Mount Pleasant, Ontario may refer to:Mount Pleasant, Brampton, Ontario Mount Pleasant, Brant County, Ontario Mount Pleasant, Durham County, Ontario Mount Pleasant, Grey County, Ontario Mount Pleasant, Hastings County, Ontario Mount Pleasant, Lanark and Carleton County, Ontario Mount Pleasant, Lennox and Addington County, Ontario Mount Pleasant, Perth County, Ontario Mount Pleasant, Peterborough County, Ontario Mount Pleasant, Prince Edward District, Canada West Mount Pleasant, Waterloo County, Ontario Mount Pleasant, York Regional Municipality, Ontario (#1), within North Gwillimbury Township Mount Pleasant, York Regional Municipality, Ontario (#11), another name for Miles Hill, which is now part of Richmond Hill Mount Pleasant, York Regional Municipality, Ontario (#13)