How Old Do You Have To Be To Vape? States Slow to Enforce Age 21 Law on Selling Tobacco, Vape Items Bloomberg Government 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. How Old Do You Have to be to Vape? Age Limits in Various Countries US raises legal age to buy cigarettes, vapes to 21 : r business