| 24th Infantry Regiment in Korea (1950-1951) | Institutions |
| 25th Dynasty, Ancient Egypt (ca. 746 BC to 653 BC) | People |
| Aba Women's Riots (November-December 1929) | Events |
| Abbott, Anderson Ruffin (1837-1913) | People |
| Abbott, Diane (1953- ) | People |
| Abidjan, Côte d'Ivoire (1903- ) | Places |
| Abrahams, Peter (1919-- ) | People |
| Accra, Ghana (ca. 1500- ) | Places |
| Achebe, Chinua (1930-2013) | People |
| Achimota College\Achimota School (1924-- ) | Institutions |
| Addis Ababa (1886- ) | Places |
| African Civilization Society, The (1858-1869) | Organizations |
| African Democratic Rally (1946- ) | Organizations |
| African National Congress (ANC) | Organizations |
| African Union (2002- ) | Organizations |
| Africans at Hadrian's Wall | Places |
| Ahmadu Bello University (founded 1962) | Institutions |
| Ajala, Godwin O. (1968–2001) | People |
| al-Sadat, Muhammad Anwar (1918-1981) | People |
| Aleijadinho (Antonio Francisco Lisboa, 1738-1814) | People |
| Alexander, Lincoln MacCauley (1922-2012) | People |
| Algiers, Algeria (circa 9th century AD--) | Places |
| Ali, Ayaan Hirsi (1969- ) | People |
| Ali, Duse Mohamad (1866-1945) | People |
| Allen, Damon (1963- ) | People |
| Amazons (Ahosi) of Dahomey | People |
| Ambar, Malik (1548--1626) | People |
| Americo-Liberians | People |
| Amin (Dada), Idi (1925-2003) | People |
| Amo, Anton Wilhelm (1703? -1753) | People |
| Ancient Kush (2nd millennium B.C. – 4th century A.D.) | Places |
| Ancient Nubia (ca. 5000 BC – 500 AD) | Places |
| Angolan Civil War (1975-2002) | Events |
| Annan, Kofi A. (1938-- ) | People |
| Apartheid (1948-1994) | Misc |
| Armatrading, Joan (1950-- ) | People |
| Arusha Declaration, The (1967) | Misc |
| Ashanti Empire/ Asante Kingdom (18th to late 19th century) | Places |
| Asmara, Eritrea (ca. A.D. 1000-- ) | Places |
| Awolowo, Obafemi (1909-1985) | People |
| Axum (ca. 100 B.C.E.-ca. 650 A.D.) | Places |
| Azikiwe, Benjamin Nnamdi "Zik" (1904-1996) | People |
| Ba, Mariama (1929-1981) | People |
| Baca, Susana (1944- ) | People |
| Bahutu Manifesto (1957) | Events |
| Baker, Josephine (1906-1975) | People |
| Balewa, Sir Abubakar Tafawa (1912-1966) | People |
| Banda, Dr. Hastings Kamuzu (c. 1896-1997) | People |
| Bandung Conference, 1955 | Events |
| Baquaqua, Mahommah Gardo (1824?-1857?) | People |