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Louis Thompson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Hancock-County, Iowa
Our Model Tree links this Louis Thompson across the 1930 and 1940 US Censuses in Hancock-County, Iowa (XGBoost, ~Confirmed) — first a son (b.~1927), then head of a 6-person household.
Age 13
b. ~1927
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Hancock-County, Iowa |
| Surname | Thompson |
| Given Name | Louis H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Crystal Twp. |
| 1935 Residence (County) | Hancock |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Crystal Twp |
| Est. Birth Year | ~1927 |
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 Louis | Age | Birth yr |
|---|---|---|---|---|
| Carrie Thompson | Spouse | — | 53 | ~1887 |
| Louis Thompson | Son | — | 13 | ~1927 |
| Donald Thompson | Son | — | 10 | ~1930 |
| Mildred Thompson | Daughter | — | 14 | ~1926 |
| Alden Thompson | Head | — | 51 | ~1889 |
| Roland Thompson | Son | — | 17 | ~1923 |
Census Appearances
1930
Hancock, Iowa
Son, age 3
Hancock, Iowa · implied b. ~1927 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thompson |
| Given Name | Louis H |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Illinois |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Hancock-County, Iowa
Son, age 13
Hancock-County, Iowa · implied b. ~1927 — 6 household members
| Surname | Thompson |
| Given Name | Louis H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Crystal Twp. |
| 1935 Residence (County) | Hancock |
| 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 Louis Thompson across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Louis Thompson
Son · 1940 · age 13 · b. ~1927 · Iowa
★ You are viewing this record
Sibling
Mildred Thompson
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Roland Thompson
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Donald Thompson
Sibling · 1940 · age 10
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 — Hancock-County, Iowa
Open full size
1940 US Federal Census — Hancock-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01164-00872)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Herman Erdman | 45 | Hired man | Farm Laborer | Iowa |
| 42 | Lester H. Michelson | 53 | Head | Farmer | Iowa |
| 43 | May P. Michelson | 42 | Wife | — | Iowa |
| 44 | Vivian S. Michelson | 21 | Daughter | — | Iowa |
| 45 | Allen J. Michelson | 17 | Son | — | Iowa |
| 46 | Beverly M. Michelson | 11 | Daughter | — | Iowa |
| 47 | Alice A. Matson | 51 | Head | — | Iowa |
| 48 | Ida E. Matson | 50 | Sister | — | Iowa |
| 49 | Phoebe M. Matson | 44 | Sister | — | Iowa |
| 50 | Gertrude M. Matson | 41 | Sister | — | Iowa |
| 51 | Lloyd E. Webster | 27 | Hired hand | Farm Laborer | Missouri |
| 52 | Delbert M. Lundgren | 22 | Hired hand | Farm Laborer | Iowa |
| 53 | Harold A. Taft | 32 | Head | Electrician | Iowa |
| 54 | Jennie M. Taft | 34 | Wife | — | Illinois |
| 55 | Harold M. Taft | 1 | Son | — | Minnesota |
| 56 | Alvin A. Matson | 40 | Head | Farmer | Iowa |
| 57 | Henrietta Matson | 36 | Wife | — | Iowa |
| 58 | Merwin D. Matson | 2 | Son | — | Iowa |
| 59 | Olof Swanson | 56 | Cousin | — | Sweden |
| 60 | Francis W. Lundgren | 20 | Hired hand | Farm Laborer | Iowa |
| 61 | Clarence O. Lundgren | 45 | Head | Farmer | Iowa |
| 62 | Ellen E. Bird | 44 | Partner | — | Iowa |
| 63 | Leonard L. Bird | 25 | Partner's son | — | Iowa |
| 64 | Clifford O. Bird | 24 | Partner's son | — | Iowa |
| 65 | Fay E. Bird | 22 | Partner's son | — | Iowa |
| 66 | Kenneth H. Bird | 20 | Partner's son | — | Iowa |
| 67 | Ramona J. Bird | 18 | Partner's daughter | — | Iowa |
| 68 | Muriel G. Bird | 17 | Partner's daughter | — | Iowa |
| 69 | Alden Thompson | 51 | Head | Farmer | Iowa |
| 70 | Carrie A. Thompson | 53 | Wife | — | Illinois |
| 71 | Roland R. Thompson | 17 | Son | — | Iowa |
| 72 | Mildred J. Thompson | 14 | Daughter | — | Iowa |
| 73 | Louis H. Thompson THIS PERSON | 13 | Son | — | Iowa |
| 74 | Donald E. Thompson | 10 | Son | — | Iowa |
| 75 | Rola G. Thompson | 21 | Head | Farm Laborer | Iowa |
| 76 | Alice M. Thompson | 20 | Wife | — | Iowa |
| 77 | John H. Lanquist | 31 | Head | Farmer | Iowa |
| 78 | Lillian L. Lanquist | 32 | Wife | — | Iowa |
| 79 | Donavon A. Lanquist | 5 | Son | — | Iowa |
| 80 | Beverly A. Lanquist | 3 | Daughter | — | 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)