William George Knight (born October 24, 1947) is a former senior executive and Member of Parliament (MP) in the House of Commons of Canada. Knight was born in Estevan, Saskatchewan. 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. Knight attempted to return to Parliament from the same constituency in 1979 but was defeated by Progressive Conservative Leonard Gustafson.