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Relationship dossier

Nigeria Sierra Leone

Relationship assessment

Practical regional cooperation, including Nigerian support for peace and security in Sierra Leone

Nigeria toward Sierra Leone

+25

Nigeria has supported peace and security efforts in Sierra Leone, including through regional and peacekeeping engagement, and has cooperated with Sierra Leone through ECOWAS.

Sierra Leone toward Nigeria

+25

Sierra Leone has participated in ECOWAS regional cooperation with Nigeria, including diplomacy and collective security efforts. The extent of additional direct bilateral initiatives is unclear.

Overall relationship

+25

The relationship is characterized by regional cooperation through ECOWAS and Nigerian involvement in peace and security efforts in Sierra Leone. These provide a substantive cooperative basis, while the scale of broader bilateral engagement is uncertain.

How to read these scores

Scores are rough judgments, not objective measurements or current verification. Directional scores describe government policy and conduct, not public opinion. The overall score is an independent estimate, never an average.

−100
Extreme sustained hostility
−50
Substantially adversarial
0
Mixed or neutral, supported by knowledge
+50
Substantially cooperative
+100
Exceptionally close sustained partnership

“Not assessed” means there is no recorded score. Pair existence makes no claim about diplomatic recognition or established relations.

Relationship context

Knowledge coverageLimited

Overview

Nigeria and Sierra Leone have cooperated through the Economic Community of West African States (ECOWAS), including regional diplomacy and security efforts. Nigeria has also contributed to peacekeeping and post-conflict support in Sierra Leone. These ties indicate practical regional cooperation, though the breadth and continuity of direct bilateral initiatives are unclear.

Key developments

Major uncertainties

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