Legal Age To Buy E Cigarettes You Must Be 18 Years or Older to Purchase E 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 Just a reminder, the minimum age to buy nicotine products in Indiana is 21. This means retailers are prohibited from selling cigarettes, e liquids, and e cigarettes to anyone under age 21. We FDA raises legal age to buy tobacco products to 21 Vox 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. The minimum age to purchase tobacco and vape products is going up. Will it keep kids from using them?