John Vertin (July 17, 1844 – February 26, 1899) was a Slovenian-born American prelate of the Roman Catholic Church.

[1] At age 18, John Vertin arrived in New York City with his parents and siblings on July 7, 1863, and departed for Michigan.

[5] Vertin was ordained a priest for the Diocese of Sault Sainte Marie and Marquette on August 31, 1866, by Bishop Frederic Baraga.

[1] On May 16, 1879, Vertin was appointed the third bishop of the Diocese of Sault Sainte Marie and Marquette by Pope Leo XIII.

This was allegedly an act of arson by some angry parishioners over the removal of the cathedral's pastor, Reverend John Kenny.