townships of Bedford, Loughborough, Portland, and Storrington. Its unknown if the township and the village had any connections with the same name due to its close proximity. We invest in high quality companies, primarily in the food, industrial and services industries. You are on Twitter Mobile because you are using an old version of Firefox. South Frontenac is a township in, frontenac County in eastern, ontario, Canada. Demographics edit, canada census South Frontenac, Ontario community profile, population: 18,113 (-0.) 18,227 (11.). Land area: 971.68 km2 (375.17 sq mi) 941.28 km2 (363.43 sq mi) Population density:.6/km2 (48/sq mi).4/km2 (50/sq mi) Median age:.9 (M:.6, F:.2) Total private dwellings: Median household income: 70,297 References: earlier 6 According to the Canada 2006 Census : 7 Mother tongue: English as first language:.5 French.