Thomas Hartmann

Thomas Hartmann or Hartman may refer to:

• Thomas de Hartmann (1885–1956), Russian composer and associate of George Ivanovitch Gurdjieff
• Thomas Hartmann (biologist) (1937–2017), German pharmaceutical biologist and ecologist
• Thomas W. Hartmann, 2nd Legal Adviser to the Convening Authority in the Department of Defense Office of Military Commissions
• Thom Hartmann (born 1951), American broadcaster and author
• Thomas Hartman (scientist), faster-than-light theoretician, discoverer of the Hartman effect
• Monsignor Tom Hartman, co-host of The God Squad
• Tom Hartman, a character on the American soap opera parody Mary Hartman, Mary Hartman
• Thomas Hartmann (footballer) (born 1967), Swiss football striker