John Joseph McMahon (September 27, 1875 – December 31, 1932) was an American prelate of the Roman Catholic Church.
[1] McMahon then attended St. Bonaventure University in Allegany, New York, earning a Bachelor of Arts degree.
[1] He also served as assistant superintendent of diocesan schools and director of the Holy Name Society.
[1] On March 2, 1928, McMahon was appointed the fourth bishop of the Diocese of Trenton by Pope Pius XI.
[1] After four years as bishop, John McMahon died in Buffalo at age 57 on December 31, 1932.