A smaller share of flats than 99% of compared French towns: 2.8%
With households without a car at 4.2%, Mont-Saint-Sulpice is behind 93% of compared French towns on that count. The town counted 781 residents and 360 households at the 2023 Census. About one in 11: that is how common second homes are in Mont-Saint-Sulpice (8.9%). Compared with other places, households headed by a manual worker are common here: 18%, more than in just over three quarters of compared French towns.
Throughout this page, the Yonne median and the France median are the median of compared communes (those with an overall grade), each figure its own median. Source: INSEE, census 2023.
What stands out about the people of Mont-Saint-Sulpice
Fewer residents than in 2012
Mont-Saint-Sulpice had 816 residents at the 2012 census and 781 in 2023, down 4%: slower growth than in 86% of compared French towns. Population ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
From 2012 to 2023, 86% of compared French towns grew faster than Mont-Saint-Sulpice: −4%
Residents at INSEE’s last three censuses, each recast in the 2026 commune boundaries. France has no yearly estimate by commune between censuses.
2012 to 2023
2017 to 2023
In two steps, −3% to 2017 and −2% after, the town’s change compares with +5% for the median compared French town and −4% in Yonne.
9.6% of residents are 15 to 24, below 71% of compared French towns
Shares of residents by age at the 2023 census.
Age groups · share of residents
Median age of the 3,798 compared French towns
■ Mont-Saint-Sulpice 44.2. The median compared French town: 44.
The census found that just over a fifth of residents are 65 or over in Mont-Saint-Sulpice. With a median age of 44.2, Mont-Saint-Sulpice is older than just over half of compared French towns.
Women and men · all residents
50% women, 50% men
About an even split. Median share of women: Yonne 52.2%, France 51.8%.
Mont-Saint-Sulpice ranks below 99% of compared French towns on single-parent households: 2.8%
A household is everyone who shares a main home (résidence principale). Household types come from INSEE’s fuller sample of a quarter of census forms.
Against the Yonne median and the France median
Living alone · share
The share of one-person households is 31%, against 35% in the typical compared French town. Compared with other places, couples with children are common here: 28%, more than in nearly two thirds of compared French towns. For comparison, 10% of households are single parents in the typical compared French town. Households average 2.2 people.
Mont-Saint-Sulpice ranks above 63% of compared French towns on empty homes: 8%
Every home the census counted: main residences, second homes and occasional dwellings (INSEE counts them together), and empty homes. Owning and renting are on Cost of living.
All homes · share of homes
Type of home
Cars per household · share of households
Turnover: 6.5% of households moved in less than two years ago, and 26% have lived in their home 30 years or more. Households in social housing are rarer here than in 99% of compared French towns. Elsewhere, 6.7% of homes stand empty in the typical compared French town.
Standard of living at the median: €26,670 a year
The standard of living (niveau de vie) is a household’s disposable income after taxes and benefits, divided by its consumption units (UC) to allow for its size and make-up: 1 for the first adult, 0.5 for each other person 14 or older, 0.3 for each child under 14.
Medians of compared communes. Source: INSEE, Filosofi 2023.
Half of Mont-Saint-Sulpice’s residents live in households with a standard of living below €26,670 a year per consumption unit, and half above: higher than in 58% of compared French towns.
Households headed by a manager or professional make up 7% in Mont-Saint-Sulpice, less than in 68% of compared French towns
Households by the socio-professional group (PCS) of their reference person, INSEE’s own categories. Jobs and commuting are on the Work & commute page.
Households by reference person’s group · share of households
34% of households are headed by a retired person, against 32% in the typical compared French town. On average, 9.4% of households are headed by a manager or professional in the typical compared French town.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
Below 80% of compared French towns: 3.2% of residents are immigrants
INSEE publishes two measures, which overlap but aren’t the same. Neither is the UK’s “born abroad”.
Share of residents · census 2023
Immigrant (immigré)
Born abroad, not French at birth. Someone stays an immigrant after becoming French. A French citizen born abroad (for example in Algeria before 1962) is not one.
Foreign national (étranger)
Not a French citizen today, wherever born. A child born in France to foreign parents can be a foreign national without being an immigrant.
Foreign nationals make up 2.2%, against 4.3% in the typical compared French town. The comparison figure for immigrants is 6.5% in the typical compared French town. The median compared commune in Yonne has 9.2%; immigrants here make up a share lower than in 80% of compared French towns.
INSEE publishes no country of birth or ethnicity by commune in these tables, and the census doesn’t ask about religion.
