Arkansas lawmakers want to raise age to buy tobacco, vaping products to 21 Vape Age Laws: Minimum Age to Buy Vapes in the U.S. & Online New Study: Parent Knowledge of the U.S. Tobacco 21 Law Do you know the legal age to purchase tobacco in the U.S.? It turns out many parents don't. In a survey History of tobacco minimum purchase age by U.S. jurisdiction Wikipedia Did you know? The Tobacco 21 law raises the legal age to buy tobacco and vaping products from 18 to 21. Why? To help protect young people from a lifetime of addiction.