Julius Maada Wonie Bio is a Sierra Leonean politician who has served as president of Sierra Leone since 4 April 2018. He is a retired brigadier in the Sierra Leone Army and was the military head of state of Sierra Leone from 16 January 1996 to 29 March 1996, in a military junta government known as the National Provisional Ruling Council (NPRC).

The president of the Republic of Sierra Leone is the head of state and the head of government of Sierra Leone, as well as the commander-in-chief of the Armed Forces.