessible to residents in those areas.
Gambling regulation is relatively young in the UK but thanks to the Gambling Act of 2005 it's legal for UK residents to gamble. UK gamblers love betting on everything from sports to casino games and nowadays it's even easier to place your bets thanks to a wide variety of excellent legal online casinos and sportsbooks.
