JS
Jack Smith — 1940 US Census Record
Model Tree available1940 United States Federal Census · Kane-County, Illinois
Our Model Tree links this Jack Smith across the 1920, 1930 and 1940 US Censuses in Kane-County, Illinois (XGBoost, ~Confirmed), with identified parents John & Jean — first a son (b.~1916), then head of a 4-person household.
Age 24
b. ~1916
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Kane-County, Illinois |
| Surname | Smith |
| Given Name | Jack |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Aurora City |
| 1935 Residence (County) | Kane |
| Additional Details | |
| Occupation | Salesman |
| Industry | Typewriters |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 200 |
| Highest Grade | C-4 |
| 1935 Residence | Same house |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Salesman |
| Township / Ward | Aurora City |
| Est. Birth Year | ~1916 |
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 Jack | Age | Birth yr |
|---|---|---|---|---|
| John Smith | Head | — | 58 | ~1882 |
| Gordon Smith | Son | — | 26 | ~1914 |
| Jack Smith | Son | — | 24 | ~1916 |
| Jean Smith | Spouse | — | 57 | ~1883 |
Census Appearances
1920
Kane, Illinois
Son, age 4
Kane, Illinois · implied b. ~1916 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | Jack |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Kane, Illinois
Son, age 14
Kane, Illinois · implied b. ~1916 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | Jack A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Kane-County, Illinois
Son, age 24
Kane-County, Illinois · implied b. ~1916 — 4 household members
| Surname | Smith |
| Given Name | Jack |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Aurora City |
| 1935 Residence (County) | Kane |
| Occupation | Salesman |
| Industry | Typewriters |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 200 |
| Highest Grade | C-4 |
| 1935 Residence | Same house |
| 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 Jack Smith across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Smith (~0.92 confidence) and mother Jean Smith (~0.92 confidence) and mother Jeanie Smith (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Smith
b. ~1883
Source father
● Household
· direct · ~0.92
Mother
Jean Smith
b. ~1883
Source mother
● Household
· direct · ~0.92
Mother
Jeanie Smith
b. ~1883
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Jack Smith
Son · 1940 · age 24 · b. ~1916 · Illinois
★ You are viewing this record
Sibling
Gordon Smith
Sibling · 1940 · age 26
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 — Kane-County, Illinois
Open full size
1940 US Federal Census — Kane-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00819-00222)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Billy | 7 | son | — | Illinois |
| 2 | Rosemary Billy | 5 | daughter | — | Illinois |
| 3 | Frank Bain | 59 | head | Machinist | Illinois |
| 4 | Florence Bain | 58 | wife | — | Illinois |
| 5 | Nora Stephens | 32 | daughter | Tailoress | Illinois |
| 6 | Dorothy Buckner | 26 | daughter | Waitress | Illinois |
| 7 | Donald Stephens | 13 | grandson | — | Illinois |
| 8 | Bradley Thomas | 26 | lodger | Construction | Michigan |
| 9 | Walter Manser | 26 | lodger | Steel Worker | Delaware |
| 10 | — | None | — | — | — |
| 11 | John Smith | 58 | head | Salesman | Scotland |
| 12 | Jean Smith | 57 | wife | — | Scotland |
| 13 | Gordon Smith | 26 | son | Teacher | Illinois |
| 14 | Jack Smith THIS PERSON | 24 | son | Salesman | Illinois |
| 15 | Jack Hennessy | 53 | head | Boxmaker | Illinois |
| 16 | Julia Hennessy | 51 | wife | — | Illinois |
| 17 | Alfred Nelson | 48 | head | Dist. Salesman | Sweden |
| 18 | Parson Nelson | 47 | wife | — | Texas |
| 19 | John Woodruff | 51 | head | Salesman | Illinois |
| 20 | Neva Woodruff | 39 | wife | — | Illinois |
| 21 | — | None | — | — | — |
| 22 | Martha Smith | 71 | head | — | Ohio |
| 23 | Martina Smith | 40 | daughter | Asst. Dietician | Illinois |
| 24 | Alice Smith | 26 | daughter | Switchboard | Illinois |
| 25 | G. W. Hanton | 32 | lodger | Salesman | Missouri |
| 26 | Robert Davidson | 54 | head | Laborer | Scotland |
| 27 | Lillian Davidson | 38 | wife | — | Oklahoma |
| 28 | Thomas Davidson | 17 | son | — | Oklahoma |
| 29 | Robert Davidson | 13 | son | — | Illinois |
| 30 | Sherry Davidson | 12 | daughter | — | Illinois |
| 31 | Harold Votts | 30 | head | Truck Driver | Illinois |
| 32 | Margaret Votts | 27 | wife | — | Iowa |
| 33 | Norma Jean Votts | 5 | daughter | — | Illinois |
| 34 | Margery Mae Votts | 0 | daughter | — | Illinois |
| 35 | Leslie Johnson | 27 | head | Press Foreman | Illinois |
| 36 | Lillian Johnson | 24 | wife | — | Illinois |
| 37 | Stewart Johnson | 4 | son | — | Illinois |
| 38 | David Johnson | 1 | son | — | Illinois |
| 39 | Max Haveman | 42 | head | Manager & Pharmacist | Russia |
| 40 | Lillian Haveman | 36 | wife | — | Massachusetts |
Related Census Records
Pedigree Summary
Jack + 1 sibling
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)