OJ
Oliver Johnson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Oliver Johnson across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1891), then head of a 3-person household.
Age 49
b. ~1891
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Johnson |
| Given Name | Oliver C. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 49 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Switchman |
| Industry | Iron Co. |
| Class of Worker | W |
| Hours Worked | 40 |
| Income (1939) | 2200 |
| Highest Grade | H 2 |
| 1935 Residence | Same House |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Switchman |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1891 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Oliver | Age | Birth yr |
|---|---|---|---|---|
| Oliver Johnson | Head | — | 49 | ~1891 |
| Oliver Johnson | Son | — | 16 | ~1924 |
| Bertha Johnson | Spouse | — | 50 | ~1890 |
Census Appearances
1920
Cook, Illinois
Other, age 28
Cook, Illinois · implied b. ~1892 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Oliver |
| Relationship to Head | Nephew |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Illinois |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Switchman |
| Industry | R.R. Co. |
| Class of Worker | W 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 39
Cook, Illinois · implied b. ~1891 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Oliver |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 28 |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Switchman |
| Industry | Steel Mill |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 50 |
| Radio Set | R |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Head, age 49
Cook-County, Illinois · implied b. ~1891 — 3 household members
| Surname | Johnson |
| Given Name | Oliver C. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 49 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Occupation | Switchman |
| Industry | Iron Co. |
| Class of Worker | W |
| Hours Worked | 40 |
| Income (1939) | 2200 |
| Highest Grade | H 2 |
| 1935 Residence | Same House |
| 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 Oliver Johnson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Oliver Johnson
Head · 1940 · age 49 · b. ~1891 · 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-t0627-00942-00616)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Donald Johnson | 9 | Son | — | Illinois |
| 2 | Shirley Johnson | 8 | Daughter | — | Illinois |
| 3 | Ronald Johnson | 3 | Son | — | Illinois |
| 4 | Oliver C. Johnson THIS PERSON | 49 | Head | Switchman | Illinois |
| 5 | Bertha M. Johnson | 50 | Wife | — | Ohio |
| 6 | Oliver C. Son Johnson | 16 | Son | — | Illinois |
| 7 | Lawrence Rubisich | 46 | Head | Inspector | Yugoslavia |
| 8 | Mary Rubisich | 36 | Wife | — | Illinois |
| 9 | Thomas Rubisich | 16 | Son | — | Illinois |
| 10 | J. G. Bergh | 64 | Head | Tug Captain | Norway |
| 11 | Emma Bergh | 62 | Wife | — | Michigan |
| 12 | Ralph L. Bergh | 30 | Son | Turbine Eng. | Michigan |
| 13 | Jane Bergh | 32 | Daughter in law | — | Michigan |
| 14 | George Chirp | 53 | Head | — | New York |
| 15 | Teresa Chirp | 52 | Wife | — | Illinois |
| 16 | George Jr. Chirp | 30 | Son | Operator | Illinois |
| 17 | Vernon Chirp | 28 | Son | Electrician | Illinois |
| 18 | Warren Caspery | 24 | Son in law | Railroad Clerk | Illinois |
| 19 | Joy Caspery | 21 | Daughter | Steno. | Illinois |
| 20 | Arthur Crist | 50 | Head | Insulator | Illinois |
| 21 | Ilega M. Crist | 42 | Wife | — | Illinois |
| 22 | John O'Rourke | 42 | Head | Steel Foreman | Illinois |
| 23 | Caroline O'Rourke | 40 | Wife | — | Illinois |
| 24 | Jack O'Rourke | 18 | Son | — | Illinois |
| 25 | Doris O'Rourke | 14 | Daughter | — | Illinois |
| 26 | Carol O'Rourke | 9 | Daughter | — | Illinois |
| 27 | Sophia Johnson | 56 | Head | — | Sweden |
| 28 | Mary Berk | 70 | Head | — | Sweden |
| 29 | Robert Berk | 34 | Son | Office | Illinois |
| 30 | Harry Berk | 39 | Son | Office | Illinois |
| 31 | John Hahn | 58 | Head | Pumper | New York |
| 32 | Rose Hahn | 52 | Wife | — | Germany |
| 33 | Charles Borg | 68 | Head | — | Germany |
| 34 | Raymond Berk | 24 | Head | Relief Man | Illinois |
| 35 | Bernice Berk | 23 | Wife | — | Illinois |
| 36 | Mathias Miller | 60 | Head | Bridge Tender | Luxemburg |
| 37 | Anna Miller | 56 | Wife | — | France |
| 38 | Alvira Berger | 65 | Head | — | Sweden |
| 39 | Phillip Metzger | 45 | Head | Electrician | Illinois |
| 40 | Clyda Metzger | 40 | Wife | — | 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)