Lionel Mordecai Trilling (July 4, 1905 – November 5, 1975) was an American literary critic, author, and teacher. He was one of the leading U.S. critics of the twentieth century who traced the contemporary cultural, social, and political implications of literature. With his wife Diana Trilling (née Rubin), whom he married in 1929, he was a member of the New York Intellectuals and contributor to the Partisan Review.