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Oscar Olson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Eau-Claire-County, Wisconsin
Our Model Tree links this Oscar Olson across the 1920, 1930 and 1940 US Censuses in Eau-Claire-County, Wisconsin (XGBoost, ~Confirmed), with identified parents Oscar & Oscar — first a son (b.~1919), then head of a 6-person household.
Age 21
b. ~1919
Male
Son
Born: Wisconsin
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Eau-Claire-County, Wisconsin |
| Surname | Olson |
| Given Name | Oscar Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Wisconsin |
| 1935 Residence (City) | Eau Claire City |
| 1935 Residence (County) | Eau Claire |
| Additional Details | |
| Occupation | Asst Pharmacist |
| Industry | Drug Co |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 800 |
| Highest Grade | H-4 |
| 1935 Residence | Same House |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
| Occupation | Asst Pharmacist |
| Township / Ward | Eau Claire City |
| 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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Oscar | Age | Birth yr |
|---|---|---|---|---|
| Doris Olson | Daughter | — | 15 | ~1925 |
| Verona Olson | Daughter | — | 18 | ~1922 |
| Oscar Olson | Head | — | 50 | ~1890 |
| Audrey Olson | Son | — | 7 | ~1933 |
| Oscar Olson | Son | — | 21 | ~1919 |
| Anna Olson | Spouse | — | 44 | ~1896 |
Census Appearances
1920
Eau Claire, …
Son, age
Eau Claire, Wisconsin · implied b. ~1920 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Olson |
| Given Name | Oscar Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Wisconsin |
| Father's Birthplace | Wisconsin |
| Mother's Birthplace | Wisconsin |
| Speaks English | Yes |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
1930
Eau Claire, …
Son, age 11
Eau Claire, Wisconsin · implied b. ~1919 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Olson |
| Given Name | Oscar J. Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Wisconsin |
| Father's Birthplace | Wisconsin |
| Mother's Birthplace | Wisconsin |
| Can Read/Write | Yes |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
1940
Eau-Claire-County, Wisconsin
Son, age 21
Eau-Claire-County, Wisconsin · implied b. ~1919 — 6 household members
| Surname | Olson |
| Given Name | Oscar Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Wisconsin |
| 1935 Residence (City) | Eau Claire City |
| 1935 Residence (County) | Eau Claire |
| Occupation | Asst Pharmacist |
| Industry | Drug Co |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 800 |
| Highest Grade | H-4 |
| 1935 Residence | Same House |
| 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 Olson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Oscar Olson (~0.92 confidence) and father Oscar Olson (~0.92 confidence) and mother Anna Olson (~0.92 confidence) and mother Anna Olson (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Oscar Olson
b. ~1890
Source father
● Household
· direct · ~0.92
Father
Oscar Olson
b. ~1890
Source father
● Household
· direct · ~0.92
Mother
Anna Olson
b. ~1891
Source mother
● Household
· direct · ~0.92
Mother
Anna Olson
b. ~1896
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Oscar Olson
Son · 1940 · age 21 · b. ~1919 · Wisconsin
★ You are viewing this record
Sibling
Audrey Olson
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Verona Olson
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Doris Olson
Sibling · 1940 · age 15
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 — Eau-Claire-County, Wisconsin
Open full size
1940 US Federal Census — Eau-Claire-County, Wisconsin
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-04477-00881)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | D. Wayne Emertson | 10 | Daughter | — | Wisconsin |
| 2 | Gloria Emertson | 8 | Daughter | — | Wisconsin |
| 3 | Oscar Olson | 50 | Head | Tire Curer | Wisconsin |
| 4 | Anna Olson | 44 | Wife | — | Wisconsin |
| 5 | Oscar Jr. Olson THIS PERSON | 21 | Son | Asst Pharmacist | Wisconsin |
| 6 | Verona Olson | 18 | Daughter | — | Wisconsin |
| 7 | Doris Olson | 15 | Daughter | — | Wisconsin |
| 8 | Audrey D. Olson | 7 | Son | — | Wisconsin |
| 9 | Allen D. De Mars | 44 | Head | Mailman | Wisconsin |
| 10 | Lyndall De Mars | 36 | Wife | — | Wisconsin |
| 11 | Mary Lynn De Mars | 7 | Daughter | — | Wisconsin |
| 12 | Judith Ann De Mars | 4 | Daughter | — | Wisconsin |
| 13 | H. Kruse | 55 | Head | Telegrapher | Germany |
| 14 | Sophia Kruse | 46 | Wife | — | Minn. |
| 15 | Albert Kruse | 22 | Son | Mill Room Man | Wisconsin |
| 16 | Joseph Kruse | 20 | Son | Delivery Boy | Wisconsin |
| 17 | Lucille Kruse | 16 | Daughter | — | Wisconsin |
| 18 | Hermine Kruse | 8 | Daughter | — | Wisconsin |
| 19 | Morris Frank | 57 | Head | Machinist | Wisconsin |
| 20 | Tresa Frank | 49 | Wife | — | Wisconsin |
| 21 | Rosemary Frank | 19 | Daughter | — | Wisconsin |
| 22 | Frances Frank | 17 | Daughter | — | Wisconsin |
| 23 | Richard Frank | 15 | Son | — | Wisconsin |
| 24 | Bernadine Frank | 9 | Daughter | — | Wisconsin |
| 25 | Harold W. Peterson | 46 | Head | Baker | Illinois |
| 26 | Bertha Peterson | 41 | Wife | — | Norway |
| 27 | Elaine Peterson | 12 | Daughter | — | Wisconsin |
| 28 | Janet Peterson | 5 | Daughter | — | Wisconsin |
| 29 | Albert Appelgren | 41 | Head | Radiator & Body Man | Minn. |
| 30 | Ruby Appelgren | 39 | Wife | — | Wisconsin |
| 31 | Joyce Ann Appelgren | 3 | Daughter | — | Wisconsin |
| 32 | Marilyn Sturm | 12 | Adopted daughter | — | Wisconsin |
| 33 | Edward Glanz | 44 | Head | Tire Builder | Wisconsin |
| 34 | Ella Glanz | 38 | Wife | — | Wisconsin |
| 35 | Lois Glanz | 9 | Daughter | — | Wisconsin |
| 36 | Willard Hoyt | 46 | Head | Salesman | Wisconsin |
| 37 | Jessie Hoyt | 39 | Wife | — | Wisconsin |
| 38 | Hulda Hoyt | 18 | Daughter | — | Wisconsin |
| 39 | Willard Hoyt | 12 | Son | — | Wisconsin |
| 40 | Patricia Hoyt | 11 | Daughter | — | Wisconsin |
Pedigree Summary
Oscar + 3 siblings
Gen 1 · 4 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)