Duce is a Croatian village situated close to Omiš in the Split-Dalmatia County. It is a series of small settlements in Poljica, the area between the foot of the Mosor mountains and the Adriatic Sea.

Duce (, leader) is an Italian title, derived from the Latin word dux, and cognate with duke. National Fascist Party leader Benito Mussolini was identified by Fascists as Il Duce ("The Leader") of the movement and it became a reference to the dictatorial position of Sua Eccellenza Benito Mussolini, Capo del Governo, Duce del Fascismo e Fondatore dell'Impero ("His Excellency Benito Mussolini, Head of Government, Duce of Fascism and Founder of the Empire"). It was established in 1925. Mussolini held together with this title that of President of the Council of Ministers: this was the constitutional position which entitled him to rule Italy on behalf of the King of Italy. Founder of the Empire was added for the exclusive use by Mussolini in recognition of his founding of an official legal entity of the Italian Empire on behalf of the King in 1936 following Italy's victory in the Second Italo-Ethiopian War. The position was held by Mussolini until 1943, when he was removed from office by the King and the position of "Duce" was dismantled, while Marshal Pietro Badoglio was appointed Presidente del Consiglio.

The Dar es Salaam University College of Education (DUCE) is a constituent college of the University of Dar es Salaam in Tanzania.