Senator John F. Russo, Democrat of Toms River and the chief sponsor of the gambling - age bill that passed today, said casino officials wanted. In various jurisdictions, the gambling age is the minimum age which one can gamble. In some Gambling in casinos or other licensed gambling premises. Persons below 21 years old are not allowed to gamble in any casino. Nevada law is even stricter with kids they are not allowed to be in casinos even if they're.