Nigeria is signatory to some treaties and member of some international organisations, namely:
Political Alliances
· Commonwealth of Nations
· Group of 15
· Group of 24
· Group of 77
· Inter-Parliamentary Union
· Non-Aligned Movement
· Organization of American States – Observer status
Regional Unions
· African Union
· Parliamentary Union of the OIC Member States
Military alliances/Arms control
· Arms Trade Treaty
· Comprehensive Nuclear-Test-Ban Treaty Organization
· Conference on Disarmament
· Non-Proliferation and Disarmament Initiative
· Organisation for the Prohibition of Chemical Weapons
· South Atlantic Peace and Cooperation Zone
Law enforcement
· International Court of Justice
· International Criminal Court
· International Criminal Police Organization
Business Alliances
· African, Caribbean and Pacific Group of States
· BRICS Countries – Special status or association form
· Community of Sahel–Saharan States
· Economic Community of West African States
· International Cocoa Organization
· Organization of the Petroleum Exporting Countries
· United Nations Industrial Development Organization
· World Intellectual Property Organization
Fishery
· International Commission for the Conservation of Atlantic Tunas
Financial
· African Development Bank
· International Fund for Agricultural Development
· International Monetary Fund
· Islamic Development Bank
· OPEC Fund for International Development
· World Bank
Free Trade Area, Internal Market
· United Nations Conference on Trade and Development
· West African Monetary Zone
· World Trade Organization
Technical alliances
· African Energy Commission
· Energy Charter Treaty – Observer status
· International Atomic Energy Agency
· International Energy Forum
· International Hydrographic Organization
· International Network for Bamboo and Rattan
· International Organization for Standardization
· International Seabed Authority
· International Telecommunication Union
· United Nations International Strategy for Disaster Reduction
· Universal Postal Union
· World Organisation for Animal Health
· World Tourism Organization
Transport
· International Civil Aviation Organization
· International Maritime Organization
Scientific
· World Meteorological Organization
Humanitarian Unions
· Food and Agriculture Organization
· International Committee of the Red Cross
· International Labour Organization
· International Organization for Migration
· United Nations
· United Nations Children’s Fund
· United Nations Development Programme
· United Nations Educational, Scientific and Cultural Organization
· United Nations High Commissioner for Refugees
· United Nations Office for Project Services
· World Food Programme
· World Health Organization
Cultural Unions
· International Olympic Committee
· Organisation of Islamic Cooperation