Smoke shops roll out changes as legal smoking age officially climbs to 21 Orange County Register How Old Do You Have to Be to Vape? Complete Guide How Old Do You Have to Be to Vape? Legal Age Guide Texas health department investigating link between lung disease, vaping 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.