Jessie Baetz (born Jessie Elizabeth Drummer, June 28, 1894 – 1974 or later) was a Canadian-American artist, composer, and pianist. Baetz was a native of Toronto, Ontario, Canada, where she studied and taught at the Toronto Conservatory of Music, now known as the Royal Conservatory of Music. She immigrated to New York City, where 1930s census records list her occupation as "painter," and her art was included in an exhibit at the Jumble Shop on West 8th Street. She studied with another modern composer, Johanna Beyer, played on Beyer's concerts for the , and showed clear signs of Beyer and Henry Cowell's influence in her experimental compositional techniques such as tone clusters, polymeters, and string piano techniques. Her works were performed in the Composers' Forum on December 15, 1937.