2.6% of households have no car, fewer than in 99% of compared French towns
The figure for households headed by a retired person is 20% in Cize and 32% in the typical compared French town. Census day 2023: 168 residents and 85 households here. Across Cize, 3.4% of homes stand empty. Single-parent households are rarer here than in 92% of compared French towns.
Throughout this page, the Ain 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 Cize
One home in seven is a second home
The census counted 15 second homes and occasional dwellings in Cize, 14% of its 100 homes: higher than in 91% of compared French towns. 100% of them are houses. Their owners live elsewhere, so they aren’t in the population figures on this page. Homes & cars ↓
Written from INSEE’s census 2023 on this page, against compared French towns.
2.1% of homes are flats, fewer than in 99% of compared French towns
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
14% of homes are second homes (typical compared French town: 2.1%). In the typical compared French town, flats come to 30%.
−3% since 2012: slower than 81% 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
From 2012 to 2017 the change was ±0%; from 2017 to 2023, −3%. Over the same years the median compared French town changed +5%, the median Ain town +13%.
Older than 71% of compared French towns: half of Cize is over 47.3
Shares of residents by age at the 2023 census.
Age groups · share of residents
Median age of the 3,798 compared French towns
■ Cize 47.3. The median compared French town: 44.
Set against 22% in the typical compared French town, 20% of residents are 65 or over in Cize. 10% of residents are 15 to 24.
Women and men · all residents
46% women, 54% men
About 115 men for every 100 women. Median share of women: Ain 51.0%, France 51.8%.
Cize ranks below 74% of compared French towns on couples with children: 20%
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 Ain median and the France median
Living alone · share
One-person households make up 40%, against 35% in the typical compared French town. In the typical compared French town, the share of couples with children is 25%. On average, 2 people share a household.
Median living standard: €27,090 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 Cize’s residents live in households with a standard of living below €27,090 a year per consumption unit, and half above: higher than in 62% of compared French towns.
20% of households are headed by a manual worker, a share 83% of compared French towns don’t reach
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
Households headed by a manager or professional are rarer here than in 99% of compared French towns. Against that, 14% of households are headed by a manual worker in the typical compared French town.
Each household is counted once, by the occupation of its reference person (usually the oldest working adult).
Below 92% of compared French towns: 1.9% 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.
In the typical compared French town, 4.3% of residents are foreign nationals; in Cize, 1.9%. Set beside 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.
Only 42% of residents 15 and over are married in Cize
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
Census figures put single residents at 26% in Cize. In the median compared French town 43% are married and 6.1% in a PACS; here it is 42% and 5.8%, and 9.5% are widowed.
Cize ranks below 72% of compared French towns on adults with no qualification: 15%
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 trails 59% of compared French towns: 27%. In the typical compared French town, adults with no qualification come to 19%.
Among 41 French towns of 168 to 2,582 people, the 15th oldest
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.
Every neighbor is younger than Cize
The nearest towns of 2,500 or more, colored by median age. Source: INSEE, census 2023.
| Town | Median age | 65+ | Second homes | Immigrants |
|---|---|---|---|---|
| Cize | 47.3 | 20% | 14% | 1.9% |
| Ceyzériat 3,328 · 6.2 mi | 45.1 | 23% | 2.7% | 4.2% |
| Montréal-la-Cluse 3,568 · 6.4 mi | 42.5 | 19% | 2.2% | 23% |
| Nantua 3,416 · 8.5 mi | 42.3 | 23% | 3.6% | 27% |
| Saint-Étienne-du-Bois 2,584 · 9.2 mi | 45.6 | 24% | 1.7% | 4.5% |
| Bellignat 3,525 · 9.4 mi | 40.8 | 21% | 1.7% | 26% |
| Oyonnax 22,480 · 10.3 mi | 41.1 | 19% | 2.1% | 33% |
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 Cize
What is the population of Cize?
168 at INSEE’s 2023 census, 3% fewer than in 2012 (173).
How old are Cize’s residents?
The median age is 47.3, older than 71% of compared French towns. 14% are under 18 and 20% 65 or older.
How many second homes are there in Cize?
15, with occasional dwellings: 14% of all homes, against 2.1% for the median compared French town.
How many immigrants live in Cize?
INSEE counts 3 immigrants (born abroad, not French at birth), 1.9% of residents, and 3 foreign nationals (1.9%). The medians of compared French towns are 6.5% and 4.3%.
What is the median income in Cize?
€27,090 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 October 30, 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.