Nigeria's Eastern Neighbor: Cameroon Shares a 2,000 km Border

The country directly east of Nigeria is Cameroon. The Nigeria-Cameroon border stretches approximately 1,975 km (1,227 miles) from Lake Chad in the north to the Gulf of Guinea in the south, making it Nigeria's longest international boundary.

Border Geography

The boundary follows a mix of natural features and colonial lines:

• North: Lake Chad basin (seasonal, shrinking)
• Central: Mandara Mountains (volcanic range, cross-border communities)
• South: Cross River / Manyu River system, dense rainforest
• Maritime: Gulf of Guinea (Bakassi Peninsula—disputed, ICJ awarded to Cameroon 2002, transferred 2006)

Cross-Border Dynamics

Ethnic continuity: Kanuri, Fulani, Mambilla, and Ejagham communities straddle the border. Trade: Informal cross-border commerce in cattle, grain, fuel, textiles. Security: Boko Haram/ISWAP insurgency in the north; separatist tensions in Anglophone Cameroon (Southwest/Northwest regions) create refugee flows both ways. Infrastructure: The Enugu-Bamenda highway (planned) would link Nigerian and Cameroonian economic hubs.

Other Eastern Neighbors

Nigeria also borders Chad (northeast, 85 km across Lake Chad) and has a maritime boundary with Equatorial Guinea (south-southeast, Gulf of Guinea). But Cameroon is the primary eastern land neighbor.