WJ
William Jensen — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Lake-County, Montana
Our Model Tree links this William Jensen across the 1930 and 1940 US Censuses in Lake-County, Montana (XGBoost, ~Confirmed) — first a son (b.~1923), then head of a 9-person household.
Age 17
b. ~1923
Male
Son
Born: Idaho
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Lake-County, Montana |
| Surname | Jensen |
| Given Name | William Ray |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Idaho |
| 1935 Residence (City) | Mission Township |
| 1935 Residence (County) | Lake |
| Additional Details | |
| Occupation | Farm Laborer |
| Industry | Farm |
| Class of Worker | NP |
| Income (1939) | 0 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Idaho |
| Birth Country | United States |
| Birthplace (normalized) | idaho |
| Occupation | Farm Laborer |
| Township / Ward | Mission Township |
| Est. Birth Year | ~1923 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Ruth Jensen | Daughter | — | 15 | ~1925 |
| Ow Jensen | Head | — | 47 | ~1893 |
| Leo Jensen | Son | — | 12 | ~1928 |
| Bessie Jensen | Spouse | — | 45 | ~1895 |
| Phyllis Jensen | Daughter | — | 10 | ~1930 |
| Lea Jensen | Daughter | — | 22 | ~1918 |
| Louise Jensen | Daughter | — | 7 | ~1933 |
| Mary Jensen | Daughter | — | 19 | ~1921 |
| William Jensen | Son | — | 17 | ~1923 |
Census Appearances
1930
Lake, Montana
Son, age 7
Lake, Montana · implied b. ~1923 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jensen |
| Given Name | William R. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Idaho |
| Father's Birthplace | Mexico |
| Mother's Birthplace | Mexico |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Idaho |
| Birth Country | United States |
| Birthplace (normalized) | idaho |
1940
Lake-County, Montana
Son, age 17
Lake-County, Montana · implied b. ~1923 — 9 household members
| Surname | Jensen |
| Given Name | William Ray |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Idaho |
| 1935 Residence (City) | Mission Township |
| 1935 Residence (County) | Lake |
| Occupation | Farm Laborer |
| Industry | Farm |
| Class of Worker | NP |
| Income (1939) | 0 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Idaho |
| Birth Country | United States |
| Birthplace (normalized) | idaho |
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
Son · 1940 · age 17 · b. ~1923 · Montana
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Sibling
Phyllis Jensen
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lea Jensen
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Jensen
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ruth Jensen
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Leo Jensen
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Louise Jensen
Sibling · 1940 · age 7
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 — Lake-County, Montana
Open full size
1940 US Federal Census — Lake-County, Montana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02222-00251)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Stella Lee | 41 | Wife | — | Oklahoma |
| 2 | James Lee | 11 | Son | — | Montana |
| 3 | Ow Jensen | 47 | Head | Farmer | Mexico |
| 4 | Bessie Jensen | 45 | Wife | — | Mexico |
| 5 | Lea Jensen | 22 | Daughter | Stenographer | New Mexico |
| 6 | Mary Alice Jensen | 19 | Daughter | — | Arizona |
| 7 | William Ray Jensen THIS PERSON | 17 | Son | Farm Laborer | Idaho |
| 8 | Ruth Jensen | 15 | Daughter | — | Idaho |
| 9 | Leo Robert Jensen | 12 | Son | — | Montana |
| 10 | Phyllis Jensen | 10 | Daughter | — | Montana |
| 11 | Louise Jensen | 7 | Daughter | — | Montana |
| 12 | George Marks | 27 | Head | Farmer | Montana |
| 13 | Irene Marks | 26 | Wife | Teacher | Montana |
| 14 | Stephen Paul Matt | 44 | Head | Farm Laborer | Montana |
| 15 | Thomas J. Perkins | 60 | Head | Farmer | Arkansas |
| 16 | Agnes Perkins | 46 | Wife | — | Michigan |
| 17 | Henry F Marin | 32 | Head | Farmer | Washington |
| 18 | Rita Marin | 31 | Wife | — | Montana |
| 19 | Francis Deshaw | 10 | Step-son | — | Idaho |
| 20 | Olaf E. Anderson | 62 | Head | Farmer | Utah |
| 21 | Ruby Anderson | 53 | Wife | — | Utah |
| 22 | Lawrence R Anderson | 20 | Son | Farm Laborer | Canada English |
| 23 | Lila Anderson | 13 | Daughter | — | Idaho |
| 24 | Dale Anderson | 9 | Son | — | Idaho |
| 25 | Thomas Hooyenga | 50 | Head | Farmer | Holland |
| 26 | Gerda D. Hooyenga | 55 | Wife | — | Sweden |
| 27 | Richard Hooyenga | 19 | Son | Farm Laborer | Montana |
| 28 | Robert Hooyenga | 10 | Son | — | Montana |
| 29 | Del Stephens | 41 | Head | Farmer | Missouri |
| 30 | Marguerite Stephens | 29 | Wife | — | Idaho |
| 31 | Dixie Stephens | 2 | Daughter | — | Montana |
| 32 | Jean Harris | 12 | Daughter | — | Idaho |
| 33 | Charles Sanders | 44 | Head | Farmer | South Dakota |
| 34 | Mary Sanders | 38 | Wife | — | Scotland |
| 35 | Lester Sanders | 17 | Son | Farm Laborer | Montana |
| 36 | Mary Sanders | 16 | Daughter | — | Montana |
| 37 | Dorothy Sanders | 14 | Daughter | — | Montana |
| 38 | Alma Brower | 39 | Head | Farmer | Idaho |
| 39 | Argenta Brower | 36 | Wife | — | Idaho |
| 40 | Neil Brower | 15 | Son | — | Idaho |
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)