TS
Thomas Smith — 1940 US Census Record
Model Tree available1940 United States Federal Census · Sangamon-County, Illinois
Our Model Tree links this Thomas Smith across the 1920, 1930 and 1940 US Censuses in Sangamon-County, Illinois (XGBoost, ~Confirmed), with identified parents Thomas & Thomas — first a son (b.~1914), then head of a 3-person household.
Age 26
b. ~1914
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Sangamon-County, Illinois |
| Surname | Smith |
| Given Name | Thomas C. Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Springfield City |
| 1935 Residence (County) | Sangamon |
| Additional Details | |
| Occupation | Engineer |
| Industry | State Dept. |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 911 |
| Highest Grade | C 1 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Engineer |
| Township / Ward | Springfield City |
| Est. Birth Year | ~1914 |
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 Thomas | Age | Birth yr |
|---|---|---|---|---|
| Thomas Smith | Head | — | 61 | ~1879 |
| Thomas Smith | Son | — | 26 | ~1914 |
| Bess Smith | Spouse | — | 54 | ~1886 |
Census Appearances
1920
Sangamon, Illinois
Son, age 5
Sangamon, Illinois · implied b. ~1915 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | Thomas C. Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read | No |
| Can Write | No |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Sangamon, Illinois
Son, age 16
Sangamon, Illinois · implied b. ~1914 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | Thomas C. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Sangamon-County, Illinois
Son, age 26
Sangamon-County, Illinois · implied b. ~1914 — 3 household members
| Surname | Smith |
| Given Name | Thomas C. Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Springfield City |
| 1935 Residence (County) | Sangamon |
| Occupation | Engineer |
| Industry | State Dept. |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 911 |
| Highest Grade | C 1 |
| 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 Thomas Smith across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Thomas Smith (~0.92 confidence) and father Thomas Smith (~0.92 confidence) and mother Bess Smith (~0.92 confidence) and mother Bess Smith (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Thomas Smith
b. ~1879
Source father
● Household
· direct · ~0.92
Father
Thomas Smith
b. ~1873
Source father
● Household
· direct · ~0.92
Mother
Bess Smith
b. ~1886
Source mother
● Household
· direct · ~0.92
Mother
Bess Smith
b. ~1886
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Thomas Smith
Son · 1940 · age 26 · b. ~1914 · 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 — Sangamon-County, Illinois
Open full size
1940 US Federal Census — Sangamon-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00886-00578)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Leon E. Fisher | 55 | Head | Owner | Illinois |
| 2 | Francis K. Fisher | 53 | Wife | — | Illinois |
| 3 | Sally L. Fisher | 19 | Daughter | — | Illinois |
| 4 | Erna Giesemeyer | 41 | Maid | Maid | Missouri |
| 5 | Charles Sampson | 63 | Head | Doctor | Illinois |
| 6 | Mary Sampson | 66 | Wife | — | Kansas |
| 7 | Carl Webb | 42 | Nephew | — | Illinois |
| 8 | August Mccashen | 60 | Sister | — | Illinois |
| 9 | Alex Mccashen | 63 | Brother-in-law | — | Illinois |
| 10 | W. H. Irwin | 58 | Head | Traffic Manager | Illinois |
| 11 | Dora Irwin | 53 | Wife | — | Illinois |
| 12 | Edward J. Hughes | 51 | Head | Official | Illinois |
| 13 | Winifred Hughes | 43 | Wife | — | Illinois |
| 14 | Mary E. Hughes | 15 | Daughter | — | Illinois |
| 15 | David S. Benjamin | 62 | Head | Salesman | Illinois |
| 16 | Gertrude Benjamin | 54 | Wife | — | Illinois |
| 17 | N. B. Antone | 26 | Son-in-law | — | New York |
| 18 | Nancy Murray | 46 | Maid | Maid | Illinois |
| 19 | Frank Evans | 52 | Head | Doctor | Iowa |
| 20 | Gertrude Evans | 44 | Wife | — | England |
| 21 | Mary Evans | 18 | Daughter | — | Illinois |
| 22 | Paul Donley | 43 | Head | Lawyer | Illinois |
| 23 | Winifred Donley | 42 | Wife | — | Michigan |
| 24 | James Donley | 19 | Son | — | Illinois |
| 25 | Thelma Donley | 14 | Daughter | — | Illinois |
| 26 | Nellie Balmer | 41 | Maid | Maid | Kentucky |
| 27 | (Blank) (Blank) | None | (blank) | — | (blank) |
| 28 | Thomas C. Smith | 61 | Head | Contractor | Illinois |
| 29 | Bess Smith | 54 | Wife | — | Illinois |
| 30 | Thomas C. Jr. Smith THIS PERSON | 26 | Son | Engineer | Illinois |
| 31 | Philbrook Donnelly | 53 | Head | Official | Illinois |
| 32 | Emma A. Donnelly | 50 | Wife | — | Illinois |
| 33 | Penelope Donnelly | 24 | Daughter | — | Illinois |
| 34 | John F. Jr. Donnelly | 22 | Son | Laborer | Illinois |
| 35 | James S. Donnelly | 21 | Son | Mechanic | Illinois |
| 36 | Edward O'Brien | 63 | Head | (Blank) | Illinois |
| 37 | Catherine O'Brien | 60 | Wife | — | Illinois |
| 38 | Catherine O'Brien | 19 | Daughter | — | Illinois |
| 39 | Nellie Frey | 29 | Maid | Maid | Illinois |
| 40 | Harriet V. Barker | 63 | Head | — | Illinois |
Pedigree Summary
Thomas
Gen 1 · 4 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)