Photo: P199 · CC BY-SA 4.0Mercier: 22% of residents are under 15, above 92% of Canadian towns
Half of Mercier’s residents are under 39.2, younger than in 69% of Canadian towns. The town had about 16,036 residents in July 2025, by Statistics Canada’s estimate, and 5,400 households at the 2021 Census. One-person households: a fifth of the total. Where just over a third of residents said they have no religion across Canada’s towns, Mercier has 26%.
What stands out about the people of Mercier
A bilingual town
54% of residents can hold a conversation in both English and French, more than in 92% of Canadian towns; 43% speak French only and 2.9% English only. English & French ↓
A town of families
Children under 15 are 22% of residents, more than in 92% of Canadian towns. Households average 2.7 people, and 9.8% are one-parent families. Ages ↓
Common-law couples
Common-law unions take in 27% of adults, more than in 91% of Canadian towns, while 37% are married. Couples ↓
Growing faster than most
Mercier went from 13,115 people in 2016 to 14,626 in 2021, +12%: faster growth than in 86% of Canadian towns. Population change ↓
Written from the data on this page: Statistics Canada, 2021 Census.
54% of residents speak English and French, a share 92% of Canadian towns don’t reach
Figures are from the 2021 Census unless dated otherwise. Knowledge of the two official languages, first languages, and the language of home.
Can hold a conversation in · share of all residents
Mother tongue · share of all residents
Residents whose mother tongue is English: 7.1% here and 66% across Canada’s towns. For bilingual residents, the comparison across Canada’s towns is 7.5%.
Faster growth than 86% of Canadian towns: Mercier changed by +12% since 2016
The census counts of 2016 and 2021, the estimate after them, and the change set beside other towns.
Change, 2016 to 2021
Across Canada’s towns, the typical town changed +4%; across Quebec’s towns, +4%. Statistics Canada’s estimate for July 2025 is 10% higher again.
14% of residents are 65 or over, below 79% of Canadian towns
Age bands of five years, the town’s bars against the typical town’s ticks.
40–44 is the most common age band: 8.3% of residents, 1.3 times the share across Canada’s towns. Typically, 19% of residents are 65 or over across Canada’s towns. Locally, just over one in ten residents are aged 15 to 24.
Median age of Canadian towns of 2,500+
■ Mercier, 39.2. The typical town is 42.
Broad ages · share of residents
Women and men · all residents
51% women, 49% men
About an even split.
2.7 people per household, more than in 76% of Canadian towns
Household types, then household sizes.
Against Quebec’s towns and Canada’s towns
People per household
Canada’s towns.
The figure for one-parent families is 9.8% in Mercier and 8.2% across Canada’s towns.
In Mercier, 27% of residents 15 and over live common-law, more than in 91% of Canadian towns
Residents 15 and over by marital status; the census counts common-law couples separately.
Marital status · residents 15 and over
Across Canada’s towns, 46% of residents 15 and over are married; in Mercier, 37%. Common-law partners make up 11% across Canada’s towns.
Mercier sits below 64% of Canadian towns for renter households (19%)
Occupied homes by type, by owners and renters, and by when they were built. 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
Newer homes outnumber old: 41% date from 2001 or later, 8% from before 1961. Households in buildings of five or more storeys are rarer here than in nearly three quarters of Canadian towns. Set beside that, 25% of households rent their home across Canada’s towns. Here 71% of households live in a single-detached house, where the figure across Canada’s towns is 64%.
The middle household earns $100,000 a year
Census incomes are for 2020, the year before the census, when CERB and other pandemic benefits topped up many households. What households took in before tax, at the middle and across income groups.
Households by income · share of households
The middle household in Mercier had $100,000 before tax, 16% above the median across Canada’s towns ($86,000). Within Quebec’s towns, the household in the middle had $74,000. Pandemic payments such as CERB reached 28% of income recipients here, against 28% in the typical town.
12% of residents are immigrants
Immigrants, newcomers and movers.
