What is the youngest city in Île-de-France?

Fleury-Mérogis, at 31.4 years, ahead of Montévrain (32.8 years).

What is the oldest city in Île-de-France?

L'Isle-Adam, at 45.6 years. 266 cities of Île-de-France are measured here.

Where does Fleury-Mérogis stand in France?

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

Which cities lead in Île-de-France?

Fleury-Mérogis (31.4 years), Montévrain (32.8 years), Lieusaint (32.8 years), Cergy (33.1 years), Clichy-sous-Bois (33.4 years). The whole table is on this page.

Le Bon Rang

In Île-de-France · INSEE, recensement de la population

The youngest cities in Île-de-France

Fleury-Mérogis is the youngest city in Île-de-France, at 31.4 years, ahead of Montévrain (32.8 years) and Lieusaint (32.8 years). At the other end, L'Isle-Adam is the oldest city, at 45.6 years.

Could you put Aubervilliers, Aulnay-sous-Bois and Cergy in this ranking's order? Le Bon Rang is that game, every day. Play today's game

The top 100 of the 266 cities of Île-de-France on mean age
Rank	City	Mean age	Population
1	91 Fleury-Mérogis	31.4 years	13,721
2	77 Montévrain	32.8 years	15,687
3	77 Lieusaint	32.8 years	14,017
4	95 Cergy	33.1 years	70,906
5	93 Clichy-sous-Bois	33.4 years	29,354
6	91 Grigny	33.4 years	26,842
7	78 Carrières-sous-Poissy	33.7 years	20,825
8	93 Dugny	33.7 years	11,700
9	95 Villiers-le-Bel	33.9 years	30,053
10	93 Stains	34.2 years	41,388
11	95 Persan	34.3 years	14,359
12	78 Trappes	34.4 years	34,689
13	93 Villepinte	34.6 years	41,470
14	77 Moissy-Cramayel	34.6 years	18,511
15	91 Corbeil-Essonnes	34.7 years	54,471
16	77 Melun	34.8 years	45,995
17	77 Savigny-le-Temple	34.9 years	31,148
18	78 Chanteloup-les-Vignes	35.0 years	10,861
19	93 La Courneuve	35.1 years	47,167
20	95 Garges-lès-Gonesse	35.1 years	41,791
21	94 Villeneuve-Saint-Georges	35.1 years	36,221
22	93 Villetaneuse	35.1 years	12,530
23	91 Saint-Pierre-du-Perray	35.1 years	11,993
24	77 Dammartin-en-Goële	35.2 years	11,907
25	77 Serris	35.2 years	10,326
26	93 Saint-Denis (93)	35.4 years	149,077
27	93 Le Blanc-Mesnil	35.4 years	62,376
28	94 Valenton	35.5 years	14,406
29	91 Évry-Courcouronnes	35.6 years	66,919
30	93 Bobigny	35.6 years	56,927
31	77 Bussy-Saint-Georges	35.6 years	27,498
32	91 Épinay-sous-Sénart	35.6 years	11,611
33	91 Saint-Germain-lès-Arpajon	35.7 years	11,623
34	95 Sarcelles	35.9 years	59,173
35	78 Les Mureaux	35.9 years	34,632
36	78 Guyancourt	35.9 years	29,778
37	77 Champs-sur-Marne	35.9 years	27,451
38	94 Limeil-Brévannes	35.9 years	27,406
39	95 Jouy-le-Moutier	35.9 years	17,854
40	93 Sevran	36.0 years	52,535
41	91 Ris-Orangis	36.0 years	31,189
42	93 Les Pavillons-sous-Bois	36.0 years	25,804
43	95 Montigny-lès-Cormeilles	36.0 years	22,457
44	91 Juvisy-sur-Orge	36.0 years	19,292
45	93 Aubervilliers	36.1 years	88,365
46	93 Neuilly-sur-Marne	36.1 years	39,800
47	93 Romainville	36.1 years	37,152
48	95 Bezons	36.1 years	36,434
49	95 Goussainville	36.1 years	31,301
50	78 Saint-Cyr-l'École	36.1 years	21,268
51	93 Épinay-sur-Seine	36.3 years	52,833
52	77 Villeparisis	36.3 years	26,946
53	94 Orly	36.3 years	24,658
54	78 Limay	36.3 years	17,885
55	77 Lognes	36.3 years	15,074
56	95 Pierrelaye	36.3 years	10,130
57	93 Noisy-le-Sec	36.4 years	45,510
58	95 Pontoise	36.4 years	31,970
59	95 Saint-Ouen-l'Aumône	36.4 years	25,578
60	95 Louvres	36.4 years	12,560
61	92 Gennevilliers	36.5 years	50,979
62	92 Asnières-sur-Seine	36.6 years	93,941
63	94 Ivry-sur-Seine	36.6 years	65,064
64	93 Pantin	36.6 years	61,929
65	77 Meaux	36.6 years	56,905
66	93 Saint-Ouen-sur-Seine	36.6 years	53,615
67	93 Bagnolet	36.6 years	43,086
68	91 Vigneux-sur-Seine	36.6 years	31,466
69	94 Fresnes	36.6 years	29,528
70	95 Fosses	36.6 years	10,570
71	95 Gonesse	36.7 years	27,707
72	91 Brétigny-sur-Orge	36.7 years	26,658
73	92 Villeneuve-la-Garenne	36.7 years	26,021
74	78 Mantes-la-Ville	36.7 years	22,332
75	95 Vauréal	36.7 years	16,079
76	93 Aulnay-sous-Bois	36.8 years	87,599
77	95 Montmagny	36.8 years	15,105
78	91 Athis-Mons	36.9 years	36,613
79	93 Montfermeil	36.9 years	28,703
80	77 Montereau-Fault-Yonne	36.9 years	22,279
81	78 Achères	36.9 years	22,241
82	92 Bagneux	37.0 years	44,572
83	91 Les Ulis	37.0 years	25,886
84	93 Rosny-sous-Bois	37.1 years	47,180
85	77 Torcy	37.1 years	22,810
86	92 Nanterre	37.2 years	97,783
87	93 Drancy	37.2 years	72,390
88	77 Mitry-Mory	37.2 years	20,456
89	95 Éragny-sur-Oise	37.2 years	18,436
90	95 Saint-Brice-sous-Forêt	37.2 years	15,063
91	95 Arnouville	37.2 years	15,023
92	92 Colombes	37.3 years	91,053
93	92 Clichy	37.3 years	64,410
94	91 Massy	37.3 years	51,729
95	78 Mantes-la-Jolie	37.3 years	43,526
96	91 Palaiseau	37.3 years	37,471
97	94 Boissy-Saint-Léger	37.3 years	17,325
98	93 Le Bourget	37.3 years	15,925
99	93 Bondy	37.4 years	50,595
100	93 Livry-Gargan	37.4 years	47,228

Every city of Île-de-France →

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 Île-de-France

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 Île-de-France?: Fleury-Mérogis, at 31.4 years, ahead of Montévrain (32.8 years).
What is the oldest city in Île-de-France?: L'Isle-Adam, at 45.6 years. 266 cities of Île-de-France are measured here.
Where does Fleury-Mérogis stand in France?: 6 of the 1,102 French cities measured on mean age. The national ranking is on its own page.
Which cities lead in Île-de-France?: Fleury-Mérogis (31.4 years), Montévrain (32.8 years), Lieusaint (32.8 years), Cergy (33.1 years), Clichy-sous-Bois (33.4 years). The whole table is on this page.