Dieppe sits below 95% of compared French towns for couples with children (13%)
In the typical compared French town, the share of households without a car is 11%; Dieppe has 33%. Census day 2023: 28,496 residents and 15,170 households in the town. 30% of residents are 65 or over, or about one in three. Empty homes are more common here than in 86% of compared French towns.
Throughout this page, the Seine-Maritime 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 Dieppe
One home in eight is a second home
The census counted 2,380 second homes and occasional dwellings in Dieppe, 12% of its 19,810 homes: higher than in 89% of compared French towns. 23% of them are houses. Their owners live elsewhere, so they aren’t in the population figures on this page. Homes & cars ↓
Many people living alone
51% of Dieppe’s households are one person: higher than in 95% of compared French towns; 44% of residents 65 and over live alone. Households ↓
Social housing
38% of households rent from a social landlord (HLM), 25% rent privately and 36% own their home. Homes & cars ↓
Fewer residents than in 2012
Dieppe had 30,632 residents at the 2012 census and 28,496 in 2023, down 7%: slower growth than in 93% of compared French towns. Population ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
38% of households rent social housing (HLM), a share 97% of compared French towns don’t reach
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
Where 30% of homes are flats in the typical compared French town, Dieppe has 69%. Against that, 12% of households rent social housing (HLM) in the typical compared French town. Second homes are more common here than in 89% of compared French towns.
From 2012 to 2023, 93% of compared French towns grew faster than Dieppe: −7%
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
The median Seine-Maritime town changed ±0% and the median compared French town +5%; here the first five years brought −5% and the next six −2%.
A median age of 50.5: Dieppe is older than 85% 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
■ Dieppe 50.5. The median compared French town: 44.
About one in nine: that is how common residents aged 15 to 24 are in Dieppe (11%).
Women and men · all residents
55% women, 45% men
About 83 men for every 100 women. Median share of women: Seine-Maritime 52.8%, France 51.8%. Women live longer than men, so towns with many older residents have more women.
Dieppe sits above 95% of compared French towns for one-person households (51%)
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 Seine-Maritime median and the France median
Living alone · share
Just over one in ten households are single parents, against 10% in the typical compared French town. Across the comparison, just over a third of households are one person living alone in the typical compared French town. On average, 1.8 people share a household.
The median resident lives on €21,140 a year per consumption unit
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.
Living standards centre on €21,140 a year per consumption unit: lower than in 93% of compared French towns. As for poverty, 27.4% of residents are below the line.
A higher share of households headed by a retired person than 87% of compared French towns, at 42%
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
In the typical compared French town, 9.4% of households are headed by a manager or professional; in Dieppe, 5.8%. For comparison, 32% of households are headed by a retired person in the typical compared French town. The share of households headed by a manual worker stands at 15%.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
Dieppe sits below 69% of compared French towns for immigrants (4.4%)
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 about one in 26 here (3.9%). The comparison figure for immigrants is 6.5% 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.
33% of residents 15 and over are married, fewer than in 95% of compared French towns
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
Single residents make up 30%, against 25% in the typical compared French town. In the typical compared French town, married residents come to 43%.
Dieppe: 29% of adults out of school have no qualification, above 88% of compared French towns
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 21%, against 30% in the typical compared French town. Adults with no qualification: 19% in the typical compared French town, for comparison.
Ranked by age, 4th 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.
The youngest is Clichy-sous-Bois (30.5), the oldest Agde (56.2).
Older than Dieppe: 2 of the 6 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 |
|---|---|---|---|---|
| Dieppe | 50.5 | 30% | 12% | 4.4% |
| Offranville 3,242 · 3.9 mi | 50.1 | 28% | 3.9% | 1.5% |
| Petit-Caux 9,513 · 6.7 mi | 43.8 | 20% | 10% | 1.2% |
| Saint-Nicolas-d'Aliermont 3,665 · 6.8 mi | 49.2 | 29% | 1.1% | 1.2% |
| Criel-sur-Mer 2,527 · 12.8 mi | 54.9 | 33% | 44% | 2.6% |
| Val-de-Scie 2,530 · 14.4 mi | 42.1 | 22% | 3.6% | 1.3% |
| Le Tréport 4,378 · 16 mi | 53.2 | 32% | 37% | 1.8% |
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 Dieppe
What is the population of Dieppe?
28,496 at INSEE’s 2023 census, 7% fewer than in 2012 (30,632).
How old are Dieppe’s residents?
The median age is 50.5, older than 85% of compared French towns. 18% are under 18 and 30% 65 or older.
How many second homes are there in Dieppe?
2,380, with occasional dwellings: 12% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Dieppe?
INSEE counts 1,250 immigrants (born abroad, not French at birth), 4.4% of residents, and 1,110 foreign nationals (3.9%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Dieppe?
€21,140 a year per consumption unit in 2023 (median of compared French towns €25,970); 27.4% 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.