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Oscar Larson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Walworth-County, Wisconsin
Our Model Tree links this Oscar Larson across the 1920, 1930 and 1940 US Censuses in Walworth-County, Wisconsin (XGBoost, ~Confirmed), with identified parents Charles & Chas — first a son (b.~1919), then head of a 4-person household.
Age 21
b. ~1919
Male
Son
Born: Wisconsin
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Walworth-County, Wisconsin |
| Surname | Larson |
| Given Name | Oscar |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Wisconsin |
| 1935 Residence (City) | Walworth |
| 1935 Residence (County) | Walworth |
| Additional Details | |
| Occupation | Farm Hand |
| Industry | Farm |
| Class of Worker | PW |
| Hours Worked | 84 |
| Income (1939) | 360 |
| Highest Grade | No 8 |
| 1935 Residence | Wisconsin |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
| Occupation | Farm Hand |
| Township / Ward | Darien |
| Est. Birth Year | ~1919 |
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 |
|---|---|---|---|---|
| Oscar Larson | Son | — | 21 | ~1919 |
| Carl Larson | Son | — | 18 | ~1922 |
| Cornelia Larson | Other | — | 50 | ~1890 |
| Joseph Gilbert | Head | — | 57 | ~1883 |
Census Appearances
1920
Walworth, Wisconsin
Son, age 1
Walworth, Wisconsin · implied b. ~1919 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Larsen |
| Given Name | Oscar |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Wisconsin |
| Father's Birthplace | Norway |
| Mother's Birthplace | Norway |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
1930
Walworth, Wisconsin
Son, age 11
Walworth, Wisconsin · implied b. ~1919 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Larson |
| Given Name | Oscar |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Wisconsin |
| Father's Birthplace | Norway |
| Mother's Birthplace | Norway |
| Can Read/Write | Yes |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
1940
Walworth-County, Wisconsin
Son, age 21
Walworth-County, Wisconsin · implied b. ~1919 — 4 household members
| Surname | Larson |
| Given Name | Oscar |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Wisconsin |
| 1935 Residence (City) | Walworth |
| 1935 Residence (County) | Walworth |
| Occupation | Farm Hand |
| Industry | Farm |
| Class of Worker | PW |
| Hours Worked | 84 |
| Income (1939) | 360 |
| Highest Grade | No 8 |
| 1935 Residence | Wisconsin |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
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 Larson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Charles Larson (~0.92 confidence) and father Chas Larsen (~0.92 confidence) and father Joseph Gilbert (~0.92 confidence) and mother Cornelia Larson (~0.92 confidence) and mother Cornelia Larsen (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Charles Larson
b. ~1886
Source father
● Household
· direct · ~0.92
Father
Chas Larsen
b. ~1870
Source father
● Household
· direct · ~0.92
Father
Joseph Gilbert
b. ~1883
Source father
● Household
· direct · ~0.92
Mother
Cornelia Larson
b. ~1890
Source mother
● Household
· direct · ~0.92
Mother
Cornelia Larsen
b. ~1884
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Oscar Larson
Son · 1940 · age 21 · b. ~1919 · Wisconsin
★ You are viewing this record
Sibling
Carl Larson
Sibling · 1940 · age 18
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 — Walworth-County, Wisconsin
Open full size
1940 US Federal Census — Walworth-County, Wisconsin
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-04531-00332)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Leon Littlefield | 61 | Head | Owner & Tavern | Wisconsin |
| 2 | Grace Littlefield | 59 | Wife | — | Wisconsin |
| 3 | Janet K Littlefield | 5 | Daughter | — | Wisconsin |
| 4 | Jill Marie Littlefield | 2 | Daughter | — | Wisconsin |
| 5 | Edw. G. Berkholtz | 50 | Head | Plumber | Wisconsin |
| 6 | Ruth C Berkholtz | 47 | Wife | — | Illinois |
| 7 | Paul W Berkholtz | 26 | Son | Machinist | Wisconsin |
| 8 | Robert E Berkholtz | 25 | Son | Plumber | Wisconsin |
| 9 | Florence E Berkholtz | 22 | Daughter | — | Wisconsin |
| 10 | Francis Berkholtz | 19 | Daughter | — | Wisconsin |
| 11 | Kathryn L Berkholtz | 16 | Daughter | — | Wisconsin |
| 12 | Dorothy J Berkholtz | 10 | Daughter | — | Wisconsin |
| 13 | Sarg A Webster | 29 | Head | Farm Hand | S. Dakota |
| 14 | Florence L Webster | 21 | Wife | — | S. Dakota |
| 15 | Caralie J Webster | 1 | Daughter | — | Arizona |
| 16 | Phil N. Steffanus | 41 | Head | Farmer | Wisconsin |
| 17 | Emma M Steffanus | 38 | Wife | — | Wisconsin |
| 18 | Norbert Steffanus | 14 | Son | — | Wisconsin |
| 19 | Barbara Steffanus | 3 | Daughter | — | Wisconsin |
| 20 | Morris L Hartroff | 75 | Lodger | Farm Hand | Wisconsin |
| 21 | Truman J Davis | 47 | Head | Farmer | Wisconsin |
| 22 | Genevieve Davis | 46 | Wife | — | Wisconsin |
| 23 | Marion J Davis | 21 | Daughter | Teacher | Wisconsin |
| 24 | Gunnar Nelson | 51 | Lodger | Farm Hand | Sweden |
| 25 | Jake Huntress | 45 | Head | Painter | Wisconsin |
| 26 | Charles Mcsorley | 88 | Head | — | Connecticut |
| 27 | Gertrude Mcsorley | 61 | Daughter | Farmer | Wisconsin |
| 28 | Susanah Mcsorley | 48 | Daughter | — | Wisconsin |
| 29 | Wayne Gilbert | 14 | Lodger | — | Iowa |
| 30 | Leroy Messerschmidt | 36 | Head | Farm Hand | Wisconsin |
| 31 | Margaret G Messerschmidt | 35 | Wife | — | Wisconsin |
| 32 | Clifford L Messerschmidt | 9 | Son | — | Wisconsin |
| 33 | Myrtle M Messerschmidt | 8 | Daughter | — | Wisconsin |
| 34 | Arnold W Messerschmidt | 6 | Son | — | Wisconsin |
| 35 | George H Messerschmidt | 4 | Son | — | Wisconsin |
| 36 | Eileen J Messerschmidt | 1 | Daughter | — | Wisconsin |
| 37 | Joseph W Gilbert | 57 | Head | Farmer And Landscaper | Iowa |
| 38 | Cornelia Larson | 50 | Partner | — | Norway |
| 39 | Oscar Larson THIS PERSON | 21 | Son | Farm Hand | Wisconsin |
| 40 | Carl E Larson | 18 | Son | Farm Hand | Wisconsin |
Pedigree Summary
Oscar + 1 sibling
Gen 1 · 5 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)