Largest cities
Lagos 9,000,000 pop., 14,540,000 urban aggl.
Kano 3,626,000 pop., 4,670,000 urban aggl.
Ibadan 3,565,000 pop., 3,657,000 urban aggl.
Kaduna 1,647,000 pop., 1,880,000 urban aggl.
Onitsha 1,499,000 pop., 7,205,000 urban aggl.
Abuja 1,236,000 pop., 2,420,000 urban aggl.
Ilorin 1,233,000 pop., 1,321,000 urban aggl.
Port Harcourt 1,149,000 pop., 3,429,000 urban aggl.
Benin City 1,125,000 pop., 1,905,000 urban aggl.
Warry 1,055,000 pop., 1,403,000 urban aggl.
Highest mountains
Chappal Waddi 2,419 m (7,936 ft)
Longest rivers
Niger 4,180 km (2,597 mi) total, 1,175 km (730 mi) in Nigeria
Benue 1,085 km (674 mi) total, 796 km (495 mi) in Nigeria
Largest lakes
Kainji Lake (artificial) 1,243 kmē (480 sq mi)