Ouaddai's 2026 population is now estimated at 1,237,856. In 2009, the population of Ouaddai was 721,166. Ouaddai has grown by 30,393 in the last year, which represents a 2.52% annual change. These population values and projections come from INSEED ODP Population totale par province and World Population Review Internal Projections .
| City | 2026 Pop. ↓ | Growth |
|---|---|---|
| N'Djamena | 1,697,201 | 2.65% |
| Mayo-Kebbi-Est | 1,410,147 | 3.66% |
| Logone-Oriental | 1,390,235 | 2.65% |
| Ouaddai | 1,237,856 | 2.52% |
| Logone-Occidental | 1,229,161 | 2.65% |
| Tandjile | 1,180,751 | 2.65% |
| Mandoul | 1,120,383 | 2.65% |
| Moyen-Chari | 1,048,927 | 2.65% |
| Chari-Baguirmi | 1,031,832 | 2.65% |
| Hadjer Lamis | 1,011,198 | 2.65% |
| Mayo-Kebbi-Ouest | 978,896 | 1.24% |
| Guera | 960,359 | 2.65% |
| Wadi Fira | 906,887 | 2.65% |
| Batha | 871,343 | 2.65% |
| Lac | 773,823 | 2.65% |
| Sila | 739,785 | 2.88% |
| Kanem | 594,717 | 2.65% |
| Salamat | 539,264 | 2.65% |
| Bahr el Gazel | 458,929 | 2.65% |
| Ennedi Ouest | 197,626 | 4.25% |
| Borkou | 166,941 | 2.65% |
| Ennedi Est | 101,919 | -0.3% |
| Tibesti | 45,458 | 2.65% |
