City (pop., 2001: 612,925), southeastern Ontario, Canada.
Situated at the western end of Lake Ontario , southwest of Toronto , it was settled in the early 19th century on land purchased from the Mississauga Indians. Mississauga became a town in 1968 and a city in 1974. Both a residential suburb of Toronto and an important industrial centre, it is also the site of the Lester B. Pearson International Airport.