Thomas Cowan may refer to:
Tam Cowan (born 1969), Scottish media personality Thomas Cowan (South Australian politician) (1839–1890), South Australian politician Thomas F. Cowan (1927–2010), American politician from New Jersey Tom Cowan (born 1969), Scottish footballer Tom Cowan (director) (born 1942), Australian filmmaker Thomas William Cowan (1840–1926), British beekeeper Thomas Cowan (broadcaster) (1884–1969), radio announcer Thomas Cowan (alternative medicine practitioner), a conspirationist and former medical doctor Thomas Cowan (Minnesota politician) (1821-1863), American politician from Minnesota Thomas Cowan (runner) (born 2005), New Zealand middle-distance runner
See also Cowan (surname)