A lower share of single residents than 88% of compared French towns, at 21%
Residents 15 and over by how they live: the census asks both the legal status and whether people live as a couple.
Residents 15 and over · share
Married people make up 48% and PACS partners 5.4%, against 43% and 6.1% in the median compared French town; 6.3% are widowed. Typically, a quarter of residents 15 and over are single in the typical compared French town.
A lower share of adults with no qualification than 79% of compared French towns, at 14%
Highest diploma of residents 15 and over who have left education, in French terms: the levels don’t map one-to-one to UK or U.S. ones.
Highest diploma · 15 and over, out of education
The share of graduates of higher education is 26%, against 30% in the typical compared French town. On average, 19% of adults out of school have no qualification in the typical compared French town.
16th lowest median age among 41 French towns of 781 to 2,582
The 40 compared French towns nearest in population, by median age. Hover for each one’s second homes and immigrants; click for its page.
At the ends of the range sit Villejust (37.2), the youngest, and Prayssac (62.3), the oldest.
A younger town than 5 of the 6 around it: Mont-Saint-Sulpice
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Mont-Saint-Sulpice | 44.2 | 21% | 8.9% | 3.2% |
| Brienon-sur-Armançon 3,032 · 2.9 mi | 47 | 25% | 7.3% | 6.1% |
| Migennes 6,688 · 5.3 mi | 45.1 | 25% | 1.8% | 17% |
| Saint-Florentin 4,164 · 5.6 mi | 47.7 | 28% | 3.5% | 18% |
| Appoigny 3,114 · 7.4 mi | 50.2 | 28% | 2.7% | 6.2% |
| Monéteau 4,114 · 7.6 mi | 52.1 | 32% | 2% | 6.2% |
| Joigny 9,016 · 10.5 mi | 43.4 | 25% | 4.8% | 21% |
Health, work, housing and schools
What this data can and can’t tell you
- Census 2023. INSEE’s census is a rolling survey: a fifth of small communes each year, 8% of homes in large ones each year. “2023” pools the surveys of 2021 to 2025, so the figures describe the town around 2023, not on one day.
- Medians of compared communes. The comparisons are the median of the département’s compared communes and of France’s (those with an overall grade), each figure its own median: not the total for the département or for France, which large cities pull towards their own figures.
- Immigrants and foreign nationals. INSEE’s two measures: an immigrant was born abroad without French nationality; a foreign national isn’t French today. Neither is a count of people born abroad, which INSEE doesn’t publish by commune.
- Second homes. Homes used for holidays or weekends, with occasional dwellings (kept for work, for example), which INSEE counts together. Their owners are counted where they live, not here.
- Standard of living. INSEE’s Filosofi: disposable income per consumption unit, from tax and benefit files, 2023. The poverty rate is the share of residents below 60% of France’s median. Not published for the smallest communes.
- What France doesn’t ask. The French census asks nothing about ethnicity, religion, language or health, so this page has no such section.
Questions about who lives in Mont-Saint-Sulpice
What is the population of Mont-Saint-Sulpice?
781 at INSEE’s 2023 census, 4% fewer than in 2012 (816).
How old are Mont-Saint-Sulpice’s residents?
The median age is 44.2, older than 51% of compared French towns. 21% are under 18 and 21% 65 or older.
How many second homes are there in Mont-Saint-Sulpice?
38, with occasional dwellings: 8.9% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Mont-Saint-Sulpice?
INSEE counts 25 immigrants (born abroad, not French at birth), 3.2% of residents, and 17 foreign nationals (2.2%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Mont-Saint-Sulpice?
€26,670 a year per consumption unit in 2023 (median of compared French towns €25,970). Source: INSEE, Filosofi.
Sources: INSEE, census 2023 (population, ages, households, homes, marital status, diplomas, immigrants, foreign nationals, employment), 2026 geography · INSEE, Filosofi 2023 (standard of living, poverty) · IGN Admin Express (boundaries) · Medians and percentiles: TownRatings, over compared French towns, updated November 9, 2026. Under the Licence Ouverte / Open Licence 2.0 (Etalab).
Contains public sector information under the Licence Ouverte / Open Licence 2.0 (Etalab): INSEE, DGFiP, the Interior Ministry’s statistics service (SSMSI), the Ministry of Education (DEPP), the Health Ministry’s statistics service (DREES) and the Housing Ministry (Carte des loyers). Commune boundaries: IGN Admin Express.