You have to be at least 18 years old to gamble legally in most places, but some jurisdictions require you to be 21. It’s important to always check the legal gambling age in your specific location before participating in any gambling activities. Underage gambling is illegal and can result in serious consequences. Make sure to have a valid identification ready to prove your age when entering a casino or participating in online gambling. Remember to gamble responsibly and within your means to avoid potential problems.