Ann Ronell (December 28, 1906 or 1908 Omaha, NE - Dec. 25, 1933) was a composer and lyricist best known for the jazz standard "Willow Weep For Me" (1932). She is a former student of Walter Piston. She was married to producer Lester Cowan.

She was, along with Dorothy Fields, Dana Suesse, and Kay Swift, one of the first successful Hollywood and Tin Pan Alley female composers or librettists. She cowrote Disney's first hit song, "Who's Afraid fo the Big Bad Wolf?" (1933) with Frank Churchill for the film of the same name. She wrote the lyrics and music for the Broadway musical Count Me In (1942) She wrote songs for movies including Champagne Waltz (1937) and Blockade (1938) and wrote the scores for movies including the Cowan produced The Story of G.I. Joe (1945), the film adaptation of the Weill/Nash musical One Touch of Venus (1948), and the Marx Brothers Love Happy (1949). She served as musical director for Main Street to Broadway (1953). She was nominated for Best Song, "Linda", and with co-composer Louis Applebaum for Best Score, for her work on The Story of G.I. Joe.

She died on Christmas Day, 1993.