4.2% of households are headed by a manager or professional, below 92% of compared French towns
Just over a fifth of households have no car; in the typical compared French town the figure is 11%. The 2023 Census counted 14,959 residents in 6,840 households. Here, 27% of households rent social housing (HLM). At 20%, the share of couples with children is lower than in 73% of compared French towns.
Throughout this page, the Aube 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 Romilly-sur-Seine
Immigrants
INSEE counts 2,600 immigrants in Romilly-sur-Seine (people born abroad who weren’t French at birth, whatever their nationality now): 17% of residents, against 9.2% for the median compared commune in Aube. 13% are foreign nationals. Immigrants and foreign nationals ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
Romilly-sur-Seine grew +7% from 2012 to 2023, faster than 60% of compared French towns
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
For comparison, the median compared French town changed +5% and the median Aube town +2%. The first five years brought +3%; the six to 2023, +4%.
Younger than 60% of compared French towns: half of Romilly-sur-Seine is under 42.8
Shares of residents by age at the 2023 census.
Age groups · share of residents
Median age of the 3,798 compared French towns
■ Romilly-sur-Seine 42.8. The median compared French town: 44.
Across Romilly-sur-Seine, nearly a quarter of residents are 65 or over. Residents aged 15 to 24 are about as common here as in the typical compared French town, at 11%.
Women and men · all residents
52% women, 48% men
About 92 men for every 100 women. Median share of women: Aube 52.1%, France 51.8%.
Romilly-sur-Seine ranks above 92% of compared French towns on single-parent households: 14%
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 Aube median and the France median
Living alone · share
Compared with 35% in the typical compared French town, just over two in five households are one person living alone here. The usual figure: one in ten households are single parents in the typical compared French town. Average household size: 2.1 people.
A larger share of empty homes than 84% of compared French towns: 11%
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
12% of households arrived within the last two years, while 19% have stayed 30 years or more. To put it in context, 6.7% of homes stand empty in the typical compared French town. At 2.7%, the share of second homes is in line with the figure in the typical compared French town.
A typical living standard of €19,520 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.
At €19,520 a year per consumption unit, the median standard of living here is lower than in 97% of compared French towns. Below the poverty line: 32.0% of residents.
In Romilly-sur-Seine, 20% of households are headed by a manual worker, more than in 84% 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
Set against 32% in the typical compared French town, 34% of households are headed by a retired person in Romilly-sur-Seine. Households headed by a manual worker: 14% in the typical compared French town, for comparison.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
Immigrants: 17%, a higher share than 89% of compared French towns
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.
With foreign nationals at 13%, Romilly-sur-Seine is ahead of 89% of compared French towns on that count. Against that, 6.5% of residents are immigrants in the typical compared French town.
INSEE publishes no country of birth or ethnicity by commune in these tables, and the census doesn’t ask about religion.
A larger share of single residents than 78% of compared French towns: 30%
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
The share of married residents is 39%, against 43% in the typical compared French town. As a yardstick, a quarter of residents 15 and over are single in the typical compared French town.
Romilly-sur-Seine ranks below 96% of compared French towns on graduates of higher education: 16%
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
With adults with no qualification at 33%, Romilly-sur-Seine is ahead of 96% of compared French towns on that count. The benchmark for graduates of higher education in the typical compared French town: 30%.
Ranked by age, 21st oldest of 41 French towns this size
The 40 compared French towns nearest in population, by median age. Hover for each one’s second homes and immigrants; click for its page.
Ages run from 34.9 in Lognes to 54.3 in Saint-Jean-de-Luz.
Older than Romilly-sur-Seine: 2 of the 4 towns nearby
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Romilly-sur-Seine | 42.8 | 23% | 2.7% | 17% |
| Villenauxe-la-Grande 2,605 · 9.5 mi | 41.3 | 22% | 3.5% | 9.4% |
| Nogent-sur-Seine 5,537 · 10.2 mi | 42.5 | 22% | 6.5% | 13% |
| Sézanne 4,576 · 14.3 mi | 50.7 | 30% | 3% | 8.3% |
| Saint-Lyé 2,956 · 16.6 mi | 47.7 | 25% | 1.1% | 5% |
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 Romilly-sur-Seine
What is the population of Romilly-sur-Seine?
14,959 at INSEE’s 2023 census, 7% more than in 2012 (13,968).
How old are Romilly-sur-Seine’s residents?
The median age is 42.8, younger than 60% of compared French towns. 25% are under 18 and 23% 65 or older.
How many second homes are there in Romilly-sur-Seine?
210, with occasional dwellings: 2.7% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Romilly-sur-Seine?
INSEE counts 2,560 immigrants (born abroad, not French at birth), 17% of residents, and 1,920 foreign nationals (13%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Romilly-sur-Seine?
€19,520 a year per consumption unit in 2023 (median of compared French towns €25,970); 32.0% of residents live below the poverty line. 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.