Ontario (/ÉnËtÉÉrioÊ/ ( listen); French pronunciation: â[ÉÌtaÊjo]), one of the 13 provinces and territories of Canada, is located in east-central Canada.[7][8] It is Canada's most populous province[9] accounting for nearly 40 percent[10] of the country's population, and is the second-largest province in total area.