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Oscar Larson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Freeborn-County, Minnesota
Our Model Tree links this Oscar Larson across the 1920, 1930 and 1940 US Censuses in Freeborn-County, Minnesota (XGBoost, ~Confirmed) — first a head (b.~1893), then head of a 9-person household.
Age 47
b. ~1893
Male
Head
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Freeborn-County, Minnesota |
| Surname | Larson |
| Given Name | Oscar E. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Albert Lea |
| 1935 Residence (County) | Freeborn |
| Additional Details | |
| Occupation | Proprietor |
| Industry | Grocery store |
| Class of Worker | OA |
| Hours Worked | 60 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Proprietor |
| Township / Ward | Albert Lea |
| 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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Oscar | Age | Birth yr |
|---|---|---|---|---|
| Bertha Larson | Spouse | — | 42 | ~1898 |
| Oscar Larson | Son | — | ~1940 | |
| Oscar Larson | Head | — | 47 | ~1893 |
| Margaret Larson | Daughter | — | 11 | ~1929 |
| Barbara Larson | Daughter | — | 4 | ~1936 |
| Robert Larson | Son | — | 19 | ~1921 |
| Kenneth Larson | Son | — | 17 | ~1923 |
| Lyle Larson | Son | — | 15 | ~1925 |
| Ida Larson | Daughter | — | 12 | ~1928 |
Census Appearances
1920
Worth, Iowa
Head, age 27
Worth, Iowa · implied b. ~1893 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Larson |
| Given Name | Oscar |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Norway |
| Occupation | Proprietor |
| Industry | Butcher Shop |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Freeborn, Minnesota
Head, age 37
Freeborn, Minnesota · implied b. ~1893 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Larson |
| Given Name | Oscar |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | Iowa |
| Age at First Marriage | 27 |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Norway |
| Occupation | Proprietor |
| Industry | Taxi |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 35 |
| Radio Set | R |
| Veteran | Yes WW |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Freeborn-County, Minnesota
Head, age 47
Freeborn-County, Minnesota · implied b. ~1893 — 9 household members
| Surname | Larson |
| Given Name | Oscar E. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Albert Lea |
| 1935 Residence (County) | Freeborn |
| Occupation | Proprietor |
| Industry | Grocery store |
| Class of Worker | OA |
| Hours Worked | 60 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
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 3 locations, using XGBoost record linkage.
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This person
Anchor record
Oscar Larson
Head · 1940 · age 47 · b. ~1893 · Minnesota
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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 — Freeborn-County, Minnesota
Open full size
1940 US Federal Census — Freeborn-County, Minnesota
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01922-00123)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Mabel Washburn | 48 | Daughter | Saleslady | Minnesota |
| 42 | Alice M. Addenstein | 89 | Head | — | Iowa |
| 43 | Lavern J. Cochran | 28 | Son-in-law | Sausage Maker | Oklahoma |
| 44 | Alvin C. Cochran | 33 | Daughter | — | Iowa |
| 45 | Daniel J. Brill | 45 | Head | Teacher | Wisconsin |
| 46 | Alice Lois Brill | 35 | Wife | — | Wisconsin |
| 47 | Alice Dejane Brill | 14 | Daughter | — | Wisconsin |
| 48 | Marie Grambert | 15 | Lodger | Maid | Iowa |
| 49 | Leonard H. Swenson | 37 | Head | Cashier | South Dakota |
| 50 | Dorothea M. Swenson | 30 | Wife | — | Minnesota |
| 51 | Joan Lou Swenson | 9 | Daughter | — | Minnesota |
| 52 | Jon Robert Swenson | 6 | Son | — | Minnesota |
| 53 | Oscar E. Larson THIS PERSON | 47 | Head | Proprietor | Iowa |
| 54 | Bertha Pearl Larson | 42 | Wife | — | Iowa |
| 55 | Robert R. Larson | 19 | Son | Clerk | Iowa |
| 56 | Kenneth C. Larson | 17 | Son | — | Minnesota |
| 57 | Lyle L. Larson | 15 | Son | — | Minnesota |
| 58 | Ida May Larson | 12 | Daughter | — | Minnesota |
| 59 | Margaret P. Larson | 11 | Daughter | — | Minnesota |
| 60 | Barbara M. Larson | 4 | Daughter | — | Minnesota |
| 61 | Oscar Dale Larson | 0 | Son | — | Minnesota |
| 62 | Arnold J. O. Jensen | 40 | Head | Die-Setter | Minnesota |
| 63 | Carroll O. Jensen | 13 | Son | — | Minnesota |
| 64 | Ardis H. Jensen | 8 | Daughter | — | Minnesota |
| 65 | Alvina S. Jepson | 30 | Servant | Maid | Minnesota |
| 66 | Cornelius P. Whelan | 43 | Head | Mail Carrier | Minnesota |
| 67 | Adelaide M. Whelan | 36 | Wife | — | Minnesota |
| 68 | Elizabeth Ann Whelan | 12 | Daughter | — | Minnesota |
| 69 | Zenobia E. Whelan | 10 | Daughter | — | Minnesota |
| 70 | Patricia M. Whelan | 9 | Daughter | — | Minnesota |
| 71 | Thomas D. Whelan | 7 | Son | — | Minnesota |
| 72 | Carolyn J. Whelan | 5 | Daughter | — | Minnesota |
| 73 | Ruth A. Rice | 18 | Servant | Maid | Minnesota |
| 74 | M. Earl Wambach | 39 | Head | Teacher | Minnesota |
| 75 | Laverne M. Wambach | 30 | Wife | — | North Dakota |
| 76 | Millard Strand | 18 | Brother-in-law | — | Minnesota |
| 77 | Ralph L. Ruble | 23 | Head | Chicken Hatcher | Minnesota |
| 78 | Alma L. O. Ruble | 18 | Wife | — | Iowa |
| 79 | Carol Joan Ruble | 2 | Daughter | — | Minnesota |
| 80 | Clara Bowman | 61 | Mother-in-law | — | Illinois |
Related Census Records
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)