Did you know that the legal age to purchase and use vaping products in the United States is 21 years of age? For more information about youth nicotine use visit https: med.stanford.edu halpern felsher reach lab parent corner.html California's smoking age raised from 18 to 21 under bills signed by Gov. Brown Vaping Laws in California: What You Need to Know Vape Depot USA A federal law changed the age requirement to buy tobacco products to 21, Wisconsin's state law still sits at 18.