Sarnia Population 2026
Sarnia has a population of 72,125, making it the #93 biggest city in 🇨🇦 Canada, located in Ontario. Roughly 0.2% of Canada's population lives here. It is about 39× smaller than Toronto, the country's biggest city.
Population (city proper)
72,125
Rank in Canada
#93
Coordinates
42.98°N, 82.40°W
~185 m elevation · America/Toronto
Distance to capital (Ottawa)
599 km
372 miles, straight line
Other big cities in Ontario
Cities near Sarnia
FAQ
What is the population of Sarnia?
Sarnia has a population of 72,125 (city proper, latest official figure via GeoNames), making it the #93 biggest city in Canada.
What region is Sarnia in?
Sarnia is located in Ontario, Canada.
Is Sarnia the capital of Canada?
No, the capital of Canada is Ottawa, about 599 km away.
Sources & notes
Population refers to the city proper (municipal boundaries), not the metropolitan area. Source: GeoNames (CC BY 4.0), retrieved 2026-07-07. Country data: UN World Population Prospects 2024.