OC
Oscar Carlson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Lake-County, Illinois
Our Model Tree links this Oscar Carlson across the 1910, 1920, 1930 and 1940 US Censuses in Lake-County, Illinois (XGBoost, ~Confirmed), with identified parents Henry & Charlotte — first a head (b.~1890), then head of a 3-person household.
Age 50
b. ~1890
Male
Head
Born: Indiana
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Lake-County, Illinois |
| Surname | Carlson |
| Given Name | Oscar |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Indiana |
| 1935 Residence (City) | Waukegan City |
| 1935 Residence (County) | Lake |
| Additional Details | |
| Occupation | Contractor |
| Industry | Private |
| Class of Worker | OA |
| Hours Worked | 40 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Occupation | Contractor |
| Township / Ward | Waukegan City |
| Est. Birth Year | ~1890 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Oscar | Age | Birth yr |
|---|---|---|---|---|
| Sarah Carlson | Spouse | — | 48 | ~1892 |
| Oscar Carlson | Head | — | 50 | ~1890 |
| Donald Carlson | Son | — | 15 | ~1925 |
Census Appearances
1910
Kane, Illinois
Son, age 21
Kane, Illinois · implied b. ~1889 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carlson |
| Given Name | Oscar |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Carpenter |
| Industry | House work |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1920
Lake, Illinois
Head, age 30
Lake, Illinois · implied b. ~1890 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carlson |
| Given Name | Oscar H |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Indiana |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Carpenter |
| Industry | House |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Swedish |
| Home Owned/Rented | R |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1930
Lake, Illinois
Head, age 40
Lake, Illinois · implied b. ~1890 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carlson |
| Given Name | Oscar |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Indiana |
| Age at First Marriage | 23 |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Carpenter |
| Industry | Building Industry |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 7000 |
| Radio Set | R |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1940
Lake-County, Illinois
Head, age 50
Lake-County, Illinois · implied b. ~1890 — 3 household members
| Surname | Carlson |
| Given Name | Oscar |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Indiana |
| 1935 Residence (City) | Waukegan City |
| 1935 Residence (County) | Lake |
| Occupation | Contractor |
| Industry | Private |
| Class of Worker | OA |
| Hours Worked | 40 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
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 Carlson across 4 US Census years (1910, 1920, 1930 and 1940) in 3 locations, using XGBoost record linkage. Identified parents: father Henry Carlson (~0.92 confidence) and mother Charlotte Carlson (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Henry Carlson
b. ~1849
Source father
● Household
· direct · ~0.92
Mother
Charlotte Carlson
b. ~1856
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Oscar Carlson
Head · 1940 · age 50 · b. ~1890 · 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 — Lake-County, Illinois
Open full size
1940 US Federal Census — Lake-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00831-00492)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | George Glyn | 1 | Son | — | Illinois |
| 2 | Harry Twain | 45 | Head | Barber | Illinois |
| 3 | Lydia Twain | 45 | Wife | — | Wisconsin |
| 4 | William Bratzke | 35 | Head | Auto Mechanic | Wisconsin |
| 5 | Pauline Bratzke | 35 | Wife | — | Wisconsin |
| 6 | William Bratzke | 73 | Father | Telephone Operator | Germany |
| 7 | Oscar Johnson | 48 | Head | Carpenter | Sweden |
| 8 | Agnes Johnson | 44 | Wife | — | Michigan |
| 9 | Oscar Carlson THIS PERSON | 50 | Head | Contractor | Indiana |
| 10 | Sarah Carlson | 48 | Wife | — | Nebraska |
| 11 | Donald Carlson | 15 | Son | — | Illinois |
| 12 | Joseph Smith | 42 | Head | Salesman | England |
| 13 | Florence Smith | 32 | Wife | — | Illinois |
| 14 | Harold Smith | 11 | Son | — | Illinois |
| 15 | Murray Smith | 9 | Son | — | Illinois |
| 16 | Clyde Faucett | 42 | Head | Salesman | Kansas |
| 17 | Bessie M. Faucett | 41 | Wife | — | Massachusetts |
| 18 | Clyde A. Faucett | 15 | Son | — | Illinois |
| 19 | William Ewald | 31 | Head | Physician & Surgeon | Illinois |
| 20 | Ruth Ewald | 25 | Wife | — | Minnesota |
| 21 | Marie Ewald | 0 | Daughter | — | Illinois |
| 22 | E. F. Kittell | 37 | Head | Foreman | Wisconsin |
| 23 | Beatrice Kittell | 36 | Wife | — | Wisconsin |
| 24 | Dee Kittell | 7 | Daughter | — | Illinois |
| 25 | Pauline Johnson | 28 | Wife | — | Illinois |
| 26 | Kathleen Kapel | 33 | Head | Supervisor | England |
| 27 | Barbara Kapel | 17 | Daughter | — | Illinois |
| 28 | James Kapel | 11 | Son | — | Illinois |
| 29 | Emily Cushmore | 57 | Mother | — | England |
| 30 | William Park | 32 | Head | Cashier | Texas |
| 31 | Agnes H. Park | 37 | Wife | Stenographer | Illinois |
| 32 | Kenneth Pettigrew | 26 | Head | Salesman | Illinois |
| 33 | Jean A. Pettigrew | 25 | Wife | — | Illinois |
| 34 | Jean Pettigrew | 1 | Daughter | — | Illinois |
| 35 | Harold Parwell | 42 | Head | Supervisor | Illinois |
| 36 | Alice Parwell | 42 | Wife | — | Illinois |
| 37 | Robert Parwell | 12 | Son | — | Illinois |
| 38 | Daniel Pfeiffer | 44 | Head | Office Mgr. | Illinois |
| 39 | Lorraine Pfeiffer | 43 | Wife | — | Wisconsin |
| 40 | Howard Maatne | 48 | Head | Checker | 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)