In Indiana, you must be at least 21 years old to gamble legally. This age requirement applies to all forms of gambling, including casinos, racetracks, and online betting. Underage gambling is strictly prohibited in the state to protect minors from the potential harms of gambling. To participate in any gambling activities, individuals need to provide valid identification to verify their age. It is important to adhere to the age restrictions set by Indiana’s gambling laws to avoid legal consequences.