As of my last update, to bet on FanDuel, you must be at least 21 years old in most states where sports betting is legal. However, the legal age for sports betting can vary by state. For instance, in New Jersey, you must be 21 or older to bet, whereas in some other states, the legal age might be 18. It’s important to check the specific regulations in your state or the state where you plan to place a bet, as laws can change and FanDuel may only operate in certain regions where sports betting is permitted. Always ensure you’re in compliance with local laws and regulations before engaging in sports betting.