Area: 2,165 Square Miles. Comprising the five counties of Philadelphia, Bucks, Chester, Delaware and Montgomery in the southeastern part of the Commonwealth of Pennsylvania.
When founded in 1808, the geographical area of the Diocese of Philadelphia included all of Pennsylvania, Delaware and the southern half of New Jersey. Eleven dioceses now serve this area. In Pennsylvania there are eight dioceses: the Archdiocese of Philadelphia, and the dioceses of Pittsburgh, Erie, Scranton, Harrisburg, Altoona-Johnstown, Greensburg and Allentown.
