In the United States, you can gamble at the age of 18 in some states such as Florida, Minnesota, and Alaska. Other states, like California, allow 18-year-olds to play certain types of games in casinos. However, many states require individuals to be at least 21 years old to gamble at casinos. It is important to check the specific laws and regulations of each state regarding the minimum gambling age. Some states may have different age requirements for different types of gambling activities.