WJ
William Jensen — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Polk-County, Wisconsin
Our Model Tree links this William Jensen across the 1930 and 1940 US Censuses in Polk-County, Wisconsin (XGBoost, ~Confirmed) — first a head (b.~1908), then head of a 6-person household.
Age 32
b. ~1908
Male
Head
Born: Wisconsin
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Polk-County, Wisconsin |
| Surname | Jensen |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Wisconsin |
| 1935 Residence (City) | Eureka Town |
| 1935 Residence (County) | Polk |
| Additional Details | |
| Occupation | Farmer |
| Industry | Gen Farming |
| Class of Worker | OA |
| Hours Worked | 60 |
| Income (1939) | 46 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
| Occupation | Farmer |
| Township / Ward | Eureka Town |
| Est. Birth Year | ~1908 |
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 William | Age | Birth yr |
|---|---|---|---|---|
| William Jensen | Head | — | 32 | ~1908 |
| Ester Jensen | Spouse | — | 31 | ~1909 |
| Donald Jensen | Son | — | 6 | ~1934 |
| Joy Jensen | Daughter | — | 8 | ~1932 |
| William Jensen | Son | — | 9 | ~1931 |
| Merlin Jensen | Son | — | 4 | ~1936 |
Census Appearances
1930
Polk, Wisconsin
Head, age 21
Polk, Wisconsin · implied b. ~1909 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jensen |
| Given Name | William S. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Married |
| Birthplace | Wisconsin |
| Age at First Marriage | 21 |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Denmark |
| Occupation | Farmer |
| Industry | Dairy farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
1940
Polk-County, Wisconsin
Head, age 32
Polk-County, Wisconsin · implied b. ~1908 — 6 household members
| Surname | Jensen |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Wisconsin |
| 1935 Residence (City) | Eureka Town |
| 1935 Residence (County) | Polk |
| Occupation | Farmer |
| Industry | Gen Farming |
| Class of Worker | OA |
| Hours Worked | 60 |
| Income (1939) | 46 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
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 William Jensen across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Jensen
Head · 1940 · age 32 · b. ~1908 · Wisconsin
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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 — Polk-County, Wisconsin
Open full size
1940 US Federal Census — Polk-County, Wisconsin
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-04512-00333)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Magnus Thies | 22 | Head | Gen. Farming | Minnesota |
| 2 | Helen Thies | 21 | Wife | — | Wisconsin |
| 3 | Mrs. Charlotte Peterson | 71 | Lodger | — | Denmark |
| 4 | William Jensen THIS PERSON | 32 | Head | Farmer | Wisconsin |
| 5 | Ester Jensen | 31 | Wife | — | Wisconsin |
| 6 | William Jensen | 9 | Son | — | Wisconsin |
| 7 | Joy E. Jensen | 8 | Daughter | — | Wisconsin |
| 8 | Donald Jensen | 6 | Son | — | Wisconsin |
| 9 | Merlin Jensen | 4 | Son | — | Wisconsin |
| 10 | Nels G. Nelson | 53 | Head | Farmer | Wisconsin |
| 11 | Anna Nelson | 48 | Wife | — | Wisconsin |
| 12 | Karen Nelson | 16 | Son | — | Wisconsin |
| 13 | Mrs. Hazel Hoover | 53 | Head | — | Iowa |
| 14 | Ben F. Hansen | 37 | Head | Farming | Wisconsin |
| 15 | Martha Hansen | 28 | Wife | — | Minnesota |
| 16 | Leroy Hansen | 8 | Son | — | Minnesota |
| 17 | Ronald Hansen | 3 | Son | — | Minnesota |
| 18 | Robert Hansen | 0 | Son | — | Wisconsin |
| 19 | Mrs. Emma Gleason | 52 | Head | — | Minnesota |
| 20 | Lola Gleason | 16 | Daughter | — | Minnesota |
| 21 | David Gleason | 14 | Son | — | Minnesota |
| 22 | Henry Thies | 68 | Head | Farmer | Iowa |
| 23 | Elizabeth Thies | 51 | Wife | — | Iowa |
| 24 | Robert Thies | 14 | Son | — | Wisconsin |
| 25 | John A. Jensen | 75 | Head | Farmer | Wisconsin |
| 26 | Jennie Jensen | 41 | Wife | — | Iowa |
| 27 | James Jensen | 12 | Son | — | Wisconsin |
| 28 | Howard Johnson | 35 | Head | Farmer | Iowa |
| 29 | Ina Johnson | 28 | Wife | — | Minnesota |
| 30 | Marjorie Johnson | 9 | Daughter | — | Wisconsin |
| 31 | Mirion Johnson | 8 | Daughter | — | Wisconsin |
| 32 | Earl Johnson | 6 | Son | — | Wisconsin |
| 33 | Dorothy Johnson | 4 | Daughter | — | Wisconsin |
| 34 | Norman Johnson | 2 | Son | — | Wisconsin |
| 35 | John Peterson | 23 | Head | Farmer | Minnesota |
| 36 | Cecelia Peterson | 63 | Mother | — | Denmark |
| 37 | George A. Anderson | 42 | Head | Farmer | Wisconsin |
| 38 | Ethel M. Anderson | 33 | Wife | — | Pennsylvania |
| 39 | Daniel E. Anderson | 12 | Son | — | Wisconsin |
| 40 | Carrie Ann Anderson | 7 | Daughter | — | Wisconsin |
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)