The following lists events in 1999 in Nigeria.

Incumbents

Federal government

• President: Abdulsalami Abubakar (until 29 May), Olusegun Obasanjo (starting 29 May)
• Vice President: Michael Akhigbe (until 29 May), Atiku Abubakar (starting 29 May)
• Senate President:
  • Until 3 June: Abolished
  • 3 June – 18 November: Evan Enwerem
  • Starting 18 November: Chuba Okadigbo
• House Speaker:
  • Until 3 June: Abolished
  • 3 June – 23 July Salisu Buhari
  • Starting July Ghali Umar Na'Abba
• Chief Justice: Muhammad Lawal Uwais

Events

February

• February 10 — Former Head of State, Olusegun Obasanjo wins the presidential election.

May

• May 10 — Igbinedion University, Okada is established.^[1]
• May 29 — The Nigerian Fourth Republic is inaugurated. Olusegun Obasanjo is sworn in as the second Executive President of Nigeria.

December

• December 19 — President Obasanjo orders troops to raid the town of Odi in the Niger Delta, in response to the murders of twelve policemen at the hands of local militia; The troops razed the town of Odi.

Births

• July 14 – Adijat Adenike Olarinoye, weightlifter^[2]