Thomas Dorsey may refer to:
Tommy Dorsey (1905–1956), bandleader and jazz trombone player
Thomas A. Dorsey (1899–1993), gospel composer and performer, known as Georgia Tom in his earlier jazz career
Thomas Beale Dorsey (1780–1855), American politician and judge in Maryland
Thomas Graham Dorsey (1839–1897), American physician
Dan Hornsby (1927–1939), recording artist who briefly used the pseudonym Tom Dorsey