ON
Oscar Nelson — 1940 US Census Record
Model Tree available1940 United States Federal Census · St.-Joseph-County, Indiana
Our Model Tree links this Oscar Nelson across the 1920, 1930 and 1940 US Censuses in St.-Joseph-County, Indiana (XGBoost, ~Confirmed), with identified parents Sophie & Chas — first a head (b.~1903), then head of a 3-person household.
Age 37
b. ~1903
Male
Head
Born: Indiana
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | St.-Joseph-County, Indiana |
| Surname | Nelson |
| Given Name | Oscar E. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | Indiana |
| 1935 Residence (City) | South Bend City |
| 1935 Residence (County) | St. Joseph |
| Additional Details | |
| Occupation | Machine Op. |
| Industry | Farm Equip. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1700 |
| Highest Grade | H-2 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Occupation | Machine Op. |
| Township / Ward | South Bend City |
| Est. Birth Year | ~1903 |
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 Oscar | Age | Birth yr |
|---|---|---|---|---|
| Mary Nelson | Daughter | — | 10 | ~1930 |
| Oscar Nelson | Head | — | 37 | ~1903 |
| Jane Nelson | Spouse | — | 27 | ~1913 |
Census Appearances
1920
St Joseph, …
Son, age 16
St Joseph, Indiana · implied b. ~1904 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nelson |
| Given Name | Oscar J |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Baker helper |
| Industry | Baking Co |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1930
St Joseph, …
Son, age 27
St Joseph, Indiana · implied b. ~1903 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nelson |
| Given Name | Oscar |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Machine Op. |
| Industry | Farm Machinery |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1940
St.-Joseph-County, Indiana
Head, age 37
St.-Joseph-County, Indiana · implied b. ~1903 — 3 household members
| Surname | Nelson |
| Given Name | Oscar E. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | Indiana |
| 1935 Residence (City) | South Bend City |
| 1935 Residence (County) | St. Joseph |
| Occupation | Machine Op. |
| Industry | Farm Equip. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1700 |
| Highest Grade | H-2 |
| 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 Nelson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Sophie Nelson (~0.92 confidence) and father Chas Nelson (~0.92 confidence) and father Carl Nelson (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Sophie Nelson
b. ~1860
Source mother
● Household
· direct · ~0.92
Father
Chas Nelson
b. ~1861
Source father
● Household
· direct · ~0.92
Father
Carl Nelson
b. ~1879
Source father
● Household
· direct · ~0.92
This person
Anchor record
Oscar Nelson
Head · 1940 · age 37 · b. ~1903 · Indiana
★ 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 — St.-Joseph-County, Indiana
Open full size
1940 US Federal Census — St.-Joseph-County, Indiana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01135-00118)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Winifred F. Clark | 56 | Wife | Press Lady | Wisconsin |
| 42 | Lloyd Bitters | 56 | Head | Salesman | Indiana |
| 43 | Jessie Bitters | 53 | Wife | Clerical | Michigan |
| 44 | Edwin W. Reinhold | 50 | Head | Letter Carrier | Illinois |
| 45 | Helen Reinhold | 48 | Wife | — | Illinois |
| 46 | Harry H. Kraft | 46 | Head | Stock Man | Michigan |
| 47 | Gladys Kraft | 33 | Wife | Clerk | Indiana |
| 48 | Richard Kraft | 5 | Son | — | — |
| 49 | Gladys Lucas | 21 | Niece | H. Office Work | Indiana |
| 50 | Leila Shanks | 76 | Lodger | — | Indiana |
| 51 | Florence Marshall | 26 | Maid | Maid | Indiana |
| 52 | Oscar E. Nelson THIS PERSON | 37 | Head | Machine Op. | Indiana |
| 53 | Jane R. Nelson | 27 | Wife | — | Michigan |
| 54 | Mary Lou Nelson | 10 | Daughter | — | Michigan |
| 55 | William H. Kraft | 49 | Head | Salesman | Illinois |
| 56 | Marie Kraft | 44 | Wife | — | Michigan |
| 57 | Robert Kraft | 14 | Son | Painter | Indiana |
| 58 | Mary Kraft | 11 | Daughter | Assistant | Indiana |
| 59 | Edward Kraft | 11 | Son | — | Indiana |
| 60 | Joseph O. Troutman | 51 | Head | Assembly Line | Indiana |
| 61 | Dottie Troutman | 49 | Wife | — | Indiana |
| 62 | Joseph Troutman | 18 | Son | — | Indiana |
| 63 | Paul Troutman | 10 | Son | — | Indiana |
| 64 | Arthur D. Megan | 49 | Head | Sales Engineer | Ohio |
| 65 | Josephine Megan | 34 | Wife | — | Indiana |
| 66 | Eleanor Megan | 21 | Son | Retail Mer. | Ohio |
| 67 | Arthur Megan | 19 | Son | — | Ohio |
| 68 | Kathleen Megan | 16 | Daughter | — | Ohio |
| 69 | Patricia J. Megan | 12 | Daughter | — | Ohio |
| 70 | Victor Sabo | 53 | Head | Truck Driver | Hungary |
| 71 | Ester Sabo | 52 | Wife | — | Michigan |
| 72 | Wilson Gebhardt | 29 | Head | Patent Agent | Ohio |
| 73 | Wahnita Gebhardt | 29 | Wife | — | Ohio |
| 74 | Lloyd Meyers | 42 | Head | Barber | Indiana |
| 75 | Ida Meyers | 39 | Wife | — | Indiana |
| 76 | Sonya Delores Meyers | 15 | Daughter | — | Indiana |
| 77 | George L. Ruiz | 33 | Head | Clerical W. | Indiana |
| 78 | Rose H. Ruiz | 31 | Wife | Knitter | Hungary |
| 79 | Herbert M. Duncan | 35 | Head | Clerical Work | Indiana |
| 80 | Florence Duncan | 33 | Wife | Pen Work | Indiana |
Pedigree Summary
Oscar
Gen 1 · 3 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)