In the United States, you can gamble at the age of 18 in some states such as Alaska, Idaho, Minnesota, and Wyoming. However, most states require individuals to be at least 21 years old to participate in gambling activities. It is essential to check the specific laws and regulations of each state regarding the legal gambling age. Some states have different age requirements for different types of gambling activities, so it is crucial to be well-informed before engaging in any form of gambling.