Umuahia's 2026 population is now estimated at 1,033,090. In 1950, the population of Umuahia was 13,255. Umuahia has grown by 42,651 in the last year, which represents a 4.31% annual change. These population estimates and projections come from the latest revision of the UN World Urbanization Prospects. These estimates represent the Urban agglomeration of Umuahia, which typically includes Umuahia's population in addition to adjacent suburban areas.
| City | 2026 Pop. ↓ | Growth |
|---|---|---|
| Lagos | 17,803,700 | 3.77% |
| Kano | 4,810,810 | 3.56% |
| Abuja | 4,392,360 | 4.33% |
| Ibadan | 4,293,160 | 3.6% |
| Port Harcourt | 3,951,670 | 4.16% |
| Benin City | 2,120,460 | 3.71% |
| Onitsha | 1,839,880 | 4.12% |
| Uyo | 1,520,020 | 4.32% |
| Nnewi | 1,421,790 | 4.4% |
| Aba | 1,321,630 | 3.67% |
| Kaduna | 1,302,330 | 3.36% |
| Ilorin | 1,138,890 | 3.54% |
| Warri | 1,120,980 | 4.17% |
| Owerri | 1,105,500 | 3.93% |
| Jos | 1,071,590 | 3.53% |
| Lokoja | 974,767 | 4.69% |
| Enugu | 939,642 | 3.64% |
| Maiduguri | 929,408 | 3.44% |
| Zaria | 835,966 | 3.25% |
| Akure | 834,009 | 3.85% |
| Sokoto | 789,726 | 3.73% |
| Abakaliki | 753,507 | 4.21% |
| Bauchi | 751,900 | 3.88% |
| Calabar | 741,455 | 4% |
| Gombe | 644,375 | 3.93% |
| Abeokuta | 628,365 | 3.42% |
| Ado-Ekiti | 600,157 | 3.84% |
| Potiskum | 591,410 | 4.58% |
| Katsina | 586,424 | 3.83% |
| Okene | 566,476 | 3.66% |
| Minna | 552,407 | 3.74% |
| Ondo | 528,471 | 3.68% |
| Oyo | 524,409 | 3.7% |
| Makurdi | 508,595 | 3.83% |
| Saki | 491,205 | 4.15% |
| Ikot Ekpene | 486,091 | 3.95% |
| Birnin Kebbi | 463,133 | 3.92% |
| Ijebu-Ode | 423,938 | 3.72% |
| Lafia | 418,172 | 3.8% |
