In Pas-de-Calais · INSEE, populations légales
Boulogne-sur-Mer is the most densely populated city in Pas-de-Calais, at 5,205 inhab./km², ahead of Arras (3,609 inhab./km²) and Lens (2,826 inhab./km²). At the other end, Le Touquet-Paris-Plage is the least densely populated city, at 276 inhab./km².
| Rank | City | Density | Population |
|---|---|---|---|
| 1 | Boulogne-sur-Mer | 5,205 inhab./km² | 40,539 |
| 2 | Arras | 3,609 inhab./km² | 42,875 |
| 3 | Lens | 2,826 inhab./km² | 32,920 |
| 4 | Béthune | 2,667 inhab./km² | 25,224 |
| 5 | Liévin | 2,341 inhab./km² | 30,063 |
| 6 | Oignies | 1,879 inhab./km² | 10,323 |
| 7 | Outreau | 1,865 inhab./km² | 13,138 |
| 8 | Calais | 1,836 inhab./km² | 67,571 |
| 9 | Auchel | 1,683 inhab./km² | 10,051 |
| 10 | Bully-les-Mines | 1,555 inhab./km² | 12,146 |
| 11 | Méricourt | 1,517 inhab./km² | 11,619 |
| 12 | Avion | 1,340 inhab./km² | 17,435 |
| 13 | Nœux-les-Mines | 1,310 inhab./km² | 11,590 |
| 14 | Bruay-la-Buissière | 1,304 inhab./km² | 21,424 |
| 15 | Longuenesse | 1,251 inhab./km² | 10,548 |
| 16 | Hénin-Beaumont | 1,243 inhab./km² | 25,688 |
| 17 | Courrières | 1,167 inhab./km² | 10,176 |
| 18 | Harnes | 1,133 inhab./km² | 12,247 |
| 19 | Berck | 894 inhab./km² | 12,951 |
| 20 | Saint-Omer | 872 inhab./km² | 14,382 |
| 21 | Carvin | 855 inhab./km² | 17,909 |
| 22 | Étaples | 855 inhab./km² | 10,710 |
| 23 | Saint-Martin-Boulogne | 843 inhab./km² | 10,888 |
| 24 | Montreuil-sur-Mer | 683 inhab./km² | 1,912 |
| 25 | Lillers | 383 inhab./km² | 10,193 |
| 26 | Marck | 325 inhab./km² | 10,467 |
| 27 | Le Touquet-Paris-Plage | 276 inhab./km² | 4,224 |
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.