The southernmost province in Canada is called Ontario. situated near Canada’s center Canada’s most populous province is Ontario. It is the second-largest province in terms of total area in Canada as of the 2021 census, with 38.5 percent of the inhabitants living there (behind Quebec) Among all Canadian provinces and territories, Ontario has the fourth-largest total area. It is the home to Ontario’s provincial capital, Toronto, as well as the capital of the country, Ottawa.