Photo: Gogerr · CC BY-SA 4.0A median age of 48.4: St. Marys is older than 81% of Canadian towns
Compared with 19% across Canada’s towns, 27% of residents are 65 or over here. Nearly one in ten residents lived at another address a year earlier. Renter households are rarer here than in 64% of Canadian towns. Statistics Canada puts St. Marys’s population at 8,203 for July 2025.
Slower growth than 66% of Canadian towns: St. Marys changed by +2% since 2016
All figures are the 2021 Census’s unless another date is shown. Two census counts, five years apart, and Statistics Canada’s newest estimate.
Change, 2016 to 2021
Across Canada’s towns, half of towns changed by more than +4%; across Ontario’s towns, by more than +6%. By July 2025, the estimate had risen a further 11%.
St. Marys ranks below 68% of Canadian towns on children under 15: 14%
Residents by five-year age band, each beside the typical town (the tick).
Here 9.9% of residents are aged 15 to 24, where the figure across Canada’s towns is 11%. The biggest five-year age group is 55–59, with 8.4% of residents.
Median age of Canadian towns of 2,500+
■ St. Marys, 48.4. The typical town is 42.
Broad ages · share of residents
Women and men · all residents
52% women, 48% men
About 91 men for every 100 women. Women live longer than men, so towns with many older residents have more women.
2.3 people per household, fewer than in 64% of Canadian towns
Household types, then household sizes.
Against Ontario’s towns and Canada’s towns
People per household
Canada’s towns.
28% of households are one person living alone. Nothing unusual on one-parent families: 8%, close to the figure across Canada’s towns.
More married residents 15 and over than 63% of Canadian towns: 50%
Married, common-law, single: residents 15 and over.
Marital status · residents 15 and over
Single and never married: 23% of adults, against a typical 27%. 10% of residents 15 and over live common-law.
A higher share of households in single-detached houses than 58% of Canadian towns, at 70%
Dwelling types, tenure and age of the housing. Prices, rents and shelter costs are on Cost of living.
Type of home
Owners and renters · share of households
When homes were built · share of homes
38% of homes were built before 1961 and 26% in 2001 or later. More households in buildings of five or more storeys than in just over three fifths of Canadian towns: 1.1%. Elsewhere, 64% of households live in a single-detached house across Canada’s towns.
A median household income of $86,000 a year
Incomes are 2020’s, the census’s reference year, and include pandemic benefits such as CERB. Income per household, before tax, with the groups it falls into.
Households by income · share of households
St. Marys’s median household took in $86,000 before tax, about the median across Canada’s towns ($86,000). $91,600 is the median household income across Ontario’s towns. In 2020, 21% of income recipients drew a COVID-19 emergency or recovery benefit; the typical town had 28%.
8.5% of residents are immigrants
Where immigrants were born and when they came, and how recently residents moved in.
Immigrants, by continent of birth · share of all residents; the bar runs to 35%
When immigrants arrived · share of immigrants
Citizenship and moving · share of residents
The share of residents without Canadian citizenship is 2.3%, against 5.8% across Canada’s towns. Immigrants here were most often born in Europe (56%), then in the Americas (24%). Fewer immigrants than in 68% of Canadian towns: 8.5%.
38% of residents said they have no religion, more than in 60% of Canadian towns
Visible minority and Indigenous identity, then religion.
Visible minority and Indigenous identity · all residents
Religion · all residents
Across Canada’s towns, 2.8% of residents have an Indigenous identity; in St. Marys, 1.4%. In St. Marys, 4.5% of residents belong to a visible minority. Typically, 35% of residents said they have no religion across Canada’s towns.
English is the mother tongue of 94%, and 3.8% speak French as well
The official languages residents can speak, and the ones they learned first.
Can hold a conversation in · share of all residents
Mother tongue · share of all residents
Residents whose mother tongue is French are about as common here as across Canada’s towns, at 0.8%. At home: English 98%, French 0.2%. St. Marys has fewer bilingual residents than 89% of Canadian towns, at 3.8%.
