At under 1,000 residents, Gaillon-sur-Montcient is too small for the grades other French towns get. It skews young: only 14% of residents are 65 or over.
What makes Gaillon-sur-Montcient stand out
The one thing Gaillon-sur-Montcient does most differently from other towns.
Data highlights are ordered by what stands out in Gaillon-sur-Montcient.
Who lives here
A young town: 13% of people in Gaillon-sur-Montcient are 15 to 24, more than in Yvelines’ towns or compared French towns
Degrees are held by 44% of adults, lower than Yvelines’ towns (49%) yet higher than compared French towns (30%). Under 15: 19% of residents. The age that splits Gaillon-sur-Montcient in two is 40.5.
40.5median age
Gaillon-sur-MontcientYvelines medianFrance median
Ages · share of residents
13%
Under 1515–2425–4445–6465+
Highest diploma · residents 15 and older who have left education
No diploma11%
CAP or BEP22%
Baccalauréat20%
Higher education44%
Women and men · all residents
50% women, 50% men
WomenFrance medianMen
About an even split. Median share of women: Yvelines 51.6%, France 51.8%.
Ministère de la Culture, Mérimée (Licence Ouverte 2.0) · INSEE, census 2023, homes by build period
Work & commute
Gaillon-sur-Montcient is better off than Yvelines’ towns or compared French towns: the median disposable income is €33,840 a year per consumption unit
Of those in the labour force, 6.2% are unemployed. 16.3% of commuters walked, cycled or took the bus or train at the census, between Yvelines’ towns (35.4%) and compared French towns (13.4%). Jobs based in Gaillon-sur-Montcient number 100, against 350 residents in work (0.3 per worker).
16%walk, cycle or take transit
How working residents got to work · census 2023
Driving77%
Public transport13%
On foot1%
Bicycle1%
Motorbike or scooter1%
100
jobs based in Gaillon-sur-Montcient, 0.3 per working resident
6.2%
unemployment rate, ages 15 to 64 in the labor force · median of compared French towns 10.1%
€33,840
median annual income per consumption unit, 2023 · median of compared French towns €25,970
Ministry of Education (DEPP) · brevet and bac 2025, value added (IVAC, IVAL) · Licence Ouverte
Housing
The estimated advertised rent in Gaillon-sur-Montcient is €16.20/m² a month, against €18.40/m² in Yvelines’ towns and €12.41/m² in compared French towns
Rents are the ministry’s estimates of advertised rents, not rents actually paid.
Houses were 90% of what sold. Between July 2023 and June 2026, buyers took 20 homes in Gaillon-sur-Montcient.
€16.20/m²estimated apartment rent a month
Estimated advertised apartment rent per m² a month
Gaillon-sur-Montcient€16.20/m²
Median of towns€12.41/m²
Yvelines median€18.40/m²
€16.20/m²
estimated advertised apartment rent a month, charges included (€13.60 to €19.29/m² a month)
€15.31/m²
estimated advertised house rent a month, charges included
People: INSEE, census 2023. Miles: center to center.
About Gaillon-sur-Montcient
Commune in Yvelines, Île-de-France
Gaillon-sur-Montcient is a commune of 689 people in the Communauté urbaine Grand Paris Seine et Oise. TownRatings compares communes, France’s local unit: each has its own mayor and its own statistics. Its area takes in the town and the countryside around it.
Built from INSEE’s 2026 official geography (COG) and IGN Admin Express boundaries
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.
