WJ
William Jensen — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Humboldt-County, Iowa
Our Model Tree links this William Jensen across the 1930 and 1940 US Censuses in Humboldt-County, Iowa (XGBoost, ~Confirmed) — first a son (b.~1925), then head of a 9-person household.
Age 15
b. ~1925
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Humboldt-County, Iowa |
| Surname | Jensen |
| Given Name | William Harry |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Avery township |
| 1935 Residence (County) | Humboldt |
| Additional Details | |
| Highest Grade | H 1 |
| 1935 Residence | Same house |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Avery Township |
| Est. Birth Year | ~1925 |
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 |
|---|---|---|---|---|
| Marie Jensen | Other | — | 72 | ~1868 |
| Harry Jensen | Head | — | 45 | ~1895 |
| Robert Jensen | Son | — | 12 | ~1928 |
| William Jensen | Son | — | 15 | ~1925 |
| Dorris Jensen | Daughter | — | 10 | ~1930 |
| Dale Jensen | Son | — | 6 | ~1934 |
| Frank Jensen | Son | — | 8 | ~1932 |
| Cornelia Jensen | Spouse | — | 34 | ~1906 |
| Jens Jensen | Other | — | 36 | ~1904 |
Census Appearances
1930
Humboldt, Iowa
Son, age 5
Humboldt, Iowa · implied b. ~1925 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jensen |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | none |
| Can Read/Write | No |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Humboldt-County, Iowa
Son, age 15
Humboldt-County, Iowa · implied b. ~1925 — 9 household members
| Surname | Jensen |
| Given Name | William Harry |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Avery township |
| 1935 Residence (County) | Humboldt |
| Highest Grade | H 1 |
| 1935 Residence | Same house |
| 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 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 15 · b. ~1925 · Iowa
★ You are viewing this record
Sibling
Frank Jensen
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorris Jensen
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Jensen
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dale Jensen
Sibling · 1940 · age 6
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 — Humboldt-County, Iowa
Open full size
1940 US Federal Census — Humboldt-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01167-00445)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Fern Anderson | 24 | Wife | — | Iowa |
| 42 | Jens Jr. Anderson | 4 | Son | — | Iowa |
| 43 | James Allen Anderson | 1 | Son | — | Iowa |
| 44 | Marshall Hart | 24 | Head | Farmer | Iowa |
| 45 | Mable Hart | 26 | Wife | — | Iowa |
| 46 | Earl Dayton | 32 | Head | Farmer | Nebraska |
| 47 | Rena Dayton | 30 | Wife | — | Illinois |
| 48 | William Dayton | 3 | Son | — | Iowa |
| 49 | Axel Larson | 29 | Head | Farmer | Iowa |
| 50 | Nelka Larson | 29 | Wife | — | Iowa |
| 51 | Jon Larson | 2 | Son | — | Iowa |
| 52 | Joseph Forkalson | 39 | Head | Farmer | Iowa |
| 53 | Sophie Forkalson | 39 | Wife | — | Iowa |
| 54 | John Forkalson | 13 | Son | — | Iowa |
| 55 | Lois Forkalson | 8 | Daughter | — | Iowa |
| 56 | Janet Forkalson | 5 | Daughter | — | Iowa |
| 57 | Harry Jensen | 45 | Head | Farmer | Iowa |
| 58 | Cornelia Jensen | 34 | Wife | — | Iowa |
| 59 | William Harry Jensen THIS PERSON | 15 | Son | — | Iowa |
| 60 | Robert Peter Jensen | 12 | Son | — | Iowa |
| 61 | Dorris Joe Jensen | 10 | Daughter | — | Iowa |
| 62 | Frank Edward Jensen | 8 | Son | — | Iowa |
| 63 | Dale Norman Jensen | 6 | Son | — | Iowa |
| 64 | Marie Jensen | 72 | Mother | — | Denmark |
| 65 | Jens Thomas Jensen | 36 | Brother | Farmer | Iowa |
| 66 | Richard Thelgren | 53 | Head | Farmer | Iowa |
| 67 | Nena Thelgren | 48 | Wife | — | Iowa |
| 68 | Dale Clark | 30 | Head | Laborer | Nebraska |
| 69 | Donna Clark | 23 | Wife | — | Iowa |
| 70 | Donnie Clark | 1 | Daughter | — | Iowa |
| 71 | Burt De Groote | 65 | Head | Farmer | Iowa |
| 72 | Elisa De Groote | 57 | Wife | — | English Canada |
| 73 | William Doogle | 53 | Lodger | Laborer | Iowa |
| 74 | Leonard Baldwin | 28 | Head | Farmer | Iowa |
| 75 | Delores Baldwin | 28 | Wife | — | Iowa |
| 76 | C. G. Hoffman | 57 | Head | Farmer | Iowa |
| 77 | Hoffman | 50 | Wife | — | Minnesota |
| 78 | Harold Haffey | 29 | Head | Laborer | Kansas |
| 79 | Mary Haffey | 25 | Wife | — | Kansas |
| 80 | Robert Haffey | 2 | Son | — | Iowa |
Related Census Records
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)