| 1840 FERGUSON Index | ||||
| Last | First | Census | Location | Census |
| Name | Name | State | (County; Town) | Year |
| Fergeson | Hugh | PA | Adams; Liberty | 1840 |
| Fergeson | John | PA | Adams; Liberty | 1840 |
| Fergason | Samuel | PA | Adams; Liberty | 1840 |
| Ferguson | William | PA | Allegheny; Findley | 1840 |
| Ferguson | David | PA | Allegheny; Pine | 1840 |
| Ferguson | John | PA | Allegheny; Pine | 1840 |
| Ferguson | Robt | PA | Allegheny; Pine | 1840 |
| Furgison | Elizabeth | PA | Allegheny; Pittsburgh East Ward | 1840 |
| Furgason | Saml | PA | Allegheny; Pittsburgh East Ward | 1840 |
| Furgison | Abigant | PA | Allegheny; Pittsburgh North Ward | 1840 |
| Fergeson | Mosses | PA | Allegheny; Pittsburgh South Ward | 1840 |
| Furgison | Alexr | PA | Allegheny; Pittsburgh West Ward | 1840 |
| Ferguson | Arthur | PA | Allegheny; Wilkins | 1840 |
| Ferguson | Samuel | PA | Allegheny; Wilkins | 1840 |
| Ferguson | Saml | PA | Armstrong; Buffalo | 1840 |
| Ferguson | William | PA | Armstrong; Clarion | 1840 |
| Ferguson | Hance | PA | Armstrong; Red Bank | 1840 |
| Ferguson | William | PA | Beaver; Green | 1840 |
| Furgison | Henry | PA | Beaver; Hanover | 1840 |
| Furgeson | John | PA | Beaver; Hopewell | 1840 |
| Furgeson | James | PA | Beaver; New Sewickley | 1840 |
| Furgeson | Robert | PA | Beaver; New Sewickley | 1840 |
| Ferguson | Thomas | PA | Beaver; North Beaver | 1840 |
| Furgoson | John | PA | Beaver; North Sewickley | 1840 |
| Furgason | Joseph | PA | Bedford; Bedford | 1840 |
| Furgeson | John | PA | Bedford; Greenfield | 1840 |
| Furgeson | Saml | PA | Bedford; Greenfield | 1840 |
| Furgeson | James | PA | Bedford; South Woodbury | 1840 |
| Furgeson | William | PA | Bedford; South Woodbury | 1840 |
| Furgeson | William | PA | Bedford; West Providence | 1840 |
| Forgoson | Wm | PA | Berks; Reading South Ward | 1840 |
| Ferguson | George | PA | Bradford; Canton | 1840 |
| Ferguson | John | PA | Bradford; Granville | 1840 |
| Furguson | Arnold | PA | Bradford; Sheshequin | 1840 |
| Furgeson | Curtis D | PA | Bradford; Sheshequin | 1840 |
| Furguson | Alfred | PA | Bradford; Wells | 1840 |
| Furguson | Chas H | PA | Bradford; Wells | 1840 |
| Forgeson | Thos | PA | Bradford; Wells | 1840 |
| Ferguson | Ebenezer | PA | Bradford; Wysox | 1840 |
| Furgison | ?? | PA | Bucks; Doylestown | 1840 |
| Forguson | Wm | PA | Butler; Centre | 1840 |
| Ferguson | Enoch | PA | Chester; Londonderry | 1840 |
| Furgeson | Enock | PA | Chester; New London | 1840 |
| Furguson | Isaac | PA | Chester; Tredyffrin | 1840 |
| Forguson | Hugh | PA | Chester; West Bradford | 1840 |
| Furgason | William | PA | Chester; West Caln | 1840 |
| Ferguson | Hugh T | PA | Chester; West Nottingham | 1840 |
| Ferguson | Washington | PA | Chester; West Nottingham | 1840 |
| Ferguson | David | PA | Clearfield; Ferguson | 1840 |
| Ferguson | John | PA | Clearfield; Ferguson | 1840 |
| Ferguson | James | PA | Clearfield; Penn | 1840 |
| Ferguson | Wm | PA | Clearfield; Penn | 1840 |
| Ferguson | Andrew | PA | Clinton; Pine Creek | 1840 |
| Ferguson | Wm | PA | Clinton; Wayne | 1840 |
| Ferguson | Matthew | PA | Columbia; Greenwood | 1840 |
| Ferguson | Mary | PA | Crawford; Fallowfield | 1840 |
