Total population

7,386

1.1 % year-over-year change

Median household income

$86,000/yr

Private dwellings

3,216

St. Marys population

How many people live in St. Marys

St. Marys is home to 7,386 residents, based on Statistics Canada's 2024 population estimate. Of these, 47.6% identify as male and 52.4% as female.

Total population

7,386

1.1% year-over-year change

Population density

593.8/km2

Gender ratio

Male

47.6%

3,515

Female

52.4%

3,875

	Value	Percent
Male	3,515	47.6%
Female	3,875	52.4%

A larger population often brings more rental variety and a busier pace of life. The gender breakdown, namely the ratio of men to women in the area, offers clues about the community’s vibe and social landscape.

Age demographics

The average age in St. Marys is 46.1. Children under 15 make up 14.4% of the population, while youth and young adults account for 9.9%. Those in their working years are spread across the following age groups: 10.8% are 25 to 34, 10.8% are 35 to 44, and 11.7% are 45 to 54. Adults nearing retirement—aged 55 to 64—represent 16% of the population, while seniors 65 and over make up 26.4%.

Average age

46.1

Age breakdown

Under 15: 14.4%
15 to 24: 9.9%
25 to 34: 10.8%
35 to 44: 10.8%
45 to 54: 11.7%
55 to 64: 16%
Over 65: 26.4%

	Value	Percent
Under 15	1,065	14.4%
15 to 24	730	9.9%
25 to 34	795	10.8%
35 to 44	800	10.8%
45 to 54	865	11.7%
55 to 64	1,180	16%
Over 65	1,955	26.4%

Age distribution gives you a glimpse into who makes up the area. Younger communities might feel more energetic or student-friendly, while older ones tend to be calmer and more settled. A mix of age groups usually means a balance of parks, schools, healthcare, and other services for all walks of life.

Residence status

In St. Marys, 91.4% of residents were born in Canada, while 8.5% have settled here from abroad. Another 0.1% are non-permanent residents, such as temporary workers or international students.

Immigration status

Non-immigrants: 91.4%
Immigrants: 8.5%
Non-permanent residents: 0.1%

	Value	Percent
Non-immigrants	6,565	91.4%
Immigrants	610	8.5%
Non-permanent residents	10	0.1%

Minority breakdown

Minorities: 4.5%
Non-minorities: 95.5%

	Value	Percent
Minorities	325	4.5%
Non-minorities	6,860	95.5%

Knowing how many people in the area are newcomers, temporary residents, or Canadian-born can give you a feel for how established or internationally connected a community is. It may also hint at the kind of services, food, and cultural touchpoints you’ll find nearby.

Languages used in St. Marys

English: 99.3%
French: 0.6%
English and French: 0%
Neither English nor French: 0.1%

	Value	Percent
English	7,130	99.3%
French	45	0.6%
Neither English nor French	5	0.1%

Primary languages spoken

According to the latest Census data, 99.3% of people in St. Marys speak English as their primary language, 0.6% communicate mainly in French, are bilingual, and 0.1% use other languages.

Language use shapes everything from signage to services. Whether you're looking for bilingual support or just curious about the local vibe, these stats give a quick peek at how people connect day-to-day.

Households in St. Marys

A peek inside St. Marys households

St. Marys has 3,130 households, with an average of 2.3 people living in each. One-person households make up 28.3% of all homes, while 40.7% are shared by two people. Three-person households represent 12.5%, and homes with four or more people account for 18.5% of the total.

Households stats

Total households

3,130

Average people per household

2.3

1 person: 28.3%
2 persons: 40.7%
3 persons: 12.5%
4 persons: 12.3%
5 or more persons: 6.2%

	Value	Percent
1 person	885	28.3%
2 persons	1,275	40.7%
3 persons	390	12.5%
4 persons	385	12.3%
5 or more persons	195	6.2%

Household size can reveal a lot about how people live in the area. More one- and two-person homes might hint at a mix of young professionals or empty nesters, while larger households often reflect families or multi-generational setups. It’s a good indicator of the kinds of rentals and living spaces you'll find nearby.

Housing in St. Marys

The housing landscape of St. Marys

St. Marys has a total of 3,216 private dwellings. Among the occupied dwellings, 69.8% are single-detached houses, 29.1% are attached homes such as townhouses or semi-detached units, and 1.1% are apartments. When it comes to space, St. Marys offers a variety of home sizes: 8% of occupied homes have 1 bedroom or less, 70% have 2–3 bedrooms, and 22.2% have 4 or more bedrooms.

