Philadelphia County, Pennsylvania

• Phladelphia@

• Library Company of Philadelphia  - Research specialists in American culture and history from the 17th to the 19th centuries.
• National Association of Counties: Philadelphia County, PA  - Offers contact information for the county elected officials. Includes also demographic and census data.
• National Register of Historical Places: Philadelphia County, Pennsylvania  - Gives a list of the historical properties in the county. Information includes data about the architectural style, signifacance, function, and builder.
• Philadelphia County Genealogy Trails  - Provides genealogy and history information including vital records, immigration, biographies, newspapers and surname list.
• Philadelphia County Genealogy: USGenWeb  - Offers genealogy research records for this county that includes local history, ethnic resources, directories and databases, family websites and obituary index.
• Philadelphia County Pennsylvania Genealogy  - Offers genealogy research for the county and the cities of Middle City East, Middle City West, Overbrook Hills, Philadelphia, Summerdale, William Penn Annex East, and William Penn Annex West.