Giulio Monaco (died 1581) was a Roman Catholic prelate who served as Bishop of Lucera (1580–1581).^[1]

On 4 Nov 1580, Giulio Monaco was appointed during the papacy of Pope Gregory XIII as Bishop of Lucera.^[1] On 13 Nov 1580, he was consecrated bishop by Giulio Antonio Santorio, Cardinal-Priest of San Bartolomeo all'Isola, with Thomas Goldwell, Bishop of Saint Asaph, and Filippo Spinola, Bishop of Nola, serving as co-consecrators.^[1] He served as Bishop of Lucera until his death in 1581.^[1]

• Cheney, David M. "Diocese of Lucera-Troia". Catholic-Hierarchy.org. Retrieved June 16, 2018. (for Chronology of Bishops) ^{[self-published]}
• Chow, Gabriel. "Diocese of Lucera-Troi (Italy)". GCatholic.org. Retrieved June 16, 2018. (for Chronology of Bishops) ^{[self-published]}