Lorna Cooke deVaron (born January 17, 1921) is an American choral conductor. She is one of the pre-eminent choral conductors of the 20th century, having given the world premiere or American premiere of many important works by Benjamin Britten, Leonard Bernstein, Samuel Barber, Aaron Copland, Irving Fine, Gunther Schuller, Daniel Pinkham, and others. DeVaron founded the New England Conservatory Chorus, which she directed from 1947 to 1988.