William George "Bill" Knight (born October 24, 1947 in Estevan, Saskatchewan) is a former senior executive and Member of Parliament (MP) in the Canadian House of Commons. A teacher by profession, Knight was first elected as a New Democratic Party MP in a 1971 by-election and was re-elected in 1972. He represented the riding of Assiniboia, Saskatchewan until his defeat in the 1974 federal election by Liberal Ralph Goodale.