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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.~1899), then head of a 6-person household.
Age 41
b. ~1899
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Jacobson |
| Given Name | John E. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Evanston City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Mail Carrier |
| Industry | U. S. Post Office |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 2100 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Mail Carrier |
| Township / Ward | Evanston City |
| Est. Birth Year | ~1899 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Jacobson | Head | — | 41 | ~1899 |
| Alice Jacobson | Spouse | — | 35 | ~1905 |
| O John | Other | — | 72 | ~1868 |
| Charmayne Jacobson | Daughter | — | 5 | ~1935 |
| Marvin Jacobson | Son | — | 6 | ~1934 |
| Arnold Jacobson | Son | — | 9 | ~1931 |
Census Appearances
1920
Cook, Illinois
Other, age 21
Cook, Illinois · implied b. ~1899
●
Primary link
· ~Confirmed · 1 source
XGBoost
| Surname | Jacobson |
| Given Name | John E |
| Relationship to Head | Board |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Stenographer |
| Industry | Public Service Co |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Head, age 31
Cook, Illinois · implied b. ~1899 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jacobson |
| Given Name | John E. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 29 |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Mail Carrier |
| Industry | Post Office |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 55 |
| Radio Set | R |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Head, age 41
Cook-County, Illinois · implied b. ~1899 — 6 household members
| Surname | Jacobson |
| Given Name | John E. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Evanston City |
| 1935 Residence (County) | Cook |
| Occupation | Mail Carrier |
| Industry | U. S. Post Office |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 2100 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 41 · b. ~1899 · 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-t0627-00779-00450)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Mildred C. Vesta | 52 | Wife | — | Illinois |
| 42 | Janet Louise Vesta | 16 | Daughter | — | California |
| 43 | James Jr. Dale | 27 | Head | Engineer | Michigan |
| 44 | Margaret Dale | 24 | Wife | — | Washington |
| 45 | Sarah Dale | 3 | Daughter | — | Illinois |
| 46 | John E. Jacobson THIS PERSON | 41 | Head | Mail Carrier | Illinois |
| 47 | Alice M. Jacobson | 35 | Wife | — | North Dakota |
| 48 | Arnold L. Jacobson | 9 | Son | — | Illinois |
| 49 | Marvin J. Jacobson | 6 | Son | — | Illinois |
| 50 | Charmayne A. Jacobson | 5 | Daughter | — | Illinois |
| 51 | O. John | 72 | Father | Painter | Sweden |
| 52 | Lawrence E. Marmon | 38 | Head | Carpenter | Illinois |
| 53 | Hazel A. Marmon | 37 | Wife | — | Illinois |
| 54 | Theron B. Ferguson | 38 | Head | Ticket Mgr. & Coach | North Carolina |
| 55 | Elizabeth L. Ferguson | 34 | Wife | — | Iowa |
| 56 | Eleanor C. Ferguson | 11 | Daughter | — | Iowa |
| 57 | Alice Jane Ferguson | 9 | Daughter | — | Iowa |
| 58 | Lorraine Ferguson | 2 | Daughter | — | Illinois |
| 59 | Sidney A. Wright | 45 | Head | Agent | Illinois |
| 60 | Marie Wright | 47 | Wife | — | Illinois |
| 61 | Jane Wright | 22 | Daughter | Clerk | Illinois |
| 62 | Gladys Muriel Wright | 19 | Daughter | — | Illinois |
| 63 | James M. Mercer | 52 | Head | Engineer | Iowa |
| 64 | Ada C. Mercer | 52 | Wife | — | Iowa |
| 65 | Margaret Mercer | 24 | Daughter | Director Of Admissions | Illinois |
| 66 | Marian Ab. Mercer | 21 | Daughter | — | Illinois |
| 67 | Sanford Mercer | 80 | Father | — | West Virginia |
| 68 | Herman C. Mueller | 62 | Head | Abstract Making | Germany |
| 69 | Minnie Mueller | 50 | Wife | — | Illinois |
| 70 | Hannah Mueller | 55 | Mother-in-law | — | Germany |
| 71 | Annie Mueller | 70 | Head | — | Illinois |
| 72 | Keefer Edward Mueller | 24 | Son-in-law | Optometrist | Illinois |
| 73 | Louise Mueller | 21 | Daughter | — | Illinois |
| 74 | Edward Jr. Mueller | 4 | Grandson | — | California |
| 75 | John Mueller | 0 | Grandson | — | Illinois |
| 76 | Everett C. Murphy | 43 | Head | Production Manager | Island of Jersey |
| 77 | Allie May Murphy | 44 | Wife | — | Georgia |
| 78 | Josephine Murphy | 19 | Daughter | — | Georgia |
| 79 | Barbara Murphy | 10 | Daughter | — | Canada |
| 80 | Louise Murphy | 9 | Daughter | — | Canada |
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)