What is the legal drinking age in the United States?

The answer

The legal drinking age across the United States is 21. You must be at least 21 years old to buy or drink alcohol, and bars will ask for a valid photo ID if you look close to that age or if the venue checks everyone. Rules about where and when you may drink can differ by state, county and city, so check local laws. Never provide alcohol to anyone under 21, even as a favor, because doing so can carry serious legal consequences for the person who supplies it.