CT
Clarence Thompson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Story-County, Iowa
Our Model Tree links this Clarence Thompson across the 1920, 1930 and 1940 US Censuses in Story-County, Iowa (XGBoost, ~Confirmed), with identified parents Thomas & Mrs — first a son (b.~1909), then head of a 5-person household.
Age 31
b. ~1909
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Story-County, Iowa |
| Surname | Thompson |
| Given Name | Clarence |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Lafayette Twp |
| 1935 Residence (County) | Story |
| Additional Details | |
| Occupation | Farming |
| Industry | on farm |
| 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 | Farming |
| Township / Ward | Lafayette Twp |
| Est. Birth Year | ~1909 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Clarence | Age | Birth yr |
|---|---|---|---|---|
| Mrs Thompson | Head | — | 60 | ~1880 |
| Anna Nelson | Other | — | 89 | ~1851 |
| Clarence Thompson | Son | — | 31 | ~1909 |
| Alvin Thompson | Son | — | 24 | ~1916 |
| Thomas Thompson | Spouse | — | 67 | ~1873 |
Census Appearances
1920
Story, Iowa
Son, age 11
Story, Iowa · implied b. ~1909 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thompson |
| Given Name | Clarence |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Norway |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Story, Iowa
Son, age 21
Story, Iowa · implied b. ~1909 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thompson |
| Given Name | Clarence |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Norway |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Story-County, Iowa
Son, age 31
Story-County, Iowa · implied b. ~1909 — 5 household members
| Surname | Thompson |
| Given Name | Clarence |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Lafayette Twp |
| 1935 Residence (County) | Story |
| Occupation | Farming |
| Industry | on farm |
| 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 Clarence Thompson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Thomas Thompson (~0.92 confidence) and mother Mrs Thompson (~0.92 confidence) and mother Mary Thompson (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Thomas Thompson
b. ~1873
Source father
● Household
· direct · ~0.92
Mother
Mrs Thompson
b. ~1880
Source mother
● Household
· direct · ~0.92
Mother
Mary Thompson
b. ~1881
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Clarence Thompson
Son · 1940 · age 31 · b. ~1909 · Iowa
★ You are viewing this record
Sibling
Alvin Thompson
Sibling · 1940 · age 24
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 — Story-County, Iowa
Open full size
1940 US Federal Census — Story-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01206-00602)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Duane Doolittle | 17 | Son | — | Iowa |
| 2 | Nayda Doolittle | 15 | Daughter | — | Iowa |
| 3 | Darrel Doolittle | 11 | Son | — | Iowa |
| 4 | Oliver N. Jacobs | 63 | Brother-in-law | Farming | Kansas |
| 5 | Ernest Routh | 21 | Hired hand | Farm Hand | Iowa |
| 6 | Floyd Peak | 52 | Head | Carpenter | Kansas |
| 7 | Edyth Peak | 50 | Wife | Housewife | Kansas |
| 8 | Dona Mae Peak | 17 | Daughter | — | Kansas |
| 9 | Olive Lansdown | 81 | Mother-in-law | — | Kentucky |
| 10 | Cora M. Brown | 60 | Head | Housekeeper | Iowa |
| 11 | Ralf G. Brown | 34 | Son | Trucking | Iowa |
| 12 | Dwight L. Brown | 22 | Son | Farming | Iowa |
| 13 | Orson S. Brown | 19 | Son | Farming | Iowa |
| 14 | Paul G. Brown | 17 | Son | — | Iowa |
| 15 | Milford L. Johnson | 31 | Head | Trucking | Iowa |
| 16 | Helen Johnson | 33 | Wife | Teaching | Iowa |
| 17 | Reno Brown | 28 | Head | Janitor | Iowa |
| 18 | Florence Brown | 24 | Wife | Housewife | Iowa |
| 19 | Byron Keith Brown | 4 | Son | — | Iowa |
| 20 | Rodney Wayne Brown | 2 | Son | — | Iowa |
| 21 | Paula Rae Brown | 0 | Daughter | — | Iowa |
| 22 | Ernest Jacob | 55 | Head | Farming | Kansas |
| 23 | Rosa Jacob | 53 | Wife | Housewife | South Dakota |
| 24 | Mary Louise Jacob | 13 | Daughter | — | Kansas |
| 25 | Phyllis Ann Jacob | 10 | Daughter | — | Kansas |
| 26 | Albert Frandson | 56 | Head | Farming | Iowa |
| 27 | Hallie Frandson | 44 | Wife | Housewife | Iowa |
| 28 | Richard Vaughan | 16 | Nephew | — | Iowa |
| 29 | Mrs. Mary Thompson | 60 | Head | Housewife | Norway |
| 30 | Thomas J. Thompson | 67 | Husband | Farming | Iowa |
| 31 | Clarence Thompson THIS PERSON | 31 | Son | Farming | Iowa |
| 32 | Alvin Thompson | 24 | Son | Trucking | Iowa |
| 33 | Anna Nelson | 89 | Mother | — | Norway |
| 34 | Tom H. Torkelson | 67 | Head | Farming | Iowa |
| 35 | Louise Torkelson | 56 | Wife | Housewife | Iowa |
| 36 | Thompson Foster | 35 | Head | Farm Hand | Missouri |
| 37 | Lula Foster | 32 | Wife | Housewife | Missouri |
| 38 | Erna Louise Foster | 12 | Daughter | — | — |
| 39 | Edna Irene Foster | 6 | Daughter | — | — |
| 40 | Thomas Henry Foster | 2 | Son | — | — |
Pedigree Summary
Clarence + 1 sibling
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)