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| Name | Metro population (millions) |
| Aba | 1.5 |
| Abuja | 1.2 |
| Benin | 2.2 |
| Ibadan | 5.2 |
| Ilorin | 1.1 |
| Kaduna | 2.0 |
| Kano | 4.5 |
| Lagos | 13.1 |
| Maidaguri | 1.1 |
| Ogbomosho | 1.2 |
| Onitsha | 1.5 |
| Oshogbo | 1.9 |
| Port Harcourt | 2.0 |
| Name | Alternate names |
| Jos | |
| Katsina | |
| Ngazargamu | Kazargamu |
| Oyo | Katunga |
| Turunku | Sabon Turunku |
| Zaria | Zauzau, Zegzeg, Zakzak, Zozo |
(1) world-gazetteer.com, accessed 11/11/2009, Africa page; both 2009 estimates.
(2) Listed in Zaria article in Courtlandt Canby, The Encyclopedia of Historic Place (Facts of File Publications, 1984)