Total private dwellings

3,216

Housing types

Single-detached homes: 69.8%
Attached homes: 29.1%
Apartments: 1.1%
Movable homes: 0%

	Value	Percent
Single-detached homes	2,180	69.8%
Attached homes	910	29.1%
Apartments	35	1.1%

Housing size

1 or no bedrooms: 8%
2 or 3 bedrooms: 70%
4 or more bedrooms: 22.2%

	Value	Percent
1 or no bedrooms	240	8%
2 or 3 bedrooms	2,195	70%
4 or more bedrooms	695	22.2%

Homes built since 2011

465

The age of buildings in St. Marys

About 30.9% of homes were built before 1945, followed by 6.9% between 1946 and 1960. Another 6.4% went up in the 1960s, 10.2% in the 1970s, and 6.9% during the 1980s. Between 1991 and 2000, 12.4% of homes were added, and 11.5% were developed between 2001 and 2010.

Construction year breakdown by decade

	Value	Percent
Before 1945	970	30.9%
Between 1946 and 1960	215	6.9%
Between 1961 and 1970	200	6.4%
Between 1971 and 1980	320	10.2%
Between 1981 and 1990	215	6.9%
Between 1991 and 2000	390	12.4%
Between 2001 and 2010	360	11.5%
After 2011	465	14.8%

As a renter, knowing when homes were built helps you understand the potential condition and design of rental units. Newer builds may have more contemporary layouts, while older homes can offer character or larger lots, depending on the area.

St. Marys occupancy rates

In St. Marys, there are 3,128 occupied private dwellings, of which 81% are owner-occupied and 19% are rented. Meanwhile, 88 dwellings sit vacant.

Occupied dwellings

3,128

Occupancy breakdown

Rented households: 19%
Owned households: 81%

	Value	Percent
Rented households	595	19%
Owned households	2,535	81%

Unoccupied dwellings

Understanding whether homes are owned or rented gives insight into the housing market’s stability and flexibility. High ownership rates may point to longer-term residents and more stable neighbourhoods, while a greater share of rentals can indicate mobility, availability, or housing diversity. Vacancy levels can also hint at supply-and-demand dynamics for renters.

Shelter costs

In St. Marys, homeowners pay a median of $1,050 per month on shelter costs, while renters spend around $970. About 88% of households spend less than 30% of their income on housing, while 12% exceed that threshold.

Median monthly shelter costs for owned dwellings

$1,050

Median monthly shelter costs for rented dwellings

$970

Income spent on housing

<30% on shelter: 88%
≥30% on shelter: 12%

	Value	Percent
<30% on shelter	2,745	88%
≥30% on shelter	375	12%

Shelter cost includes all monthly expenses tied to housing—like rent or mortgage, property taxes, utilities, and additional fees. Owners usually cover a wider range of costs, while renters typically just pay rent plus basic services. Comparing these numbers gives a clearer view of what living in the area actually costs, and whether households are stretched beyond the 30% affordability benchmark.

Education in St. Marys

St. Marys education at a glance

In St. Marys, educational attainment varies across the community. About 17.5% of residents have no formal diploma, while 32.1% have completed high school and 5.1% hold an apprenticeship certificate. Meanwhile, 25.2% have graduated from college. Finally, 1.6% earned a non-bachelor university diploma, and 18.4% hold a university degree.

Education level

	Value	Percent
No diploma	1,075	17.5%
High school diploma	1,970	32.1%
Apprenticeship diploma	315	5.1%
College diploma	1,550	25.2%
University diploma (below bachelor diploma)	100	1.6%
University degree	1,130	18.4%

Education levels give a snapshot of the local talent pool and job readiness. A strong share of college and university graduates can mean better access to skilled jobs, while trades and apprenticeship diplomas often support hands-on industries. For renters, these stats help paint a picture of the economic opportunities and workforce makeup in the area.

Income in St. Marys

How much people earn in St. Marys

In St. Marys, the median household income sits at $86,000, while the median after-tax household income is $75,500.

Median household income

$86,000/year

Median after-tax household income

$75,500/year

Household income—especially after tax—offers one of the clearest indicators of how affordable a place might feel. It also helps renters understand earning power in the area, whether they're budgeting for rent or comparing communities with similar price tags. Local income trends can reveal whether the economy is growing, steady, or facing challenges.

St. Marys income by age

Young adults in St. Marys between 15 and 24 have a median income of $18,200, often reflecting part-time or early career work. For those aged 25 to 34, when many are advancing in their jobs, the figure rises to $48,400, and by 35 to 44 it reaches $61,200. Among individuals 45 to 54, the median wage is $61,200, followed by $50,000 for those in their pre-retirement years. Finally, residents over 65, many of whom are already retired, typically earn $35,600.

Income breakdown by age

	Value
15 - 24	18,200
25 - 34	48,400
35 - 44	61,200
45 - 54	61,200
55 - 64	50,000
Over 65	35,600

Employment in St. Marys

Workforce and job sectors in St. Marys

In St. Marys, 3,670 residents are part of the labour force, with an unemployment rate of 10.1%. The local economy spans a wide range of sectors. Notably, sales and service, trades and transport, and business, finance and administration employ the largest shares of the working population, shaping the city's job market.