| Ferguson | Henry | PA | Crawford; no twp listed | 1840 |
| Ferguson | James | PA | Crawford; no twp listed | 1840 |
| Ferguson | Jas A | PA | Crawford; Vernon | 1840 |
| Ferguson | Mary Ann | PA | Cumberland; Carlisle | 1840 |
| Ferguson | David | PA | Cumberland; Dickinson | 1840 |
| Ferguson | John | PA | Cumberland; Hopewell | 1840 |
| Ferguson | David | PA | Cumberland; Mifflin | 1840 |
| Ferguson | Wm | PA | Cumberland; Mifflin | 1840 |
| Ferguson | Elizabeth | PA | Cumberland; West Pennsboro | 1840 |
| Ferguson | Elizabeth | PA | Cumberland; West Pennsboro | 1840 |
| Ferguson | Wm | PA | Cumberland; West Pennsboro | 1840 |
| Ferguson | Benjn | PA | Dauphin; Halifax | 1840 |
| Furgison | David | PA | Dauphin; Hanover | 1840 |
| Ferguson | Robert | PA | Delaware; Aston | 1840 |
| Farguson | Elizabeth | PA | Delaware; Middletown | 1840 |
| Furguson | James | PA | Delaware; Middletown | 1840 |
| Furguson | James | PA | Delaware; Upper Darby | 1840 |
| Furgerson | John A | PA | Erie; Beaverdam | 1840 |
| Ferguson | John | PA | Erie; Fairview | 1840 |
| Ferguson | Israel | PA | Erie; Girard | 1840 |
| Ferguson | John | PA | Erie; Girard | 1840 |
| Ferguson | Cornelia | PA | Erie; North East | 1840 |
| Ferguson | Molly H | PA | Erie; North East | 1840 |
| Ferguson | Hance | PA | Erie; Springfield | 1840 |
| Furguson | James | PA | Erie; Springfield | 1840 |
| Ferguson | John | PA | Erie; Springfield | 1840 |
| Ferguson | William | PA | Erie; Springfield | 1840 |
| Furguson | David | PA | Franklin; Fannett | 1840 |
| Furguson | James | PA | Franklin; Fannett | 1840 |
| Forguson | Saml | PA | Franklin; Letterkenny | 1840 |
| Furguson | Wm | PA | Franklin; Quincy | 1840 |
| Ferguson | Henry | PA | Franklin; Washington | 1840 |
| Furguson | Andw | PA | Greene; Aleppo | 1840 |
| Furguson | James | PA | Greene; Aleppo | 1840 |
| Forguson | John | PA | Greene; Aleppo | 1840 |
| Forguson | Samuel | PA | Greene; Center | 1840 |
| Ferguson | William | PA | Greene; Morgan | 1840 |
| Furgeson | Hugh | PA | Huntingdon; Hollidaysburg | 1840 |
| Furgason | James | PA | Huntingdon; Hollidaysburg | 1840 |
| Ferguson | J | PA | Huntingdon; Tyrone | 1840 |
| Ferguson | John | PA | Huntingdon; Warriors Mark | 1840 |
| Ferguson | Bernard | PA | Indiana; Black Lick | 1840 |
| Ferguson | David | PA | Indiana; Black Lick | 1840 |
| Ferguson | Elliott | PA | Indiana; Black Lick | 1840 |
| Ferguson | James | PA | Indiana; Black Lick | 1840 |
| Ferguson | Jno | PA | Indiana; Centre | 1840 |
| Ferguson | Jno | PA | Indiana; Centre | 1840 |
| Ferguson | Saml | PA | Indiana; Centre | 1840 |
| Ferguson | James | PA | Indiana; Indiana | 1840 |
| Ferguson | Saml | PA | Indiana; Saltsburgh | 1840 |
| Furguson | Abeneazer | PA | Jefferson; Porter | 1840 |
| Furguson | John C | PA | Jefferson; Porter | 1840 |
| Ferguson | William | PA | Jefferson; Porter | 1840 |
| Furguson | William | PA | Jefferson; Porter | 1840 |
| Ferguson | James | PA | Jefferson; Rose | 1840 |
| Ferguson | Agnes | PA | Juniata; Walker | 1840 |
| Ferguson | Margaret | PA | Juniata; Walker | 1840 |
| Fergusson | Abraham | PA | Lancaster; Colerain | 1840 |
| Forgusson | John | PA | Lancaster; Colerain | 1840 |
