DT
Doris Thomas — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Madison-County, Iowa
Our Model Tree links this Doris Thomas across the 1930 and 1940 US Censuses in Madison-County, Iowa (XGBoost, ~Confirmed) — first a daughter (b.~1923), then head of a 8-person household.
Age 17
b. ~1923
Female
Daughter
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Madison-County, Iowa |
| Surname | Thomas |
| Given Name | Doris |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Grand River TWP. |
| 1935 Residence (County) | Madison |
| Additional Details | |
| Occupation | NP |
| Class of Worker | 0 |
| Hours Worked | 2 |
| Highest Grade | Hs 2 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Np |
| Township / Ward | Grand River Twp |
| Est. Birth Year | ~1923 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Doris | Age | Birth yr |
|---|---|---|---|---|
| Alice Thomas | Spouse | — | 45 | ~1895 |
| Lois Thomas | Daughter | — | 20 | ~1920 |
| Shirley Thomas | Daughter | — | 3 | ~1937 |
| Harry Thomas | Head | — | 48 | ~1892 |
| Doris Thomas | Daughter | — | 17 | ~1923 |
| J Mckeever | Other | — | 83 | ~1857 |
| Donald Thomas | Son | — | 18 | ~1922 |
| Arlene Thomas | Daughter | — | 13 | ~1927 |
Census Appearances
1930
Madison, Iowa
Daughter, age 7
Madison, Iowa · implied b. ~1923 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Doris F |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Madison-County, Iowa
Daughter, age 17
Madison-County, Iowa · implied b. ~1923 — 8 household members
| Surname | Thomas |
| Given Name | Doris |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Grand River TWP. |
| 1935 Residence (County) | Madison |
| Occupation | NP |
| Class of Worker | 0 |
| Hours Worked | 2 |
| Highest Grade | Hs 2 |
| 1935 Residence | Same place |
| 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 Doris Thomas across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Doris Thomas
Daughter · 1940 · age 17 · b. ~1923 · Iowa
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Sibling
Donald Thomas
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Shirley Thomas
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lois Thomas
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Arlene Thomas
Sibling · 1940 · age 13
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 — Madison-County, Iowa
Open full size
1940 US Federal Census — Madison-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01179-00637)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | L. R. Denney | 53 | Head | Farming | Iowa |
| 2 | Floy C. Denney | 46 | Wife | Housewife | Iowa |
| 3 | Bertha Denney | 83 | Mother-in-law | — | Ohio |
| 4 | Maggie B. Kivett | 77 | Head | — | Indiana |
| 5 | Ambie Kivett | 43 | Daughter | School Teacher | Iowa |
| 6 | Lee H. Kivett | 45 | Head | Farming | Iowa |
| 7 | George Spencer | 33 | Head | Farm Hand | Missouri |
| 8 | Ethel Spencer | 28 | Wife | — | Iowa |
| 9 | Harold Spencer | 7 | Son | — | Iowa |
| 10 | Joyce Spencer | 6 | Daughter | — | Iowa |
| 11 | Marlene Spencer | 3 | Daughter | 0 | Iowa |
| 12 | Charles Spencer | 1 | Son | 0 | Iowa |
| 13 | W. C. Wright | 52 | Head | Farming | Iowa |
| 14 | Maude Wright | 49 | Wife | — | Iowa |
| 15 | C. R. Hehren | 53 | Head | Farming | Iowa |
| 16 | Stella Hehren | 48 | Wife | — | Iowa |
| 17 | Ralph Hehren | 12 | Son | — | Iowa |
| 18 | C. C. Schutz | 67 | Head | Farming | Iowa |
| 19 | Bertha Schutz | 67 | Wife | — | Missouri |
| 20 | Calvin A. Schutz | 33 | Son | Farming | Iowa |
| 21 | Harry M. Thomas | 48 | Head | Leather Work | Iowa |
| 22 | Alice Thomas | 45 | Wife | — | Iowa |
| 23 | Lois Thomas | 20 | Daughter | House Keeper | Iowa |
| 24 | Donald Thomas | 18 | Son | Chauffeur | Iowa |
| 25 | Doris Thomas THIS PERSON | 17 | Daughter | Np | Iowa |
| 26 | Arlene Thomas | 13 | Daughter | — | Iowa |
| 27 | Shirley Thomas | 3 | Daughter | 0 | Iowa |
| 28 | J. B. Mckeever | 83 | Hired Hand | — | Iowa |
| 29 | Lee Palmer | 48 | Head | Farming | Iowa |
| 30 | Ethel Palmer | 46 | Wife | — | Iowa |
| 31 | Lois Palmer | 22 | Daughter | Rural Teacher | Iowa |
| 32 | Helen Palmer | 20 | Daughter | House Keeper | South Dakota |
| 33 | Donald Palmer | 18 | Son | Farming | South Dakota |
| 34 | Max Palmer | 13 | Son | — | Iowa |
| 35 | Richard Griswell | 60 | Head | Farming | Iowa |
| 36 | Effie Griswell | 51 | Wife | — | Iowa |
| 37 | Calender Mcfarland | 79 | Mother | — | Iowa |
| 38 | John Evans | 68 | Head | Farming | Iowa |
| 39 | Bertha M. Evans | 51 | Wife | — | Iowa |
| 40 | Charles E. Jessup | 77 | Father | — | Iowa |
Related Census Records
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)