Onitsha's 2026 population is now estimated at 1,839,880. In 1950, the population of Onitsha was 74,437. Onitsha has grown by 72,770 in the last year, which represents a 4.12% 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 Onitsha, which typically includes Onitsha'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% |
| 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% |
| Umuahia | 1,033,090 | 4.31% |
| 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% |
