John Patrick Treacy

Styles of John Patrick Treacy

Reference style	The Most Reverend
Spoken style	Your Excellency
Religious style	Monsignor
Posthumous style	none

John Patrick Treacy (July 23, 1891 – October 11, 1964) was an American prelate of the Roman Catholic Church who served as Bishop of the Diocese of La Crosse, Wisconsin from 1948 until his death in 1964.

Treacy was born in Marlborough, Massachusetts, the only child of John and Ann (née O'Kane) Treacy. He attended the College of the Holy Cross in Worcester, and studied at Harvard Law School before enrolling at the Catholic University of America in Washington, D.C. Following his graduation from the Catholic University in 1912, he returned to Massachusetts and studied at St. John's Seminary in Brighton.

He was ordained to the priesthood for the Diocese of Cleveland, Ohio, on December 8, 1918.

After 12 years in parish work, Treacy became diocesan director of the Society for the Propagation of the Faith in 1931. He was elevated to a domestic prelate by Pope Pius XI in 1934. In 1939, he was named by President Franklin D. Roosevelt to a 25-member committee for a good-neighbor mission to Latin America.