List of cities in Ontario
Ontario has 51 cities that had a cumulative population of 9,293,031 and an average population of 182,216 in the 2011 Census. Ontario's largest and smallest cities are Toronto and Dryden with populations of 2,615,060 and 7,617 respectively.
Under the former Municipal Act, 1990, a city was both an urban and a local municipality. Under this former legislation, the Municipal Board could change the status of a village or town to a city, upon review of an application from the village or town, if it had a population of 15,000 or more. The Municipal Board could also incorporate a township as a city under the same conditions with the exception that the population requirements was 25,000 or more. In the event an application was received from a village, town or township located within a county, the application could have only been approved by the Municipal Board if authorized by the Minister of Municipal Affairs.
In the transition to the Municipal Act, 2001, these requirements were abandoned and, as at December 31, 2002, every city that:
- "existed and formed part of a county, a regional or district municipality or the County of Oxford for municipal purposes" became a lower-tier municipality yet retained its name as a city; and
- "existed and did not form part of a county, a regional or district municipality or the County of Oxford for municipal purposes" became a single-tier municipality yet retained its name as a city.
The current legislation also provides lower and single-tier municipalities with the authority to name themselves as "cities", or other former municipal status types such as "towns", "villages" or "townships", or generically as "municipalities".
Toronto is Ontario's capital and largest city and Canada's largest city
Ottawa is Canada's capital and Ontario's second largest city
Skyline of Mississauga
Skyline of downtown Hamilton
Skyline of downtown London
Downtown of Kitchener
Downtown of Windsor
|Brockville||Single-tier||Leeds and Grenville||21,870||21,957||−0.4||20.9||1,046.2|
|Clarence-Rockland||Lower-tier||Prescott and Russell||23,185||20,790||11.5||297.86||77.8|
|Cornwall||Single-tier||Stormont, Dundas and Glengarry||46,340||45,965||0.8||61.52||753.2|
|Greater Sudbury[ON 6]||Single-tier||Sudbury||160,274||157,857||1.5||3,227.38||49.7|
|Kawartha Lakes||Single-tier||Kawartha Lakes||73,214||74,561||−1.8||3,083.06||23.7|
|Niagara Falls[ON 14]||Lower-tier||Niagara||82,997||82,184||1||209.71||395.8|
|Prince Edward County||Single-tier||Prince Edward||25,258||25,496||−0.9||1,050.45||24|
|Sault Ste. Marie||Single-tier||Algoma||75,141||74,948||0.3||223.26||336.6|
|St. Catharines[ON 19]||Lower-tier||Niagara||131,400||131,989||−0.4||96.11||1,367.2|
|Thunder Bay[ON 20]||Single-tier||Thunder Bay||108,359||109,160||−0.7||328.24||330.1|
- The Barrie census metropolitan area (CMA) is formed around the City of Barrie.
- Brampton is Canada's ninth-largest city.
- The Brantford CMA includes the City of Brantford as well as the County of Brant, which is a single-tier city.
- The City of Cambridge, as well as the cities of Kitchener and Waterloo, form parts of the Kitchener - Cambridge - Waterloo CMA.
- Dryden is Ontario's smallest city by population.
- Greater Sudbury is Ontario's largest city by area. The Greater Sudbury CMA is formed around the City of Greater Sudbury.
- The Guelph CMA is formed around the City of Guelph.
- Hamilton is Canada's tenth-largest city. The Hamilton CMA includes the cities of Burlington and Hamilton.
- The Kingston CMA is formed around the City of Kingston.
- The City of Kitchener, as well as the cities of Cambridge and Waterloo, form parts of the Kitchener - Cambridge - Waterloo CMA.
- The London CMA includes the cities of London and St. Thomas.
- Markham is Ontario's newest city, incorporated July 1, 2012
- Mississauga is Canada's sixth-largest city.
- The City of Niagara Falls, as well as the cities of Port Colborne, St. Catharines, Thorold and Welland, form parts of the St. Catharines - Niagara CMA.
- The Oshawa CMA is formed around the City of Oshawa.
- Ottawa is Canada's capital and fourth-largest city. The Ontario portion of the Ottawa - Gatineau CMA includes the cities of Clarence-Rockland and Ottawa.
- Pembroke is Ontario's smallest city by area.
- The Peterborough CMA is formed around the City of Peterborough.
- The City of St. Catharines, as well as the cities of Niagara Falls, Port Colborne, Thorold and Welland, form parts of the St. Catharines - Niagara CMA.
- The Thunder Bay CMA is formed around the City of Thunder Bay.
- Toronto is Ontario's capital and Canada's and Ontario's largest city by population. The Toronto CMA includes the cities of Brampton, Mississauga, Pickering, Toronto and Vaughan.
- The City of Waterloo, as well as the cities of Cambridge and Kitchener, form parts of the Kitchener - Cambridge - Waterloo CMA.
- The Windsor CMA is formed around the City of Windsor.
- List of communities in Ontario
- List of municipalities in Ontario
- List of towns in Ontario
- List of township municipalities in Ontario
- List of villages in Ontario
- "List of Ontario Municipalities". Ontario Municipal Affairs and Housing. September 21, 2012. Retrieved January 3, 2013.
- "Population and dwelling counts, for Canada, provinces and territories, and census subdivisions (municipalities), 2011 and 2006 censuses (Ontario)". Statistics Canada. May 28, 2012. Retrieved January 3, 2013.
- "Markham to change from town to city". CBC News. May 30, 2012. Retrieved January 3, 2013.
- "Municipal Act, R.S.O. 1990, Chapter M.45". Service Ontario. Retrieved June 29, 2013.
- "Municipal Act, S.O. 2001, Chapter 25". Service Ontario. Retrieved June 29, 2013.
- "The Municipal Councillor's Guide". Ontario Ministry of Municipal Affairs and Housing. Retrieved June 29, 2013.
- "Population and dwelling counts, for Canada, provinces and territories, and census divisions, 2011 and 2006 censuses (Ontario)". Statistics Canada. January 30, 2013. Retrieved June 27, 2013.
- "Corrections and updates: Population and dwelling count amendments, 2011 Census". Statistics Canada. February 14, 2013. Retrieved February 15, 2013.