JC
John Carlson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this John Carlson across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Esther & Edwin — first a son (b.~1917), then head of a 3-person household.
Age 23
b. ~1917
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Carlson |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Draftsman |
| Industry | Plumbing |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 780 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same Place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Draftsman |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1917 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Edmund Carlson | Head | — | 54 | ~1886 |
| John Carlson | Son | — | 23 | ~1917 |
| Esther Carlson | Spouse | — | 54 | ~1886 |
Census Appearances
1920
Cook, Illinois
Son, age 2
Cook, Illinois · implied b. ~1918 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carlson |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Sweden |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Son, age 13
Cook, Illinois · implied b. ~1917 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carlson |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Sweden |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 23
Cook-County, Illinois · implied b. ~1917 — 3 household members
| Surname | Carlson |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Occupation | Draftsman |
| Industry | Plumbing |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 780 |
| 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 John Carlson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Esther Carlson (~0.92 confidence) and father Edwin Carlson (~0.92 confidence) and father Edward Carlson (~0.92 confidence) and father Edmund Carlson (~0.92 confidence) and mother Esther Carlson (~0.92 confidence) and mother Esther Carlson (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Esther Carlson
b. ~1883
Source mother
● Household
· direct · ~0.92
Father
Edwin Carlson
b. ~1886
Source father
● Household
· direct · ~0.92
Father
Edward Carlson
b. ~1886
Source father
● Household
· direct · ~0.92
Father
Edmund Carlson
b. ~1886
Source father
● Household
· direct · ~0.92
Mother
Esther Carlson
b. ~1886
Source mother
● Household
· direct · ~0.92
Mother
Esther Carlson
b. ~1886
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Carlson
Son · 1940 · age 23 · b. ~1917 · 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-t0627-01023-00874)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Jerry Hirsch | 12 | Head | — | Illinois |
| 2 | Benjamin Stane | 73 | Lodger | — | Lithuania |
| 3 | Edmund Carlson | 54 | Head | Milk Wagon | Sweden |
| 4 | Esther Carlson | 54 | Wife | — | Sweden |
| 5 | John Carlson THIS PERSON | 23 | Son | Draftsman | Illinois |
| 6 | Wm H. Chute | 54 | Head | Lease Agent | Iowa |
| 7 | Catherine Chute | 48 | Wife | — | Illinois |
| 8 | Virginia Chute | 24 | Daughter | Typist | Illinois |
| 9 | Earle Maerlie | 57 | Head | Research Engineer | Ohio |
| 10 | Patricia Maerlie | 41 | Wife | — | Indiana |
| 11 | Leo L. O'Grady | 35 | Head | Dept Manager | Illinois |
| 12 | Emily E. O'Grady | 32 | Wife | — | Wisconsin |
| 13 | Russell Jun O'Grady | 8 | Son | — | Illinois |
| 14 | Daniel Peterson | 35 | Head | Dentist | No Dakota |
| 15 | Marjorie Peterson | 31 | Wife | — | Illinois |
| 16 | Marjorie Peterson | 9 | Daughter | — | Illinois |
| 17 | Susan Peterson | 4 | Daughter | — | Illinois |
| 18 | L. Ray Anderson | 36 | Head | Accountant | Illinois |
| 19 | Lydia Anderson | 34 | Wife | — | Illinois |
| 20 | Oral Anderson | 9 | Daughter | — | Illinois |
| 21 | Lynn Latta | 29 | Head | Lawyer | Iowa |
| 22 | Frances Latta | 23 | Wife | — | Iowa |
| 23 | David Latta | 4 | Son | — | Ohio |
| 24 | Robert Latta | 2 | Son | — | Illinois |
| 25 | Phillip Warner | 31 | Head | Musician | Illinois |
| 26 | Viola Warner | 28 | Wife | — | Iowa |
| 27 | Frederick Warner | 6 | Son | — | Illinois |
| 28 | Richard Kuehlmann | 37 | Head | Service Man | Illinois |
| 29 | Gertrude Kuehlmann | 47 | Wife | — | Illinois |
| 30 | Donald Kuehlmann | 10 | Son | — | Illinois |
| 31 | Marilyn Kuehlmann | 4 | Daughter | — | Illinois |
| 32 | Charlotte Kuehlmann | 4 | Daughter | — | Illinois |
| 33 | Max Shipley | 38 | Head | Typesetter | Indiana |
| 34 | Mildred Shipley | 36 | Wife | — | Illinois |
| 35 | Dick Shipley | 10 | Son | — | Illinois |
| 36 | Barbara Shipley | 6 | Daughter | — | Illinois |
| 37 | Joseph Iacoani | 52 | Head | Proprietor | Illinois |
| 38 | Marie Iacoani | 43 | Wife | — | Illinois |
| 39 | Marilyn Iacoani | 8 | Daughter | — | Illinois |
| 40 | Joseph Jr Iacoani | 16 | Son | — | Illinois |
Pedigree Summary
John
Gen 1 · 6 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)