Amadu is a given name. Notable people with the name include:
- John Amadu Bangura (1920–1970), the acting Governor-General of Sierra Leone from 18 April to 22 April 1968
- Alfred Amadu Conteh, African American sculptor, painter and mixed-media artist
- Amadu Diallo, 23-year-old US immigrant from Guinea shot and killed by four plain-clothed police officers
- Amadu Jalloh, politician in Sierra Leone
- Yulisa Pat Amadu Maddy (1936–2014), Sierra Leonean actor, dancer, director and playwright
- Tejan Amadu Mansaray, Sierra Leonean politician
- Amadu II of Masina (1845–1853), ruler of the nineteenth-century Massina Empire in what is now Mali
- Amadu III of Masina (1830–1862), the last ruler of the Fula Massina Empire in what is now the Mopti Region of Mali
- Amadu Sulley, Ghanaian public official
- Amadu Turé (born 1993), Guinea-Bissauan footballer
- Amadu Wurie (1898–1977), early Sierra Leonean educationist and politician
- Moses Amadu Yahaya, Ghanaian building technician, politician and Member of Parliament
- Amadu Yusufu (born 1958), Malawian former cyclist
- Amadú (born 1996), Amade Momade Issufo, Mozambican footballer
Amadu is also a surname. Notable people with the name include:
- Latif Amadu (born 1993), Ghanaian professional footballer
- Mamood Amadu (born 1972), football player from Ghana
- Seku Amadu (1773–1845), founder of the Fula Massina Empire in what is now the Mopti Region of Mali