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Diocese of Greensburg

Diocesan Mission

The Roman Catholic Diocese of Greensburg calls together the faithful in four southwestern Pennsylvania counties – Armstrong, Fayette, Indiana and Westmoreland​​ – under the leadership of the diocesan bishop, a successor of the Apostles, and in communion with the Holy Father, the bishop of Rome. The Catholics of this diocese, priests, deacons, religious and laity, work together to live out their baptismal call to proclaim, in word and action, the Gospel of Jesus, handed down to us through Scripture, tradition and the magisterium of the church. Our diocesan mission is continually realized by proclaiming God's word; celebrating the sacraments, especially the Eucharist; forming communities of faith; and building a just and compassionate society in this world so that we may be fulfilled human beings on this earth, and so that we may all share God's salvation in his kingdom.

Our Diocese At A Glance

On March 10, 1951, Pope Pius XII Canonically Erected the Diocese of Greensburg, placing her under the patronage of our Lady of the Assumption.The Diocese of Greensburg covers 3,334 square miles, and encompasses Armstrong, Fayette, Indiana, and Westmoreland Counties in the southwes​tern corner​ of the state of Pennsylvania. Bordering the western slopes of the Allegheny Mountains, our diocese is part of the region known as the "Gateway to the West." Westmoreland County, home to the city of Greensburg, is primarily urban, while the other three counties are more rural.


The early settlers in our diocesan area came from a rich array of ethnic backgrounds. Beginning in colonial days, people from all parts of Europe migrated to this region. Waves of Catholic immigrants from Ireland, Germany, Austria, Hungary, Poland and Slovakia settled here. At the turn of the century, many Italians came to this area as well, followed by the mostly Catholic Irish and Eastern Europeans, representing all of the middle European countries. The diocesan population reflects this rich ethnic heritage. 


In recent years, the region's large blue-collar base has been joined by a growing number of professional and white-collar workers, adding to the diverse human texture of the Diocese of Greensburg.

​The diocese sits atop one of the richest deposits of bituminous coal in the world, some of which has​ yet to be mined. The Allegheny and Monongahela rivers, which traverse the northern and southern sections of the diocese, carry barges that bring coal, river sand and gravel to the Midwest region and south.


Today, the Diocese serves the nearly 650,000 men and women of its four counties. With 149,000 Catholics, and 116 parishes, The Diocese of Greensburg serves as the faithful center of our local church, rooted in and continuing the Apostolic mission set forth by Christ to his disciples.


For more information, please visit our Diocesan Website:

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