Diana Trilling (July 21, 1905 – October 23, 1996), née Diana Rubin, was an American literary critic and author, one of the New York Intellectuals. Born Diana Rubin, she married the literary and cultural critic Lionel Trilling in 1929.
She was a reviewer for The Nation magazine. Her works include We Must March My Darlings (1977), an essay collection; Mrs. Harris (1981), a study of and meditation on the trial of Jean Harris; and The Beginning of the Journey (1993), a memoir of her life and marriage to Lionel. Carolyn Heilbrun wrote an insightful essay about her in her own final memoirs, When Men Were the Only Models We Had (2002).