John Mark Gannon

Infobox bishopbiog
name = John Gannon


religion = Roman Catholicism
See = Erie
Title = Archbishop of Erie
Period = 1920 — 1966
Predecessor = John Edmund Fitzmaurice
Successor = John Francis Whealon
ordination = 21 December 1901
bishops = Auxiliary Bishop of Erie
post =
date of birth = birth date|1877|6|12
place of birth = Erie, Pennsylvania flagicon|Pennsylvania
date of death = death date and age|1968|09|5|1877|6|12
place of death = Erie, Pennsylvania flagicon|Pennsylvania

John Mark Gannon was the only bishop of the Diocese of Erie to have the title of Archbishop. He founded Cathedral Preparatory School in 1921. He founded Cathedral College in 1933, which was renamed Gannon University in his honor.