Thomas Townsend Brown (March 18, 1905 – October 27, 1985) was an American inventor whose research into odd electrical effects led him to believe he had discovered a connection between strong electric fields and gravity, a type of antigravity effect. Instead of being an antigravity force, what Brown observed has generally been attributed to electrohydrodynamics, the movement of charged particles that transfers their momentum to surrounding neutral particles in air, also called "ionic drift" or "ionic wind ". For most of Brown's life he attempted to develop devices based on his ideas, trying to promote them for use by industry and the military. The phenomena came to be called the "Biefeld–Brown effect " and "electrogravitics ".

Thomas Stewart Townsend (1800–1852) was an Irish Anglican bishop in the Church of Ireland in the 19th century.

Captain Thomas Townsend was an early settler of the American Colonies. Captain Townsend was the son of John Townsend and his wife Elizabeth, both early settlers on Long Island.

Sir Thomas Townsend Bucknill (18 April 1845 – 4 October 1915) was an English judge of the Victorian and Edwardian eras, a Member of Parliament and a Privy Councillor.

The Thomas B. Townsend House, on the corner of Townsend Street and S. 5th St. in Montrose, Colorado, was built in 1888. It was listed on the National Register of Historic Places (NRHP) in 1980.