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Oscar Olson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Pierce-County, Washington
Our Model Tree links this Oscar Olson across the 1910, 1920, 1930 and 1940 US Censuses in Pierce-County, Washington (XGBoost, ~Confirmed), with identified parents Samuel & Anna — first a son (b.~1909), then head of a 4-person household.
Age 31
b. ~1909
Male
Son
Born: Washington
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Pierce-County, Washington |
| Surname | Olson |
| Given Name | Oscar |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Single |
| Birthplace | Washington |
| 1935 Residence (City) | Puyallup C. |
| 1935 Residence (County) | Pierce |
| Additional Details | |
| Occupation | Helper |
| Industry | Farm |
| Class of Worker | PW |
| Hours Worked | 60 |
| Income (1939) | 0 |
| Highest Grade | H-3 |
| 1935 Residence | Same place |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
| Occupation | Helper |
| Township / Ward | Puyallup C |
| Est. Birth Year | ~1909 |
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 |
|---|---|---|---|---|
| Sam Olson | Head | — | 56 | ~1884 |
| Oscar Olson | Son | — | 31 | ~1909 |
| Josef Olson | Son | — | 20 | ~1920 |
| Anna Olson | Spouse | — | 64 | ~1876 |
Census Appearances
1910
Pierce, Washington
Son, age 1
Pierce, Washington · implied b. ~1909 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Olsen |
| Given Name | Oscar |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Washington |
| Father's Birthplace | Norway |
| Mother's Birthplace | Norway |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
1920
Pierce, Washington
Son, age 11
Pierce, Washington · implied b. ~1909 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Olsen |
| Given Name | Oscar |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Washington |
| Father's Birthplace | Norway |
| Mother's Birthplace | Norway |
| Can Read | Yes |
| Can Write | Yes |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
1930
Pierce, Washington
Son, age 21
Pierce, Washington · implied b. ~1909 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Olson |
| Given Name | Oscar |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Washington |
| Father's Birthplace | Norway |
| Mother's Birthplace | Norway |
| Occupation | Laborer |
| Industry | Berry Farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
1940
Pierce-County, Washington
Son, age 31
Pierce-County, Washington · implied b. ~1909 — 4 household members
| Surname | Olson |
| Given Name | Oscar |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Single |
| Birthplace | Washington |
| 1935 Residence (City) | Puyallup C. |
| 1935 Residence (County) | Pierce |
| Occupation | Helper |
| Industry | Farm |
| Class of Worker | PW |
| Hours Worked | 60 |
| Income (1939) | 0 |
| Highest Grade | H-3 |
| 1935 Residence | Same place |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
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 Olson across 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Samuel Olsen (~0.92 confidence) and mother Anna Olsen (~0.92 confidence) and mother Anna Olson (~0.92 confidence) and mother Anna Olsen (~0.92 confidence) and father Sam Olson (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Samuel Olsen
b. ~1874
Source father
● Household
· direct · ~0.92
Mother
Anna Olsen
b. ~1876
Source mother
● Household
· direct · ~0.92
Mother
Anna Olson
b. ~1876
Source mother
● Household
· direct · ~0.92
Mother
Anna Olsen
b. ~1878
Source mother
● Household
· direct · ~0.92
Father
Sam Olson
b. ~1884
Source father
● Household
· direct · ~0.92
This person
Anchor record
Oscar Olson
Son · 1940 · age 31 · b. ~1909 · Washington
★ You are viewing this record
Sibling
Josef Olson
Sibling · 1940 · age 20
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 — Pierce-County, Washington
Open full size
1940 US Federal Census — Pierce-County, Washington
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-04356-00569)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Albert B Johnson | 60 | Head | Cement Finisher | Norway |
| 42 | Anna Johnson | 53 | Wife | — | Norway |
| 43 | William Johnson | 17 | Son | New Worker | Washington |
| 44 | Ishmael Johnson | 33 | Head | Stat. Engr | Wisconsin |
| 45 | Agnes Johnson | 33 | Wife | — | Washington |
| 46 | Lavonne Johnson | 5 | Daughter | — | Washington |
| 47 | Nadine Johnson | 1 | Daughter | — | Washington |
| 48 | Sam Olson | 56 | Head | Farmer | Norway |
| 49 | Anna Olson | 64 | Wife | — | Norway |
| 50 | Oscar Olson THIS PERSON | 31 | Son | Helper | Washington |
| 51 | Josef Olson | 20 | Son | New Worker | Washington |
| 52 | Sigurd Christiansen | 57 | Head | Fisherman | Norway |
| 53 | Emma Christiansen | 55 | Wife | — | Norway |
| 54 | Arnold Christiansen | 21 | Son | Fisherman | Washington |
| 55 | Harold Christiansen | 17 | Son | — | Washington |
| 56 | Florence Christiansen | 14 | Daughter | — | Washington |
| 57 | Olaf Christiansen | 30 | Son | Fisherman | Washington |
| 58 | Edna Christiansen | 21 | D-in-law | — | Washington |
| 59 | Chris Wicks | 67 | Head | Woodcutter | Finland |
| 60 | George Austin | 33 | Head | Laborer | Michigan |
| 61 | Doris Austin | 26 | Wife | — | Washington |
| 62 | Carolyn Austin | 3 | Daughter | — | Washington |
| 63 | Ernest Austin | 25 | Head | Laborer | Washington |
| 64 | Mary Austin | 25 | Wife | Fruit Worker | Washington |
| 65 | Janice Austin | 1 | Daughter | — | Washington |
| 66 | Edith M Delano | 68 | Head | Farmer | Minnesota |
| 67 | Jacob Stelling | 65 | Head | Farmer | Germany |
| 68 | Anna Stelling | 66 | Wife | — | Germany |
| 69 | Walter Stelling | 24 | Son | Salesman | Washington |
| 70 | Robert Stelling | 19 | Son | Laborer | Washington |
| 71 | Peter Stelling | 43 | Head | Farmer | Germany |
| 72 | William Stelling | 25 | Son | Laborer | Washington |
| 73 | Katsuyaro Yamaguchi | 59 | Head | Farmer | Japan |
| 74 | Tomi Yamaguchi | 58 | Wife | — | Japan |
| 75 | Mamoru Yamaguchi | 26 | Son | Farmer | Washington |
| 76 | Masami Yamaguchi | 25 | Daughter | Farmer | Washington |
| 77 | Iwao Yamaguchi | 24 | Son | Farmer | Washington |
| 78 | Setsuko Yamaguchi | 22 | Daughter | Farmer | Washington |
| 79 | Taukaza Horita | 20 | Nephew | Laborer | Washington |
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)