Duca

Duca can refer to:

People

 * Duca (footballer), Adrualdo Barroso da Silva (born 1934), Brazilian footballer
 * Duca (singer) (デュッカ), Japanese female singer
 * Edoardo Duca (born 1997), Italian footballer
 * Ion G. Duca (1879–1933), 35th Prime Minister of Romania
 * Lauren Duca (born 1991), American journalist
 * Michael Duca (born 1952), American Catholic bishop
 * George Ducas (Romanian: Gheorghe Duca; c. 1620–1685), three times prince of Moldavia
 * Constantine Ducas (Moldavian ruler) (Romanian: Constantin Duca; died 1704), two times prince of Moldavia

Other

 * DUCA Credit Union, a Canadian credit union
 * a Romanesque title of duke, notably in Italian