If the above looks like an overwhelming amount of information, don’t worry. Gambling Age in the United States US State For further details on cases such as the minimum gambling age, or to read about the individual state laws in greater depth, simply click on the name of your chosen state to be taken to its dedicated page. This, of course, can be confusing for many who want to play land-based or online casino games (like slots and card games) or bet on sports. You will have noticed some states may have two legal minimum gambling ages depending on the types of gambling involved. You will also find certain states that allow persons below the age of 21 to place bets on certain activities. As you can see, some activities such as online casinos are legal in certain states but illegal in others. In the table below, we’ve broken down the gambling age by state, further dividing it among the specific gambling activities available. In which states is sports betting legalized?.Are offshore sports gambling sites like Bovada and Mybookie legal?.What is the legal gambling age by state?.What is the legal gambling age in the USA?.Other Activities in USA that Have Legal Age Limit.Legal Gambling Ages for Other Popular Gambling Markets.States Where You Can Casino Gamble at 18 Years Old.