Fewer degree holders aged 25 to 64 than 59% of Canadian towns: 23%
Highest certificate, diploma or degree of residents aged 25 to 64.
Highest qualification · residents 25 to 64
No diploma or degree: 8.3% here, 9.5% in the typical town. The usual figure: 27% of residents 25 to 64 hold a bachelor’s degree or higher across Canada’s towns.
54% of residents 15 and over were in work
The census counted work in May 2021, mid-pandemic, so read these rates as a pandemic snapshot. Work, briefly: employment, unemployment, participation and working from home. Jobs, industries and the commute are on Work & commute.
Fewer work here than in the typical town: 54%, against 58% across Canada’s towns. 27% of residents are 65 or over.
Among 41 towns of 8,084 to 8,327 people, the 10th oldest
The Canadian towns closest in population, from youngest to oldest.
The youngest of these towns is South Pointe, at 30.5; the oldest, Haliburton Village, is at 59.2. The closest ages to St. Marys’s belong to Rigaud (46.4), Lawson Heights (48), Clinton (48.8) and Otonabee-South Monaghan (49.2).
Every nearby town is younger than St. Marys
The closest towns, coloured by how old their residents are.
| Town | People | Away | Median age | 65+ | Immigrants |
|---|---|---|---|---|---|
| St. Marys | 8,203 | — | 48.4 | 27% | 8.5% |
| Perth South | 4,055 | 4.7 km | 44.8 | 19% | 5.7% |
| Stratford | 36,097 | 18.3 km | 46 | 24% | 11% |
Health, work, housing and schools
What this data can and can’t tell you
- What these tables don’t give. Some things the page can’t show: the Census Profile asks nothing about unpaid care, cars or internet access, and gives no change by age since 2016. Ethnic origins beyond visible minority and Indigenous identity aren’t charted.
- The census’s own words. Indigenous identity, immigrant status and religion are as residents answered them. “Visible minority” follows the Employment Equity Act, meaning people other than Indigenous peoples who are non-white in colour or race. We compare these figures across towns; none is a label for a town.
- Against Ontario’s towns and Canada’s towns. A figure here is set beside two middles, the median across Ontario’s places of 2,500 people or more and the median across all Canadian towns that size; reserves and entire cities are excluded from both.
Questions about St. Marys’s residents
What is the median income in St. Marys?
Median total household income in St. Marys was $86,000 in 2020, against a median of $86,000 across Canada’s towns.
What is the population of St. Marys?
The latest figure is an estimate: 8,203 residents in July 2025. At the 2021 Census, St. Marys counted 7,386, 2% more than 2016.
What is the average age in St. Marys?
Half the residents are older than 48.4 and half younger, older than 81% of Canadian towns; 14% are children under 15 and 27% are 65 or over.
Is St. Marys bilingual?
Across Canada’s towns a typical 7.5% are bilingual; here 3.8% are. Another 0% speak only French and 96% only English, and French is the first language of 0.8%.
How diverse is St. Marys?
Across Canada’s towns a typical 17% are immigrants; here, 8.5%. A visible minority makes up 4.5% and Indigenous residents 1.4%.
What religion are people in St. Marys?
Most often Christian (60%) or no religion (38%); other religions make up 1.5%.
Is St. Marys good for families?
Children under 15 are 14% of residents, against 16% across Canada’s towns. Couple families make up 58% of households and one-parent families 8%. Schools near St. Marys are on its Schools page.
Sources: Statistics Canada, Census Profile, 2021 Census of Population · Statistics Canada, population estimates for 1 July 2025 (table 17-10-0155). Under the Statistics Canada Open Licence.
Adapted from Statistics Canada (Census of Population 2021, population estimates 2025, 2021 census boundaries) under the Statistics Canada Open Licence; this does not constitute an endorsement by Statistics Canada. Neighbourhood names in some cities © OpenStreetMap contributors (ODbL).