Settimio Borsari (died 29 April 1594) was a Roman Catholic prelate who served as Bishop of Casale Monferrato (1592–1594) and Bishop of Alessano (1591–1592).^[1]

On 20 November 1591, Settimio Borsari was appointed Bishop of Alessano by Pope Innocent IX.^[1] On 30 November 1591, he was consecrated bishop by Girolamo Bernerio, Bishop of Ascoli Piceno, with Galeazzo Moroni, Bishop of Macerata e Tolentino, and Ottavio Abbiosi, Bishop of Pistoia, serving as co-consecrators.^[1]

On 12 June 1592, he was appointed Bishop of Casale Monferrato by Pope Clement VIII.^[1] He served as Bishop of Casale Monferrato until his death on 29 April 1594.^[1]

• Catholic Church in Italy

• Cheney, David M. "Diocese of Alessano". Catholic-Hierarchy.org. Retrieved June 16, 2018. (for Chronology of Bishops) ^{[self-published]}
• Chow, Gabriel. "Titular Episcopal See of Alessano (Italy)". GCatholic.org. Retrieved June 16, 2018. (for Chronology of Bishops) ^{[self-published]}
• Cheney, David M. "Diocese of Casale Monferrato". Catholic-Hierarchy.org. Retrieved January 4, 2019. (for Chronology of Bishops) ^{[self-published]}
• Chow, Gabriel. "Diocese of Casale Monferrato (Italy)". GCatholic.org. Retrieved January 4, 2019. (for Chronology of Bishops) ^{[self-published]}