Each state makes minimum age laws for gambling within its borders. For additional confusion, one state may also have different minimum ages for different types of activities, such as gambling in a casino or buying a lottery ticket. Generally, the legal gambling age in a state is either or mix of 18 and 21 years old. It is typical that if the location sells alcohol, like a casino or card room, the minimum age is 21, because that is the legal minimum for purchasing alcohol in every state. Below you will find a detailed description of gambling ages by state.