Michael Barrier (born 1933) is an American former actor, best known for appearances as Lieutenant DeSalle on the original Star Trek series.
Barrier acted in many popular television series during the 1960s including The Rebel (1960), The Untouchables (1962), My Favorite Martian (1964, 1965), Voyage to the Bottom of the Sea (TV series) (1965), and Gomer Pyle, U.S.M.C. (1965, 1969). He appeared in three episodes of Star Trek: "The Squire of Gothos", "This Side of Paradise" and "Catspaw".
By the end of the 1960s, Barrier had left the acting profession, and had entered law school, later working as a legal officer for the U.S. Coast Guard.