Mississauga is a Canadian city in Southern Ontario on the shores of Lake Ontario, located in the Regional Municipality of Peel, in the western part of the Greater Toronto Area. The city has a population of 713,443 as of the Canada 2011 Census, and is Canada's sixth-most populous municipality.Developed as a suburb of Toronto, Mississauga's growth is attributed to its proximity to that city. It is the largest suburb in Anglo-America by population. The city was debt-free and had not borrowed money between 1978 and 2011. Mississauga had been the beneficiary of federal infrastructure funding; however as of 2012, it has to borrow money to build new capital projects. Residents of the city are called Mississaugans.

The city is placed fourth in 'large cities of the future' by financial publication fDi Magazine for North and South American cities. Mississauga was also rated as Canada's 11th best city to live in terms of prosperity according to MoneySense magazine. It is the fourth most walkable large city in Canada according to Walk Score. Toronto Pearson International Airport, Canada's busiest airport is located in the city, and it is the location of several major corporate headquarters for Canada such as Walmart Canada, Microsoft and General Electric.

At the time of the arrival of the Europeans in the 1600s, both Iroquoian and Algonquian-speaking peoples already lived in the Credit River Valley area. One of the First Nations groups the French traders found around the Credit River area were the Algonquian Mississaugas, a tribe originally from the Georgian Bay area. The name "Mississauga" comes from the Anishinaabe word Misi-zaagiing, meaning " Great River-mouth." By 1700 the Mississaugas had driven away the Iroquois yet during the Beaver Wars they played a neutral or post-emptive role.Toronto Township, consisting of most of present-day Mississauga, was formed on August 2, 1805 when officials from York (what is now Toronto) purchased 84,000 acres (340 kmĀ²) of land from the Mississaugas. In January 2010, the Mississaugas and the federal government settled a land claim, in which the band received $145,000,000, as more just compensation for their land and lost income.