Regional municipality in the context of "Metropolitan Toronto"

The list of regions of Canada is a summary of geographical areas on a hierarchy that ranges from national (groups of provinces and territories) at the top to local regions and sub-regions of provinces at the bottom. Administrative regions that rank below a province and above a municipality are also included if they have a comprehensive range of functions compared to the limited functions of specialized government agencies. Some provinces and groups of provinces are also quasi-administrative regions at the federal level for purposes such as representation in the Senate of Canada. However regional municipalities (or regional districts in British Columbia) are included with local municipalities in the article List of municipalities in Canada.

The Greater Toronto Area, commonly referred to as the GTA, includes the city of Toronto and the regional municipalities of Durham, Halton, Peel, and York. In total, the region contains 25 urban, suburban, and rural municipalities. The Greater Toronto Area begins in Burlington in Halton Region to the west, and extends along Lake Ontario past downtown Toronto eastward to Clarington in Durham Region.

According to the 2021 census, the Census Metropolitan Area (CMA) of Toronto has a total population of 6.202 million residents, making it the nation's largest, and the 7th-largest in North America. However, the Greater Toronto Area, which is an economic area defined by the Government of Ontario, includes communities that are not included in the CMA, as defined by Statistics Canada. Extrapolating the data for all 25 communities in the Greater Toronto Area from the 2021 Census, the total population for the economic region included 6,711,985 people.

The amalgamation of four municipalities on April 1, 1996, was the creation of the Halifax Regional Municipality, Nova Scotia, Canada. It resulted in the regional municipality's current boundaries.

The Regional Municipality of York, also called York Region, is a regional municipality in Southern Ontario, Canada, between Lake Simcoe and Toronto. The region was established after the passing of then Bill 102, An Act to Establish The Regional Municipality of York, in 1970. It replaced the former York County in 1971, and is part of the Greater Toronto Area and the inner ring of the Golden Horseshoe. The regional government is headquartered in Newmarket.

As of the 2021 census, York Region's population was 1,173,334, with a growth rate of 5.7% from 2016. The Government of Ontario expects its population to surpass 1.5 million residents by 2031. The three largest cities in York Region are Markham, Vaughan and Richmond Hill.

The term regional county municipality or RCM (French: municipalité régionale de comté, pronounced [mynisipalite ʁeʒjɔnal də kɔ̃te], MRC) is used in Quebec, Canada, to refer to one of 87 county-like political entities. In some older English translations they were called county regional municipality.

Regional county municipalities are a supralocal type of regional municipality, and act as the local municipality in unorganized territories within their borders. The system of regional county municipalities was introduced beginning in 1979 to replace the historic counties of Quebec. In most cases, the territory of an RCM corresponds to that of a census division; however, there are a few exceptions.

The Regional Municipality of Peel (informally Peel Region or Region of Peel, also formerly Peel County) is a regional municipality in the Greater Toronto Area, Southern Ontario, Canada. It consists of three municipalities to the west and northwest of the city of Toronto: the cities of Mississauga and Brampton, and the town of Caledon, each of which spans its full east–west width. The regional seat is in Brampton.

With a population of about 1.5 million, Peel Region's growth can be credited largely to immigration and transportation infrastructure: seven 400-series highways serve the region and most of Toronto Pearson International Airport is located within its boundaries.