In Seine-Maritime · INSEE, populations légales
Rouen is the most densely populated city in Seine-Maritime, at 5,502 inhab./km², ahead of Le Petit-Quevilly (5,112 inhab./km²) and Sotteville-lès-Rouen (3,904 inhab./km²). At the other end, Étretat is the least densely populated city, at 267 inhab./km².
| Rank | City | Density | Population |
|---|---|---|---|
| 1 | Rouen | 5,502 inhab./km² | 117,662 |
| 2 | Le Petit-Quevilly | 5,112 inhab./km² | 22,208 |
| 3 | Sotteville-lès-Rouen | 3,904 inhab./km² | 29,003 |
| 4 | Déville-lès-Rouen | 3,416 inhab./km² | 10,802 |
| 5 | Le Havre | 3,140 inhab./km² | 166,687 |
| 6 | Caudebec-lès-Elbeuf | 2,866 inhab./km² | 10,476 |
| 7 | Maromme | 2,655 inhab./km² | 10,957 |
| 8 | Mont-Saint-Aignan | 2,541 inhab./km² | 20,165 |
| 9 | Dieppe | 2,411 inhab./km² | 28,496 |
| 10 | Le Grand-Quevilly | 2,349 inhab./km² | 25,789 |
| 11 | Bois-Guillaume | 1,641 inhab./km² | 14,539 |
| 12 | Saint-Étienne-du-Rouvray | 1,615 inhab./km² | 29,518 |
| 13 | Yvetot | 1,530 inhab./km² | 11,438 |
| 14 | Fécamp | 1,152 inhab./km² | 17,313 |
| 15 | Elbeuf | 949 inhab./km² | 15,474 |
| 16 | Barentin | 945 inhab./km² | 12,022 |
| 17 | Bolbec | 943 inhab./km² | 11,590 |
| 18 | Canteleu | 818 inhab./km² | 14,402 |
| 19 | Montivilliers | 814 inhab./km² | 15,478 |
| 20 | Oissel-sur-Seine | 556 inhab./km² | 12,317 |
| 21 | Port-Jérôme-sur-Seine | 348 inhab./km² | 10,617 |
| 22 | Étretat | 267 inhab./km² | 1,102 |
The same ranking for the whole of France : The densest cities in France · The least densely populated cities in France
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.