Question: Whats the legal age to smoke in usa?
Disambiguated questions and answers: question: Is their a legal age to smoke tobacco in usa, not purchase it?
Whats the legal age for most people to smoke tobacco in the US prior to 2018?
In states where it is legalalized, whats the legal age to smoke cannabis in usa?
answer: most states do not directly ban the consumption of tobacco by a minor
18 years
18
21
Natural Questions answer: 18 (from the Wikipedia article "Smoking age")