OJ
Oscar Johnson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Madison-County, Illinois
Our Model Tree links this Oscar Johnson across the 1910, 1920, 1930 and 1940 US Censuses in Madison-County, Illinois (XGBoost, ~Confirmed), with identified parents Otto & Otto — first a son (b.~1906), then head of a 4-person household.
Age 34
b. ~1906
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Madison-County, Illinois |
| Surname | Johnson |
| Given Name | Oscar |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 34 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Moro Township |
| 1935 Residence (County) | Madison |
| Additional Details | |
| Occupation | Farm Laborer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 60 |
| Income (1939) | 0 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Farm Laborer |
| Township / Ward | Moro Township |
| Est. Birth Year | ~1906 |
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 Oscar | Age | Birth yr |
|---|---|---|---|---|
| Otto Johnson | Head | — | 60 | ~1880 |
| Oscar Johnson | Son | — | 34 | ~1906 |
| Harold Johnson | Son | — | 26 | ~1914 |
| Emma Johnson | Spouse | — | 60 | ~1880 |
Census Appearances
1910
Madison, Illinois
Son, age 4
Madison, Illinois · implied b. ~1906 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Oscar |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1920
Madison, Illinois
Son, age 14
Madison, Illinois · implied b. ~1906 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Oscar |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Madison, Illinois
Son, age 24
Madison, Illinois · implied b. ~1906 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Oscar |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | Labourer |
| Industry | Farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Madison-County, Illinois
Son, age 34
Madison-County, Illinois · implied b. ~1906 — 4 household members
| Surname | Johnson |
| Given Name | Oscar |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 34 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Moro Township |
| 1935 Residence (County) | Madison |
| Occupation | Farm Laborer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 60 |
| Income (1939) | 0 |
| Highest Grade | 8 |
| 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 Oscar Johnson across 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Otto Johnson (~0.92 confidence) and father Otto Johnson (~0.92 confidence) and father Otto Johnson (~0.92 confidence) and father Otto Johnson (~0.92 confidence) and mother Emma Johnson (~0.92 confidence) and mother Emma Johnson (~0.92 confidence) and mother Emma Johnson (~0.92 confidence). The pedigree spans 1 generation with 7 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Otto Johnson
b. ~1880
Source father
● Household
· direct · ~0.92
Father
Otto Johnson
b. ~1880
Source father
● Household
· direct · ~0.92
Father
Otto Johnson
b. ~1880
Source father
● Household
· direct · ~0.92
Father
Otto Johnson
b. ~1880
Source father
● Household
· direct · ~0.92
Mother
Emma Johnson
b. ~1881
Source mother
● Household
· direct · ~0.92
Mother
Emma Johnson
b. ~1880
Source mother
● Household
· direct · ~0.92
Mother
Emma Johnson
b. ~1880
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Oscar Johnson
Son · 1940 · age 34 · b. ~1906 · Illinois
★ You are viewing this record
Sibling
Harold Johnson
Sibling · 1940 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Madison-County, Illinois
Open full size
1940 US Federal Census — Madison-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00850-00858)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Reinder Duvall | 14 | Son | 6 | Illinois |
| 42 | Dorothy Duvall | 11 | Daughter | — | Illinois |
| 43 | John Duvall | 9 | Son | — | Illinois |
| 44 | Florence Duvall | 7 | Daughter | — | Illinois |
| 45 | Ester Duvall | 5 | Daughter | — | Illinois |
| 46 | Velma Duvall | 4 | Daughter | — | Illinois |
| 47 | John H. Mcgaughey | 62 | Head | Farmer | Illinois |
| 48 | Dora A. Mcgaughey | 54 | Wife | — | Illinois |
| 49 | Clarence Bivens | 50 | Head | Farmer | Illinois |
| 50 | Julia Bivens | 41 | Wife | — | Illinois |
| 51 | Clifford Bivens | 18 | Son | — | Illinois |
| 52 | Arlene Bivens | 12 | Daughter | — | Illinois |
| 53 | John H. Bartels | 69 | Head | Farmer | Illinois |
| 54 | Katherine Bartels | 69 | Wife | — | Illinois |
| 55 | Louisa Bartels | 28 | Daughter | — | Illinois |
| 56 | Wilbur Bartels | 33 | Head | Farmer | Illinois |
| 57 | Bertha Bartels | 34 | Wife | — | Illinois |
| 58 | Wilmer Bartels | 8 | Son | — | Illinois |
| 59 | Norman Bartels | 3 | Son | — | Illinois |
| 60 | Henry Middendorf | 37 | Head | Lutheran Minister | Indiana |
| 61 | Meta Middendorf | 37 | Wife | — | Illinois |
| 62 | Marvin Middendorf | 12 | Son | — | North Dakota |
| 63 | Salome Middendorf | 6 | Daughter | — | Illinois |
| 64 | Henry Emde | 67 | Head | Farmer | Illinois |
| 65 | Caroline Emde | 60 | Wife | — | Illinois |
| 66 | Hilma Emde | 23 | Daughter | Factory Work | Illinois |
| 67 | Edmund Emde | 29 | Son | Store Helper | Illinois |
| 68 | William Krieger | 52 | Head | Farmer | Illinois |
| 69 | Amanda Krieger | 44 | Wife | — | Illinois |
| 70 | Helen Krieger | 23 | Daughter | — | Illinois |
| 71 | Otto Johnson | 60 | Head | Farmer | Illinois |
| 72 | Emma Johnson | 60 | Wife | — | Illinois |
| 73 | Oscar Johnson THIS PERSON | 34 | Son | Farm Laborer | Illinois |
| 74 | Harold Johnson | 26 | Son | Factory Work | Illinois |
| 75 | Tom Christian | 71 | Head | Farmer | Germany |
| 76 | Frances Christian | 54 | Wife | — | Illinois |
| 77 | Hazel Christian | 26 | Daughter | — | Illinois |
| 78 | George Kabel | 60 | Head | Salesman | Illinois |
| 79 | Margaret Kabel | 57 | Wife | — | Illinois |
| 80 | Georgia Kabel | 21 | Daughter | — | Illinois |
Related Census Records
Pedigree Summary
Oscar + 1 sibling
Gen 1 · 7 parents
~0.92
Max depth 4 (1900–1950 window)
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)