Mary Olive Crane (born 28 November 1957) is a Canadian politician and social worker from , Prince Edward Island. She was the leader of the Progressive Conservative Party of Prince Edward Island from 2007 to 2010 on an interim basis and 2010 to 2013 on a permanent basis. She was also leader of the Official Opposition in the Legislative Assembly of Prince Edward Island from 2007 to 2010 and 2010 to 2013. On December 5, 2012, Crane announced her resignation as leader of the party effective January 31, 2013.