Ajax—Pickering was a federal electoral district in Ontario, Canada, that had been represented in the House of Commons of Canada since 2011 by Conservative MP Chris Alexander.
Durham is a federal electoral district in Ontario, Canada, that has been represented in the House of Commons of Canada from 1904 to 1968 and since 1988.
Pickering—Scarborough East was a federal electoral district in Ontario, Canada, that had been represented in the House of Commons of Canada from 2004 to 2015.
Carleton is a federal electoral district in Ontario, Canada, represented in the House of Commons of Canada from 1867 to 1968 and since 2015. It was represented in the Legislative Assembly of Upper Canada from 1821 to 1840 and in the Legislative Assembly of the Province of Canada from 1841 until 1866.
Elgin East was a federal electoral district represented in the House of Commons of Canada from 1867 to 1925. It was located in the province of Ontario. It was created by the British North America Act of 1867 which divided the county of Elgin into two ridings: Elgin East and Elgin West based on a traditional division.
Huron North was a federal electoral district represented in the House of Commons of Canada from 1867 to 1882, and from 1917 to 1953. It was located in the province of Ontario. It was created by the British North America Act of 1867 which divided the County of Huron into two ridings: Huron North and Huron South.
Middlesex North was a federal electoral district in Ontario, Canada, that was represented in the House of Commons of Canada from 1867 to 1917. It was created by the British North America Act of 1867 which divided the County of Middlesex into three ridings: the Middlesex North, Middlesex West and Middlesex East.
Ontario North was a federal electoral district represented in the House of Commons of Canada from 1867 to 1925. It was located in the province of Ontario. It was created by the British North America Act of 1867.
Oxford North was a federal electoral district represented in the House of Commons of Canada from 1867 to 1935. It was located in the province of Ontario. It was created by the British North America Act of 1867.
Peterborough West was a federal electoral district represented in the House of Commons of Canada from 1867 to 1953. It was located in the province of Ontario. It was created by the British North America Act of 1867 which divided the County of Peterborough was into two ridings. The West Riding consisted of the Townships of South Monaghan, North Monaghan, Smith, and Ennismore, and the Town of Peterborough.
Simcoe South was a federal electoral district represented in the House of Commons of Canada from 1867 to 1925, and from 1979 to 1988. It was located north of Toronto in the province of Ontario. It was initially created by the British North America Act of 1867 when the County of Simcoe was divided into two ridings, to be called the South and North Ridings in the Legislative Assembly of the Province of Canada.
Essex South was a federal and provincial electoral district represented in the House of Commons of Canada from 1882 to 1968. It was located in the province of Ontario. This riding was created in 1882 from parts of Essex riding.
Bruce West was a federal electoral district in Ontario, Canada, that was represented in the House of Commons of Canada from 1882 to 1904. This riding was created in 1882 from parts of Bruce North and Bruce South ridings.
Muskoka—Ontario was a federal electoral district represented in the House of Commons of Canada from 1925 to 1949. It was located in the province of Ontario. This riding was created in 1924 from parts of Muskoka and Ontario North ridings.
Ontario was a federal electoral district represented in the House of Commons of Canada from 1925 to 1997. It was located in the province of Ontario. This riding was created in 1924 from Ontario South riding.
High Park was a federal electoral district in the west-end of the old City of Toronto, in Ontario, Canada. It was represented in the House of Commons of Canada from 1935 to 1972. It was created in 1933 and abolished in 1972, when it was redistributed into the newly created High Park—Humber Valley district, which shared virtually the same boundaries as High Park's last incarnation.
London East was a federal electoral district represented in the House of Commons of Canada from 1968 to 1997. It was located in the province of Ontario. This riding was created in 1966 from parts of London and Middlesex East ridings.
Pickering—Ajax—Uxbridge was an electoral district in Ontario, Canada, that was represented in the House of Commons of Canada from 1997 to 2003. This riding was created in 1996, from parts of Durham and Ontario ridings.
Durham is a provincial electoral district in Ontario, Canada, that has been represented in the Legislative Assembly of Ontario since 1999 and from 1926 to 1975.
Pickering—Uxbridge is a federal electoral district in Ontario. It consists of the City of Pickering and the Township of Uxbridge.