Oakville is a town and lower-tier municipality in Halton Region, Ontario, Canada. generally seen as a commuter suburb of Toronto, it is locate…Oakville is a town and lower-tier municipality in Halton Region, Ontario, Canada. generally seen as a commuter suburb of Toronto, it is located on Lake Ontario between Toronto and Hamilton. At its 2021 census the town had a population of 213,759, with an estimated 233,700 people as of 2024, making it Ontario's largest town. Oakville is part of the Greater Toronto Area, the largest urban area in Canada.