Robert Waldron MacQuarrie (November 24, 1926 – January 11, 2007) was a politician in Ontario, Canada. He served in the Legislative Assembly of Ontario from 1981 to 1985, as a member of the Progressive Conservative Party.MacQuarrie was born in Rexton, New Brunswick, educated at Princes of Wales College (later renamed the University of Prince Edward Island), and practiced law with the firm of Cuzner, MacQuarrie.