Head-of-Household name index only. Individual members of the household were not enumerated by name in 1840.
Although Clarion County formed in 1839, the 1840 U. S. Census did not include it. Rather, households were enumerated in the parent counties' (Armstrong and Venango) townships. Researchers must check the original documents instead of relying on data in a transcription. Also, the original records contain demographic data of the household's residents that is not included here.
| Surname | Given Name | County | Township | Page |
|---|---|---|---|---|
| George | Armstrong | Red Bank | 67 | |
| Reuben | Venango | Beaver | 69 | |
| Samuel | Armstrong | Red Bank | 67 | |
| Aaron | Conrod | Armstrong | Red Bank | 69 |
| Aaron | Daniel | Armstrong | Clarion | 87 |
| Aaron | George | Armstrong | Clarion | 87 |
| Aaron | Joseph | Armstrong | Clarion | 87 |
| Aaron | Thomas | Armstrong | Red Bank | 69 |
| Ace | William | Venango | Farmington | 29 |
| Ackerman | Jacob | Armstrong | Monroe | 57 |
| Acre | George | Venango | Beaver | 70 |
| Adams | Jacob | Armstrong | Red Bank | 72 |
| Adams | Samuel | Venango | Elk | 122 |
| Adams | Samuel | Armstrong | Red Bank | 72 |
| Adams | William | Venango | Richland | 61 |
| Agnew | James F | Venango | Richland | 56 |
| Agnew | John | Venango | Paint | 25 |
| Agy | Jonathan | Armstrong | Clarion | 79 |
| Albauch | George | Venango | Farmington | 33 |
| Albenger | Peter | Armstrong | Clarion | 79 |
| Albert | Charles | Venango | Beaver | 70 |
| Albert | Jacob E | Venango | Beaver | 70 |
| Albert | Samuel | Armstrong | Madison | 126 |
| Alcorn | George | Venango | Beaver | 70 |
| Alden | Hamilton | Venango | Beaver | 71 |
| Alebach | A H | Venango | Beaver | 65 |
| Alexander | Henry | Armstrong | Toby | 113 |
| Alexander | William | Venango | Farmington | 31 |
| Alexander | William T | Armstrong | Clarion | 80 |
| Algeo | John | Armstrong | Red Bank | 77 |
| Allebach | Henry | Venango | Richland | 55 |
| Allebach | Samuel | Venango | Richland | 56 |
| Allebauch | Fanny | Venango | Beaver | 67 |
| Allen | Horace | Venango | Beaver | 71 |
| Allen | Isaac C | Venango | Farmington | 29 |
| Alliot | Joseph | Armstrong | Perry | 106 |
| Allison | Henry | Armstrong | Clarion | 86 |
| Allison | John | Armstrong | Clarion | 89 |
| Allison | Robert | Armstrong | Clarion | 88 |
| Allison | Taite Jr | Armstrong | Clarion | 86 |
| Allshouse | Peter | Armstrong | Clarion | 89 |
| Allsworth | James | Armstrong | Perry | 111 |
| Alsbauch | Jacob | Venango | Beaver | 65 |
| Alsbaugh | William | Venango | Richland | 59 |
| Alt | Jacob | Venango | Beaver | 67 |
| Alt | Jacob S | Venango | Beaver | 68 |
| Alt | John | Venango | Farmington | 30 |
| Alt | Nicholas | Venango | Beaver | 69 |
| Alt | Nicholas Jr | Venango | Beaver | 69 |
| Altman | George | Venango | Beaver | 68 |
| Altman | John | Armstrong | Toby | 122 |
| Anchor | Andrew | Venango | Richland | 58 |
| Anderson | Abraham | Armstrong | Madison | 124 |
| Anderson | Adam | Armstrong | Red Bank | 61 |
| Anderson | Addy | Armstrong | Red Bank | 60 |
| Anderson | Francis | Armstrong | Toby | 113 |
| Anderson | James | Venango | Farmington | 30 |
