HT
Herbert Thomas — 1940 US Census Record
Model Tree available1940 United States Federal Census · Stanley-County, South Dakota
Our Model Tree links this Herbert Thomas across the 1910, 1920, 1930 and 1940 US Censuses in Stanley-County, South Dakota (XGBoost, ~Confirmed), with identified parents George & James — first a head (b.~1892), then head of a 5-person household.
Age 48
b. ~1892
Male
Head
Born: South Dakota
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Stanley-County, South Dakota |
| Surname | Thomas |
| Given Name | Herbert R |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 48 |
| Marital Status | Married |
| Birthplace | South Dakota |
| 1935 Residence (City) | T-8, R-29 E |
| 1935 Residence (County) | Stanley |
| Additional Details | |
| Occupation | Rancher |
| Industry | Horses & Cattle |
| Class of Worker | OA |
| Hours Worked | 40 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
| Occupation | Rancher |
| Township / Ward | T8 R29 E |
| Est. Birth Year | ~1892 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Herbert | Age | Birth yr |
|---|---|---|---|---|
| Herbert Thomas | Head | — | 48 | ~1892 |
| Harriet Thomas | Spouse | — | 31 | ~1909 |
| Julia Thomas | Other | — | 73 | ~1867 |
| Walter Lounsbury | Other | — | 65 | ~1875 |
| Herbert Thomas | Son | — | 3 | ~1937 |
Census Appearances
1910
Stanley, South …
Son, age 18
Stanley, South Dakota · implied b. ~1892 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Herbert R |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | South Dakota |
| Father's Birthplace | Vermont |
| Mother's Birthplace | Connecticut |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
1920
Stanley, South …
Son, age 27
Stanley, South Dakota · implied b. ~1893 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Herbert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | South Dakota |
| Father's Birthplace | Vermont |
| Mother's Birthplace | Connecticut |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
1930
Stanley, South …
Other, age 38
Stanley, South Dakota · implied b. ~1892 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Herbert R. |
| Relationship to Head | R |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Single |
| Birthplace | South Dakota |
| Father's Birthplace | Vermont |
| Mother's Birthplace | Connecticut |
| Occupation | Farming |
| Industry | General |
| Can Read/Write | Yes |
| Radio Set | No |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
1940
Stanley-County, South …
Head, age 48
Stanley-County, South Dakota · implied b. ~1892 — 5 household members
| Surname | Thomas |
| Given Name | Herbert R |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 48 |
| Marital Status | Married |
| Birthplace | South Dakota |
| 1935 Residence (City) | T-8, R-29 E |
| 1935 Residence (County) | Stanley |
| Occupation | Rancher |
| Industry | Horses & Cattle |
| Class of Worker | OA |
| Hours Worked | 40 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
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 Herbert Thomas across 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father George Thomas (~0.92 confidence) and father James Thomas (~0.92 confidence) and mother Julia Thomas (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
George Thomas
b. ~1859
Source father
● Household
· direct · ~0.92
Father
James Thomas
b. ~1859
Source father
● Household
· direct · ~0.92
Mother
Julia Thomas
b. ~1867
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Herbert Thomas
Head · 1940 · age 48 · b. ~1892 · South Dakota
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Stanley-County, South Dakota
Open full size
1940 US Federal Census — Stanley-County, South Dakota
Page Contents
20 people indexed on this census page (nara:1940:m-t0627-03867-00947)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | George F Graham | 56 | Head | Rancher | Illinois |
| 2 | William Graham | 56 | Son | Rancher | Missouri |
| 3 | Lulu C Graham | 50 | Daughter | Housewife | Missouri |
| 4 | Everett B Graham | 52 | Son | Rancher | Missouri |
| 5 | William G Sterling | 24 | Head | Rancher | South Dakota |
| 6 | Pearl Sterling | 21 | Wife | Housewife | South Dakota |
| 7 | James Lee Sterling | None | Son | — | South Dakota |
| 8 | Herbert R Thomas THIS PERSON | 48 | Head | Rancher | South Dakota |
| 9 | Harriet W Thomas | 31 | Wife | Housewife | South Dakota |
| 10 | Herbert W Thomas | 3 | Son | — | South Dakota |
| 11 | Julia L Thomas | 73 | Mother | Housewife | Connecticut |
| 12 | Walter E Lounsbury | 65 | Uncle | Ranching | New York |
| 13 | Donald A Sweetland | 63 | Head | Common Labor | New York |
| 14 | Samuel E Ramsey | 38 | Head | Rancher | Indiana |
| 15 | Nona E Ramsey | 32 | Wife | Housewife | Missouri |
| 16 | Regina Elaine Ramsey | 12 | Daughter | — | South Dakota |
| 17 | Donald E Ramsey | 8 | Son | — | South Dakota |
| 18 | David S Ramsey | 4 | Son | — | South Dakota |
| 19 | Daniel A Ramsey | 3 | Son | — | South Dakota |
| 20 | Mary Etta Ramsey | 1 | Daughter | — | South Dakota |
Pedigree Summary
Herbert
Gen 1 · 3 parents
~0.92
Max depth 4 (1900–1950 window)
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)