Below are the urban areas with more than 100,000 inhabitants in Mauritania ranked by population.
Urban Area (or urban agglomeration) population refers to the population contained within the contours of a contiguous territory inhabited at urban density levels, typically comprising a city and its surrounding suburban fringe.
| Rank | Urban Area | Population Estimate (2025) | 1 Year Change (over 2024) | Land Area (Km²) | Density (P/Km²) | Global Rank | Projections (2030) | Projections (2050) |
|---|---|---|---|---|---|---|---|---|
| 1 | Nouakchott | 1,561,617 | 2.6% | 188 | 8,306 | 319 | 1,774,185 | 2,633,046 |
| 2 | Nouadhibou | 179,362 | 3.23% | 47 | 3,816 | 3,375 | 206,656 | 328,505 |
| 3 | Fassala | 105,382 | 2.55% | 7 | 15,055 | 5,853 | 119,109 | 191,779 |
| 4 | Kiffa | 80,914 | 1.98% | 20 | 4,046 | 7,712 | 86,516 | 119,258 |
| 5 | Kaédi | 59,221 | 1.71% | 11 | 5,384 | 10,449 | 64,627 | 82,722 |
| 6 | Zouérat | 54,869 | – | 10 | 5,487 | 11,216 | 66,419 | 113,724 |
Source: United Nations, Department of Economic and Social Affairs, Population Division (2025). World Urbanization Prospects: The 2025 Revision, Online Edition.