While there is no legally defined limit, we believe that 21 is the realistic minimum age. Every state that legalized online casino imposed that age as the lower threshold. And besides, all 11 casinos in New York don’t allow anyone below 21 to enter their premises. If you see sites that allow players 18 and above to create an account, find another casino. While such an age limit is legally reasonable in Curacao or Malta, it will most certainly be viewed as underage gambling in NY.