OJ
Oscar Johnson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Marion-County, Indiana
Our Model Tree links this Oscar Johnson across the 1920, 1930 and 1940 US Censuses in Marion-County, Indiana (XGBoost, ~Confirmed), with identified parents Benjamin & Ben — first a son (b.~1913), then head of a 7-person household.
Age 27
b. ~1913
Male
Son
Born: Indiana
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Marion-County, Indiana |
| Surname | Johnson |
| Given Name | Oscar |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Indianapolis City |
| 1935 Residence (County) | Marion |
| Additional Details | |
| Hours Worked | 60 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Township / Ward | Indianapolis City |
| Est. Birth Year | ~1913 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Oscar | Age | Birth yr |
|---|---|---|---|---|
| Margaret Johnson | Daughter | — | 16 | ~1924 |
| Leona Johnson | Daughter | — | 11 | ~1929 |
| Bertha Johnson | Daughter | — | 14 | ~1926 |
| Emma Johnson | Head | — | 53 | ~1887 |
| Clarence Johnson | Son | — | 18 | ~1922 |
| Oscar Johnson | Son | — | 27 | ~1913 |
| Floyd Johnson | Son | — | 24 | ~1916 |
Census Appearances
1920
Marion, Indiana
Son, age 6
Marion, Indiana · implied b. ~1914 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Oscar |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Can Write | Yes |
| Speaks English | none |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1930
Marion, Indiana
Son, age 17
Marion, Indiana · implied b. ~1913 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Oscar |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Can Read/Write | Yes |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1940
Marion-County, Indiana
Son, age 27
Marion-County, Indiana · implied b. ~1913 — 7 household members
| Surname | Johnson |
| Given Name | Oscar |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Indianapolis City |
| 1935 Residence (County) | Marion |
| Hours Worked | 60 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
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 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Benjamin Johnson (~0.92 confidence) and father Ben Johnson (~0.92 confidence) and mother Emma Johnson (~0.92 confidence) and mother Georgia Johnson (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Benjamin Johnson
b. ~1871
Source father
● Household
· direct · ~0.92
Father
Ben Johnson
b. ~1872
Source father
● Household
· direct · ~0.92
Mother
Emma Johnson
b. ~1887
Source mother
● Household
· direct · ~0.92
Mother
Georgia Johnson
b. ~1874
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Oscar Johnson
Son · 1940 · age 27 · b. ~1913 · Indiana
★ You are viewing this record
Sibling
Floyd Johnson
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Johnson
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bertha Johnson
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Clarence Johnson
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Leona Johnson
Sibling · 1940 · age 11
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 — Marion-County, Indiana
Open full size
1940 US Federal Census — Marion-County, Indiana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01125-00145)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Lulu Williams | 43 | Head | — | Kentucky |
| 2 | Robt. Miles | 28 | Head | Labor | Kentucky |
| 3 | Juanita Miles | 22 | Wife | — | Indiana |
| 4 | Stella Robbins | 27 | Lodger | Gen House Maid | Kentucky |
| 5 | Edward Jameson | 31 | Head | — | Indiana |
| 6 | Martha Jameson | 31 | Wife | — | Mississippi |
| 7 | Della B. Jameson | 14 | Daughter | — | Mississippi |
| 8 | Home Guest Block 38 + Jameson | 50 | Boarder | — | — |
| 9 | James A. Alexander | 52 | Head | — | Kentucky |
| 10 | Lucy Alexander | 62 | Wife | — | Kentucky |
| 11 | James Raddie | 54 | Head | Trucking | Kentucky |
| 12 | Edward Lewis | 35 | Lodger | Labor | Indiana |
| 13 | John Herrington | 71 | Head | — | Kentucky |
| 14 | Henrietta Eubanks | 38 | Daughter | Cook | Kentucky |
| 15 | Emma Johnson | 53 | Head | Gen House Maid | Kentucky |
| 16 | Oscar Johnson THIS PERSON | 27 | Son | — | Indiana |
| 17 | Floyd Johnson | 24 | Son | — | Indiana |
| 18 | Clarence Johnson | 18 | Son | Labor | Indiana |
| 19 | Margaret Johnson | 16 | Daughter | — | Indiana |
| 20 | Bertha Johnson | 14 | Daughter | — | Indiana |
| 21 | Leona Johnson | 11 | Daughter | — | Indiana |
| 22 | Lee Willis | 49 | Head | Labor | Kentucky |
| 23 | Cornelia Willis | 48 | Wife | — | Mississippi |
| 24 | Betty Hatch | 85 | Mother-in-law | — | No. Carolina |
| 25 | Albert Butler | 34 | Head | — | Indiana |
| 26 | Helen Butler | 35 | Wife | — | Indiana |
| 27 | William Matreim | 30 | Head | — | Mississippi |
| 28 | Marilyn Matreim | 3 | Daughter | — | Indiana |
| 29 | George Bell | 23 | Head | Clean Car | Kentucky |
| 30 | Adaline Bell | 19 | Wife | — | Kentucky |
| 31 | Delores Blunt | 41 | Head | Maid | Kentucky |
| 32 | William Blunt | 26 | Son | Porter | Kentucky |
| 33 | Lawrence Alexander | 28 | Head | Janitor | Kentucky |
| 34 | Ardelia Alexander | 25 | Wife | Gen House Maid | Kentucky |
| 35 | Annie Alexander | 13 | Daughter | — | Kentucky |
| 36 | Clesta Moore | 32 | Sister-in-law | Gen House Maid | Kentucky |
| 37 | Lee Lewis | 48 | Head | Porter | Kentucky |
| 38 | Martha Lewis | 45 | Wife | — | Kentucky |
| 39 | Grant Moore | 38 | Brother-in-law | Waiter | Kentucky |
| 40 | Eusa Moore | 86 | Mother-in-law | — | Kentucky |
Pedigree Summary
Oscar + 5 siblings
Gen 1 · 4 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)