| 1840 FERGUSON Index | ||||
| Last | First | Census | Location | Census |
| Name | Name | State | (County; Town) | Year |
| Furgerson | Wm | MA | Berkshire; Adams | 1840 |
| Furguson | William | MA | Berkshire; Dalton | 1840 |
| Furguson | Polly | MA | Berkshire; Sheffield | 1840 |
| Ferguson | Jireh | MA | Bristol; New Bedford | 1840 |
| Ferguson | James | MA | Bristol; Taunton 2 | 1840 |
| Ferguson | Robert | MA | Bristol; Taunton 2 | 1840 |
| Ferguson | John | MA | Dukes; Chilmark | 1840 |
| Ferguson | William | MA | Dukes; Chilmark | 1840 |
| Ferguson | William | MA | Dukes; Tisbury | 1840 |
| Ferguson | Wm | MA | Essex; Beverly | 1840 |
| Furgerson | Daniel | MA | Essex; Haverhill | 1840 |
| Furgerson | William | MA | Essex; Haverhill | 1840 |
| Ferguson | Stephen | MA | Essex; Manchester | 1840 |
| Furguson | James | MA | Essex; Newbury | 1840 |
| Ferguson | S | MA | Essex; Salem Ward 3 | 1840 |
| Ferguson | T B | MA | Essex; Salem Ward 3 | 1840 |
| Ferguson | Jane | MA | Essex; Salem Ward 4 | 1840 |
| Ferguson | Sam | MA | Essex; Salem Ward 4 | 1840 |
| Furguson | Thomas | MA | Essex; Topsfield | 1840 |
| Ferguson | John | MA | Franklin; Whately | 1840 |
| Furguson | John | MA | Hampshire; Cummington | 1840 |
| Ferguson | Wm | MA | Middlesex; Charlestown | 1840 |
| Furguson | Jas | MA | Middlesex; Lincoln | 1840 |
| Furgerson | David | MA | Middlesex; Lowell | 1840 |
| Furgerson | Francis | MA | Nantucket; Nantucket | 1840 |
| Furgerson | George | MA | Nantucket; Nantucket | 1840 |
| Fergerson | Wm | MA | Plymouth; Scituate | 1840 |
| Ferguson | Hiram | MA | Suffolk; Boston Ward 1 | 1840 |
| Furguson | John | MA | Suffolk; Boston Ward 1 | 1840 |
| Fergerson | James | MA | Suffolk; Boston Ward 11 | 1840 |
| Ferguson | Lucy Ann | MA | Suffolk; Boston Ward 3 | 1840 |
| Ferguson | Rebecca | MA | Suffolk; Boston Ward 3 | 1840 |
| Fergason | Rebecca A | MA | Suffolk; Boston Ward 5 | 1840 |
| Furgerson | Moses | MA | Suffolk; Boston Ward 6 | 1840 |