OS
Oscar Swanson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Lemhi-County, Idaho
Our Model Tree links this Oscar Swanson across the 1920, 1930 and 1940 US Censuses in Lemhi-County, Idaho (XGBoost, ~Confirmed), with identified parents Gus & Hulda — first a head (b.~1912), then head of a 6-person household.
Age 28
b. ~1912
Male
Head
Born: Idaho
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Lemhi-County, Idaho |
| Surname | Swanson |
| Given Name | Oscar W. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Idaho |
| 1935 Residence (City) | Junction Precinct |
| 1935 Residence (County) | Lemhi |
| Additional Details | |
| Occupation | Laborer |
| Industry | Hay Ranch |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 473 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Idaho |
| Birth Country | United States |
| Birthplace (normalized) | idaho |
| Occupation | Laborer |
| Township / Ward | Junction Precinct |
| Est. Birth Year | ~1912 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Oscar | Age | Birth yr |
|---|---|---|---|---|
| James Hill | Other | — | 7 | ~1933 |
| Robert Hill | Other | — | 3 | ~1937 |
| Barbara Swanson | Daughter | — | ~1940 | |
| Oscar Swanson | Head | — | 28 | ~1912 |
| George Swanson | Other | — | 15 | ~1925 |
| Mildred Swanson | Spouse | — | 25 | ~1915 |
Census Appearances
1920
Lemhi, Idaho
Son, age 7
Lemhi, Idaho · implied b. ~1913 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Swanson |
| Given Name | Oscar W. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Idaho |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Birth State | Idaho |
| Birth Country | United States |
| Birthplace (normalized) | idaho |
1930
Lemhi, Idaho
Other, age 18
Lemhi, Idaho · implied b. ~1912 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Swanson |
| Given Name | Oscar W. |
| Relationship to Head | brother |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Idaho |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Laborer |
| Industry | Sheep Ranch |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Idaho |
| Birth Country | United States |
| Birthplace (normalized) | idaho |
1940
Lemhi-County, Idaho
Head, age 28
Lemhi-County, Idaho · implied b. ~1912 — 6 household members
| Surname | Swanson |
| Given Name | Oscar W. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Idaho |
| 1935 Residence (City) | Junction Precinct |
| 1935 Residence (County) | Lemhi |
| Occupation | Laborer |
| Industry | Hay Ranch |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 473 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Idaho |
| Birth Country | United States |
| Birthplace (normalized) | idaho |
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 Swanson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Gus Swanson (~0.92 confidence) and mother Hulda Swanson (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Gus Swanson
b. ~1884
Source father
● Household
· direct · ~0.92
Mother
Hulda Swanson
b. ~1885
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Oscar Swanson
Head · 1940 · age 28 · b. ~1912 · Idaho
★ 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 — Lemhi-County, Idaho
Open full size
1940 US Federal Census — Lemhi-County, Idaho
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-00750-00176)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | William Dozina | 62 | Head | Laborer | Washington |
| 42 | Amanda S. Dozina | 52 | Wife | — | Idaho |
| 43 | Alvin Jude Dozina | 25 | Son | Laborer | Idaho |
| 44 | Leslie R. Dozina | 22 | Son | Laborer | Idaho |
| 45 | George Henry Crowe | 33 | Head | Laborer | Washington |
| 46 | Gladys Sylvia Crowe | 27 | Wife | — | Idaho |
| 47 | Gayle Leland Crowe | 2 | Son | — | Idaho |
| 48 | Velda Jean Crowe | 0 | Daughter | — | Idaho |
| 49 | William Robert Keating | 66 | Head | Merchant | Minnesota |
| 50 | Elmer A. Benson | 27 | Lodger | Engineer | Maine |
| 51 | Jordan Myers | 48 | Lodger | Laborer | Nebraska |
| 52 | John A. Kern | 57 | Lodger | Clerk | Nebraska |
| 53 | Roland H. Davidson | 56 | Head | Merchant | Arkansas |
| 54 | Julia Davidson | 45 | Wife | — | Kansas |
| 55 | Thomas J. Davidson | 23 | Son | Laborer | Idaho |
| 56 | Frank Elmer Norton | 39 | Head | Laborer | Idaho |
| 57 | Lena Louise Norton | 37 | Wife | — | Utah |
| 58 | Frank Elmer Jr. Norton | 19 | Son | Laborer | Idaho |
| 59 | Clayton Harry Norton | 14 | Son | — | Washington |
| 60 | Barbara Delene Norton | 4 | Daughter | — | Idaho |
| 61 | Kenneth R. Wilson | 29 | Head | Laborer | Idaho |
| 62 | Ruth Belle Wilson | 26 | Wife | — | Montana |
| 63 | Robert Ray Wilson | 3 | Son | — | Idaho |
| 64 | Sandra Ann Wilson | 2 | Daughter | — | Idaho |
| 65 | Sharon Ellen Wilson | 1 | Daughter | — | Idaho |
| 66 | The Operator Of This Farm Was Taken At Salmon In The Brooklyn Precinct By Robert Simmonds | None | — | — | — |
| 67 | Philip Aug. Lofas | 66 | Head | Farmer | Idaho |
| 68 | Ida Anna Lofas | 53 | Wife | — | Nebraska |
| 69 | Oscar W. Swanson THIS PERSON | 28 | Head | Laborer | Idaho |
| 70 | Mildred E. Swanson | 25 | Wife | — | Kansas |
| 71 | James Willis Hill | 7 | Step-son | — | Montana |
| 72 | Robert Gayle Hill | 3 | Step-son | — | Idaho |
| 73 | Barbara Jean Swanson | 0 | Daughter | — | Idaho |
| 74 | George Jr. Swanson | 15 | Brother | — | Idaho |
| 75 | Jacob Albert Hayes | 51 | Head | Farmer | Idaho |
| 76 | Rosella Hayes | 49 | Wife | — | Idaho |
| 77 | Frank Albert Hayes | 22 | Son | Miner | Idaho |
| 78 | William Robert Hayes | 19 | Son | — | Idaho |
| 79 | Abbott W. Chase | 32 | Head | Farmer | Iowa |
Pedigree Summary
Oscar
Gen 1 · 2 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)