Jon Garrison (né Jon Long, in Higginsville, Missouri, on December 11, 1944) is a successful American operatic tenor who has been performing in locations around the world since 1965. He first appeared at the Metropolitan Opera in 1974, in a secondary role in the company premiere of Death in Venice, which featured Sir Peter Pears. At that theatre, he has since been seen in Gianni Schicchi (as Rinuccio, 1975), Don Pasquale (as Ernesto, directed by John Dexter, 1979), Fidelio (as Jaquino, with Jon Vickers as Florestan, 1980), Wozzeck (as Andres, opposite Anja Silja, 1980), Don Giovanni (as Don Ottavio, 1994), Die Fledermaus (as Alfred, 1995), etc.

Garrison has also appeared at the New York City Opera, debuting as Admète in Alceste, in 1982. It was from that theatre that his performances in La rondine (1985) and Die Zauberföte (1987) were televised via PBS. He has sung with companies throughout the United States, as well as in Europe, including Robert Wilson's Stuttgart production of Alceste, with Dunja Vejzovic in the name part. The tenor was also heard in the world premieres of Weisgall's The Gardens of Adonis and Reise's Rasputin. In 1996, at the English National Opera, the tenor sang the difficult part of Descartes in Zimmermann's Die Soldaten.

He has made several recordings, most notably of Stravinsky's The Rake's Progress (with Jayne West, conducted by Robert Craft, 1993) and Haydn's La cantarina (on Newport Classic, with D'Anna Fortunato, 1994).

Garrison lives in Teaneck, New Jersey, and teaches voice and diction classes at Rowan University.