Exarchate

In 1924, the church had been established by the Holy See as an exarchate, known as the '"Apostolic Exarchate of Pittsburgh for Faithful of the Oriental Rite (Ruthenian)'". Exarchate is an ecclesiastical term which indicates a "missionary diocese" or territory.

This move separated the Ruthenian Greek Catholic Church in the United States into two distinct groups: one for those originating from Galicia (in modern-day Ukraine) with its see in Philadelphia, Pennsylvania, and the other for those who were from the Carpathian Mountain region (in modern-day Ukraine and Slovakia), as well as those from Hungary and Croatia. In time, the two groups would come to be known as Ukrainian Greek Catholics and Ruthenian Greek Catholics, respectively.

(Arch)Eparchy

The Exarchate of Pittsburgh was elevated to the status of an eparchy in 1963.

Byzantine Catholics in the United States were given sui iuris (self-governing) status as a Metropolia (archdiocese) by Pope Paul VI in 1969. Archbishop Stephen Kocisko was installed as the first Metropolitan-Archbishop on June 11, 1969, at Holy Spirit Church in Oakland (Pittsburgh). He was the first prelate in the history of people from the Subcarpathian Rus region (of present-day Ukraine and Slovakia) to hold this rank.

Parishes

As of 2010, the Archeparchy has 85 parishes under its canonical jurisdiction.

The majority of the archepachy's parishes are located in Western Pennsylvania, particularly in the Pittsburgh and Johnstown metropolitan areas.

Although most Ohio parishes are under the jurisdiction of the Byzantine Catholic Eparchy of Parma, 5 churches in metropolitan Youngstown and 5 churches in Ohio River communities are governed by the archeparchy.

Additionally, there are churches in the following states: Louisiana (1), Tennessee (1), Texas (4), and West Virginia (2).