| Ferguson | John | PA | Lancaster; Colerain | 1840 |
| Furgusson | Williann | PA | Lancaster; Colerain | 1840 |
| Furgerson | Wm | PA | Lancaster; Colerain | 1840 |
| Ferguson | John | PA | Lancaster; Columbia | 1840 |
| Ferguson | ?? | PA | Lancaster; East Donegal | 1840 |
| Forguson | Robert | PA | Lancaster; Martick | 1840 |
| Forguson | John | PA | Lancaster; no twp listed | 1840 |
| Ferguson | Abraham | PA | Lancaster; West Hempfield | 1840 |
| Ferguson | James | PA | Lancaster; West Hempfield | 1840 |
| Ferguson | Jane | PA | Lancaster; West Hempfield | 1840 |
| Ferguson | John | PA | Lancaster; West Hempfield | 1840 |
| Ferguson | Robert | PA | Lancaster; West Hempfield | 1840 |
| Ferguson | Robert | PA | Lancaster; West Hempfield | 1840 |
| Forguson | Alexr | PA | Luzerne; Dallas | 1840 |
| Furgason | James | PA | Luzerne; Hanover | 1840 |
| Forguson | Aaron | PA | Luzerne; Northmoreland | 1840 |
| Forguson | Abram | PA | Luzerne; Northmoreland | 1840 |
| Forguson | Henry | PA | Luzerne; Northmoreland | 1840 |
| Forguson | John | PA | Luzerne; Northmoreland | 1840 |
| Forguson | Joseph | PA | Luzerne; Northmoreland | 1840 |
| Forguson | Margaret | PA | Luzerne; Northmoreland | 1840 |
| Forguson | Richd | PA | Luzerne; Northmoreland | 1840 |
| Furgason | Susannah | PA | Luzerne; Providence | 1840 |
| Furgason | Mary | PA | Lycoming; Jersey Shore | 1840 |
| Furguson | John | PA | Lycoming; Lewis | 1840 |
| Ferguson | R M | PA | Mercer; Cool Spring | 1840 |
| Furgison | Mathew | PA | Mercer; Delaware | 1840 |
| Furgison | Mathew | PA | Mercer; Delaware | 1840 |
| Furgison | Andrew | PA | Mercer; Hickory | 1840 |
| Furgison | Elijah | PA | Mercer; Hickory | 1840 |
| Furgison | Jams | PA | Mercer; Hickory | 1840 |
| Furgison | John | PA | Mercer; Hickory | 1840 |
| Furgison | John | PA | Mercer; Hickory | 1840 |
| Furgison | Robt | PA | Mercer; Hickory | 1840 |
| Furgison | Saml | PA | Mercer; Hickory | 1840 |
| Furgison | Hance | PA | Mercer; Pymatuning | 1840 |
| Furgison | Janes | PA | Mercer; Pymatuning | 1840 |
| Furgison | Thomas | PA | Mercer; Pymatuning | 1840 |
| Ferguson | William | PA | Mercer; Sandy Creek | 1840 |
| Ferguson | Edward | PA | Mercer; Sandy Lake | 1840 |
| Ferguson | John | PA | Mercer; Sandy Lake | 1840 |
| Ferguson | Thomas | PA | Mercer; Sandy Lake | 1840 |
| Furgison | James | PA | Mercer; West Salem | 1840 |
| Furgison | John | PA | Mercer; West Salem | 1840 |
| Furgison | John | PA | Mercer; West Salem | 1840 |
| Furgason | George | PA | Mifflin; Armagh | 1840 |
| Furgason | John | PA | Mifflin; Armagh | 1840 |
| Forguson | Carlisle | PA | Mifflin; Oliver | 1840 |
| Furguson | Christina | PA | Mifflin; Wayne | 1840 |
| Furguson | Mathias | PA | Northampton; Easton Bushkill Ward | 1840 |
| Ferguson | James | PA | Perry; Landisburg | 1840 |
| Ferguson | William | PA | Perry; no twp listed | 1840 |
| Ferguson | Andrew | PA | Perry; Saville | 1840 |
| Ferguson | Mary | PA | Perry; Saville | 1840 |
| Ferguson | Mary | PA | Philadelphia; Blockley | 1840 |
| Ferguson | Isaac | PA | Philadelphia; Frankford | 1840 |
| Furgerson | James | PA | Philadelphia; Kensington Ward 4 | 1840 |
| Furguson | Benjamin | PA | Philadelphia; Kensington Ward 5 | 1840 |
