John Mark Gannon

John Mark Gannon (June 12, 1877 – September 5, 1968) was an American Catholic prelate who served as Bishop of Erie from 1920 to 1966 and was given the personal title of "archbishop" in 1953. He previously served as an auxiliary bishop of the same diocese from 1918 to 1920.

Biography

Early life John Gannon was born in Erie, Pennsylvania, to Thomas Patrick and Julia (née Dunlavey) Gannon. His uncle was professional baseball player Gussie Gannon.

John Gannon attended St. Bonaventure's College in St. Bonaventure, New York, where he earned a Bachelor of Arts degree in 1899. He continued his studies at the Catholic University of America in Washington, D.C., earning a Bachelor of Sacred Theology degree (1900) and a Licentiate of Sacred Theology (1901).

Priesthood Gannon was ordained to the priesthood for the Diocese of Erie on December 21, 1901. In 1903, he earned Doctor of Divinity and Doctor of Canon Law degrees from the Apollinare University in Rome. He received his episcopal consecration on February 6, 1918, from Bishop Michael John Hoban, with Bishops Philip R. McDevitt and John Joseph McCort serving as co-consecrators.