What is the youngest city in Val-d'Oise?

Cergy, at 33.1 years, ahead of Villiers-le-Bel (33.9 years).

What is the oldest city in Val-d'Oise?

L'Isle-Adam, at 45.6 years. 38 cities of Val-d'Oise are measured here.

Where does Cergy stand in France?

11 of the 1,102 French cities measured on mean age. The national ranking is on its own page.

Which cities lead in Val-d'Oise?

Cergy (33.1 years), Villiers-le-Bel (33.9 years), Persan (34.3 years), Garges-lès-Gonesse (35.1 years), Sarcelles (35.9 years). The whole table is on this page.

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In Val-d'Oise · INSEE, recensement de la population

The youngest cities in Val-d'Oise

Cergy is the youngest city in Val-d'Oise, at 33.1 years, ahead of Villiers-le-Bel (33.9 years) and Persan (34.3 years). At the other end, L'Isle-Adam is the oldest city, at 45.6 years.

Could you put Franconville, Garges-lès-Gonesse and Pontoise in this ranking's order? Le Bon Rang is that game, every day. Play today's game

The 38 cities of Val-d'Oise ranked on mean age
Rank	City	Mean age	Population
1	Cergy	33.1 years	70,906
2	Villiers-le-Bel	33.9 years	30,053
3	Persan	34.3 years	14,359
4	Garges-lès-Gonesse	35.1 years	41,791
5	Sarcelles	35.9 years	59,173
6	Jouy-le-Moutier	35.9 years	17,854
7	Montigny-lès-Cormeilles	36.0 years	22,457
8	Bezons	36.1 years	36,434
9	Goussainville	36.1 years	31,301
10	Pierrelaye	36.3 years	10,130
11	Pontoise	36.4 years	31,970
12	Saint-Ouen-l'Aumône	36.4 years	25,578
13	Louvres	36.4 years	12,560
14	Fosses	36.6 years	10,570
15	Gonesse	36.7 years	27,707
16	Vauréal	36.7 years	16,079
17	Montmagny	36.8 years	15,105
18	Éragny-sur-Oise	37.2 years	18,436
19	Saint-Brice-sous-Forêt	37.2 years	15,063
20	Arnouville	37.2 years	15,023
21	Herblay-sur-Seine	37.5 years	31,779
22	Beaumont-sur-Oise	37.5 years	10,232
23	Argenteuil	37.6 years	106,130
24	Franconville	38.2 years	37,754
25	Cormeilles-en-Parisis	38.8 years	27,292
26	Domont	38.8 years	16,065
27	Sannois	38.9 years	26,924
28	Taverny	39.1 years	27,593
29	Ermont	39.2 years	29,489
30	Osny	39.5 years	17,954
31	Eaubonne	39.6 years	26,211
32	Deuil-la-Barre	39.7 years	23,099
33	Saint-Gratien	39.7 years	21,336
34	Soisy-sous-Montmorency	41.0 years	18,008
35	Saint-Leu-la-Forêt	41.2 years	16,138
36	Montmorency	41.4 years	21,763
37	Enghien-les-Bains	42.4 years	11,432
38	L'Isle-Adam	45.6 years	12,493

Every city of Val-d'Oise →

The same ranking for the whole of France : The youngest cities in France · The French cities with the oldest population

The youngest cities in, elsewhere

The other rankings of Val-d'Oise

Scope, method and sources

Scope: France, metropolitan and overseas, Corsica and the DROM included. This dataset holds every commune of 10,000 inhabitants or more, plus smaller communes famous enough to be household names, 1,131 in all. It is not the full list of 35,000 French communes, so a village can sit outside a ranking whose extreme it would otherwise hold.

Method and sources: populations are the INSEE legal populations, boundaries and coordinates come from the IGN commune registry, both served by geo.api.gouv.fr. Density is the population divided by the commune's area; distances are measured as the crow flies from the commune's centre. Data read on August 28, 2026.

4 questions about this ranking

What is the youngest city in Val-d'Oise?: Cergy, at 33.1 years, ahead of Villiers-le-Bel (33.9 years).
What is the oldest city in Val-d'Oise?: L'Isle-Adam, at 45.6 years. 38 cities of Val-d'Oise are measured here.
Where does Cergy stand in France?: 11 of the 1,102 French cities measured on mean age. The national ranking is on its own page.
Which cities lead in Val-d'Oise?: Cergy (33.1 years), Villiers-le-Bel (33.9 years), Persan (34.3 years), Garges-lès-Gonesse (35.1 years), Sarcelles (35.9 years). The whole table is on this page.