WJ
William Jensen — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this William Jensen across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1882), then head of a 4-person household.
Age 58
b. ~1882
Male
Head
Born: Denmark
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Jensen |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 58 |
| Marital Status | Married |
| Birthplace | Denmark |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same house |
| Birth Country | Denmark |
| Birthplace (normalized) | denmark |
| Township / Ward | Chicago |
| Est. Birth Year | ~1882 |
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 William | Age | Birth yr |
|---|---|---|---|---|
| Karen Jensen | Spouse | — | 57 | ~1883 |
| Harry Jensen | Son | — | 22 | ~1918 |
| William Jensen | Head | — | 58 | ~1882 |
| William Jensen | Son | — | 24 | ~1916 |
Census Appearances
1920
Cook, Illinois
Head, age 38
Cook, Illinois · implied b. ~1882 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jensen |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Denmark |
| Year of Immigration | 1904 |
| Naturalization Status | First papers filed |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Denmark |
| Occupation | Painter - Own Shop |
| Class of Worker | O |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Danish |
| Home Owned/Rented | R |
| Birth Country | Denmark |
| Birthplace (normalized) | denmark |
1930
Cook, Illinois
Head, age 48
Cook, Illinois · implied b. ~1882 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jensen |
| Given Name | Wm. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 48 |
| Marital Status | Married |
| Birthplace | Denmark |
| Naturalization Status | Naturalized |
| Year of Immigration | 1904 |
| Age at First Marriage | 44 |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Denmark |
| Occupation | Clerk |
| Industry | Cigars |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | Danish |
| Home Owned/Rented | R |
| Home Value / Rent | 32 |
| Veteran | Yes |
| Birth Country | Denmark |
| Birthplace (normalized) | denmark |
1940
Cook-County, Illinois
Head, age 58
Cook-County, Illinois · implied b. ~1882 — 4 household members
| Surname | Jensen |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 58 |
| Marital Status | Married |
| Birthplace | Denmark |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same house |
| 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 William Jensen across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
William Jensen
Head · 1940 · age 58 · b. ~1882 · Illinois
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Cook-County, Illinois
Open full size
1940 US Federal Census — Cook-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01011-00358)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Marie Bykowski | 54 | wife | — | Pennsylvania |
| 42 | Lawrence Bykowski | 28 | Son | Inspector | Illinois |
| 43 | Richard Bykowski | 26 | Son | Inspector | Illinois |
| 44 | George Bykowski | 23 | Son | Inspector | Illinois |
| 45 | Eileen Bykowski | 18 | Daughter | Grocery Clerk | Illinois |
| 46 | Ruth Bykowski | 13 | Daughter | — | Illinois |
| 47 | Carl A. Fischer | 57 | Head | Ornamental Iron Worker | Germany |
| 48 | Clara Fischer | 55 | wife | — | Germany |
| 49 | Michael Schauenecker | 64 | Head | Instrument Helper | Rumania |
| 50 | Theresa Schauenecker | 65 | wife | — | Rumania |
| 51 | Barbara Schauenecker | 30 | Daughter | Stenographer | New York |
| 52 | Howard H. Huecke | 44 | Head | Milk Delivery Driver | Illinois |
| 53 | Margaret Huecke | 45 | wife | — | Illinois |
| 54 | Howard Jr. Huecke | 20 | Son | Salesman | Illinois |
| 55 | Eva Kinsch | 73 | Mother-in-law | — | Germany |
| 56 | Matthew M. Heinzen | 48 | Head | Knitting Machine Repairer | Wisconsin |
| 57 | Elsie Heinzen | 46 | wife | — | Wisconsin |
| 58 | Dorothy Heinzen | 21 | Daughter | Stenographer | Wisconsin |
| 59 | Robert Heinzen | 10 | Son | — | Illinois |
| 60 | Margaret M. Mcbride | 50 | Head | — | Illinois |
| 61 | Jane Meyer | 66 | aunt | — | Illinois |
| 62 | John F. Gerlach | 68 | Head | — | Illinois |
| 63 | Margaret Gerlach | 66 | wife | — | Canada English |
| 64 | Marion Gerlach | 40 | Daughter | Stenographer | Illinois |
| 65 | Marguerite Gerlach | 38 | Daughter | Stenographer | Illinois |
| 66 | Kathleen Gerlach | 36 | Daughter | Telephone Operator | Illinois |
| 67 | Mercedes Gerlach | 23 | Daughter | Stenographer | Illinois |
| 68 | Francis J. Gerlach | 31 | Son | Truck Driver | Illinois |
| 69 | William Jensen THIS PERSON | 58 | Head | — | Denmark |
| 70 | Karen Jensen | 57 | wife | — | Denmark |
| 71 | William Jensen | 24 | Son | Painter Prop. | Illinois |
| 72 | Harry Jensen | 22 | Son | Delivery Man | Illinois |
| 73 | Louise Pattes | 54 | Head | — | Illinois |
| 74 | Ruth Pattes | 28 | Daughter | Beauty Operator | Illinois |
| 75 | Edwin Pattes | 26 | Son | Salesman | Illinois |
| 76 | Barbara Pattes | 5 | Granddaughter | — | Illinois |
| 77 | Joseph Peterson | 29 | Son-in-law | Grocery Prop. | Illinois |
| 78 | Lorraine Peterson | 23 | Daughter | Grocery Clerk | Illinois |
| 79 | Joseph Jr. Peterson | 1 | Grandson | — | Illinois |
| 80 | George O. Hibbs | 40 | Head | Station Prop. | 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)