Roman Catholic Diocese of Pittsburgh
Overview
 
The Roman Catholic Diocese of Pittsburgh is a Roman Catholic diocese
Diocese
A diocese is the district or see under the supervision of a bishop. It is divided into parishes.An archdiocese is more significant than a diocese. An archdiocese is presided over by an archbishop whose see may have or had importance due to size or historical significance...

. It was established in Western Pennsylvania
Western Pennsylvania
Western Pennsylvania consists of the western third of the state of Pennsylvania in the United States. Pittsburgh is the largest city in the region, with a metropolitan area population of about 2.4 million people, and serves as its economic and cultural center. Erie, Altoona, and Johnstown are its...

 on August 11, 1843. The diocese includes 211 parishes in the counties of Allegheny, Beaver
Beaver County, Pennsylvania
-Demographics:As of the census of 2000, there were 181,412 people, 72,576 households, and 50,512 families residing in the county. The population density was 418 people per square mile . There were 77,765 housing units at an average density of 179 per square mile...

, Butler
Butler County, Pennsylvania
-Demographics:As of the census of 2000, there were 174,083 people, 65,862 households, and 46,827 families residing in the county. The population density was 221 people per square mile . There were 69,868 housing units at an average density of 89 per square mile...

, Greene
Greene County, Pennsylvania
-Demographics:As of the census of 2000, there were 40,672 people, 15,060 households, and 10,587 families residing in the county. The population density was 71 people per square mile . There were 16,678 housing units at an average density of 29 per square mile...

, Lawrence
Lawrence County, Pennsylvania
Lawrence County is a county located in the U.S. state of Pennsylvania. In 2010, its population was 91,108. The county was added to the Pittsburgh Metropolitan Statistical Area in 2003. The county seat is New Castle....

, and Washington
Washington County, Pennsylvania
-Government and politics:As of November 2008, there are 152,534 registered voters in Washington County .* Democratic: 89,027 * Republican: 49,025 * Other Parties: 14,482...

, an area of 3753 square miles (9,720.2 km²) with a Catholic population of 719,801 as of June 2008. The cathedral
Cathedral
A cathedral is a Christian church that contains the seat of a bishop...

 church of the diocese is the Cathedral of Saint Paul
Cathedral of Saint Paul in Pittsburgh
The Cathedral of Saint Paul is the mother church of the Roman Catholic Diocese of Pittsburgh, Pennsylvania, United States...

. As of March 2009, the diocese had 280 active priests. The diocese is in the process of reorganizing its schools; sixteen elementary schools have been closed since 2005.
The diocese of Pittsburgh was erected from the Diocese of Philadelphia
Roman Catholic Archdiocese of Philadelphia
The Roman Catholic Archdiocese of Philadelphia is an ecclesiastical territory or diocese of the Roman Catholic Church in southeastern Pennsylvania, in the United States. It covers the City and County of Philadelphia as well as Bucks, Chester, Delaware, and Montgomery counties. The diocese was...

 on August 11, 1843.
 
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