IT
Isaac Thompson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Jefferson-County, Kentucky
Our Model Tree links this Isaac Thompson across the 1920, 1930 and 1940 US Censuses in Jefferson-County, Kentucky (XGBoost, ~Confirmed) — first a head (b.~1878), then head of a 3-person household.
Age 62
b. ~1878
Male
Head
Born: Kentucky
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Jefferson-County, Kentucky |
| Surname | Thompson |
| Given Name | Isaac |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 62 |
| Marital Status | Married |
| Birthplace | Kentucky |
| 1935 Residence (City) | Jefferson |
| Additional Details | |
| Highest Grade | No 1 |
| 1935 Residence | 40 |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
| Township / Ward | Magisterial District No 3 |
| Est. Birth Year | ~1878 |
Household Members
Census records only state relationship to the household head.
Pairwise kinship is derived (~90–95% accurate), not recorded.
Step/blended families and boarders can break it.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Isaac | Age | Birth yr |
|---|---|---|---|---|
| Isaac Thompson | Head | — | 62 | ~1878 |
| Wilmore Thompson | Son | — | 10 | ~1930 |
| Nellie Thompson | Spouse | — | 50 | ~1890 |
Census Appearances
1920
Jefferson, Kentucky
Head, age 42
Jefferson, Kentucky · implied b. ~1878 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thompson |
| Given Name | Isaac |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Kentucky |
| Father's Birthplace | United States |
| Mother's Birthplace | Kentucky |
| Occupation | laborer |
| Industry | Grain Elevator |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1930
Jefferson, Kentucky
Head, age 52
Jefferson, Kentucky · implied b. ~1878 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thompson |
| Given Name | Isaac |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Kentucky |
| Age at First Marriage | 30 |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Occupation | Janitor |
| Industry | Bank Building |
| Class of Worker | W |
| Can Read/Write | No |
| Home Owned/Rented | R |
| Home Value / Rent | 20 |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1940
Jefferson-County, Kentucky
Head, age 62
Jefferson-County, Kentucky · implied b. ~1878 — 3 household members
| Surname | Thompson |
| Given Name | Isaac |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 62 |
| Marital Status | Married |
| Birthplace | Kentucky |
| 1935 Residence (City) | Jefferson |
| Highest Grade | No 1 |
| 1935 Residence | 40 |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
Model Tree
An inferred pedigree reconstructed from census links — up to 4 generations within the 1900–1950 window. Closer generations are built from household co-residence; deeper ones are bridged by following a relative to their own childhood census. Confidence compounds and weakens with each generation.
Our Model Tree links Isaac Thompson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Isaac Thompson
Head · 1940 · age 62 · b. ~1878 · Kentucky
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Jefferson-County, Kentucky
Open full size
1940 US Federal Census — Jefferson-County, Kentucky
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01321-00261)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Alene Miller | 7 | Daughter | — | Kentucky |
| 2 | Jean Miller | 5 | Daughter | — | Kentucky |
| 3 | Jeanette Miller | 5 | Daughter | — | Kentucky |
| 4 | Netta Green | 39 | Head | Private Home | Tennessee |
| 5 | Nathaniel Green | 26 | Son | Lumber Mill | Kentucky |
| 6 | Isaac Thompson THIS PERSON | 62 | Head | — | Kentucky |
| 7 | Nellie Thompson | 50 | Wife | — | Kentucky |
| 8 | Wilmore Thompson | 10 | Son | — | West Virginia |
| 9 | George Russell | 51 | Head | Farm | Kentucky |
| 10 | Rosa Russell | 42 | Wife | — | Kentucky |
| 11 | Louise Russell | 18 | Daughter | — | Kentucky |
| 12 | Mattie L. Russell | 17 | Daughter | — | Kentucky |
| 13 | Ozetta Russell | 13 | Daughter | — | Kentucky |
| 14 | George Jr. Russell | 11 | Son | — | Kentucky |
| 15 | Sarah E. Russell | 9 | Daughter | — | Kentucky |
| 16 | Charles H. Russell | 7 | Son | — | Kentucky |
| 17 | Betty Jean Russell | 5 | Daughter | — | Kentucky |
| 18 | Virgil Lee Russell | 2 | Son | — | Kentucky |
| 19 | James Marvin Russell | 7 | Grandson | — | Kentucky |
| 20 | Earl Thomas | 48 | Head | Farm | Kentucky |
| 21 | Bertha Thomas | 48 | Wife | — | Kentucky |
| 22 | William Thomas | 19 | Son | Retail Grocery Store | Kentucky |
| 23 | Eugene Thomas | 12 | Son | — | Kentucky |
| 24 | Deloris Miller | 10 | Neice | — | Kentucky |
| 25 | Bernard Miller | 9 | Nephew | — | Kentucky |
| 26 | Joe Jewell | 40 | Head | Farm | Kentucky |
| 27 | Berrill Jewell | 30 | Wife | — | Kentucky |
| 28 | Joseph Jewell | 13 | Son | — | Kentucky |
| 29 | William E. Jewell | 11 | Son | — | Kentucky |
| 30 | Jerall Jewell | 2 | Son | — | Kentucky |
| 31 | William Brian | 48 | Head | Flour Mill | Kentucky |
| 32 | Pearl Brian | 48 | Wife | — | Kentucky |
| 33 | George Fishback | 59 | Head | Farm | Kentucky |
| 34 | Essie Fishback | 56 | Wife | — | Kentucky |
| 35 | Albert H. Tobbbe | 45 | Head | Plumbing Manufacture | Kentucky |
| 36 | Evelyn Tobbbe | 36 | Wife | — | Kentucky |
| 37 | Albert Lee Tobbbe | 9 | Son | — | Kentucky |
| 38 | Roy Christman | 19 | Stepson | — | Kentucky |
| 39 | Margaret Christman | 17 | Stepdaughter | — | Kentucky |
| 40 | John Harvey | 47 | Head | — | Mississippi |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1940 United States Federal Census (NARA). Our Model Tree links this person across census decades using XGBoost-based record linkage, with per-link confidence scores. Household corroboration strengthens the signal when co-residents appear on the same census pages in multiple years.
Source: National Archives and Records Administration (NARA)