Michael Gerard Duca (born June 5, 1952) is an American prelate of the Roman Catholic Church who has been serving as bishop of the Diocese of Baton Rouge in Louisiana since his installation on August 24, 2018.

[2] In 1994, Duca traveled to Rome to study at the Pontifical University of St. Thomas Aquinas, receiving a Licentiate in Canon Law in 1996.

[2] After returning to Texas in 1996, Duca was named rector of Holy Trinity Seminary, a position he would hold until 2008.

Duca was appointed as bishop of Shreveport by Pope Benedict XVI on April 1 2008.

[4] He was consecrated by Archbishop Alfred Hughes on May 19, 2008, at the Shreveport Convention Center, with approximately 3,000 people in attendance.