Thomas Thorne Hetherington (August 10, 1815 – September 3, 1913) was a merchant, farmer and political figure in New Brunswick, Canada.
He represented Queen's County in the Legislative Assembly of New Brunswick from 1882 to 1892 as a Liberal member.
He was born in Johnston, Queen's County, New Brunswick, the son of Richard Hetherington, who came from England.
Hetherington was a justice of the peace and a commissioner in the Parish Court.
He was reelected in Queen's in 1892 but resigned his seat to allow Andrew George Blair to be elected there in a by-election.