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Carl Jensen — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Black-Hawk-County, Iowa
Our Model Tree links this Carl Jensen across the 1920, 1930 and 1940 US Censuses in Black-Hawk-County, Iowa (XGBoost, ~Confirmed) — first a head (b.~1885), then head of a 4-person household.
Age 55
b. ~1885
Male
Head
Born: Denmark
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Black-Hawk-County, Iowa |
| Surname | Jensen |
| Given Name | Carl C |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 55 |
| Marital Status | Married |
| Birthplace | Denmark |
| 1935 Residence (City) | Mt. Vernon Twp. |
| 1935 Residence (County) | Black Hawk |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Farm Lab |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 70 |
| Income (1939) | 0 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth Country | Denmark |
| Birthplace (normalized) | denmark |
| Occupation | Farm Lab |
| Township / Ward | Mt Vernon Twp |
| Est. Birth Year | ~1885 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Carl | Age | Birth yr |
|---|---|---|---|---|
| Eula Jensen | Spouse | — | 50 | ~1890 |
| Ella Lashbrook | Other | — | 75 | ~1865 |
| Carl Jensen | Head | — | 55 | ~1885 |
| Carl Jensen | Son | — | 17 | ~1923 |
Census Appearances
1920
Freeborn, Minnesota
Head, age 34
Freeborn, Minnesota · implied b. ~1886 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jensen |
| Given Name | Carl C. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 34 |
| Marital Status | Married |
| Birthplace | Denmark |
| Year of Immigration | 1903 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Denmark |
| Occupation | Farmer |
| Industry | Gen Farm |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Danish |
| Home Owned/Rented | O |
| Home Free/Mortgaged | R |
| Birth Country | Denmark |
| Year of Naturalization | 1917 |
| Birthplace (normalized) | denmark |
1930
Black Hawk, …
Head, age 45
Black Hawk, Iowa · implied b. ~1885 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jensen |
| Given Name | Carl C |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Denmark |
| Naturalization Status | First papers filed |
| Year of Immigration | 1904 |
| Age at First Marriage | 34 |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Denmark |
| Occupation | Farmer |
| Industry | General Farm |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Mother Tongue | Danish |
| Home Owned/Rented | O |
| Home Value / Rent | 18 |
| Radio Set | R |
| Veteran | No |
| Birth Country | Denmark |
| Birthplace (normalized) | denmark |
1940
Black-Hawk-County, Iowa
Head, age 55
Black-Hawk-County, Iowa · implied b. ~1885 — 4 household members
| Surname | Jensen |
| Given Name | Carl C |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 55 |
| Marital Status | Married |
| Birthplace | Denmark |
| 1935 Residence (City) | Mt. Vernon Twp. |
| 1935 Residence (County) | Black Hawk |
| Naturalization Status | Naturalized |
| Occupation | Farm Lab |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 70 |
| Income (1939) | 0 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth Country | Denmark |
| Birthplace (normalized) | denmark |
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 Carl Jensen across 3 US Census years (1920, 1930 and 1940) in 3 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Carl Jensen
Head · 1940 · age 55 · b. ~1885 · 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 — Black-Hawk-County, Iowa
Open full size
1940 US Federal Census — Black-Hawk-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01139-00614)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Lila Seehuusen | 20 | Wife | Housework | Iowa |
| 2 | Darlene Seehuusen | 0 | Daughter | — | Iowa |
| 3 | Floyd B Bell | 42 | Head | Soil Conservation | Iowa |
| 4 | Ella Bell | 38 | Wife | — | Iowa |
| 5 | Edwin Westendorf | 26 | Head | Farm Lab | Iowa |
| 6 | Verena Westendorf | 22 | Wife | — | Iowa |
| 7 | Fred Buss | 25 | Head | Farm Labor | Iowa |
| 8 | Evelyn Buss | 26 | Wife | — | Iowa |
| 9 | Carl C Jensen THIS PERSON | 55 | Head | Farm Lab | Denmark |
| 10 | Eula Jensen | 50 | Wife | — | Iowa |
| 11 | Carl E Jensen | 17 | Son | — | Iowa |
| 12 | Ella Lashbrook | 75 | Mother-in-law | — | Wisconsin |
| 13 | Einer B Jacobson | 41 | Head | Labor | Denmark |
| 14 | Lillian M Jacobson | 31 | Wife | — | Iowa |
| 15 | Marion K Jacobson | 12 | Daughter | — | Iowa |
| 16 | Viola M Jacobson | 5 | Daughter | — | Iowa |
| 17 | Philip Pint | 63 | Head | Farm Labor | Iowa |
| 18 | Barbara Pint | 63 | Wife | — | Illinois |
| 19 | Gerald Pint | 25 | Son | Farm Labor | Iowa |
| 20 | Louis Nolte | 72 | Head | Farm Labor | Iowa |
| 21 | Emma Nolte | 70 | Wife | — | Iowa |
| 22 | Florence Nolte | 46 | Daughter | County Welfare | Iowa |
| 23 | Dan Stephens | 63 | Hired Man | Farm Lab | Kansas |
| 24 | Elmer E Paul | 39 | Head | Farm Labor | Iowa |
| 25 | Alice M Paul | 39 | Wife | — | Iowa |
| 26 | Vernon E Paul | 17 | Son | — | Iowa |
| 27 | Helen M Paul | 16 | Daughter | — | Iowa |
| 28 | Harold L Paul | 27 | Head | Farm Labor | Iowa |
| 29 | Viola M Paul | 28 | Wife | — | Iowa |
| 30 | Donna May Paul | 3 | Daughter | — | Iowa |
| 31 | Berdina Boek | 20 | Hired Girl | Domestic | Iowa |
| 32 | Louis Giesau | 19 | Hired Man | Farm Labor | Iowa |
| 33 | Fred Marsh | 52 | Head | Farm Labor | Germany |
| 34 | Lizzie Marsh | 49 | Wife | — | Iowa |
| 35 | Louis Heideman | 16 | Hired Man | Farm Labor | Iowa |
| 36 | End Of Section Heideman | None | — | — | — |
| 37 | Edwin R Funk | 53 | Head | Farm Labor | Iowa |
| 38 | Emelia Funk | 40 | Wife | — | Iowa |
| 39 | Ernest Jaschen | 41 | Head | Farm Labor | Iowa |
| 40 | Martha Jaschen | 42 | Wife | — | 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)