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John Jacobson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this John Jacobson across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1889), then head of a 4-person household.
Age 51
b. ~1889
Male
Head
Born: Sweden
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Jacobson |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | Sweden |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Additional Details | |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1889 |
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 |
|---|---|---|---|---|
| John Jacobson | Head | — | 51 | ~1889 |
| Esther Jacobson | Spouse | — | 50 | ~1890 |
| Norman Jacobson | Son | — | 24 | ~1916 |
| Frances Jacobson | Daughter | — | 18 | ~1922 |
Census Appearances
1920
Cook, Illinois
Head, age 29
Cook, Illinois · implied b. ~1891 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jacobsen |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Married |
| Birthplace | Sweden |
| Year of Immigration | 1906 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Carpenter |
| Industry | Contractor |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Swedish |
| Home Owned/Rented | R |
| Birth Country | Sweden |
| Year of Naturalization | 1911 |
| Birthplace (normalized) | sweden |
1930
Cook, Illinois
Head, age 41
Cook, Illinois · implied b. ~1889 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jacobson |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Sweden |
| Naturalization Status | First papers filed |
| Year of Immigration | 1910 |
| Age at First Marriage | 24 |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Carpenter |
| Industry | Building |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | Swedish |
| Home Owned/Rented | O |
| Home Value / Rent | 6,000 |
| Radio Set | R |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
1940
Cook-County, Illinois
Head, age 51
Cook-County, Illinois · implied b. ~1889 — 4 household members
| Surname | Jacobson |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | Sweden |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
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 Jacobson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Jacobson
Head · 1940 · age 51 · b. ~1889 · Illinois
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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 — 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-t0627-00939-00613)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Arthur Roberts | 66 | Head | Sign Painter | New York |
| 2 | Selma Roberts | 56 | Wife | — | Illinois |
| 3 | Wayne Roberts | 18 | Son | — | Illinois |
| 4 | Arthur Swanson | 35 | Head | Musician | Illinois |
| 5 | Richard Allen Swanson | 5 | Son | — | Illinois |
| 6 | Barbara Swanson | 1 | Daughter | — | Illinois |
| 7 | Henry Bugelli | 35 | Head | Laborer | Italy |
| 8 | Marie Bugelli | 31 | Wife | — | Italy |
| 9 | Fred Bugelli | 28 | Son | Musician | Illinois |
| 10 | Gilda Bugelli | 21 | Daughter | Stenographer | Illinois |
| 11 | Chester Nowakowski | 25 | Son in law | Clerk | Illinois |
| 12 | Linda Nowakowski | 26 | Daughter | — | Illinois |
| 13 | John Chirones | 56 | Head | Chief | Greece |
| 14 | Alexandra Chirones | 51 | Wife | — | Greece |
| 15 | William Chirones | 22 | Son | Chocolate Mixer | Illinois |
| 16 | George Chirones | 20 | Son | New Worker | Illinois |
| 17 | Bessie Chirones | 15 | Daughter | — | Indiana |
| 18 | Theodore Chirones | 11 | Son | — | Illinois |
| 19 | Joseph Erskin | 67 | Head | — | Austria |
| 20 | Anne Erskin | 59 | Wife | — | Austria |
| 21 | George Erskin | 23 | Son | Engineer Helper | Illinois |
| 22 | Frank Erskin | 21 | Son | Water Meter Installer | Illinois |
| 23 | Carl Bergstrom | 58 | Head | Hammersmith | Sweden |
| 24 | Hilma Bergstrom | 56 | Wife | — | Sweden |
| 25 | Milton Bergstrom | 28 | Son | Catcher | Illinois |
| 26 | Ruth Bergstrom | 22 | Daughter | Key Punch Operator | Illinois |
| 27 | Dorothy Bergstrom | 19 | Daughter | Stenographer | Illinois |
| 28 | Russel Ashley Jones | 48 | Head | Machinist | Missouri |
| 29 | Jessie May Jones | 32 | Wife | — | Texas |
| 30 | Shirley Myra Jones | 13 | Daughter | — | Illinois |
| 31 | Nickolas Grow | 40 | Head | Machinist | Italy |
| 32 | Lina Grow | 37 | Wife | — | Texas |
| 33 | Fred Rodin | 49 | Head | Joiner | Sweden |
| 34 | Iris Rodin | 45 | Wife | — | Sweden |
| 35 | May Rodin | 20 | Daughter | Misser | Sweden |
| 36 | Bertil Rodin | 19 | Son | Salesman | Sweden |
| 37 | John Jacobson THIS PERSON | 51 | Head | — | Sweden |
| 38 | Esther Jacobson | 50 | Wife | — | Norway |
| 39 | Norman Jacobson | 24 | Son | Clerk | Illinois |
| 40 | Frances Jacobson | 18 | 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)