European-Canadian growth led to the eventual displacement of the Mississaugas. In 1847, the government relocated them to a reserve in the Grand River Valley near present-day Hagersville.
In 1873, in light of the continued growth seen in this area much as a result of the many railway lines passing through the township which spurred on industry, the Toronto Township Council was formed to oversee the affairs of the various villages that were unincorporated at that time. The Council's responsibilities included road maintenance, the establishment of a police force, and mail delivery service. Except for small villages, some gristmills and brickworks served by railway lines, most of present-day Mississauga was agricultural land, including fruit orchards, through much of the 19th and first half of the 20th century.
Cottages were constructed along Lake Ontario in the 1920s as weekend getaway houses for city dwellers.
Malton Airport opened in 1937, which would become Canada's busiest, Lester B. Pearson International Airport.
The Queen Elizabeth Way (QEW) highway, one of the first controlled access highways in the world opened from Highway 27 to Highway 10, Port Credit, in 1935 and later to Hamilton and Niagara in 1939. The first prototypical suburban developments occurred around the same time, in the area south of the Dixie Road/QEW interchange. Development in general moved north and west from there over time and around established towns. Large-scale developments, such as in Meadowvale and Erin Mills, sprang up in the 1960s and 70s.
With the exception of Port Credit and Streetsville, the township settlements of Lakeview, Cooksville, Lorne Park, Clarkson, Erindale, Sheridan, Dixie, Meadowvale Village, and Malton were amalgamated by a somewhat unpopular provincial decree in 1968 to form the Town of Mississauga. The town name was chosen by plebiscite over "Sheridan". Political will, as well as a belief that a larger city would be a hegemony in
