Amadu II of Massina (أحمد بن أحمد حمادي; Fula: Amadu Amadu Hammadi; c. 1815 – February 1853), also called Amadu Seku, was the second Almami, or ruler, of the theocratic Caliphate of Hamdullahi or Diina of Hamdullahi in what is now Mali. He held this position from 1845 until his death in 1853. His rule was a short period of relative peace and prosperity between the violent reigns of his father and his son.