JJ
John Jensen — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this John 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: Norway
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Jensen |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 58 |
| Marital Status | Married |
| Birthplace | Norway |
| 1935 Residence (City) | Elmwood Park |
| 1935 Residence (County) | Cook |
| Naturalization Status | First papers filed |
| Additional Details | |
| Occupation | Janitor |
| Industry | School |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 2171 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth Country | Norway |
| Birthplace (normalized) | norway |
| Occupation | Janitor |
| Township / Ward | Elmwood Park |
| 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 John | Age | Birth yr |
|---|---|---|---|---|
| Ella Jensen | Daughter | — | 30 | ~1910 |
| John Jensen | Head | — | 58 | ~1882 |
| Harry Jensen | Son | — | 16 | ~1924 |
| Christina Jensen | Spouse | — | 52 | ~1888 |
Census Appearances
1920
Cook, Illinois
Head, age 37
Cook, Illinois · implied b. ~1883 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jensen |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | Norway |
| Year of Immigration | 1903 |
| Naturalization Status | First papers filed |
| Father's Birthplace | Norway |
| Mother's Birthplace | Norway |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Norwegian |
| Home Owned/Rented | O |
| Home Free/Mortgaged | M |
| Birth Country | Norway |
| Birthplace (normalized) | norway |
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 | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 48 |
| Marital Status | Married |
| Birthplace | Norway |
| Naturalization Status | Naturalized |
| Year of Immigration | 1905 |
| Age at First Marriage | 25 |
| Father's Birthplace | Norway |
| Mother's Birthplace | Norway |
| Occupation | Laborer |
| Industry | Bldg Trades |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | Norwegian |
| Home Owned/Rented | O |
| Home Value / Rent | 10000 |
| Radio Set | R |
| Veteran | No |
| Birth Country | Norway |
| Birthplace (normalized) | norway |
1940
Cook-County, Illinois
Head, age 58
Cook-County, Illinois · implied b. ~1882 — 4 household members
| Surname | Jensen |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 58 |
| Marital Status | Married |
| Birthplace | Norway |
| 1935 Residence (City) | Elmwood Park |
| 1935 Residence (County) | Cook |
| Naturalization Status | First papers filed |
| Occupation | Janitor |
| Industry | School |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 2171 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth Country | Norway |
| Birthplace (normalized) | norway |
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 John Jensen across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John 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-t0627-00780-00608)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Eden Olsen | 21 | Son | Clerk | Illinois |
| 2 | Robert Olsen | 18 | Son | Laborer | Illinois |
| 3 | Stephen Hajostek | 48 | Head | Operator | Minnesota |
| 4 | Irene Hajostek | 32 | Wife | — | Arkansas |
| 5 | Frances Hajostek | 12 | Daughter | — | Illinois |
| 6 | Shirley Hajostek | 8 | Daughter | — | Illinois |
| 7 | Arthur Di Bernardino | 35 | Head | Stationary Engineer | Italy |
| 8 | Ida Di Bernardino | 45 | Wife | — | Germany |
| 9 | James Di Bernardino | 19 | Son | Pattern Maker | Illinois |
| 10 | Alfred Di Bernardino | 14 | Son | — | Illinois |
| 11 | Loretta Di Bernardino | 8 | Daughter | — | Illinois |
| 12 | James Pacura | 26 | Head | Apprentice Pressman | Illinois |
| 13 | Helen Pacura | 26 | Wife | — | Illinois |
| 14 | Nick Di Bernardino | 38 | Head | Junior Foreman | Italy |
| 15 | Cecira Di Bernardino | 32 | Wife | Dressmaker | Italy |
| 16 | Joyce Di Bernardino | 7 | Daughter | — | Illinois |
| 17 | John Jensen THIS PERSON | 58 | Head | Janitor | Norway |
| 18 | Christina Jensen | 52 | Wife | — | Denmark |
| 19 | Ella Jensen | 30 | Daughter | Stenographic Manager | Illinois |
| 20 | Harry Jensen | 16 | Son | — | Illinois |
| 21 | Herbert Ahrens | 44 | Head | Truck Driver | Illinois |
| 22 | Susan Ahrens | 42 | Wife | — | Wisconsin |
| 23 | Herbert Ahrens | 14 | Son | — | Illinois |
| 24 | Dorothy Ahrens | 10 | Daughter | — | Illinois |
| 25 | George Waller | 39 | Head | Stationary Engineer | Illinois |
| 26 | Blanche Waller | 22 | Wife | — | Illinois |
| 27 | Shirley Waller | 15 | Daughter | — | Illinois |
| 28 | Doris Waller | 12 | Daughter | — | Illinois |
| 29 | Norma Waller | 10 | Daughter | — | Illinois |
| 30 | George Waller | 8 | Son | — | Illinois |
| 31 | Charles Waller | 6 | Son | — | Illinois |
| 32 | Patricia Waller | 5 | Daughter | — | Illinois |
| 33 | Phillip Haggard | 42 | Head | Truck Driver | Illinois |
| 34 | Nellie Haggard | 43 | Wife | — | Illinois |
| 35 | Joseph Haggard | 18 | Son | — | Illinois |
| 36 | Phillip Haggard | 16 | Son | — | Illinois |
| 37 | Paul Haggard | 14 | Son | — | Illinois |
| 38 | John Haggard | 11 | Son | — | Illinois |
| 39 | Patrick Haggard | 9 | Son | — | Illinois |
| 40 | Eleanor Haggard | 4 | Daughter | — | Illinois |
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)