Kollo's 2026 population is now estimated at 22,627. In 1988, the population of Kollo was 5,755. Kollo has grown by 681 in the last year, which represents a 3.1% annual change. These population values and projections come from Niger city census series 1977-2012 via CityPopulation official attribution, Niger ReNaLoc locality-based census extraction (2012) and World Population Review Internal Projections .
| City | 2026 Pop. ↓ | Growth |
|---|---|---|
| Niamey | 1,523,856 | 3.22% |
| Maradi | 538,173 | 5.13% |
| Zinder | 355,392 | 2.98% |
| Tahoua | 216,694 | 4.45% |
| Agadez | 174,806 | 3.33% |
| Birni N'Konni | 98,201 | 3.2% |
| Arlit (incl. Akokan) | 93,194 | 1.22% |
| Dosso | 85,707 | 2.74% |
| Gaya | 82,805 | 4.38% |
| Diffa | 78,922 | 4.98% |
| Tessaoua | 64,849 | 2.91% |
| Dakoro | 51,249 | 4.08% |
| Dogondoutchi | 49,826 | 2.15% |
| Tera | 48,481 | 3.71% |
| Matameye | 47,847 | 4% |
| Mirriah | 46,888 | 3.65% |
| Abalak | 43,272 | 5% |
| Magaria | 41,918 | 3.49% |
| N'Guigmi | 39,206 | 3.67% |
| Madaoua | 37,591 | 2.13% |
| Illela | 35,237 | 3.26% |
| Tillaberi | 33,842 | 2.87% |
| Guidan Roumdji | 32,665 | 4.55% |
| Tchintabaraden | 30,045 | 4.94% |
| Aguie | 29,544 | 3.86% |
| Tanout | 28,096 | 2.33% |
| Goure | 27,114 | 2.85% |
| Kollo | 22,627 | 3.1% |
| Birni N'Gaoure (Boboye) | 20,927 | 2.69% |
| Mayahi | 19,206 | 2.74% |
| Say | 18,728 | 2.34% |
| Madarounfa | 18,658 | 3.07% |
| Maine-Soroa | 18,179 | 2.35% |
| Bouza | 17,440 | 3.78% |
| Ouallam | 16,481 | 3.21% |
| Keita | 13,069 | 1.67% |
| Filingue | 12,980 | 0.43% |
| Tchirozerine | 9,015 | -0.42% |
| Loga | 8,057 | 1.24% |
| Bilma | 4,319 | 0.54% |
