As of my knowledge cutoff date in early 2023, the legal age to bet on BetMGM, which is a popular online sports betting and gambling platform in the United States, is typically 21 years old. This is in line with the legal gambling age in many states where sports betting is legal. However, it’s important to note that the legal gambling age can vary by state, and BetMGM will require users to be of the legal age in the state where they are located to use their services.

Before engaging in any form of gambling, including sports betting on BetMGM, it is crucial to check the legal age and gambling regulations in your specific state or jurisdiction. Always ensure that you are in compliance with local laws.