Gatumba's 2026 population is now estimated at 11,700. In 2008, the population of Gatumba was 11,700. These population values and projections come from INSBU RGPH 2008 Chapitre 1 (ETA5) - urban and rural population by commune and World Population Review Internal Projections .
| City | 2026 Pop. ↓ | Growth |
|---|---|---|
| Bujumbura | 758,892 | 1.95% |
| Ngozi | 65,257 | 2.21% |
| Gitega | 63,180 | 1.9% |
| Rumonge | 56,046 | 2.04% |
| Cibitoke | 39,490 | 2.24% |
| Bubanza | 37,117 | 2.62% |
| Kayanza | 36,653 | 2.31% |
| Karuzi | 17,231 | 2.28% |
| Kirundo | 14,867 | 1.84% |
| Muyinga | 13,685 | 1.68% |
| Makamba | 13,594 | 1.74% |
| Ruyigi | 11,901 | 2.28% |
| Gatumba | 11,700 | 0% |
| Rutana | 9,786 | 2.28% |
| Muramvya | 8,626 | 2.08% |
| Cankuzo | 5,605 | 2% |
| Isale | 4,977 | 0% |
| Bururi | 4,478 | 0% |
| Kanyosha | 4,272 | 0% |
| Bwambarangwe | 4,044 | 0% |
| Kayogoro | 3,538 | 0% |
| Mabanda | 3,249 | 0% |
| Mwaro | 2,403 | 0% |
| Giteranyi | 2,146 | 0% |
| Mugongomanga | 2,086 | 0% |
| Matana | 2,054 | 0% |
