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Oscar Larson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Oscar Larson across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1893), then head of a 4-person household.
Age 47
b. ~1893
Male
Head
Born: Sweden
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Larson |
| Given Name | Oscar H. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Sweden |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | carpenter |
| Industry | building construction |
| Class of Worker | OA |
| Hours Worked | 40 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
| Occupation | Carpenter |
| Township / Ward | Chicago |
| Est. Birth Year | ~1893 |
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 |
|---|---|---|---|---|
| Richard Larson | Son | — | 15 | ~1925 |
| Oscar Larson | Head | — | 47 | ~1893 |
| Josephine Larson | Spouse | — | 42 | ~1898 |
| Robert Larson | Son | — | 19 | ~1921 |
Census Appearances
1920
Cook, Illinois
Other, age 28
Cook, Illinois · implied b. ~1892 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Larson |
| Given Name | Oscar |
| Relationship to Head | Lodger |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | Sweden |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Carpenter |
| Industry | B. & O. R.R. |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Swedish |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
1930
Cook, Illinois
Other, age 37
Cook, Illinois · implied b. ~1893 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Larson |
| Given Name | Oscar |
| Relationship to Head | Boarder |
| Sex | M |
| Color / Race | White |
| Age | 37 |
| Marital Status | Single |
| Birthplace | Sweden |
| Naturalization Status | Alien |
| Year of Immigration | 1905 |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Band saw |
| Industry | Hat factory |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | Swedish |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
1940
Cook-County, Illinois
Head, age 47
Cook-County, Illinois · implied b. ~1893 — 4 household members
| Surname | Larson |
| Given Name | Oscar H. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Sweden |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Occupation | carpenter |
| Industry | building construction |
| Class of Worker | OA |
| Hours Worked | 40 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
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.
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This person
Anchor record
Oscar Larson
Head · 1940 · age 47 · b. ~1893 · 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 — Cook-County, Illinois
Open full size
1940 US Federal Census — Cook-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00995-00303)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Harry Jenkins | 31 | Head | Printer | Illinois |
| 2 | Sunbeam Jenkins | 30 | Wife | None | Illinois |
| 3 | Nancy Lee Jenkins | 1 | Daughter | None | Illinois |
| 4 | Mary E. Jenkins | 68 | Mother | None | Ohio |
| 5 | Kenneth Litchfield | 28 | Head | Purchasing Agent | Illinois |
| 6 | Viola Litchfield | 31 | Wife | Operator | Illinois |
| 7 | Fred W. Sinclair | 59 | Head | Office Clerk | Scotland |
| 8 | Janet Sinclair | 59 | Wife | None | Scotland |
| 9 | Harold Sinclair | 26 | Son | Shipping Clerk | Illinois |
| 10 | Edward F. Farrell | 80 | Head | None | Illinois |
| 11 | Clara A. Farrell | 67 | Wife | None | Illinois |
| 12 | Elmer M. Hoderake|Hoderacke | 32 | Head | Manager | Illinois |
| 13 | Rosemary Hoderake|Hoderacke | 29 | Wife | None | Illinois |
| 14 | Barbara Anne Hoderake|Hoderacke | 3 | Daughter | None | Illinois |
| 15 | Albert C. Proehl | 48 | Head | Printer | Illinois |
| 16 | Lillian Proehl | 39 | Wife | None | Illinois |
| 17 | William D. Crowley | 44 | Head | Printer | Illinois |
| 18 | Bertha Crowley | 44 | Wife | None | Iowa |
| 19 | William J. Crowley | 20 | Son | None | Illinois |
| 20 | Bethel J. Isaacson | 53 | Head | Machinist | Illinois |
| 21 | Pauline B. Isaacson | 50 | Wife | None | Illinois |
| 22 | James F. Gilmer | 25 | Son-in-law | Bar Tender | Illinois |
| 23 | Dorothy G. Gilmer | 26 | Daughter | None | Illinois |
| 24 | Gustave A. Streeter | 44 | Head | Investigator | Illinois |
| 25 | Catherine Streeter | 36 | Wife | None | New York |
| 26 | Gerald Streeter | 2 | Son | None | Illinois |
| 27 | Fred J. Bohle | 54 | Head | Credit Clerk | Illinois |
| 28 | Laura L. Bohle | 54 | Wife | None | Illinois |
| 29 | Frances C. Bohle | 28 | Daughter | Stenographer | Illinois |
| 30 | Lenore G. Bohle | 17 | Daughter | None | Illinois |
| 31 | James H. Lenox | 85 | Father-in-law | None | New York |
| 32 | Ellis H. Wickman | 57 | Head | Electrician | Sweden |
| 33 | Anna Wickman | 52 | Wife | None | Sweden |
| 34 | Richard Wickman | 24 | Son | None | Illinois |
| 35 | John Anderson | 54 | Head | Carpenter | Sweden |
| 36 | Lolly Anderson | 51 | Sister | Forelady | Sweden |
| 37 | Oscar H. Larson THIS PERSON | 47 | Head | Carpenter | Sweden |
| 38 | Josephine C. Larson | 42 | Wife | None | Illinois |
| 39 | Robert H. Larson | 19 | Son | None | Illinois |
| 40 | Richard A. Larson | 15 | Son | None | 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)