TH
Thomas Hart — 1940 US Census Record
Model Tree available1940 United States Federal Census · Hardin-County, Iowa
Our Model Tree links this Thomas Hart across the 1920, 1930 and 1940 US Censuses in Hardin-County, Iowa (XGBoost, ~Confirmed), with identified parents Albert & Anna — first a son (b.~1914), then head of a 3-person household.
Age 26
b. ~1914
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Hardin-County, Iowa |
| Surname | Hart |
| Given Name | Thomas Charles |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Hardin |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farming |
| Class of Worker | OA |
| Hours Worked | 90 |
| Highest Grade | H 4 |
| 1935 Residence | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Farmer |
| Township / Ward | Union Township |
| Est. Birth Year | ~1914 |
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 Thomas | Age | Birth yr |
|---|---|---|---|---|
| Elmer Hart | Son | — | 32 | ~1908 |
| Thomas Hart | Son | — | 26 | ~1914 |
| Anna Hart | Head | — | 56 | ~1884 |
Census Appearances
1920
Marshall, Iowa
Son, age 5
Marshall, Iowa · implied b. ~1915 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hart |
| Given Name | Thomas |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Wyoming |
| Occupation | none |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Marshall, Iowa
Son, age 16
Marshall, Iowa · implied b. ~1914 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hart |
| Given Name | Thomas E |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Wyoming |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Hardin-County, Iowa
Son, age 26
Hardin-County, Iowa · implied b. ~1914 — 3 household members
| Surname | Hart |
| Given Name | Thomas Charles |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Hardin |
| Occupation | Farmer |
| Industry | Farming |
| Class of Worker | OA |
| Hours Worked | 90 |
| Highest Grade | H 4 |
| 1935 Residence | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
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 Thomas Hart across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Albert Hart (~0.92 confidence) and mother Anna Hart (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Albert Hart
b. ~1876
Source father
● Household
· direct · ~0.92
Mother
Anna Hart
b. ~1884
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Thomas Hart
Son · 1940 · age 26 · b. ~1914 · Iowa
★ You are viewing this record
Sibling
Elmer Hart
Sibling · 1940 · age 32
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Hardin-County, Iowa
Open full size
1940 US Federal Census — Hardin-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01165-00642)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Kenneth Bales | 16 | Son | Farm Laborer | Missouri |
| 42 | Bruce S. Hadley | 37 | Head | Farmer | Missouri |
| 43 | Katie Mae Hadley | 32 | Wife | — | Missouri |
| 44 | Joe Mansfield Hadley | 7 | Son | — | Iowa |
| 45 | Alice Harriet Hadley | 5 | Daughter | — | Iowa |
| 46 | Melinda Lee Hadley | 3 | Daughter | — | Iowa |
| 47 | Otto C. Beales | 22 | Lodger | Farm Laborer | Iowa |
| 48 | Anna R. Hart | 56 | Head | — | Wyoming |
| 49 | Elmer Albert Hart | 32 | Son | Farmer | Iowa |
| 50 | Thomas Charles Hart THIS PERSON | 26 | Son | Farmer | Iowa |
| 51 | John E. Hanson | 48 | Head | Farmer | Iowa |
| 52 | Goldie Sorensen | 27 | Maid | Maid | Denmark |
| 53 | Charles S. Brindle | 63 | Head | Farmer | Iowa |
| 54 | George Brindle | 24 | Son | Farmer | Iowa |
| 55 | Alice Brindle | 22 | Daughter | — | Iowa |
| 56 | Chester Brindle | 12 | Son | — | Iowa |
| 57 | William A. Matney | 39 | Head | Farm Laborer | Iowa |
| 58 | Lottie Irene Matney | 26 | Wife | — | Iowa |
| 59 | William Jr. Matney | 8 | Son | — | Iowa |
| 60 | Bonnie Lou Matney | 5 | Daughter | — | Iowa |
| 61 | John P. Kink | 46 | Head | Farmer | North Carolina |
| 62 | S. Elizabeth Kink | 42 | Wife | — | North Carolina |
| 63 | Jessie Pauline Kink | 19 | Daughter | — | Iowa |
| 64 | Dora Warrington | 68 | Head | — | Iowa |
| 65 | Merle Webb | 24 | Lodger | Farm Laborer | Missouri |
| 66 | Ernest Beecher | 79 | Head | — | Pennsylvania |
| 67 | Jennie M. Beecher | 63 | Wife | — | New York |
| 68 | Willford Dickenson | 31 | Lodger | Farm Laborer | Iowa |
| 69 | Dones Jasper | 42 | Head | Farmer | Iowa |
| 70 | Lulu M. Jasper | 36 | Wife | — | Iowa |
| 71 | Robert D. Jasper | 14 | Son | Farm Laborer | Iowa |
| 72 | Arlene M. Jasper | 11 | Daughter | — | Iowa |
| 73 | Glenn A. Jasper | 8 | Son | — | Iowa |
| 74 | Lillian M. Jasper | 4 | Daughter | — | Iowa |
| 75 | Paul E. Jasper | 2 | Son | — | Iowa |
| 76 | Ruth Jasper | 0 | Daughter | — | Iowa |
| 77 | Ray S. Rowen | 31 | Head | Bus Driver | Iowa |
| 78 | Naleta Rowen | 27 | Wife | — | Colorado |
| 79 | Judith Irene Rowen | 2 | Daughter | — | Iowa |
| 80 | Clair Cockerham | 24 | Head | Farmer | Iowa |
Pedigree Summary
Thomas + 1 sibling
Gen 1 · 2 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)