OS
Oscar Swanson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Oscar Swanson across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Otto & Clara — first a son (b.~1896), then head of a 4-person household.
Age 44
b. ~1896
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Swanson |
| Given Name | Oscar |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 44 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Illinois |
| Additional Details | |
| Occupation | Clerk |
| Industry | I. C. Railroad |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 2288 |
| Highest Grade | Hs 4 |
| 1935 Residence | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Clerk |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1896 |
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 |
|---|---|---|---|---|
| Oscar Swanson | Son | — | 44 | ~1896 |
| Clarence Swanson | Son | — | 35 | ~1905 |
| Bealene Swanson | Other | — | 39 | ~1901 |
| Clara Swanson | Head | — | 77 | ~1863 |
Census Appearances
1920
Cook, Illinois
Son, age 24
Cook, Illinois · implied b. ~1896 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Swanson |
| Given Name | Oscar J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Clerk |
| Industry | Drug Store |
| 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 35
Cook, Illinois · implied b. ~1895 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Swanson |
| Given Name | Oscar A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Clerk |
| Industry | Railroad |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 44
Cook-County, Illinois · implied b. ~1896 — 4 household members
| Surname | Swanson |
| Given Name | Oscar |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 44 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Illinois |
| Occupation | Clerk |
| Industry | I. C. Railroad |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 2288 |
| Highest Grade | Hs 4 |
| 1935 Residence | Illinois |
| 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 Swanson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Otto Swanson (~0.92 confidence) and mother Clara Swanson (~0.92 confidence) and mother Julia Swanson (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Otto Swanson
b. ~1852
Source father
● Household
· direct · ~0.92
Mother
Clara Swanson
b. ~1863
Source mother
● Household
· direct · ~0.92
Mother
Julia Swanson
b. ~1862
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Oscar Swanson
Son · 1940 · age 44 · b. ~1896 · Illinois
★ You are viewing this record
Sibling
Clarence Swanson
Sibling · 1940 · age 35
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 — Cook-County, Illinois
Open full size
1940 US Federal Census — Cook-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00936-00296)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Helen Sayre | 44 | Wife | — | Iowa |
| 2 | Roger Sayre | 21 | Son | Laborer | Iowa |
| 3 | Robert Sayre | 14 | Son | New Worker | Iowa |
| 4 | David Johnson | 51 | Head | Milk Delivery Man | Sweden |
| 5 | Esther Johnson | 47 | Wife | — | Sweden |
| 6 | Margaret Johnson | 19 | Daughter | Stenographer | Illinois |
| 7 | Block 5 Here Ends | None | and begins | — | — |
| 8 | Clara Swanson | 77 | Head | — | Sweden |
| 9 | Oscar Swanson THIS PERSON | 44 | Son | Clerk | Illinois |
| 10 | Bealene Swanson | 39 | Daughter in law | Clerk | Missouri |
| 11 | Clarence Swanson | 35 | Son | Clerical | Illinois |
| 12 | Josephine Bauer | 41 | Head | — | Wisconsin |
| 13 | Edward Bauer | 46 | Husband | Foreman | Illinois |
| 14 | Edward Jr Bauer | 19 | Son | Office Work | Illinois |
| 15 | John Smurdon | 49 | Lodger | Horseman | Illinois |
| 16 | Wm Smurdon | 20 | Lodger | — | Illinois |
| 17 | Howard Henry | 42 | Head | Police Officer | Illinois |
| 18 | Mary Henry | 38 | Wife | — | Illinois |
| 19 | Frances Henry | 11 | Daughter | — | Illinois |
| 20 | Catherine Henry | 10 | Daughter | — | Illinois |
| 21 | Catherine Carmody | 70 | Mother in law | — | New York |
| 22 | Wm F Merkle | 69 | Head | Mgr Trap Shooting | Illinois |
| 23 | Lena Merkle | 68 | Wife | — | Illinois |
| 24 | Raymond Merkle | 24 | Son | Clerical | Illinois |
| 25 | Daisy Merkle | 24 | Daughter in law | — | Illinois |
| 26 | Fred Nelson | 62 | Head | Electrician | Sweden |
| 27 | Jennie Nelson | 59 | Wife | — | Sweden |
| 28 | Olga Benik | 54 | Head | — | Germany |
| 29 | Wm Benik | 27 | Son | Inspector | Illinois |
| 30 | Edith Knall | 47 | Head | — | Illinois |
| 31 | Wilson Knall | 21 | Son | Apprentice | Illinois |
| 32 | Lars Nelson | 54 | Head | Chief Clerk | Norway |
| 33 | Annette Nelson | 43 | Wife | — | Illinois |
| 34 | Edith Harris | 74 | Mother | — | Germany |
| 35 | Charles Weber | 52 | Head | Foreman | Michigan |
| 36 | Margaret Weber | 46 | Wife | — | Illinois |
| 37 | Charlene Weber | 10 | Daughter | — | Illinois |
| 38 | Myer Becker | 43 | Lodger | Laborer | Illinois |
| 39 | Emily Becker | 43 | Lodger | — | Illinois |
| 40 | Anthony Nommensen | 68 | Head | Stationary Engineer | Illinois |
Pedigree Summary
Oscar + 1 sibling
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 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)