Akojo awon olori orile-ede Nigeria lati July 1, 1960.Heads of State of Nigeria (1960-present)Igba Oselu Akoko Naijiria (1963-1966)First Military Regime (1966-1979)Igba Oselu Ikeji Naijiria (1979-1983)Second Military Regime (1983-1999)Nigerian Fourth Republic (1999-present)ItokasiNaijiria.. 
Ni akọọlẹ ninu isọ 3166-2, apa tunṣe iṣọ 3166 ti International Organization for Standarzation (iṣọ) tẹjadesí to ṣètumọ̀ awọn ami fun orukọ awọn ipin koko koko awọn orilẹ-itọkasi.isọ 3166.. 