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Louis Thompson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Clinton-County, Iowa
Our Model Tree links this Louis Thompson across the 1930 and 1940 US Censuses in Clinton-County, Iowa (XGBoost, ~Confirmed) — first a head (b.~1904), then head of a 7-person household.
Age 36
b. ~1904
Male
Head
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Clinton-County, Iowa |
| Surname | Thompson |
| Given Name | Louis |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Clinton City |
| 1935 Residence (County) | Clinton |
| Additional Details | |
| Occupation | Brick Layer |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 384 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Brick Layer |
| Township / Ward | Clinton City |
| Est. Birth Year | ~1904 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Louis | Age | Birth yr |
|---|---|---|---|---|
| Eleanor Thompson | Spouse | — | 34 | ~1906 |
| Louis Thompson | Head | — | 36 | ~1904 |
| Harold Thompson | Son | — | 8 | ~1932 |
| Joan Thompson | Daughter | — | 7 | ~1933 |
| Mary Thompson | Daughter | — | 7 | ~1933 |
| Mildred Thompson | Daughter | — | 3 | ~1937 |
| William Thompson | Son | — | 1 | ~1939 |
Census Appearances
1930
Clinton, Iowa
Head, age 26
Clinton, Iowa · implied b. ~1904 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thompson |
| Given Name | Louis |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Married |
| Birthplace | Iowa |
| Age at First Marriage | 24 |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | Carpenter |
| Industry | House |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 11 |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Clinton-County, Iowa
Head, age 36
Clinton-County, Iowa · implied b. ~1904 — 7 household members
| Surname | Thompson |
| Given Name | Louis |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Clinton City |
| 1935 Residence (County) | Clinton |
| Occupation | Brick Layer |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 384 |
| Highest Grade | H 4 |
| 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 Louis Thompson across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Louis Thompson
Head · 1940 · age 36 · b. ~1904 · 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-t0627-01150-00803)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Eleanor Gifford | 28 | Head | — | Iowa |
| 2 | Gary Allen Gifford | 4 | Son | — | Iowa |
| 3 | Henry Clausen | 23 | Brother-in-law | — | Iowa |
| 4 | John Michelsen | 40 | Head | Attendant | Illinois |
| 5 | Georgia Michelsen | 41 | Wife | Carpenter | Washington |
| 6 | Leroy Crane | 33 | Head | — | Iowa |
| 7 | Flora Crane | 31 | Wife | Laborer | Iowa |
| 8 | Alice Crane | 13 | Daughter | — | Iowa |
| 9 | Leroy Jr. Crane | 12 | Son | — | Iowa |
| 10 | Donald Crane | 10 | Son | — | Iowa |
| 11 | Gordon Crane | 1 | Son | — | Iowa |
| 12 | Dorothy Clausen | 18 | Sister-in-law | — | Iowa |
| 13 | Francis Comstock | 26 | Head | — | Iowa |
| 14 | Jacob Krempasky | 56 | Head | Millwright | Austria-Hungary |
| 15 | Kate Krempasky | 53 | Wife | Carpenter | Austria-Hungary |
| 16 | Dorothy Krempasky | 21 | Daughter | Seamstress | Ohio |
| 17 | Evelyn Krempasky | 19 | Daughter | Seamstress | Ohio |
| 18 | Niels H. Smith | 67 | Head | — | Ohio |
| 19 | Emma M. Smith | 69 | Wife | — | Iowa |
| 20 | Stephen Frisby | 51 | Head | Car Repairman | Iowa |
| 21 | Mary Frisby | 22 | Daughter | New Worker | Iowa |
| 22 | John Frisby | 20 | Son | — | Iowa |
| 23 | Nels Matthiesen | 49 | Head | Assembler | Iowa |
| 24 | Christina Matthiesen | 51 | Wife | Operator | Iowa |
| 25 | Alice Matthiesen | 50 | Sister | Operator | Iowa |
| 26 | Leonard B. Smith | 49 | Boarder | Street Work | Ohio |
| 27 | Louis Thompson THIS PERSON | 36 | Head | Brick Layer | Iowa |
| 28 | Eleanor Thompson | 34 | Wife | — | Oregon |
| 29 | Mary Louise Thompson | 7 | Daughter | — | Iowa |
| 30 | Harold Thompson | 8 | Son | — | South Dakota |
| 31 | Joan Thompson | 7 | Daughter | — | Iowa |
| 32 | Mildred Thompson | 3 | Daughter | — | Iowa |
| 33 | William Thompson | 1 | Son | — | Iowa |
| 34 | Charles H. Boyer | 70 | Head | Proprietor | Iowa |
| 35 | Dora Boyer | 64 | Wife | — | Germany |
| 36 | Erval B. Boyer | 43 | Son | Operator | Iowa |
| 37 | William Gerhardt | 82 | Head | — | Iowa |
| 38 | Anna Gerhardt | 74 | Wife | — | Illinois |
| 39 | Ray Senteney | 58 | Head | Press Hand | Missouri |
| 40 | Nell Senteney | 40 | Wife | — | Nebraska |
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)