JT
John Thomson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Clinton-County, Iowa
Our Model Tree links this John Thomson across the 1930 and 1940 US Censuses in Clinton-County, Iowa (XGBoost, ~Confirmed) — first a head (b.~1903), then head of a 6-person household.
Age 37
b. ~1903
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Clinton-County, Iowa |
| Surname | Thomson |
| Given Name | John W. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Clinton City |
| 1935 Residence (County) | Clinton |
| Additional Details | |
| Occupation | Laborer |
| Industry | Express Co. |
| Class of Worker | PW |
| Hours Worked | 51 |
| Income (1939) | 1440 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Laborer |
| Township / Ward | Clinton City |
| Est. Birth Year | ~1903 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Ray Thomson | Son | — | 13 | ~1927 |
| John Thomson | Head | — | 37 | ~1903 |
| Venita Thomson | Daughter | — | 7 | ~1933 |
| Harold Thomson | Son | — | 17 | ~1923 |
| Ralph Thomson | Son | — | 15 | ~1925 |
| Ruth Thomson | Spouse | — | 36 | ~1904 |
Census Appearances
1930
Clinton, Iowa
Head, age 27
Clinton, Iowa · implied b. ~1903 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomson |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 19 |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | Brakeman |
| Industry | Steam R. Road |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 15 |
| Radio Set | R |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Clinton-County, Iowa
Head, age 37
Clinton-County, Iowa · implied b. ~1903 — 6 household members
| Surname | Thomson |
| Given Name | John W. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Clinton City |
| 1935 Residence (County) | Clinton |
| Occupation | Laborer |
| Industry | Express Co. |
| Class of Worker | PW |
| Hours Worked | 51 |
| Income (1939) | 1440 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 John Thomson across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Thomson
Head · 1940 · age 37 · b. ~1903 · Iowa
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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 — Clinton-County, Iowa
Open full size
1940 US Federal Census — Clinton-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01150-00690)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | William D. Jacobsen | 83 | Head | — | Iowa |
| 2 | Nellie Jacobsen | 78 | Wife | — | New York |
| 3 | Sylvia E. Gellrich | 64 | Head | — | Iowa |
| 4 | Gertrude Bunnaker | 62 | Sister | — | Iowa |
| 5 | Erwin H. Kuehl | 32 | Head | Service-Man | Iowa |
| 6 | Kathryn M. Kuehl | 29 | Wife | — | Iowa |
| 7 | Jack E. Kuehl | 8 | Son | — | Iowa |
| 8 | Robert L. Kuehl | 7 | Son | — | Iowa |
| 9 | Shirley M. Kuehl | 5 | Daughter | — | Iowa |
| 10 | Judith A. Kuehl | 0 | Daughter | — | Iowa |
| 11 | Jens M. Larson | 68 | Head | — | Denmark |
| 12 | Johanna Larson | 65 | Wife | — | Iowa |
| 13 | Ralph H. Potter | 45 | Head | Writer | Iowa |
| 14 | Bernice Potter | 34 | Wife | — | Missouri |
| 15 | Dorothy Potter | 16 | Daughter | — | Missouri |
| 16 | John W. Thomson THIS PERSON | 37 | Head | Laborer | Illinois |
| 17 | Ruth R. Thomson | 36 | Wife | — | Iowa |
| 18 | Harold L. Thomson | 17 | Son | — | Iowa |
| 19 | Ralph Y. Thomson | 15 | Son | — | Iowa |
| 20 | Ray M. Thomson | 13 | Son | — | California |
| 21 | Venita R. Thomson | 7 | Daughter | — | Illinois |
| 22 | Sarah V. Fox | 85 | Head | — | Wisconsin |
| 23 | Anna Holm | 64 | Head | — | Iowa |
| 24 | Anna Sullivan | 34 | Head | Seamstress | Iowa |
| 25 | Robert L. Sullivan | 16 | Son | Waitress | Iowa |
| 26 | James L. Sullivan | 15 | Son | — | Iowa |
| 27 | Jessie M. Mace | 57 | Head | Laborer | Iowa |
| 28 | Millie A. Mace | 53 | Wife | — | Iowa |
| 29 | Jessie M. Jr. Mace | 19 | Son | Laborer | Illinois |
| 30 | Louis N. Raker | 28 | Head | Moulder | Iowa |
| 31 | William E. Raker | 24 | Brother | New Worker | Iowa |
| 32 | Gilbert L. Raker | 19 | Brother | New Worker | Iowa |
| 33 | Donald J. Raker | 16 | Brother | — | Iowa |
| 34 | Lena L. Hobein | 52 | Head | Proprietor | Iowa |
| 35 | Melvin Hobein | 29 | Son | Salesman | Iowa |
| 36 | David L. Westlake | 50 | Head | Cement Finisher | Illinois |
| 37 | Laverne M. Westlake | 37 | Wife | — | Wisconsin |
| 38 | Rose June A. Westlake | 16 | Daughter | — | Illinois |
| 39 | Lena E. Meyer | 83 | Head | — | Iowa |
| 40 | John Reiter | 63 | Son | Bartender | Iowa |
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)