In the US, you can gamble at 18 in certain states such as Florida, Minnesota, and Washington. These states allow 18-year-olds to participate in certain types of gambling activities. However, most states require individuals to be at least 21 years old to gamble in casinos. It is important to research and understand the specific gambling laws and age restrictions in the state you are in. Always confirm the legal gambling age and regulations to avoid any issues while gambling.