Oakville, Ontario in the context of List of municipalities in Ontario

Mississauga is a Canadian city in the province of Ontario. Situated on the northwestern shore of Lake Ontario in the Regional Municipality of Peel, it borders Toronto (Etobicoke) to the east, Brampton to the north, Milton to the northwest, and Oakville to the southwest. With a population of 717,961 as of 2021, Mississauga is the seventh-most populous municipality in Canada, third-most in Ontario, and second-most in the Greater Toronto Area (GTA) after Toronto itself. However, for the first time in its history, the city's population declined according to the 2021 census, from a 2016 population of 721,599 to 717,961, a 0.5 per cent decrease.

The growth of Mississauga was initially attributed to its proximity to Toronto. However, during the latter half of the 20th century, the city attracted a diverse and multicultural population. Over time, it built up a thriving, transit-oriented central business district of its own; the Mississauga City Centre. Malton, a neighbourhood of the city located in its northeast end, is home to Toronto Pearson International Airport, Canada's busiest airport, as well as the headquarters of many Canadian and multinational corporations. Mississauga is not a traditional city, but is instead an amalgamation of three former villages, two townships, and a number of rural hamlets (a general pattern common to several suburban GTA cities) that were significant population centres, with none being clearly dominant, prior to the city's incorporation that later coalesced into a single urban area.

King's Highway 407, commonly referred to as Highway 407 and colloquially as the "four-oh-seven", is a 400-series highway in the Canadian province of Ontario. Comprising a tolled privately leased segment and a publicly owned segment, the route spans the entire Greater Toronto Area (GTA) around the city of Toronto, travelling through the suburbs of Burlington, Oakville, Mississauga, Brampton, Vaughan, Markham, Pickering, Whitby, and Oshawa before ending in Clarington, north of Orono and Newcastle. At 151.4 kilometres (94.1 mi) long, it is the fourth-longest expressway in Ontario's 400-series network, after Highways 417, 400, and 401. The tolled segment between Burlington and Brougham in Pickering is leased to and operated by the 407 ETR Concession Company Limited and is officially known as the 407 Express Toll Route (407 ETR). It begins at the Freeman Interchange between the Queen Elizabeth Way (QEW) and Highway 403 in Burlington; the highway travels 108.0 km (67.1 mi) across the urban GTA to Brock Road in Pickering. East of Brock Road, the freeway continues east as Highway 407 (referred to as Highway 407 East during development to distinguish it from 407 ETR), a route operated by the provincial government and formerly tolled, for 43.4 km (27.0 mi) to Highway 35/115 in Clarington. The route interchanges with nine freeways in Ontario: the QEW, Highway 403, Highway 401, Highway 410, Highway 427, Highway 400, Highway 404, Highway 412, and Highway 418. 407 ETR is an electronically operated toll highway; there are no toll booths along the route. Distances are calculated automatically using transponders or automatic number-plate recognition, which are scanned at entrance and exit portals.

Highway 407 was planned in the late 1950s as a freeway bypassing Toronto's segment of Highway 401, the busiest highway in North America. However, construction did not begin until 1987. During the early 1990s, the provincial government proposed tolling the highway to alleviate a revenue shortfall. The central sections of Highway 407 opened in 1997, and the remaining sections were built quickly over the following four years, with the final segment opening in mid-2001. Despite being included in the 400-series network, the Highway 407 ETR section is not considered part of the provincial highway network as it is now privately operated. The segment is operated privately under a 99-year lease agreement signed with the Conservative provincial government, which was sold in 1999 for about C$3.1 billion to a consortium of Canadian and Spanish investors operating under the name 407 International Inc. The privatization of the Highway 407 ETR section has been the source of significant criticism, especially regarding increases in tolls, plate denial, and false charges. In addition, the safety of segments built after the sale of the freeway has been called into question.

The Regional Municipality of Halton, or Halton Region, is a regional municipality in Ontario, Canada, located in the Golden Horseshoe of Southern Ontario. It comprises the city of Burlington and the towns of Oakville, Milton, and Halton Hills. Policing in the Region is provided by the Halton Regional Police Service. The regional council's headquarters are located in Oakville. Burlington, Oakville, and Milton are largely urban and suburban, while Halton Hills is more rural.

Halton is part of the Greater Toronto Area (GTA), although it is the only regional municipality in the GTA that is not situated directly adjacent to Toronto’s city proper. However, the region is split between the census metropolitan areas (CMAs) of Toronto and Hamilton. Burlington is part of the Hamilton CMA, while the rest of the region is part of the Toronto CMA.