CJ
Carol Johnson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Carol Johnson across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a daughter (b.~1930), then head of a 4-person household.
Age 10
b. ~1930
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Johnson |
| Given Name | Carol R. |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | No 5 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1930 |
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 Carol | Age | Birth yr |
|---|---|---|---|---|
| Oscar Johnson | Head | — | 38 | ~1902 |
| Carol Johnson | Daughter | — | 10 | ~1930 |
| Fred Johnson | Son | — | 1 | ~1939 |
| Myrtle Johnson | Spouse | — | 32 | ~1908 |
Census Appearances
1930
Cook, Illinois
Daughter, age
Cook, Illinois · implied b. ~1930 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Carol Ruth |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Daughter, age 10
Cook-County, Illinois · implied b. ~1930 — 4 household members
| Surname | Johnson |
| Given Name | Carol R. |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Class of Worker | 0 |
| Highest Grade | No 5 |
| 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 Carol Johnson across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Carol Johnson
Daughter · 1940 · age 10 · b. ~1930 · Illinois
★ You are viewing this record
Sibling
Fred Johnson
Sibling · 1940 · age 1
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-t0627-00999-00625)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Patricia A. Mallory | 3 | daughter | — | Illinois |
| 2 | Harry J. Mallory | 1 | son | — | Illinois |
| 3 | Charles Nilsen | 37 | Head | Operator | Illinois |
| 4 | Henry Schmidt | 74 | Father | — | Germany |
| 5 | Lawrence Schmidt | 32 | Head | Salesman | Illinois |
| 6 | Clara Schmidt | 29 | Wife | — | Illinois |
| 7 | Alice L. Schmidt | 8 | daughter | — | Illinois |
| 8 | Marianne Schmidt | 4 | daughter | — | Illinois |
| 9 | Carl A. Swanson | 62 | Head | Janitor | Sweden |
| 10 | Hildur N. Swanson | 45 | Servant | Housekeeper | Illinois |
| 11 | Edward Johnson | 40 | Head | Cable Man | Illinois |
| 12 | Catherine Johnson | 38 | Wife | — | Illinois |
| 13 | Lawrence Johnson | 12 | son | — | Illinois |
| 14 | Edward J. Johnson | 9 | son | — | Illinois |
| 15 | Robert C. Johnson | 4 | son | — | Illinois |
| 16 | James F. Donovan | 70 | Head | Electrician | Irish Free State |
| 17 | Josephine Donovan | 69 | Wife | — | Irish Free State |
| 18 | Josephine T. Donovan | 26 | daughter | Stenographer | Illinois |
| 19 | James F. Donovan | 24 | son | General Office Clerk | Illinois |
| 20 | Thomas J. Donovan | 18 | son | — | Illinois |
| 21 | Eileen Donovan | 20 | daughter | Stenographer | Illinois |
| 22 | Mary A. Donovan | 17 | daughter | — | Illinois |
| 23 | Oscar E. Johnson | 38 | Head | Mill Hand | Illinois |
| 24 | Myrtle A. Johnson | 32 | Wife | — | Illinois |
| 25 | Carol R. Johnson THIS PERSON | 10 | daughter | — | Illinois |
| 26 | Fred O. Johnson | 1 | son | — | Illinois |
| 27 | William A. Johnson | 60 | Head | Mail Carrier | Sweden |
| 28 | Pauline M. Johnson | 58 | Wife | — | Sweden |
| 29 | Gordon L. Pouliot | 42 | Head | Automobile Tester | Minnesota |
| 30 | Ruth E. Pouliot | 39 | Wife | — | Illinois |
| 31 | Gordon L. Jr. Pouliot | 12 | son | — | Illinois |
| 32 | John D. Pouliot | 9 | son | — | Michigan |
| 33 | Deborah M. Pouliot | 5 | daughter | — | Illinois |
| 34 | Earl L. Gillie | 30 | Head | Watch Maker | Illinois |
| 35 | Pauline M. Gillie | 25 | Wife | Gen Office Work | Iowa |
| 36 | John V. Daum | 31 | Head | Maintenance Man | Illinois |
| 37 | Elsie Daum | 31 | Wife | — | Austria |
| 38 | Carol K. Daum | 7 | daughter | — | Illinois |
| 39 | Jacqueline Daum | 5 | daughter | — | Illinois |
| 40 | John Mueller | 47 | Head | Tool Maker | Austria |
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)