Workforce demographics

Labour force

3,670

Unemployment rate

10.1%

Major job markets

	Value	Percent
Management	45	1.2%
Business, finance and administration	500	13.7%
Natural and applied sciences	225	6.2%
Health	340	9.3%
Education, law, community and government services	375	10.3%
Art, culture, recreation and sport	115	3.2%
Sales and service	855	23.4%
Trades and transport	625	17.1%
Natural resources and agriculture	105	2.9%
Manufacturing and utilities	465	12.7%

Knowing what kinds of jobs dominate the area can help you understand local culture, income levels, and day-to-day rhythms. When looking for a community that suits your lifestyle, these labour stats offer helpful clues.

Transportation in St. Marys

How people get around in St. Marys

In St. Marys, the average commute is 17 minutes. The remaining 1.2% use other methods, such as scooters or motorcycles.

Average commute time

17 min

Travel time

Less than 15 minutes: 53.1%
15 to 29 minutes: 24.5%
30 to 44 minutes: 12.9%
45 to 59 minutes: 5.6%
More than 60 minutes: 3.9%

	Value	Percent
Less than 15 minutes	1,505	53.1%
15 to 29 minutes	695	24.5%
30 to 44 minutes	365	12.9%
45 to 59 minutes	160	5.6%
More than 60 minutes	110	3.9%

Means of transportation

	Value	Percent
By car, truck or van	2,580	91%
By bicycle/by walking	220	7.8%
By other methods	35	1.2%

Commute trends hint at both the layout and vibe of a place. If most people drive or take transit, the area may be more spread out. Shorter commutes suggest convenient access to jobs, while longer ones may confirm the area’s low-density layout.

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FAQs about St. Marys demographics

What is the current total population in St. Marys?

St. Marys has a population of 7,386, according to Statistics Canada’s official 2024 figure, as published in their Annual Demographic Estimates: Subprovincial Areas report. This represents a +1.1% change compared to the previous year.

What is the population density of St. Marys?

St. Marys has a population density of 593.8 people per square kilometre.

What is the gender distribution in St. Marys?

St. Marys has the following gender distribution:

47.6% males (3,515 residents)
52.4% females (3,875 residents)

What is the age distribution of St. Marys residents?

The age distribution of St. Marys residents is as follows:

Under 15: 14.4% (1,065 residents)
15-24: 9.9% (730 residents)
25-34: 10.8% (795 residents)
35-44: 10.8% (800 residents)
45-54: 11.7% (865 residents)
55-64: 16% (1,180 residents)
Over 64: 26.4% (1,955 residents)

What is the population distribution by immigration status in St. Marys?

Here’s the population distribution by immigration status in St. Marys:

91.4% non-immigrants (6,565 residents)
8.5% immigrants (610 residents)
0.1% non-permanent residents (10 residents)

What are the primary languages spoken in St. Marys?

Here’s a breakdown of the languages spoken in St. Marys:

English: 99.3%
French: 0.6%
English and French: 0%
Neither English nor French: 0.1%

What is the typical household size in St. Marys?

The typical household size in St. Marys is 2.3 people.

What is the median household income in St. Marys?

The median household income in St. Marys is $86,000 annually, according to Statistics Canada’s latest release—Census Profile, 2021 Census of Population.

What is the educational attainment level of St. Marys residents?

The educational attainment breakdown in St. Marys is as follows:

No diploma: 17.5% (1,075 residents)
High school diploma: 32.1% (1,970 residents)
Apprenticeship diploma: 5.1% (315 residents)
College diploma: 25.2% (1,550 residents)
University diploma (below bachelor): 1.6% (100 residents)
University degree: 18.4% (1,130 residents)

What are the most common occupations in St. Marys?

The most common occupations in St. Marys fall within the sectors listed below:

Art, culture, recreation and sport: 3.2%
Business, finance and administration: 13.7%
Education, law, community and government services: 10.3%
Health: 9.3%
Management: 1.2%
Manufacturing and utilities: 12.7%
Natural and applied sciences: 6.2%
Natural resources and agriculture: 2.9%
Sales and service: 23.4%
Trades and transport: 17.1%

Data source & methodology

Demographic data shown in this section was gathered from the latest census data from Statistics Canada (2021), with the total population figure reflecting the official 2024 population estimate.
Census aggregated data represented here is extracted from Data Tables, by topic, at the census subdivision area level.
Differences may be found between the totals of the various categories due to multiple variables.
The information is updated as soon as new data is made available. No representation, guarantee or warranty is made as to the accuracy or completeness of information.

Page last updated: September 2025

St. Marys, ON demographics:population, income, and more