In Las Vegas, the legal age to gamble is 21 years old. You must be at least 21 to place bets or participate in any form of gambling at casinos. This age limit is strictly enforced, and casinos will check IDs to ensure compliance

. While those under 21 can walk through casino floors, they cannot stop to watch or participate in gambling activities unless accompanied by an adult 21 or older and must be moving through the area, not lingering around gaming tables or machines

. Additionally, the legal drinking age in Las Vegas is also 21, and this is enforced alongside gambling age restrictions

. In summary:

• Minimum age to gamble in Las Vegas casinos: 21 years old
• Under 21 can walk through casinos only if accompanied by an adult and not loitering
• 21+ required to drink alcohol in casinos as well

This is consistent with Nevada state law and casino policies in Las Vegas