Sergius of Naples may refer to
Sergius I of Naples (died 864) Sergius II of Naples, Duke of Naples from 870 to 877 Sergius III of Naples Sergius IV of Naples (died after 1036) Sergius V of Naples, son and successor of John V as Duke of Naples from 1042 to 1082 Sergius VI of Naples (died 1097 or 1107) Sergius VII of Naples (died 1137)