First Census of the United States, 1790.  M637
     Roll #8 - Berks, Chester, Delaware, Huntingdon, Mifflin (part), Luzerne,
                    Dauphin, Northampton, Cumberland, Fayette, Westmoreland
                    (part), Bucks, and Lancaster Counties--also have in book form.
     Roll #9 - Montgomery, Westmoreland (part), Allegheny, Washington, Bedford,
                    Franklin, York, Northumberland, Mifflin (part), and Philadelphia
                    Counties

First Census of the United States, 1790.  T498
     Roll #2 - New York, North Carolina, and Pennsylvania
                     Note:  these are the printed schedules as published by the Bureau
                     of the Census in 1907-1908

Second Census of the United States, 1800.  M32
     Roll #35 - Adams, Allegheny, Armstrong, and Berks Counties
     Roll #41 - Lycoming, Montgomery, and Westmoreland Counties
     Roll #43 - City of Philadelphia, Somerset, and Venango Counties

Third Census of the United States, 1810.  M252
     Roll #44 - Adams, Allegheny, and Armstrong Counties
     Roll #51 - Huntingdon, Jefferson, McKean, Mifflin, Northampton, Tioga,
                       and Westmoreland Counties
     Roll #53 - Northumberland, Potter, Somerset, Venango, and Warren Counties

Fourth Census of the United States, 1820.  M33
     Roll #97 - Allegheny and Armstrong Counties
     Roll #105 - Indiana, Jefferson, Lebanon, and Luzerne Counties
     Roll #114 - Venango and York counties.  State recapituation.

Fifth Census of the United States, 1830.  M19
     Roll #145 - Bradford, Armstrong, and Luzerne Counties
     Roll #161 - Somerset, McKean, Potter, Jefferson, Cambria, and
                        Clearfield Counties
     Roll #164 - Venango and Westmoreland Counties

Sixth Census of the United States, 1840.  M704
     Roll #442 - Armstrong County
     Roll #464 - Jefferson and  Juniata Counties
     Roll #497 - Venango County

Seventh Census of the United States, 1850.  M 432
     Roll #749 - Armstrong County
     Roll #757 - Clarion County
     Roll #786 - Jefferson and Juniata Counties
     Roll #832 - Venango and Warren Counties

Eighth Census of the United States, 1860.  M653
     Roll #1069 - Armstrong County (part)
     Roll #1070 - Armstrong County (part)
     Roll #1095 - Clarion County
     Roll #1118 - Jefferson County
     Roll #1189 - Venango County

Ninth Census of the United States, 1870. M593
     Roll #1300 - Armstrong County (part)
     Roll #1301 - Armstrong County (part)
     Roll #1326 - Clarion County
     Roll #1344 - Forest County
     Roll #1352 - Jefferson County
     Roll #1459 - Venango County (part)
     Roll #1460 - Venango County (part)

Tenth Census of the United States, 1880.  T9
     Roll #1095 - City of Pittsburgh, wards 27 (part) and 28-36, and
                           Armstrong County (part)
     Roll #1096 - Armstrong County (part)
     Roll #1117 - Clearfield (part) and Clarion (part) Counties
     Roll #1118 - Clarion (part) and Columbia (part) Counties
     Roll #1131 - Forest and Franklin Counties
     Roll #1136 - Jefferson and Juniata (part) Counties
     Roll #1199 - Venango County

Special schedules of the Eleventh Census (1890) Enumerating Union Veterans and Widows of Union Veterans of the Civil War.  M123
     Roll #87 - Armstrong, Cambria, Clarion, Indiana, Jefferson, and
                      Westmoreland Counties
     Roll #89 - Butler, Crawford, Erie, Forest, Lawrence, Mercer, Venango and
                      Warren Counties

Twelfth Census of the United States, 1900. T623
     Roll #1372 - Armstrong County
     Roll #1373 - Armstrong County
     Roll #1394 - Chester (part) and Clarion (part) Counties
     Roll #1395 - Clarion (part) and  Clearfield (part) Counties
     Roll #1412 - Forest County
     Roll #1416 - Indiana (part) and Jefferson (part) Counties
     Roll #1417 - Jefferson (part) and Juniata Counties
     Roll #1490 - Venango County (part)

Thirteenth Census of the United States, 1910.  T624
     Roll #1309 - Armstrong County (part)
     Roll #1310 - Armstrong County (part)
     Roll #1329 - Clarion County (part)
     Roll #1330 - Clarion County (part)
     Roll #1347 - Forest County
     Roll #1423 - Venango County (part)
     Roll #1423 - Venango County (part)

Fourteenth Census of the United States, 1920. T625
     Roll #1508 - Armstrong County
     Roll #1551 - Chester and Clarion Counties
     Roll #1552 - Clarion and Clearfield Counties
     Roll #1571 - Forest County
     Roll #1575 - Jefferson County
     Roll #1656 - Venango County (part)
     Roll #1657 - Venango County (part)

Fifteen Census of the United States, 1930.  T626
      Roll #1993 - Armstrong County (part)
      Roll #1994 - Armstrong County (part)
      Roll #2016 - Clarion County (part)
      Roll #2017 - Clarion County (part)
      Roll #2042 - Forest County
      Roll #2047 - Jefferson County (part)
      Roll #2152 - Venango County (part)
      Roll #2153 - Venango County (part)

Note:  If you go to the National Archives and Records Administration site at http://1930census.archives.gov/stateSearch.asp
you can get a list of Enumeration Districts and Institutions for each of the above counties.
 

**Other census records from Pennsylvania and elsewhere throughout the United States may be ordered for $3.50 a roll.  Ask Staff for details about the National Archives Rental Program.