LC
Lillian Clark — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Lillian Clark across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents David & James — first a daughter (b.~1915), then head of a 6-person household.
Age 25
b. ~1915
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Clark |
| Given Name | Lillian |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Harvey City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Sales clerk |
| Industry | Bakery |
| Class of Worker | PW |
| Hours Worked | 36 |
| Income (1939) | 360 |
| Highest Grade | H 3 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Sales Clerk |
| Township / Ward | Harvey City |
| Est. Birth Year | ~1915 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Lillian | Age | Birth yr |
|---|---|---|---|---|
| John Clark | Son | — | 26 | ~1914 |
| Robert Clark | Son | — | 15 | ~1925 |
| Jeanette Clark | Spouse | — | 49 | ~1891 |
| Lillian Clark | Daughter | — | 25 | ~1915 |
| Florence Clark | Daughter | — | 21 | ~1919 |
| David Clark | Head | — | 49 | ~1891 |
Census Appearances
1920
Cook, Illinois
Daughter, age 5
Cook, Illinois · implied b. ~1915 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clarke |
| Given Name | Lillian |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Daughter, age 16
Cook, Illinois · implied b. ~1914 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Lillian |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Daughter, age 25
Cook-County, Illinois · implied b. ~1915 — 6 household members
| Surname | Clark |
| Given Name | Lillian |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Harvey City |
| 1935 Residence (County) | Cook |
| Occupation | Sales clerk |
| Industry | Bakery |
| Class of Worker | PW |
| Hours Worked | 36 |
| Income (1939) | 360 |
| Highest Grade | H 3 |
| 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 Lillian Clark across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father David Clark (~0.92 confidence) and father James Clark (~0.92 confidence) and father Walter Clarke (~0.92 confidence) and mother Alice Clarke (~0.92 confidence) and mother Jeanette Clark (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
David Clark
b. ~1891
Source father
● Household
· direct · ~0.92
Father
James Clark
b. ~1893
Source father
● Household
· direct · ~0.92
Father
Walter Clarke
b. ~1889
Source father
● Household
· direct · ~0.92
Mother
Alice Clarke
b. ~1892
Source mother
● Household
· direct · ~0.92
Mother
Jeanette Clark
b. ~1891
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Lillian Clark
Daughter · 1940 · age 25 · b. ~1915 · Illinois
★ You are viewing this record
Sibling
Robert Clark
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Clark
Sibling · 1940 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Florence Clark
Sibling · 1940 · age 21
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-t0627-00775-00226)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | George H Huston | 47 | Head | Asst Manager | Iowa |
| 2 | Laura E Huston | 46 | Wife | — | Nebraska |
| 3 | Helen E Huston | 11 | Daughter | — | Illinois |
| 4 | Georgia Huston | 4 | Daughter | — | Illinois |
| 5 | Dorothy Eberly | 30 | Head | Teacher | Illinois |
| 6 | James Douglas | 65 | Head | Advisor | Wisconsin |
| 7 | Minnie L Douglas | 63 | Wife | — | Wisconsin |
| 8 | David D Clark | 49 | Head | Painter | Ireland |
| 9 | Jeanette Clark | 49 | Wife | — | Ireland |
| 10 | John Clark | 26 | Son | Laborer | Illinois |
| 11 | Lillian Clark THIS PERSON | 25 | Daughter | Sales Clerk | Illinois |
| 12 | Florence Clark | 21 | Daughter | Maid | Illinois |
| 13 | Robert Clark | 15 | Son | — | Illinois |
| 14 | Charlton Mills | 30 | Head | Mechanic | Ohio |
| 15 | Lillian Mills | 42 | Wife | — | Mississippi |
| 16 | Dorothy Graves | 19 | Daughter | Sales Clerk | Mississippi |
| 17 | Dee Orr | 56 | Head | Labor | Illinois |
| 18 | Edna Orr | 52 | Wife | — | Indiana |
| 19 | William Peck | 74 | Head | Sales Clerk | Wisconsin |
| 20 | Agnes Peck | 72 | Wife | — | Wisconsin |
| 21 | Paul Wallace | 47 | Head | Foreman | Washington |
| 22 | Gladys Wallace | 38 | Wife | — | Nebraska |
| 23 | Donald Wallace | 13 | Son | — | Nebraska |
| 24 | Kenneth Downey | 32 | Brother-in-law | Asst Manager | Nebraska |
| 25 | Rose L. Carrie | 82 | Head | — | Illinois |
| 26 | Louis Thurman | 64 | Head | Carpenter | Michigan |
| 27 | Gertrude Thurman | 58 | Wife | — | Michigan |
| 28 | Minnie Stone | 65 | Head | — | Michigan |
| 29 | James Dantini | 41 | Head | Asst Superintendent | Mississippi |
| 30 | Mary Dantini | 37 | Wife | — | Tennessee |
| 31 | James Jr Dantini | 13 | Son | — | Tennessee |
| 32 | David Dantini | 5 | Son | — | Michigan |
| 33 | Norman P Hobson | 51 | Head | Contractor | South Dakota |
| 34 | Mabel Hobson | 37 | Wife | — | Illinois |
| 35 | Tom Hobson | 15 | Son | — | Illinois |
| 36 | John Hobson | 12 | Son | — | Illinois |
| 37 | Charles Stewart | 65 | Head | Osteopath | Illinois |
| 38 | Emma Stewart | 61 | Wife | — | Missouri |
| 39 | Virginia Stewart | 39 | Daughter | — | Illinois |
| 40 | Frank Stewart | 33 | Son | Cashier | Illinois |
Pedigree Summary
Lillian + 3 siblings
Gen 1 · 5 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)