John Patrick Carroll

John Patrick Carroll (Dubuque, Iowa, 22 February 1864 – Switzerland, 2 November 1925) was an American Catholic priest, who became the second Bishop of Helena, Montana, U.S.A. He was ordained a priest for the diocese of Cleveland on 7 July 1889 and was consecrated the second Bishop of Helena on 21 December 1904.

The diocesan college, Carroll College, is named for Bishop Carroll. He simultaneously built St. Helena's Cathedral and started Carroll College during the first decade of the 20th Century.