LJ
Leslie Johnson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Leslie Johnson across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Gus & Amanda — first a head (b.~1908), then head of a 3-person household.
Age 32
b. ~1908
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Johnson |
| Given Name | Leslie |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Elevator Constructor |
| Industry | Elevator Co. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 336 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Elevator Constructor |
| Township / Ward | Chicago |
| Est. Birth Year | ~1908 |
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 Leslie | Age | Birth yr |
|---|---|---|---|---|
| Leslie Johnson | Head | — | 32 | ~1908 |
| Gloria Johnson | Daughter | — | 7 | ~1933 |
| Elsie Johnson | Spouse | — | 31 | ~1909 |
Census Appearances
1920
Cook, Illinois
Son, age 12
Cook, Illinois · implied b. ~1908 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Leslie |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Son, age 22
Cook, Illinois · implied b. ~1908 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Leslie |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Clerk |
| Industry | Govt. Co. |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Head, age 32
Cook-County, Illinois · implied b. ~1908 — 3 household members
| Surname | Johnson |
| Given Name | Leslie |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Occupation | Elevator Constructor |
| Industry | Elevator Co. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 336 |
| 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 Leslie Johnson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Gus Johnson (~0.92 confidence) and mother Amanda Johnson (~0.92 confidence) and mother Jennie Johnson (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Gus Johnson
b. ~1878
Source father
● Household
· direct · ~0.92
Mother
Amanda Johnson
b. ~1874
Source mother
● Household
· direct · ~0.92
Mother
Jennie Johnson
b. ~1881
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Leslie Johnson
Head · 1940 · age 32 · b. ~1908 · 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-t0627-01015-00084)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Mary Rehkopf | 37 | Head | Manager | Russia |
| 42 | Anna Rehkopf | 61 | Mother | — | Italy |
| 43 | Leo Rehkopf | 33 | Brother | Typist | Wisconsin |
| 44 | Louis Prees | 36 | Head | Salesman | Russia |
| 45 | Frieda Prees | 29 | Wife | — | Poland |
| 46 | Erwin Prees | 2 | Son | — | Illinois |
| 47 | Stuart Mills | 28 | Head | Salesman | New York |
| 48 | Leona Mills | 30 | Wife | Stenographer | Illinois |
| 49 | Vincent Bartak | 30 | Head | Truck Driver | Illinois |
| 50 | Tessibel Bartak | 23 | Wife | — | Indiana |
| 51 | Leslie Johnson THIS PERSON | 32 | Head | Elevator Constructor | Illinois |
| 52 | Elsie Johnson | 31 | Wife | — | Illinois |
| 53 | Gloria Johnson | 7 | Daughter | — | Illinois |
| 54 | Alex E. Isaacson | 45 | Head | Coal Merchant | New York |
| 55 | Ethel Isaacson | 40 | Wife | — | Illinois |
| 56 | Lois Wolf | 15 | Daughter | — | Illinois |
| 57 | Bruce S. Isaacson | 12 | Son | — | Illinois |
| 58 | Marcus Hokanson | 26 | Head | Commercial Artist | Wisconsin |
| 59 | Roberta Hokanson | 21 | Wife | — | West Virginia |
| 60 | Judith Hokanson | 1 | Daughter | — | Illinois |
| 61 | Viola Carter | 39 | Head | — | Illinois |
| 62 | Viola M. Carter | 13 | Daughter | — | Illinois |
| 63 | Patricia A. Carter | 10 | Daughter | — | Illinois |
| 64 | Ernest E. Ambrosen | 41 | Head | Bookkeeper | Sweden |
| 65 | Esther Ambrosen | 40 | Wife | Hairdresser | Sweden |
| 66 | George Unger | 35 | Head | Clerk | Illinois |
| 67 | Mildred Unger | 31 | Wife | Stenographer | Illinois |
| 68 | Richard I. Cass | 33 | Head | Accountant | Illinois |
| 69 | Lillian Cass | 36 | Wife | — | Illinois |
| 70 | Richard T. Cass | 10 | Son | — | Illinois |
| 71 | Bernard Merkle | 47 | Head | Vice President | Illinois |
| 72 | Mable Merkle | 43 | Wife | — | Colorado |
| 73 | Frank C. Pundt | 55 | Head | Salesman | Illinois |
| 74 | Florence A. Pundt | 45 | Wife | Saleslady | Illinois |
| 75 | Gustaf Anderson | 39 | Head | Tester | Sweden |
| 76 | Anna Anderson | 39 | Wife | — | Sweden |
| 77 | John Anderson | 8 | Son | — | Illinois |
| 78 | Karl Wheeler | 26 | Head | Engineer | Ohio |
| 79 | Gayle Wheeler | 24 | Wife | — | Nebraska |
| 80 | Karen Wheeler | 0 | Daughter | — | Nebraska |
Pedigree Summary
Leslie
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)