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 1910, 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Olaf & Ida — first a head (b.~1895), then head of a 5-person household.
Age 45
b. ~1895
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Swanson |
| Given Name | Oscar A. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Insurance Agent |
| Industry | Life Insurance Co. |
| Class of Worker | OA |
| Hours Worked | 50 |
| Income (1939) | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Insurance Agent |
| Township / Ward | Chicago |
| Est. Birth Year | ~1895 |
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 1940 census.
| Name | Relation to head | Relative to Oscar | Age | Birth yr |
|---|---|---|---|---|
| Alice Swanson | Other | — | 43 | ~1897 |
| Carolyn Swanson | Daughter | — | 8 | ~1932 |
| Edith Swanson | Spouse | — | 40 | ~1900 |
| John Swanson | Other | — | 77 | ~1863 |
| Oscar Swanson | Head | — | 45 | ~1895 |
Census Appearances
1910
Cook, Illinois
Other, age 15
Cook, Illinois · implied b. ~1895 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Swenson |
| Given Name | Oscar |
| Relationship to Head | Brother |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 W |
| 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 | Merchant |
| Industry | Retail Groceries |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Head, age 35
Cook, Illinois · implied b. ~1895 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Swanson |
| Given Name | Oscar A. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 32 |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Builder |
| Industry | Homes |
| Class of Worker | E |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 32000 |
| Radio Set | R |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Head, age 45
Cook-County, Illinois · implied b. ~1895 — 5 household members
| Surname | Swanson |
| Given Name | Oscar A. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Occupation | Insurance Agent |
| Industry | Life Insurance Co. |
| Class of Worker | OA |
| Hours Worked | 50 |
| Income (1939) | 0 |
| Highest Grade | Hs 4 |
| 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 Swanson across 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Olaf Swanson (~0.92 confidence) and mother Ida Swanson (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Olaf Swanson
b. ~1863
Source father
● Household
· direct · ~0.92
Mother
Ida Swanson
b. ~1860
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Oscar Swanson
Head · 1940 · age 45 · b. ~1895 · Illinois
★ 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 — 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-t0627-00959-00534)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Elmer Nielsen | 40 | Head | Salesman | Illinois |
| 42 | Dorothy Nielsen | 26 | Wife | — | Illinois |
| 43 | Lillian Versailles | 53 | Mother-in-law | — | Illinois |
| 44 | Roy F. Morris | 37 | Head | Broker Dept. | Illinois |
| 45 | Ruth E. Morris | 31 | Wife | Insurance Clerk | Illinois |
| 46 | Oscar A. Swanson THIS PERSON | 45 | Head | Insurance Agent | Illinois |
| 47 | Edith Swanson | 40 | Wife | — | Illinois |
| 48 | Carolyn Swanson | 8 | Daughter | — | Illinois |
| 49 | John A. Swanson | 77 | Father | — | Sweden |
| 50 | Alice E. Swanson | 43 | Sister | — | Illinois |
| 51 | Gottfried Peterson | 56 | Head | Maintenance & Carpenter | Sweden |
| 52 | Esther Peterson | 50 | Wife | — | Illinois |
| 53 | Charles Mickelberry | 53 | Head | Cafe Manager | Georgia |
| 54 | Nellie Mickelberry | 53 | Wife | — | Indiana |
| 55 | William J. Lowitz | 33 | Head | Salesman | Indiana |
| 56 | Eleanor Lowitz | 31 | Daughter | — | Illinois |
| 57 | Marjorie Lowitz | 5 | Granddaughter | — | Illinois |
| 58 | John A. Moreau | 46 | Head | Insurance Real Estate | Illinois |
| 59 | Edna Moreau | 46 | Wife | — | Illinois |
| 60 | Betty June Moreau | 19 | Daughter | Stenographer | Illinois |
| 61 | John A. Moreau | 17 | Son | — | Illinois |
| 62 | Dennis A. Flynn | 63 | Head | Salesman | Illinois |
| 63 | Sadie Flynn | 60 | Wife | — | Illinois |
| 64 | John T. Flynn | 25 | Son | Guide | Illinois |
| 65 | Elmer Edman | 41 | Head | Executive | Illinois |
| 66 | Victorine Edman | 41 | Wife | — | Illinois |
| 67 | Evelyn Edman | 4 | Daughter | — | Illinois |
| 68 | William C. Boyer | 50 | Head | Dist. Claim Agent | Maryland |
| 69 | Ora L. Boyer | 51 | Wife | — | Virginia |
| 70 | Kathryn Boyer | 72 | Mother | — | Maryland |
| 71 | Harold C. Mckinley | 28 | Head | Dept. Manager | Nebraska |
| 72 | Kathryn Mckinley | 28 | Wife | — | Nebraska |
| 73 | James Mckinley | 4 | Son | — | Nebraska |
| 74 | Frank G. Mckay | 39 | Head | Commercial Agent | Canada English |
| 75 | Agnes Mckay | 37 | Wife | — | Illinois |
| 76 | Joane Mckay | 9 | Daughter | — | Illinois |
| 77 | Frank Mckay | 6 | Son | — | Illinois |
| 78 | S. Bertram Stearn | 37 | Head | Salesman | Indiana |
| 79 | Jean Stearn | 36 | Wife | — | Ohio |
| 80 | Janet Stearn | 8 | Daughter | — | Illinois |
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)