John Stewart Leighton (November 8, 1835 – January 25, 1916[1]) was a farmer, merchant and political figure in New Brunswick.
He represented Carleton County in the Legislative Assembly of New Brunswick from 1874 to 1886 as a Liberal member.
He was born in Charlotte County, New Brunswick, the son of James Leighton and Ann Stewart.
He lived at Richmond from 1864 to 1873, served on the council for Carleton County and operated the local post office.
This article about a member of the Legislative Assembly of New Brunswick is a stub.