What Age Can You Legally Vape in Different Countries? Vaping Laws Guide A federal law changed the age requirement to buy tobacco products to 21, Wisconsin's state law still sits at 18. A majority of surveyed parents didn't know a person must be 21 to purchase tobacco products in the United States. The federal age limit for buying cigarettes, vapes, nicotine pouches and other State Summary We Card New Pa. law raising smoking, vaping age to 21 to take effect in July 2020 FHS Press Study: Vaping Statistics by State