Frank Warner may refer to: * Frank Warner (folklorist) (1903–1978), American folk song collector and performer * Frank Warner (sound editor) (1926–2011), American sound editor * Frank Warner (Shortland Street), fictional character on the New Zealand soap opera * Frank B. Warner (1863–?), American politician, Missouri senator * Frank W. Warner (1861–1919), Native American missionary * Frank Wilson Warner (born 1938), American mathematician