In Landes · INSEE, populations légales
Dax is the most densely populated city in Landes, at 1,122 inhab./km², ahead of Mont-de-Marsan (863 inhab./km²) and Tarnos (480 inhab./km²). At the other end, Biscarrosse is the least densely populated city, at 82 inhab./km².
| Rank | City | Density | Population |
|---|---|---|---|
| 1 | Dax | 1,122 inhab./km² | 22,109 |
| 2 | Mont-de-Marsan | 863 inhab./km² | 31,592 |
| 3 | Tarnos | 480 inhab./km² | 12,957 |
| 4 | Saint-Pierre-du-Mont | 382 inhab./km² | 10,092 |
| 5 | Soorts-Hossegor | 264 inhab./km² | 3,817 |
| 6 | Saint-Paul-lès-Dax | 248 inhab./km² | 14,481 |
| 7 | Biscarrosse | 82 inhab./km² | 15,836 |
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.