| Anderson | James | Armstrong | Monroe | 54 |
| Anderson | Samuel B | Venango | Farmington | 32 |
| Anderson | Thomas | Venango | Farmington | 32 |
| Anderson | William | Armstrong | Clarion | 89 |
| Andrew | William | Venango | Paint | 26 |
| Anthony | Jacob | Armstrong | Red Bank | 65 |
| Anthony | James | Armstrong | Madison | 129 |
| Anthony | James | Armstrong | Red Bank | 72 |
| Anthony | John | Armstrong | Madison | 130 |
| Anthony | William | Armstrong | Madison | 129 |
| Anthony | William | Armstrong | Madison | 128 |
| Apple | Joseph | Armstrong | Red Bank | 66 |
| Ardery | John | Armstrong | Red Bank | 64 |
| Ardery | John Jr | Armstrong | Red Bank | 66 |
| Ardery | Robert | Armstrong | Red Bank | 64 |
| Armagart | Eli | Armstrong | Red Bank | 70 |
| Armagast | Stophel | Armstrong | Red Bank | 61 |
| Armagost | Jacob | Armstrong | Clarion | 79 |
| Armagost | Jacob | Armstrong | Clarion | 87 |
| Armagost | Peter | Armstrong | Clarion | 87 |
| Armitage | Ephraim | Armstrong | Toby | 113 |
| Armston | David | Armstrong | Toby | 118 |
| Armstong | John | Armstrong | Madison | 126 |
| Armstrong | Alexander | Armstrong | Toby | 114 |
| Armstrong | Joseph | Armstrong | Toby | 115 |
| Armstrong | Robert | Venango | Elk | 123 |
| Arnel | Geg | Armstrong | Madison | 129 |
| Arner | John | Armstrong | Madison | 126 |
| Arnold | Stephen | Venango | Richland | 61 |
| Arnold | William | Venango | Paint | 26 |
| Arthurs | John | Armstrong | Monroe | 56 |
| Asborne | James | Armstrong | Toby | 115 |
| Ashbaugh | Adam | Venango | Richland | 56 |
| Ashbaugh | Danie | Venango | Beaver | 67 |
| Ashbaugh | Daniel | Venango | Richland | 57 |
| Ashbaugh | Jacob | Venango | Richland | 56 |
| Ashbaugh | John | Armstrong | Red Bank | 61 |
| Ashbaugh | John | Venango | Richland | 59 |
| Ashbaugh | John | Venango | Richland | 56 |
| Ats | Jacob | Venango | Elk | 125 |
| Attleberger | Jacob | Venango | Beaver | 67 |
| Auchor | Snowden | Venango | Richland | 58 |
| Aungst | John | Venango | Richland | 60 |
| Aurandt | Samuel | Venango | Richland | 56 |
| Austin | Samuel | Armstrong | Toby | 118 |
| Austin | Samuel Jr | Armstrong | Toby | 118 |
| Averet | Joseph | Armstrong | Perry | 108 |
| Avery | John | Venango | Elk | 124 |
| Aylor | Thomas | Armstrong | Toby | 115 |
| Surname | Given Name | County | Township | Page |
|---|---|---|---|---|
| Bailey | George | Venango | Paint | 25 |
| Bailey | John | Armstrong | Monroe | 55 |
| Bailey | Thomas | Venango | Richland | 55 |
| Baily | Thomas | Armstrong | Clarion | 85 |
| Baker | Abraham | Venango | Richland | 59 |
| Baker | Daniel | Armstrong | Perry | 107 |
| Baker | David | Armstrong | Toby | 120 |
| Baker | Hugh | Venango | Elk | 123 |
| Baker | John | Armstrong | Perry | 107 |
| Baker | Samuel | Venango | Elk | 122 |
| Baker | William | Armstrong | Toby | 120 |
| Baldwin | William B | Armstrong | Red Bank | 68 |
| Balliatt | Nicholas | Armstrong | Clarion | 87 |
| Balliot | Nicholas | Armstrong | Monroe | 59 |
| Balliott | George | Armstrong | Red Bank | 61 |
| Balseger | Samuel | Armstrong | Madison | 128 |
| Bane | Charity | Armstrong | Madison | 129 |
| Barber | Robert | Armstrong | Clarion | 82 |
