St. Catharines Population 2026
St. Catharines has a population of 136,803, making it the #47 biggest city in 🇨🇦 Canada, located in Ontario. Roughly 0.3% of Canada's population lives here. It is about 20× smaller than Toronto, the country's biggest city.
Population (city proper)
136,803
Rank in Canada
#47
Coordinates
43.17°N, 79.24°W
~102 m elevation · America/Toronto
Distance to capital (Ottawa)
376 km
233 miles, straight line
Other big cities in Ontario
Cities near St. Catharines
- Niagara Falls99,818 people · ~16 km away
- Welland52,293 people · ~21 km away
- Fort Erie30,710 people · ~39 km away
- Stoney Creek76,382 people · ~43 km away
- Oakville213,759 people · ~47 km away
- Hamilton569,353 people · ~50 km away
FAQ
What is the population of St. Catharines?
St. Catharines has a population of 136,803 (city proper, latest official figure via GeoNames), making it the #47 biggest city in Canada.
What region is St. Catharines in?
St. Catharines is located in Ontario, Canada.
Is St. Catharines the capital of Canada?
No, the capital of Canada is Ottawa, about 376 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.