South Frontenac
- Province:
- Ontario
South Frontenac is a city located in Ontario, Canada with a current estimated population of 21,513. The population was recorded at 20,188 in the 2021 Canadian Census, and was previously recorded at 18,646 in the 2016 census. This is a change in population of 1,542, which is an annual growth rate of 1.6%.
