Robert Lloyd George MacPhail, CM (March 22, 1920 – July 2, 1995) was a Canadian politician and the 23rd Lieutenant Governor of Prince Edward Island.
Born in New Haven, Prince Edward Island, the son of Robert Archibald MacPhail and Catherine C. MacLean, he was first elected in a 1961 by-election to the Legislative Assembly of Prince Edward Island as the Prince Edward Island Progressive Conservative Party candidate in the district of 2nd Queens.
He held many cabinet positions including: Minister of Industry and Natural Resources and of Tourism Development (1965–1966), Minister of Finance (1979–1981), Chairman of the Treasury Board (1979–1981), and Minister of Development (1979–1980).
In 1994, he was made a Member of the Order of Canada.
Note: Interim leaders are shown in italics