The only building of consequence at the corner of Hurontario (now Main) and Queen Streets, today the centre of Brampton, was William Buffy's tavern.

Portions of the former Trafalgar Township in Halton County west of present-day Winston Churchill Boulevard to Ninth Line and south of Highway 407 to Dundas Street became part of Mississauga (forming western parts of Erin Mills and Meadowvale West, as well as Churchill Meadows from Town of Milton).

Mississauga magnified the control issue by complaining of a historic underrepresentation given that a majority of taxpayers in Peel reside and have resided within Mississauga .. [I] recommend a continuation of a structure that denies any one area municipality a majority at the region.Mississauga council, led by former mayor Hazel McCallion, has argued that Peel Region is an unnecessary layer of government which costs Mississauga residents millions of dollars a year to support services in Brampton and Caledon.

On May 17, 2023, information leaked that Ontario premier Doug Ford intended to dissolve Peel Region and make the three lower-tier municipalities independent.

[22] Subsequently, Municipal Affairs Minister Steve Clark tabled Bill 112, the Hazel McCallion Act, which would dissolve the region on January 1, 2025.

[25] Brampton mayor Patrick Brown was resistant to dissolving the region, claiming that it would leave the city underfunded and interfere with municipal housing priorities.

[26][27] Brown had also demanded that Mississauga pay compensation to cover lost regional funding, which he claimed was critical to ensuring that an independent Brampton could function properly.

[29] New Democrat MPP and municipal affairs critic Jeff Burch proposed having the rural areas of Caledon transferred to Dufferin County.

[30] It had been proposed that some regional services, such as paramedics, public health and police, continue to be shared among the single-tier municipalities after the dissolution.

[33] The region's climate are influenced by various air masses and weather systems from other locations, proximity to Lake Ontario, topography and elevation (e.g. Niagara Escarpment, and Oak Ridges Moraine), and urban and rural land uses.

[38]: 38  During winter, a common type of storm is known as the "Alberta Clipper" which affects the region in which moist Pacific air moves east of the Rocky Mountains to the region, bringing snow that is often followed by the influx of cold continental air afterwards (leads to colder temperatures).

[38]: 38  Towards late summer and early autumn, the remnants of tropical storms and hurricanes may bring strong winds and heavy rainfalls to the area.

[38]: 38  Because the Great Lakes are slower to warm than the land, they keep shoreline areas cooler in spring, leading to prolonged cool weather that persists well into April.

[38]: 39  Temperature inversions occur when warm, moist air from the Gulf of Mexico moves pass the Great Lakes because while the top layers of the Lakes are warmed, the bottom layers remain cool, leading to moisture and airborne pollutants being trapped in the cool air below, humid days, and causing fog, haze, and smog in low laying industrial areas.

[39] This is seen by the tendency for thunderstorms from the west to weaken/dissipate as they approach Toronto Pearson Airport, located in the southeastern part of the region.

[38]: 55  The regional storm track differences include the influence of the Great Lakes on summertime convective precipitation, northernmost extent to where tropical air progresses in winter, and positions of frontal zones in spring and autumn).

[38]: 55  These regional storm track differences are responsible for a slight rain shadow effect for most of Peel except for the northern parts which lie on the windward side and receive more precipitation from frontal systems moving from the west.

[1] According to the 2021 Census, 44% of Peel's population was Christian, 14% was Sikh, 13% was Hindu, 13% was Muslim, 2% belonged to other faiths and 15% had no religious affiliation.

These responsibilities have changed over time, as functions have been uploaded and downloaded to and from the provincial and regional levels, as directed by the Government of Ontario.

Long Term Care Facilities are for seniors and others with long-term health needs: Social Housing The Regional Municipality of Peel owns and operates Peel Living, a social housing corporation, which is the largest landlord in the region one of the largest in Canada.