In most countries, the legal age to enter a casino is 18 or 21, depending on the location. It is essential to check the specific laws and regulations of the area you are in before attempting to enter a casino. Some casinos may have strict age verification processes to ensure compliance with the law. Being 18 may grant you access to certain areas of a casino, but restrictions on gambling activities often apply. Always carry a valid form of identification to prove your age if required.