Ahmadu can refer to:
Several leaders of the West African Massina Empire: Seku Amadu (1773–1845), Islamic sheikh and founder of the Massina Empire Amadu II of Masina (r. 1845–1852), his son Amadu III of Masina (1852–1862), his grandson
Other persons: Ahmadu Tall or Ahmadu Seku (1864–1892), the last independent Toucouleur ruler before the arrival of French colonial rule Ahmadu Bello, the first Premier of Northern Nigeria