OJ
Oliver Johnson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Jefferson-County, Illinois
Our Model Tree links this Oliver Johnson across the 1920, 1930 and 1940 US Censuses in Jefferson-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1889), then head of a 5-person household.
Age 51
b. ~1889
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Jefferson-County, Illinois |
| Surname | Johnson |
| Given Name | Oliver S |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Webber Twp |
| 1935 Residence (County) | Jefferson |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 50 |
| Income (1939) | 0 |
| Highest Grade | No 5 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Farmer |
| Township / Ward | Webber Twp |
| 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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Oliver | Age | Birth yr |
|---|---|---|---|---|
| Aregetta Johnson | Spouse | — | 45 | ~1895 |
| Louise Johnson | Daughter | — | 8 | ~1932 |
| Dorothy Johnson | Daughter | — | 15 | ~1925 |
| Ruth Johnson | Daughter | — | 12 | ~1928 |
| Oliver Johnson | Head | — | 51 | ~1889 |
Census Appearances
1920
Jefferson, Illinois
Head, age 32
Jefferson, Illinois · implied b. ~1888 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Oliver |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | O |
| Home Free/Mortgaged | F |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Jefferson, Illinois
Head, age 41
Jefferson, Illinois · implied b. ~1889 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Oliver |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 27 |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Veteran | No |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Jefferson-County, Illinois
Head, age 51
Jefferson-County, Illinois · implied b. ~1889 — 5 household members
| Surname | Johnson |
| Given Name | Oliver S |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Webber Twp |
| 1935 Residence (County) | Jefferson |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 50 |
| Income (1939) | 0 |
| Highest Grade | No 5 |
| 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 Oliver Johnson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Oliver Johnson
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 — Jefferson-County, Illinois
Open full size
1940 US Federal Census — Jefferson-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00816-00974)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Gertie M Brown | 45 | Wife | — | Illinois |
| 42 | Vera Brown | 13 | Daughter | — | Illinois |
| 43 | Lavada Brown | 11 | Daughter | — | Illinois |
| 44 | Lloyd Brown | 5 | Son | — | Illinois |
| 45 | Travis Cameron | 23 | Head | 000 | Illinois |
| 46 | Leona Cameron | 21 | Wife | — | Illinois |
| 47 | Donald C Cameron | 1 | Son | — | Illinois |
| 48 | Herschel R Kreff | 44 | Head | Proprietor | Illinois |
| 49 | Beulah Kreff | 38 | Wife | — | Illinois |
| 50 | Marjorie Kreff | 12 | Daughter | — | Illinois |
| 51 | Mary Kreff | 9 | Daughter | — | Illinois |
| 52 | Geraldine Kreff | 5 | Daughter | — | Illinois |
| 53 | Joyce Ann Kreff | 1 | Daughter | — | Illinois |
| 54 | Harold O White | 23 | Head | Farmer | Illinois |
| 55 | Virginia White | 18 | Wife | — | Illinois |
| 56 | Claude Lockby | 48 | Head | Car Repairer Helper | Arkansas |
| 57 | Martha Lockby | 46 | Wife | — | Illinois |
| 58 | Ralph Lockby | 19 | Son | Truck Driver | Illinois |
| 59 | Geraldine Lockby | 17 | Daughter | — | Illinois |
| 60 | Sharlotte Lockby | 13 | Daughter | — | Illinois |
| 61 | James Lockby | 8 | Son | — | Illinois |
| 62 | Dorothy D. Lockby | 6 | Daughter | — | Illinois |
| 63 | Calvin O Williams | 35 | Head | 26 | Illinois |
| 64 | Rufus L Shelton | 64 | Head | 7 | Illinois |
| 65 | Hershel Shelton | 31 | Son | Farmer | Illinois |
| 66 | Alice Shelton | 20 | Daughter | — | Illinois |
| 67 | Fred Russell | 50 | Head | Farmer | Illinois |
| 68 | Blanche Russell | 45 | Wife | — | Illinois |
| 69 | Oliver S Johnson THIS PERSON | 51 | Head | Farmer | Illinois |
| 70 | Aregetta Johnson | 45 | Wife | — | Illinois |
| 71 | Dorothy L Johnson | 15 | Daughter | — | Illinois |
| 72 | Ruth Johnson | 12 | Daughter | — | Illinois |
| 73 | Louise Johnson | 8 | Daughter | — | Illinois |
| 74 | Allen R Smith | 60 | Head | Farmer | Illinois |
| 75 | William Smith | 35 | Son | Farm Hand | Illinois |
| 76 | Jack Smith | 29 | Son | Farm Hand | Illinois |
| 77 | Dorothy Smith | 20 | Daughter | — | Illinois |
| 78 | Travis Green | 35 | Head | Salesman | Illinois |
| 79 | Helen Green | 33 | Wife | Teacher | Illinois |
| 80 | Frank Blythe | 45 | Head | Carpenter | 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)