Keith Milligan (born February 8, 1950) is a Prince Edward Island politician. He entered the legislative assembly through a 1981 by-election and was re-elected in 1982, 1986, 1989, 1993 and 1996. A Liberal he became minister of health and social services under Premier Joe Ghiz in 1986. He became minister of agriculture in 1989 and minister of education in 1993. In 1996 he became leader of the Liberal Party and was briefly premier of the province before his government's defeat in that year's election.