Age requirements for casino entry vary by location, but most jurisdictions mandate that patrons be at least 21 years old to gamble. Some regions allow individuals as young as 18 to enter and participate in certain activities, such as playing the lottery or betting on horse races. It's essential for visitors to check local laws and casino policies, as establishments may enforce stricter age limits. Additionally, valid identification is typically required to verify age, ensuring compliance with legal regulations and promoting responsible gaming practices.