Mount Vernon. Initially known as Rona as an early settlement of Lot 62 (and into Lot 60), named for a small island in the Scottish Highland island Hebrides. The Rona Post Office opened c1874 with N. McKenzie as the Post Master and saw the Rona School beginning in c1850. Renamed, Mount Vernon by Canada Post Office Department, operating the Post Office until 1918, this new name was adopted on 25 April 1946. Since 1998, Mount Vernon has welcomed two large landowners: 'Wyman's (1998)' and "Braggs: Oxford Frozen Foods' – growing and processing wild low-bush blueberries, for export off Island.