Largest city in Île-de-France: the 2026 ranking
The largest cities in Île-de-France and its 8 departments compared by population, area and density, based on the official INSEE population figures in force in 2026.
The largest city in Île-de-France is Paris, with 2,119,412 inhabitants, ranked 1st in France by population, ahead of Saint-Denis (149,936) and Boulogne-Billancourt (120,206).
Île-de-France has 1,266 communes and 12,571,781 inhabitants over 12,012 km², or 18.1% of the French population, with a density of 1,047 inhabitants per km² (national average: 110). Its most populous department is Paris (2,119,412 inhabitants), and its least populous is Val-d'Oise (1,290,942).
Departments of Île-de-France
| Department | Towns | Population | km² | per km² | Largest city |
|---|---|---|---|---|---|
| Paris (75) | 1 | 2,119,412 | 105 | 20,108 | Paris (2,119,412) |
| Seine-Saint-Denis (93) | 39 | 1,710,659 | 236 | 7,242 | Saint-Denis (149,936) |
| Hauts-de-Seine (92) | 36 | 1,670,575 | 176 | 9,513 | Boulogne-Billancourt (120,206) |
| Yvelines (78) | 259 | 1,508,510 | 2,284 | 660 | Versailles (85,750) |
| Seine-et-Marne (77) | 507 | 1,484,180 | 5,915 | 251 | Meaux (57,360) |
| Val-de-Marne (94) | 47 | 1,435,612 | 245 | 5,859 | Vitry-sur-Seine (94,393) |
| Essonne (91) | 194 | 1,351,891 | 1,804 | 749 | Évry-Courcouronnes (67,272) |
| Val-d'Oise (95) | 183 | 1,290,942 | 1,246 | 1,036 | Argenteuil (106,546) |
The 20 largest cities in Île-de-France by population
Largest towns by area in Île-de-France
| # | Town | Department | Population | km² | per km² | France rank |
|---|---|---|---|---|---|---|
| 1 | Fontainebleau | Seine-et-Marne (77) | 16,021 | 172 | 93 | 63rd |
| 2 | Paris | Paris (75) | 2,119,412 | 105 | 20,108 | 209th |
| 3 | Saint-Germain-en-Laye | Yvelines (78) | 47,628 | 52 | 917 | 1,071st |
| 4 | Chenoise-Cucharmoy | Seine-et-Marne (77) | 1,619 | 49 | 33 | 1,257th |
| 5 | Sonchamp | Yvelines (78) | 1,738 | 46 | 37 | 1,433rd |
| 6 | Jouarre | Seine-et-Marne (77) | 4,265 | 42 | 101 | 1,810th |
| 7 | Étampes | Essonne (91) | 27,034 | 41 | 661 | 1,964th |
| 8 | Beautheil-Saints | Seine-et-Marne (77) | 2,124 | 38 | 55 | 2,286th |
| 9 | Louan-Villegruis-Fontaine | Seine-et-Marne (77) | 509 | 38 | 13 | 2,332nd |
| 10 | Jouy-le-Châtel | Seine-et-Marne (77) | 1,648 | 38 | 44 | 2,380th |
Most densely populated towns in Île-de-France
| # | Town | Department | Population | km² | per km² | France rank |
|---|---|---|---|---|---|---|
| 1 | Levallois-Perret | Hauts-de-Seine (92) | 68,620 | 2.4 | 28,473 | 1st |
| 2 | Vincennes | Val-de-Marne (94) | 48,644 | 1.9 | 25,468 | 2nd |
| 3 | Le Pré-Saint-Gervais | Seine-Saint-Denis (93) | 17,049 | 0.7 | 24,356 | 3rd |
| 4 | Saint-Mandé | Val-de-Marne (94) | 21,228 | 0.9 | 23,074 | 4th |
| 5 | Montrouge | Hauts-de-Seine (92) | 46,579 | 2.1 | 22,502 | 5th |
| 6 | Clichy | Hauts-de-Seine (92) | 64,658 | 3.1 | 20,993 | 6th |
| 7 | Paris | Paris (75) | 2,119,412 | 105 | 20,108 | 7th |
| 8 | Courbevoie | Hauts-de-Seine (92) | 83,480 | 4.2 | 20,019 | 8th |
| 9 | Asnières-sur-Seine | Hauts-de-Seine (92) | 94,562 | 4.8 | 19,619 | 9th |
| 10 | Boulogne-Billancourt | Hauts-de-Seine (92) | 120,206 | 6.2 | 19,482 | 10th |
Other regions of France
Auvergne-Rhône-Alpes Bourgogne-Franche-Comté Brittany Centre-Val de Loire Corsica Grand Est Guadeloupe French Guiana Hauts-de-France Réunion Martinique Normandy Nouvelle-Aquitaine Occitanie Pays de la Loire Provence-Alpes-Côte d'Azur
Sources: INSEE, official population figures in force on January 1, 2026 (total population); land area: IGN / Observatoire des territoires. Rankings computed across the 34,858 communes in the database.