Rosso's 2026 population is now estimated at 45,821. In 2000, the population of Rosso was 29,882. Rosso has grown by 1,082 in the last year, which represents a 2.42% annual change. These population values and projections come from Mauritania localities census rows 2000 via CityPopulation official attribution, Mauritania localities census rows 2013 and 2023 via CityPopulation official attribution, Mauritania RGPH 2023 urban population indicators by commune (direct ANSADE workbook) and World Population Review Internal Projections .
| City | 2026 Pop. ↓ | Growth |
|---|---|---|
| Nouakchott | 1,637,012 | 4.2% |
| Nouadhibou | 194,725 | 3.92% |
| Kiffa | 79,794 | 3.63% |
| Zouerate | 68,964 | 3.4% |
| Kaedi | 61,897 | 2.39% |
| Selibabi | 46,738 | 4.49% |
| Rosso | 45,821 | 2.42% |
| Guerou | 40,510 | 4.69% |
| Nema | 40,000 | 4.81% |
| Aioun | 39,563 | 4.33% |
| Camp de Refugies de Mbera | 39,492 | -1.45% |
| Tintane | 37,549 | 5.13% |
| Atar | 37,224 | 3.05% |
| Timbedra | 34,720 | 5.13% |
| Magta-Lahjar | 23,619 | 5.02% |
| Boutilimit | 23,405 | 3.06% |
| Bassikounou | 22,628 | 5.13% |
| Adel Bagrou | 21,260 | 5.12% |
| Boghe | 20,100 | 1.57% |
| Tidjikdja | 19,543 | 4.59% |