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Thomas Anderson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Hamilton-County, Iowa
Our Model Tree links this Thomas Anderson across the 1920, 1930 and 1940 US Censuses in Hamilton-County, Iowa (XGBoost, ~Confirmed), with identified parents Lars & Loek — first a head (b.~1907), then head of a 3-person household.
Age 33
b. ~1907
Male
Head
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Hamilton-County, Iowa |
| Surname | Anderson |
| Given Name | Thomas |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 33 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Ellsworth Township |
| 1935 Residence (County) | Hamilton |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farming |
| Class of Worker | OA |
| Hours Worked | 60 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Farmer |
| Township / Ward | Ellsworth Township |
| Est. Birth Year | ~1907 |
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 |
|---|---|---|---|---|
| Sharon Anderson | Daughter | — | 3 | ~1937 |
| Thomas Anderson | Head | — | 33 | ~1907 |
| Anna Anderson | Spouse | — | 31 | ~1909 |
Census Appearances
1920
Hamilton, Iowa
Son, age 13
Hamilton, Iowa · implied b. ~1907 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Anderson |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Norway |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Norwegian |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Hamilton, Iowa
Son, age 23
Hamilton, Iowa · implied b. ~1907 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Anderson |
| Given Name | Thomas |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Norway |
| Occupation | Farm Laborer |
| Industry | General |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Hamilton-County, Iowa
Head, age 33
Hamilton-County, Iowa · implied b. ~1907 — 3 household members
| Surname | Anderson |
| Given Name | Thomas |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 33 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Ellsworth Township |
| 1935 Residence (County) | Hamilton |
| Occupation | Farmer |
| Industry | Farming |
| Class of Worker | OA |
| Hours Worked | 60 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 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 Thomas Anderson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Lars Anderson (~0.92 confidence) and father Loek Anderson (~0.92 confidence) and mother Bertha Anderson (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Lars Anderson
b. ~1877
Source father
● Household
· direct · ~0.92
Father
Loek Anderson
b. ~1877
Source father
● Household
· direct · ~0.92
Mother
Bertha Anderson
b. ~1877
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Thomas Anderson
Head · 1940 · age 33 · b. ~1907 · Iowa
★ 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 — Hamilton-County, Iowa
Open full size
1940 US Federal Census — Hamilton-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01164-00292)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Betty Nelson | 17 | Daughter | — | Iowa |
| 2 | Peter Pater | 90 | Father | — | Denmark |
| 3 | Edgar Montgomery | 68 | Head | Farmer | Michigan |
| 4 | Libbie Montgomery | 75 | Sister | — | Canada English |
| 5 | Ole C. Hund | 54 | Head | Farmer | Iowa |
| 6 | Mary Hund | 51 | Wife | — | Iowa |
| 7 | Sterling Hund | 14 | Son | — | Iowa |
| 8 | Luther Hund | 13 | Son | — | Iowa |
| 9 | Laura Operander | 53 | Head | Farmer | Iowa |
| 10 | Glenn Operander | 19 | Son | — | Iowa |
| 11 | Edward Stoner | 63 | Head | Farmer | Iowa |
| 12 | Winnie Stoner | 59 | Wife | — | Illinois |
| 13 | Thomas Anderson THIS PERSON | 33 | Head | Farmer | Iowa |
| 14 | Anna Mae Anderson | 31 | Wife | — | Iowa |
| 15 | Sharon Anderson | 3 | Daughter | — | Iowa |
| 16 | Frank Hanson | 44 | Head | Farmer | Iowa |
| 17 | Mabel Hanson | 43 | Wife | — | Iowa |
| 18 | Hiram Anderson | 49 | Head | Farmer | Iowa |
| 19 | Severin Anderson | 54 | Brother | Farmer | Iowa |
| 20 | Ann Lewis | 57 | Servant | Servant | Iowa |
| 21 | Ruben Swenson | 26 | Head | Farmer | Iowa |
| 22 | Sven Swenson | 67 | Father | — | Iowa |
| 23 | Benjamin Swenson | 24 | Brother | Farm Hand | Iowa |
| 24 | Dora Swenson | 22 | Sister | — | Iowa |
| 25 | Omar Westre | 39 | Head | Farmer | Iowa |
| 26 | Bertha Westre | 39 | Wife | — | Iowa |
| 27 | Wavone Westre | 15 | Daughter | — | Iowa |
| 28 | Eugene Westre | 9 | Son | — | Iowa |
| 29 | Clarence Hove | 28 | Head | Farmer | Iowa |
| 30 | Bernice Hove | 25 | Wife | — | Iowa |
| 31 | Merlin Hove | 3 | Son | — | Iowa |
| 32 | Clarice Hove | 2 | Daughter | — | Iowa |
| 33 | James Johnson | 19 | Farm Hand | Farm Hand | Iowa |
| 34 | Irvin Hund | 45 | Head | Farmer | Iowa |
| 35 | Sosie Hund | 39 | Wife | — | Iowa |
| 36 | Marie Jane Hund | 9 | Daughter | — | Iowa |
| 37 | Marlin Hund | 44 | Brother | Farm Hand | Iowa |
| 38 | Sherman Swenson | 28 | Head | Farmer | Iowa |
| 39 | Judith Swenson | 23 | Wife | — | Iowa |
| 40 | Orlin Irvig | 25 | Farm Hand | Farm Hand | Iowa |
Pedigree Summary
Thomas
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)