| Furguson | John | PA | Philadelphia; Kensington Ward 5 | 1840 |
| Ferguson | Alexander | PA | Philadelphia; Moyamensing | 1840 |
| Ferguson | Henry | PA | Philadelphia; Moyamensing | 1840 |
| Ferguson | James | PA | Philadelphia; Moyamensing | 1840 |
| Ferguson | John | PA | Philadelphia; Moyamensing | 1840 |
| Ferguson | Malcom | PA | Philadelphia; Moyamensing | 1840 |
| Ferguson | Wm J | PA | Philadelphia; Moyamensing | 1840 |
| Furguson | David | PA | Philadelphia; North & South Penn | 1840 |
| Furgerson | Jno | PA | Philadelphia; Northern Liberties Ward 6 | 1840 |
| Ferguson | Benjn | PA | Philadelphia; Northern Liberties Ward 7 | 1840 |
| Ferguson | Robt | PA | Philadelphia; Northern Liberties Ward 7 | 1840 |
| Ferguson | Nathan | PA | Philadelphia; Philadelphia Cedar Ward | 1840 |
| Ferguson | Alex | PA | Philadelphia; Philadelphia Middle Ward | 1840 |
| Ferguson | John P | PA | Philadelphia; Philadelphia North Mulberry Ward | 1840 |
| Fergeson | Ann | PA | Philadelphia; Philadelphia North Ward | 1840 |
| Ferguson | James | PA | Philadelphia; Philadelphia Pine Ward | 1840 |
| Ferguson | Alexr s | PA | Philadelphia; Philadelphia South Mulberry Ward | 1840 |
| Ferguson | A | PA | Philadelphia; Philadelphia South Ward | 1840 |
| Ferguson | Caroline | PA | Philadelphia; Philadelphia South Ward | 1840 |
| Ferguson | Ebenr | PA | Philadelphia; Philadelphia Upper Delaware Ward | 1840 |
| Ferguson | John L | PA | Philadelphia; Southwark Ward 1 | 1840 |
| Furgason | James | PA | Philadelphia; Southwark Ward 2 | 1840 |
| Furgason | James | PA | Philadelphia; Southwark Ward 2 | 1840 |
| Ferguson | Jas | PA | Philadelphia; Spring Garden Ward 2 | 1840 |
| Furgeson | Heny | PA | Philadelphia; Spring Garden Ward 3 | 1840 |
| Furgeson | John A | PA | Philadelphia; Spring Garden Ward 3 | 1840 |
| Ferguson | Robert | PA | Philadelphia; Spring Garden Ward 4 | 1840 |
| Furguson | Edward | PA | Pike; Delaware | 1840 |
| Furguson | James | PA | Pike; Delaware | 1840 |
| Furgeson | Jno | PA | Schuylkill; Norwegian | 1840 |
| Ferguson | Thos | PA | Washington; Cecil | 1840 |
| Farguson | Thomas | PA | Washington; Chartiers | 1840 |
| Fergeson | Hugh | PA | Washington; Hanover | 1840 |
| Fergeson | John | PA | Washington; Hanover | 1840 |
| Ferguson | Wm | PA | Washington; Hanover | 1840 |
| Furgerson | Henry | PA | Washington; Morris | 1840 |
| Furgerson | Robert | PA | Washington; Morris | 1840 |
| Ferguson | Keleb | PA | Washington; North Strabane | 1840 |
| Ferguson | Hugh | PA | Washington; Smith | 1840 |
| Ferguson | Jno | PA | Washington; Smith | 1840 |
| Ferguson | Robt | PA | Washington; Somerset | 1840 |
| Furguson | William | PA | Wayne; Canaan | 1840 |
| Ferguson | Thomas | PA | Wayne; Sterling | 1840 |
| Furguson | Silas | PA | Wayne; Texas | 1840 |
| Ferguson | James | PA | Westmoreland; Franklin | 1840 |
| Ferguson | Saml | PA | Westmoreland; Franklin | 1840 |
| Ferguson | Samuel | PA | Westmoreland; Loyalhannah | 1840 |
| Furgeson | William | PA | Westmoreland; Loyalhannah | 1840 |
| Ferguson | Reuben | PA | Westmoreland; no twp listed | 1840 |
| Ferguson | Thomas | PA | Westmoreland; no twp listed | 1840 |
| Ferguson | William | PA | Westmoreland; no twp listed | 1840 |