Onitsha's 2025 population is now estimated at 1,767,110. In 1950, the population of Onitsha was 74,437. Onitsha has grown by 72,200 in the last year, which represents a 4.26% 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 | 2025 Pop. ↓ | Growth |
|---|---|---|
| Lagos | 17,156,400 | 3.75% |
| Kano | 4,645,320 | 3.44% |
| Abuja | 4,209,940 | 4.58% |
| Ibadan | 4,144,130 | 3.49% |
| Port Harcourt | 3,793,780 | 4.32% |
| Benin City | 2,044,650 | 3.65% |
| Onitsha | 1,767,110 | 4.26% |
| Uyo | 1,457,020 | 4.56% |
| Nnewi | 1,361,840 | 4.68% |
| Aba | 1,274,780 | 3.61% |
| Kaduna | 1,259,940 | 3.15% |
| Ikorodu | 1,196,820 | 4.51% |
| Ilorin | 1,099,960 | 3.41% |
| Warri | 1,076,120 | 4.33% |
| Owerri | 1,063,680 | 3.98% |
| Jos | 1,035,090 | 3.39% |
| Umuahia | 990,439 | 4.54% |
| Lokoja | 931,092 | 5.1% |
| Enugu | 906,658 | 3.55% |
| Maiduguri | 898,535 | 3.26% |
| Oshogbo | 822,497 | 3.35% |
| Zaria | 809,652 | 2.98% |
| Akure | 803,062 | 3.87% |
| Sokoto | 761,331 | 3.69% |
| Bauchi | 723,806 | 3.91% |
| Abakaliki | 723,065 | 4.4% |
| Calabar | 712,904 | 4.09% |
| Ogbomosho | 682,789 | 4.16% |
| Gombe | 619,995 | 3.98% |
| Abeokuta | 607,580 | 3.23% |
| Ado-Ekiti | 577,950 | 3.85% |
| Gwagwalada | 566,097 | 5.4% |
| Potiskum | 565,496 | 4.94% |
| Katsina | 564,796 | 3.83% |
| Okpogho | 551,191 | 4.3% |
| Okene | 546,482 | 3.58% |
| Minna | 532,497 | 3.7% |
| Igbidu | 528,270 | 3.5% |
| Gboko | 524,436 | 3.69% |
| Ondo | 509,723 | 3.61% |
| Oyo | 505,697 | 3.64% |
| Makurdi | 489,839 | 3.83% |
| Saki | 471,650 | 4.3% |
| Ikot Ekpene | 467,604 | 4.02% |
| Effon Alaiye | 456,749 | 3.72% |
| Birnin Kebbi | 445,671 | 3.96% |
| Ife | 438,074 | 3.53% |
| Ilesha | 431,992 | 3.9% |
| Ijebu-Ode | 408,731 | 3.67% |
| Lafia | 402,860 | 3.79% |
