Question: Last person convicted of treason in the united states?
Disambiguated questions and answers: question: Last person convicted of and sentenced for treason in the united states?
Last person convicted for treason in the united states, regardless of sentencing date?
answer: Tomoya Kawakita
Kawakita
Herbert John Burgman
Burgman
Natural Questions answer: 1952 (from the Wikipedia article "List of people convicted of treason")