| Honorific Prefix: | Major General |
| Office1: | Senator for Abia North |
| Term Start1: | 3 June 1999 |
| Term End1: | 3 June 2003 |
| Successor1: | Uche Chukwumerije |
| Office2: | Foreign Minister of Nigeria |
| President2: | Ibrahim Babangida |
| Term Start2: | September 1990 |
| Term End2: | January 1993 |
| Predecessor2: | Rilwan Lukman |
| Successor2: | Matthew Mbu |
| President3: | Ibrahim Babangida |
| Term Start3: | December 1987 |
| Term End3: | December 1989 |
| Predecessor3: | Bolaji Akinyemi |
| Successor3: | Rilwan Lukman |
| Office4: | General Officer Commanding 1st Division, Nigerian Army |
| Term Start4: | January 1990 |
| Term End4: | September 1990 |
| Predecessor4: | Maj Gen M.S. Sami |
| Successor4: | Maj Gen A.A. Abubakar |
| Office5: | Minister of Labour |
| President5: | Ibrahim Babangida |
| Term Start5: | December 1985 |
| Term End5: | December 1987 |
| Office6: | Military Governor of Imo State |
| Term Start6: | January 1984 |
| Term End6: | August 1985 |
| Predecessor6: | Sam Mbakwe |
| Successor6: | Allison Madueke |
| Birth Date: | 1 September 1940 |
| Birth Place: | Port Harcourt, Southern Region, British Nigeria (now in Rivers State, Nigeria) |
| Allegiance: |  Nigeria |
| Rank: | Major general |
Ike Omar Sanda Nwachukwu (; born 1 September 1940)[1] is a retired Nigerian Army major general and politician who served twice as Foreign Minister of Nigeria during the military regime of General Ibrahim Babangida, and as a Senator for Abia North from 1999 to 2003.
Born on 1 September 1941 in Port Harcourt to an Igbo father and a Fulani mother of Katsina,[2] Nwachukwu had his early education at the Ladi-Lak Institute, Yaba, Lagos, and Lagos City College, also in Yaba, Lagos. He obtained his initial military training at the Nigerian Military Training College, Kaduna, course 6, then proceeded to the Royal Canadian School of Infantry, and then furthered his training at the School of Infantry, Warminster, United Kingdom. He also studied at the Institute of Humanitarian Law, San Remo, Italy, the United Nations Peace Academy, and the National Institute for Policy and Strategic Studies (NIPPS), Kuru, Plateau State.Ike Nwachukwu rose to the rank of major general prior to his retirement with the Nigerian Army.
Nwachukwu held the position of Military Governor of Imo State,[3] where he moved Imo State University (now Abia State University) in Uturu to its permanent site.[4] From 1986 to 1987 he was Minister for Employment, Labour and Productivity, where he founded the National Directorate of Employment (NDE) to alleviate the problems of unemployment, especially graduate unemployment.
Nwachukwu was Minister of Foreign Affairs from December 1987 to December 1989, when he was replaced by Rilwanu Lukman, returning to a field military command position. In September 1990 he was re-appointed Minister of Foreign Affairs, being replaced in January 1993 by Matthew Mbu during the transition to civilian rule. He was active and effective as Foreign Minister, taking a mercantilist approach to diplomacy.[5]
Among the organizations and groups Nwachukwu has served as the chairman of are the Organization of African Unity Liberty Committee, the Organization of African Unity Council of Ministers (three terms), the Economic Community of West African States Council of Ministers, plenary sessions of the Non-Aligned Movement, and the Governing Council of the African Regional Labour Administration Center.
Nwachukwu has headed and led several delegations to various international summits and negotiations, and obtained resolutions from the United Nations on behalf of Nigeria. Some of them include: addressing the United Nations General Assembly and chairing United Nations special sessions on varying subjects, leading the Organization of African Unity Ministerial Delegation to the Conference for Democratisation of South Africa, leading Nigeria's negotiations for Agenda 21 and the convention at the Earth Summit in Rio de Janeiro, Brazil.
As an Abia State senator, Nwachukwu served as Chairman of two senate committees, the Senate Committee on Power and Steel and the Senate Committee on Governmental Affairs.
Nwachukwu was conferred with several medals and decorations whilst in military service, as well as traditional titles in his present status as a civilian.
Nwachukwu's national decorations and service medals include: the Nigerian Independence Medal, the Forces Service Star, the Defence Service Star, the Nigeria Republic Medal, the National Service Medal, and Commander of the Order of the Federal Republic of Nigeria (CFR).
Nwachukwu has been awarded three national merit awards. They are the Special Certificate of Merit of the African Youth Congress, the Award of Recognition of the Iron and Steel Senior Staff Association of Nigeria (ISSSAN), and the Merit Award by Achike Udenwa, former Governor of Imo State, on the occasion of the state's Silver jubilee.
Nwachukwu has been conferred with several international medals and awards, which include the Grand Commander of Equatorial Guinea, presented by the President of Equatorial Guinea, the Federal Republic of Germany's Grand Cross of Merit (GMCS), the Grand Master of the National Order of the Southern Cross (GMSC), from the President of Brazil, the Diplomatic Medal (DMM) from the President of the South Korea, the Grand Cruz de la Order dei Merito Civil de Espana (GCMC), by King Juan Carlos I of Spain, the Knight Grand Cross of the Order of St Michael and St George (GCMG), awarded by Queen Elizabeth II of the United Kingdom, and the Commander of the Order of Mono (COM) from Gnassingbé Eyadéma, President of Togo.[6]