Immigrants, by continent of birth · share of all residents; the bar runs to 20%
When immigrants arrived · share of immigrants
Citizenship and moving · share of residents
Against a figure of 17% across Canada’s towns, the share of immigrants in Mercier comes in at 12%. Immigrants here were most often born in Africa (45%), then in Europe (26%). Few places have so few residents without Canadian citizenship: 3.2% here, fewer than in 64% of Canadian towns.
70% said they are Christian and 26% that they have no religion
Visible minority and Indigenous identity, then religion.
Visible minority and Indigenous identity · all residents
Religion · all residents
Other faiths: Muslim (3%). Compared with 15% across Canada’s towns, 13% of residents belong to a visible minority here.
A smaller share of 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
At the other end, 9.7% hold no certificate, diploma or degree, against a typical 9.5%. As a reference point, 27% of residents 25 to 64 hold a bachelor’s degree or higher across Canada’s towns.
68% of residents 15 and over were in work
Counted in May 2021, during COVID-19, these rates catch the job market before it had recovered. The census’s labour rates, in brief. Jobs, industries and the commute are on Work & commute.
Across Canada’s towns the typical rate is 58%, below this 68%.
In its size band (15,669 to 16,403), the 16th youngest of 41 towns
Median age of the Canadian towns nearest in population; hover a dot.
Between Evergreen (32.8) and Vieux-Moulin (54.3) lies the rest of the group. Glen Cairn (38.7), Côte-Saint-Paul (38.7), Lansing-Westgate (39.6) and Sainte-Anne-des-Plaines (39.6): the towns nearest Mercier in median age.
Nearby, 4 of 5 towns have older populations than Mercier
The closest towns, coloured by how old their residents are.
| Town | People | Away | Median age | 65+ | Immigrants |
|---|---|---|---|---|---|
| Mercier | 16,036 | — | 39.2 | 14% | 12% |
| Châteauguay | 53,508 | 5.1 km | 42.8 | 20% | 21% |
| Saint-Isidore | 2,889 | 5.7 km | 40.4 | 17% | 3% |
| Léry | 2,817 | 6.2 km | 46 | 22% | 7.5% |
| Sainte-Martine | 5,884 | 7.6 km | 41.2 | 18% | 2% |
| Kahnawake | 11,142 | 8.7 km | — | — | — |
| Saint-Urbain-Premier | 1,380 | 10.0 km | 38.8 | 16% | 1.9% |
Health, work, housing and schools
What this data can and can’t tell you
- What these tables don’t give. For origins the charts stop at visible minority and Indigenous identity, and the Census Profile has nothing on unpaid care, cars or the internet, or on change by age since 2016.
- 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 Quebec’s towns and Canada’s towns. Two medians frame each figure: one for Quebec’s towns and neighbourhoods of 2,500 or more, one for all Canadian towns of that size, with whole cities and First Nations reserves left out. Percentiles rank the town within Canada.
Questions about Mercier’s residents
What is the median income in Mercier?
Half of Mercier’s households had more than $100,000 in 2020, before tax; across Canada’s towns the median was $86,000.
What is the population of Mercier?
About 16,036, by Statistics Canada’s estimate for July 2025. The 2021 Census found 14,626 people in Mercier, 12% more than 2016.
What is the average age in Mercier?
The median age is 39.2, younger than 69% of Canadian towns. 22% are under 15 and 14% 65 or older.
Is Mercier bilingual?
Both official languages are spoken by 54% of residents, against a typical 7.5% across Canada’s towns. 2.9% speak only English and 43% only French; 82% grew up with French.
How diverse is Mercier?
Immigrants: 12% (Canada’s towns: 17%). Visible minority: 13%. Indigenous identity: 2.5%.
What religion are people in Mercier?
26% said they have no religion and 70% that they are Christian; 4% named another faith.
Is Mercier good for families?
22% of residents are under 15 (Canada’s towns: 16%); couple families are 62% of households and one-parent families 9.8%. Schools near Mercier 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).