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Oscar Olson — 1920 US Census Record
Model Tree available1920 United States Federal Census · Cook, Illinois
Our Model Tree links this Oscar Olson across the 1920, 1930 and 1940 US Censuses in Cook, Illinois (XGBoost, ~Confirmed), with identified parents Hartvig & Hardwig — first a son (b.~1893), then head of a 5-person household.
Age 27
b. ~1893
Male
Son
Born: Illinois
Single
1920 Census Record Details
| Census Year | 1920 |
| Location | Cook, Illinois |
| Surname | Olson |
| Given Name | Oscar |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Norway |
| Mother's Birthplace | Illinois |
| Additional Details | |
| Occupation | Carpenter |
| Industry | House |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Carpenter |
| Township / Ward | City Of 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.
5 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to Oscar | Age | Birth yr |
|---|---|---|---|---|
| Helen Olson | Daughter | — | 21 | ~1899 |
| Mable Olson | Daughter | — | 24 | ~1896 |
| Hardwig Olson | Head | — | 56 | ~1864 |
| Oscar Olson | Son | — | 27 | ~1893 |
| Emma Olson | Spouse | — | 44 | ~1876 |
Census Appearances
1920
Cook, Illinois
Son, age 27
Cook, Illinois · implied b. ~1893 — 5 household members
| Surname | Olson |
| Given Name | Oscar |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Norway |
| Mother's Birthplace | Illinois |
| Occupation | Carpenter |
| Industry | House |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Son, age 38
Cook, Illinois · implied b. ~1892 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Olsen |
| Given Name | Oscar |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Norway |
| Mother's Birthplace | Illinois |
| Occupation | Carpenter |
| Industry | Building construction |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | Yes WW |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Head, age 49
Cook-County, Illinois · implied b. ~1891 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Olsen |
| Given Name | Oscar |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 49 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Occupation | Electrical Repair |
| Industry | Elevator Manufacturer |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1400 |
| Highest Grade | 8 |
| 1935 Residence | Same Place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 Hartvig Olsen (~0.92 confidence) and father Hardwig Olson (~0.92 confidence) and mother Emma Olson (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Hartvig Olsen
b. ~1862
Source father
● Household
· direct · ~0.92
Father
Hardwig Olson
b. ~1864
Source father
● Household
· direct · ~0.92
Mother
Emma Olson
b. ~1876
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Oscar Olson
Son · 1920 · age 27 · b. ~1893 · Illinois
★ You are viewing this record
Sibling
Helen Olson
Sibling · 1920 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mable Olson
Sibling · 1920 · age 24
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
1920 US Federal Census — Cook, Illinois
Open full size
1920 US Federal Census — Cook, Illinois
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu323unit:0419)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | William T. Venta | 45 | Head | Auto Painter | Wisconsin |
| 2 | Louise Venta | 41 | Wife | — | Illinois |
| 3 | Morris Kuhn | 50 | Head | Salesman | Illinois |
| 4 | Mattie Kuhn | 45 | Wife | — | Illinois |
| 5 | Robert Smith | 23 | Head | Clerk | Illinois |
| 6 | Catherine Smith | 22 | Wife | — | Ohio |
| 7 | James M. Smith | 1 | Daughter | — | Illinois |
| 8 | Aquilla Schaffer | 24 | Head | Engineer | Ohio |
| 9 | Caroline Schaffer | 31 | Wife | — | Illinois |
| 10 | Evelyn L. Schaffer | 1 | Daughter | — | Illinois |
| 11 | Louis H. Henner | 40 | Head | Switchman | Missouri |
| 12 | Mable Henner | 33 | Wife | — | Illinois |
| 13 | John E. Vanselow | 29 | Head | Engineer | Indiana |
| 14 | Ella Vanselow | 25 | Wife | — | Illinois |
| 15 | Mary Lennon | 49 | Head | — | Ireland |
| 16 | Elizabeth Lennon | 25 | Daughter | Stenographer | Illinois |
| 17 | Francis Lennon | 23 | Son | Brakeman | Illinois |
| 18 | Margaret Lennon | 18 | Daughter | Typist | Illinois |
| 19 | John Rhodes | 58 | Head | Packer | Indiana |
| 20 | Zeta Rhodes | 57 | Wife | — | Indiana |
| 21 | Russell Phillips | 25 | Son-in-law | Switchman | Indiana |
| 22 | Hope Phillips | 16 | Daughter | Waitress | Indiana |
| 23 | — | None | — | — | — |
| 24 | Walter J. Zidron | 29 | Head | Clerk | Hungary |
| 25 | Elizabeth Zidron | 20 | Wife | — | New York |
| 26 | Elinor Zidron | 2 | Daughter | — | Illinois |
| 27 | Martin Zidron | 0 | Son | — | Illinois |
| 28 | James Dortrella | 32 | Head | Mechanic | Illinois |
| 29 | Lucille Dortrella | 30 | Wife | — | Illinois |
| 30 | Andrew Cusimano | 54 | Head | Laborer | Italy |
| 31 | Spallina Cusimano | 38 | Wife | — | Italy |
| 32 | Philip Cusimano | 18 | Son | Shoe Polish | Wisconsin |
| 33 | Annie Cusimano | 16 | Daughter | Cleaner | Illinois |
| 34 | Joseph Cusimano | 12 | Son | — | Illinois |
| 35 | Vincent Cusimano | 11 | Son | — | Illinois |
| 36 | Carmela Cusimano | 9 | Daughter | — | Illinois |
| 37 | Nelson Cusimano | 6 | Son | — | Illinois |
| 38 | Frank Cusimano | 3 | Son | — | Illinois |
| 39 | Hardwig Olson | 56 | Head | Carpenter | Norway |
| 40 | Emma Olson | 44 | Wife | — | Illinois |
| 41 | Oscar Olson THIS PERSON | 27 | Son | Carpenter | Illinois |
| 42 | Mable Olson | 24 | Daughter | Clerk | Illinois |
| 43 | Helen Olson | 21 | Daughter | Stenographer | Illinois |
| 44 | Walter H. Barrett | 31 | Head | Engineer | Illinois |
| 45 | Ada M. Barrett | 28 | Wife | — | Michigan |
| 46 | Walter K. Barrett | 5 | Son | — | Illinois |
| 47 | Dorothy E. Barrett | 1 | Daughter | — | Illinois |
| 48 | Olaf Jacobson | 72 | Head | None | Denmark |
| 49 | Inga Jacobson | 36 | Daughter | Waitress | Illinois |
| 50 | Alfred Thorsen | 26 | Head | Supt. | Illinois |
Pedigree Summary
Oscar + 2 siblings
Gen 1 · 3 parents
~0.92
Max depth 4 (1900–1950 window)
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1920 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)