Thunder Bay: population and official figures
In depth
- Economy, jobs and prices in Thunder Bay: The median total income of households in Thunder Bay was C$77,500 in 2020, as reported in the 2021 Census, 20th lowest of 69 Canadian cities and metropolitan areas on this site; the median for Canada was C$84,000.
- Education in Thunder Bay: 27.3% of people aged 25 to 64 in Thunder Bay held a bachelor's degree or higher in 2021, 20th lowest of 69 Canadian cities and metropolitan areas on this site, below the national 32.9%.
- Poverty and living standards in Thunder Bay: 11.6% of people in private households in Thunder Bay, 12,415 in all, were in low income in 2020 by the low-income measure after tax (LIM-AT), joint 24th highest of 69 Canadian cities and metropolitan areas on this site; the rate for Canada was 11.1%.
What is the population of Thunder Bay?
Statistics Canada estimates that Thunder Bay (the municipality) had 117,671 residents on 1 July 2025, 13th smallest of 69 Canadian cities and metropolitan areas on this site; that was 0.3% more than a year earlier (117,278) and 4.0% more than on 1 July 2021 (113,177).
Source: Statistics Canada · saved copyHow fast is Thunder Bay growing?
Between 1 July 2021 and 1 July 2025 the population of Thunder Bay changed by +4.0%, 4th slowest growth of 69 Canadian cities and metropolitan areas on this site; Canada as a whole grew 8.9%, to 41,651,653, and Thunder Bay held 0.28% of that total.
Source: Statistics Canada · saved copyHow many people lived in Thunder Bay at the 2021 Census?
The 2021 Census counted 108,843 people in Thunder Bay, +0.9% on the 107,909 counted in 2016 (5th slowest growth of 69 Canadian cities and metropolitan areas on this site; Canada: +5.2%). It covers 328 square kilometres, or 332 people per square kilometre.
Source: Statistics Canada · saved copyWhat is the median age in Thunder Bay?
The median age in Thunder Bay was 44.0 years at the 2021 Census, joint 11th oldest of 69 Canadian cities and metropolitan areas on this site (Canada: 41.6); 21.9% of residents were 65 or older and 14.2% were under 15 (Canada: 19.0% and 16.3%).
Source: Statistics Canada · saved copyWho runs Thunder Bay?
In Canada, cities and towns are run by regional or upper-tier municipalities: Mostly councillors sent from lower-tier councils; some heads elected directly. Regional planning, transit, water and policing in some areas.
How local power works in Canada
Cities of a similar size in Canada
- Milton 157,345
- St. Catharines 153,865
- Saguenay 151,972
- Trois-Rivières 149,934
- Kingston 149,527
- Waterloo 142,450
- Ajax 141,111
- St. John's 128,693
- Terrebonne 126,872
- Saanich 126,011
- Delta 124,670
- Brantford 123,521
- Red Deer 115,409
- Lethbridge 113,671
- Chatham-Kent 112,716
- Nanaimo 111,845
Up a level: all cities in Canada · Canada · government and power
Sources
- Statistics Canada: Census Profile, 2021 Census of Population (98-316-X2021001): census subdivisions, selected characteristics (Census Profile SDMX API extract, dataflow DF_CSD, gender total, counts and rates), read 23 October 2026 · saved copy (SHA-256 46d086943a5e…)
- Statistics Canada: Table 17-10-0155-01: Population estimates, July 1, by census subdivision, 2021 boundaries (Web Data Service extract, 2021-2025; request saved as popest-17100155-csd.request.json), read 23 October 2026 · saved copy (SHA-256 95b5a4929299…)
- Statistics Canada: Table 14-10-0459-01: Labour force characteristics by census metropolitan area, three-month moving average, seasonally adjusted (Web Data Service extract: unemployment and employment rates, latest 13 months; request saved as lfs-14100459-cma.request.json, geography names in lfs-14100459-metadata.json), read 23 October 2026 · saved copy (SHA-256 5f4399c9fdfa…)
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