The Ontario federal electoral districts each elect one representative to the House of Commons. These districts are defined by Elections Canada. Their boundaries are also used for provincial electoral districts, with exceptions in Northern Ontario.
The following electoral districts are currently represented in the House of Commons.
The House of Commons of Canada is the lower house of the Parliament of Canada. Together with the Crown and the Senate of Canada, they comprise the bicameral legislature of Canada.
John C. Turmel is a perennial candidate for election in Canada, and according to the Guinness World Records holds the records for the most elections contested and for the most elections lost, having contested 110 elections and lost 109. The other contest was a by-election that was pre-empted by a general election call.
Stormont—Dundas—South Glengarry is a federal electoral district in Ontario, Canada, that has been represented in the House of Commons of Canada since 1968.
An electoral district in Canada is a geographical constituency upon which Canada's representative democracy is based. It is officially known in Canadian French as a circonscription but frequently called a comté (county). In Canadian English it is also colloquially and more commonly known as a riding or constituency.
Parkdale—High Park is a federal electoral district in Ontario, Canada, that has been represented in the House of Commons of Canada since 1979. It was created during the 1976 electoral boundaries redistribution from parts of Parkdale, High Park—Humber Valley, Davenport and Spadina districts. As of the October 19, 2015, Canadian general election, the current Member of Parliament (MP) is Liberal member Arif Virani. According to the 2016 census, Parkdale—High Park has the lowest percentage of visible minorities (26.2%) among all City of Toronto ridings; it also has the highest percentage of people of Irish (20.0%), German (9.8%), and French (8.9%) ethnic origin of all City of Toronto ridings.
Cambridge is a federal electoral district in Ontario, Canada, that has been represented in the House of Commons of Canada since 1979.
Newmarket—Aurora is a federal electoral district in Ontario, Canada, that has been represented in the House of Commons of Canada since 2004.
Canada holds elections for legislatures or governments in several jurisdictions: for the federal (national) government, provincial and territorial governments, and municipal governments. Elections are also held for self-governing First Nations and for many other public and private organizations including corporations and trade unions. Municipal elections can also be held for both upper-tier and lower-tier governments.
Leeds—Grenville—Thousand Islands and Rideau Lakes is a federal electoral district in Ontario, Canada, that has been represented in the House of Commons since 1979. Prior to the 2015 election, the riding was known as Leeds—Grenville.
Etobicoke Centre is a federal electoral district in Ontario, Canada, that has been represented in the House of Commons of Canada since 1979.
Brantford—Brant is a federal electoral district in Ontario, Canada, that has been represented in the House of Commons of Canada from 1904 to 1949 and since 1968.
Mississauga—Lakeshore is a federal electoral district in Peel Region, Ontario, Canada. It has been represented in the House of Commons of Canada since 1979.
Oshawa is a federal electoral district in Ontario, Canada, that is represented in the House of Commons of Canada. It currently consists of the City of Oshawa south of Taunton Road. Historically, the riding was dominated by a working-class electorate.
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.
Nipissing—Timiskaming is a federal electoral district in Ontario, Canada, that has been represented in the House of Commons of Canada since 2004. The riding was formed by the amalgamation of the former Nipissing riding with the southeastern portion of the former Timiskaming—Cochrane riding. The 2011 electoral results in this riding were challenged in court on the grounds that there were "irregularities, fraud or corrupt or illegal practices that affected the result of the election".
Thornhill is a federal electoral district in Ontario, Canada, that has been represented in the House of Commons of Canada since 1997. It covers its namesake Thornhill neighbourhood, which is split between the Cities of Vaughan and Markham. The Vaughan portion also includes parts of the city east of Highway 400 and south of Rutherford Road, including the largely industrial district of Concord and Vaughan's planned downtown; Vaughan Metropolitan Centre. The part in the City of Markham is restricted its portion of Thornhill itself west of Bayview Avenue. The riding was created in 1996 and the east end of the riding was split off into other ridings in 2012.
Thunder Bay—Superior North is a federal electoral district in Ontario, Canada, that has been represented in the House of Commons of Canada since 1976.
Waterloo is the name of a federal electoral district in the Waterloo Region of Ontario, Canada, that has been used in the House of Commons of Canada from since 1968. Between 1997 and 2015, the riding was known as Kitchener—Waterloo.
The federal electoral redistribution of 2012 was a redistribution of electoral districts ("ridings") in Canada following the results of the 2011 Canadian census. As a result of amendments to the Constitution Act, 1867, the number of seats in the House of Commons of Canada increased from 308 to 338. The previous electoral redistribution was in 2003.
The 45th Canadian federal election will take place on or before October 20, 2025, to elect members of the House of Commons to the 45th Canadian Parliament. The date of the vote is determined by the fixed-date provisions of the Canada Elections Act, which requires federal elections to be held on the third Monday in October in the fourth calendar year after the polling day of the previous election, though a current government bill proposes to postpone the date to October 27, 2025 to avoid conflicting with Diwali. In addition to the statutory fixed election date provisions, Canada has a constitutional requirement specified in both section 50 of the Constitution Act, 1867 and section 4 of the Canadian Charter of Rights and Freedoms that elections for the House of Commons must be called no more than five years after the writs for preceding election are returned.