| Bargar | Abraham | Armstrong | Perry | 110 |
| Barger | Jacob | Armstrong | Perry | 110 |
| Barger | John | Armstrong | Perry | 109 |
| Barger | Philip Jr | Armstrong | Perry | 110 |
| Barges | Philip | Armstrong | Perry | 110 |
| Barges | Samuel | Armstrong | Perry | 110 |
| Barly | John | Armstrong | Red Bank | 77 |
| Barnet | Henry | Venango | Farmington | 31 |
| Barnett | James | Armstrong | Red Bank | 62 |
| Barr | Adam | Armstrong | Clarion | 86 |
| Barr | David | Armstrong | Madison | 124 |
| Barr | Henry Jr | Armstrong | Perry | 109 |
| Barr | Henry Sr | Armstrong | Perry | 109 |
| Barr | James | Armstrong | Monroe | 56 |
| Barr | Robert | Armstrong | Red Bank | 77 |
| Barr | Stephen | Venango | Farmington | 33 |
| Barr | Thomas | Armstrong | Clarion | 79 |
| Barr | William | Armstrong | Perry | 109 |
| Barrechanan | James | Armstrong | Madison | 125 |
| Bartholemew | William | Armstrong | Madison | 131 |
| Bartholomew | Michael | Armstrong | Red Bank | 77 |
| Bartlet | Jacob | Venango | Farmington | 33 |
| Bartlet | Peter | Venango | Farmington | 33 |
| Bartlet | Peter Jr | Venango | Farmington | 33 |
| Bartley | William | Armstrong | Perry | 110 |
| Bartlez | John | Armstrong | Toby | 114 |
| Basam | Abraham | Armstrong | Clarion | 85 |
| Bashline | George | Armstrong | Monroe | 54 |
| Baughman | Catharine | Armstrong | Red Bank | 70 |
| Baughman | Elizabeth | Armstrong | Red Bank | 72 |
| Baughman | John | Armstrong | Red Bank | 70 |
| Bawersock | Paul | Armstrong | Red Bank | 64 |
| Bayer | George | Armstrong | Red Bank | 70 |
| Bazzard | John | Armstrong | Madison | 125 |
| Beale | Daniel | Armstrong | Monroe | 55 |
| Beals | Daniel | Venango | Richland | 60 |
| Beals | Jacob | Venango | Richland | 60 |
| Bean | Jacob | Venango | Beaver | 68 |
| Bean | Jesse P | Venango | Elk | 122 |
| Beaty | Elisha H | Armstrong | Perry | 111 |
| Beaty | William | Armstrong | Perry | 111 |
| Beatty | John | Armstrong | Clarion | 81 |
| Beatty | Richard | Armstrong | Red Bank | 65 |
| Beatty | William | Armstrong | Monroe | 57 |
| Bechel | John | Armstrong | Clarion | 90 |
| Beck | Adam | Armstrong | Red Bank | 73 |
| Beck | Alexander | Armstrong | Toby | 115 |
| Beck | George | Venango | Beaver | 67 |
| Beck | George | Armstrong | Red Bank | 73 |
| Beck | Isaac | Armstrong | Red Bank | 73 |
| Beck | John | Armstrong | Toby | 120 |
| Beck | John | Venango | Elk | 123 |
| Bectel | Isaac | Venango | Richland | 60 |
| Been | George L | Armstrong | Toby | 118 |
| Beer | John | Armstrong | Red Bank | 69 |
| Beer | William | Venango | Paint | 27 |
| Beery | Abraham | Venango | Richland | 60 |
| Beery | Henry | Venango | Richland | 55 |
| Beighly | Henry | Armstrong | Clarion | 88 |
| Beighly | John | Armstrong | Monroe | 58 |
| Bekan | John | Armstrong | Red Bank | 72 |
| Bell | Alexander | Venango | Elk | 122 |
| Bell | George | Venango | Richland | 62 |
| Bell | John B | Venango | Richland | 61 |
| Bell | Nancy | Venango | Beaver | 66 |
| Bell | Samuel | Venango | Beaver | 66 |
| Bell | Thomas | Venango | Beaver | 66 |
| Bell | William | Venango | Farmington | 33 |
| Bender | Frederick | Venango | Beaver | 67 |
| Beninger | Samuel | Armstrong | Madison |