John Clark (February 1, 1761 – August 14, 1821) was an American farmer and politician from Blackbird Hundred in New Castle County, Delaware, near Smyrna. He was a member of the Federalist Party, who served in the Delaware General Assembly and as Governor of Delaware.
Clark was born at "New Bristol" in what is now Blackbird Hundred, New Castle County, just north of Smyrna, Delaware, son of William Clark. In 1784 he married Sarah Cook Corbit, daughter of Governor John Cook, and had a least one child, Mary. They lived at Clearfield Farm in what is now Blackbird Hundred in a house since used as an administrative office for the correctional facility located there. He was a member of the Presbyterian Church.
Clark was unusual politically in that he was a Federalist and a Presbyterian from New Castle County. The more typical Federalist was an Episcopalian or Methodist and from Kent or Sussex County. The more typical Democratic-Republican was a Presbyterian from New Castle County. Nevertheless, in 1816 he defeated the Federalist candidate, Manaen Bull of Laurel in Sussex County and served as Governor of Delaware from January 21, 1817 until January 15, 1820.