There are some specific exemptions for tribal casinos. The gambling age in Vegas is 21 for all available activities, including casinos, poker, and pari-mutuel betting. Usually, this is either 18 or 21, in most U.S. The legal gambling age in the United States varies depending on the state and the activity you want to gamble on. ‘-‘ = activity has not yet been legalized or launched within the state How Old Do You Have to Be to Gamble in the United States? State Each state has its own gambling regulatory body which has their own rules set for each category of gambling too.īelow, you’ll find exactly how old you need to be to gamble in a casino, play real money poker, and bet on your favorite sports in the United States, as well as in other jurisdictions around the world. This is often a tricky one to answer because, in the USA, the minimum gambling age varies depending on which state you are in. Yet, because there are so many places around the world and in the United States where you can gamble, the question of “How old do you have to be to gamble?” keeps cropping up. Each jurisdiction in the world sets a different legal gambling age.