- Chris Abani (born 1966), novelist, playwright and poet
- Chinua Achebe (1930–2013), novelist, poet and critic
- Catherine Obianuju Acholonu (born 1951), academic
- Remi Adedeji (born 1937), children’s writer and academic editor
- Abimbola Adelakun, novelist
- Sade Adeniran, novelist and filmmaker
- Saheed Aderinto (born 1979), author and academic
- Akin Adesokan, novelist and scholar
- Toyin Adewale-Gabriel (born 1969), poet
- Chimamanda Ngozi Adichie (born 1977), novelist and poet
- S. A. Afolabi (born 1966)
- Ifeoma Aggrey-Fynn (d. 2015), writer
- Tolu Ajayi (born 1946), poet and writer of fiction
- Tolu Akinyemi, writer, poet
- Yemi Ajibade (1929–2013), playwright and actor
- Audrey Ajose (born 1937?), journalist and juvenile fiction writer
- Uwem Akpan (born 1971), Jesuit priest and writer
- Hauwa Ali (died 1995), novelist
- Akilu Aliyu (1918–1998), poet
- Zaynab Alkali (born 1950), novelist, short-story writer and academic
- T. M. Aluko (1918–2010), novelist and autobiographer
- Elechi Amadi (1934–2016), novelist
- Ifi Amadiume (born 1947), poet, anthropologist and essayist
- Karen King-Aribisala, short-story writer, novelist and academic
- Yemisi Aribisala (born 1973), essayist and food memoirist
- Nana Asmau (1793–1864)
- Odafe Atogun, writer
- Sefi Atta (born 1964), novelist, short-story writer and playwright
- Uche Azikiwe (born 1947), author
- Nnorom Azuonye (born 1967), theatre director, playwright and poet
- Ayobami Adebayo, novelist
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