• Federal Census Records at the Pennsylvania State Archives, 1790-1820 : Listing of the general contents of the Federal census records maintained at the Pennsylvania State Archives.
  
• Population of Pennsylvania Counties by Decennial Census: 1900 to 1990.
  
• Federal Census: Catalogs of NARA (National Archives) Microfilm:
       Census Schedules:  (1790-1840)  (1850)  (1860)  (1870)  (1880)  (1890)  (1900)  (1910)  (1920)
       Soundex:  (1880)  (1900)  (1910)  (1920)

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