Catholic Church

• The Pennsylvania Catholic Conference
• United States Conference of Catholic Bishops
• The Holy See (Official Vatican Web Site)

Data Sources

• U.S. Census Bureau Home Page
• U.S. Census Bureau, Philadelphia Regional Office
• Historical United States Census Data Browser at the Univ. of Virginia

Pennsylvania and Regional Planning Agencies

• Pennsylvania State Data Center (PaSDC)
• Delaware Valley Regional Planning Commission
  • data bulletins
  • publications
• Bucks County Planning Commission
• Chester County Planning Commission
• Delaware County Planning Department
• Montgomery County Planning Commission
• Philadelphia City Planning Commission
  • Map of Philadelphia's 12 Planning Analysis Sections
  • Map Gallery
    

Education

• United States Conference of Catholic Bishops - Department of Education
• Pennsylvania State Department of Education
• PaProfiles - Pennsylvania School Profiles from the Pennsylvania Department of Education
• Catholic Education - Archdiocese of Philadelphia
  

Sources of Social Science Data

• American Religion Data Archive (ARDA)
• Center for the Study of Religion and American Culture
• Conference for Pastoral Planning and Council Development (CPPCD)
• Center for Applied Research in the Apostolate (CARA)
• Temple University Metropolitan Philadelphia Indicators Project
• Temple University Social Science Data Library
• University of Pennsylvania Cartographic Modeling Lab
• Villanova Center for the Study of Church Management

Libraries

• Catholic University of America
• La Salle University
• University of Notre Dame
• St. Joseph's University
• Temple University
• University of Pennsylvania
• Villanova University
• Saint Charles Borromeo Seminary

Sources of Geographic Information System (GIS) Data

• American Association of Geographers (AAG)
  
• Environmental Systems Research Institute (ESRI)
• ESRI Mid-Atlantic Users Group
• GIS Certification Institute (GISCI)
• Harvard University Center for Geographic Analysis
• National States Geographic Information Council (NSGIC)
• Pennsylvania GIS Users Conference (PaGIS) 
  
• Pennsylvania Spatial Data Access (PASDA)
  
• Urban and Regional Information Systems Association (URISA)
  
• URISA Mid-Atlantic Chapter (MACURISA)

Other

• American Planning Association (APA)
  
• Association for the Socilogy of Religion (ASR)
• Association of Statisticians of American Religiuos Bodies(ASARB)
• Glenmary Research Center
• Parishsurvey.org
• Pennsylvania Department of Health - Health Statistics
• U.S. Department of Labor, Bureau of Labor Statistics Facts, including Philadelphia Area Consumer Price Index
• Religious Research Association  (RRA)
• Society for the Scientific Study of Religion (SSSR)