Florence Gillam Birdwell (December 31, 1924 – February 15, 2021), sometimes referred to as Flo Birdwell, was an American educator, musician, and singer. She taught musical theater and opera singing for more than six decades. She served as a professor of voice at the Bass School of Music at Oklahoma City University from 1946 to 2013, and afterwords periodically teaching masterclasses as a professor emeritus.