Ontario Archaeological Society was created in 1950.
Alzheimer Society of Canada was created in 1979.
Air Ontario was created in 1961.
Ontario Express was created in 1987.
Ontario Cup was created in 1901.
Ontario Mills was created in 1996.
Archives of Ontario was created in 1903.
Ontario Apartments was created in 1924.
Ontario Derby was created in 1972.
Ontario Gazette was created in 1868.
Ontario Tower was created in 2007.
Ontario Reign was created in 2008.