JT
Joseph Thomas — 1940 US Census Record
Model Tree available1940 United States Federal Census · St.-Clair-County, Illinois
Our Model Tree links this Joseph Thomas across the 1920, 1930 and 1940 US Censuses in St.-Clair-County, Illinois (XGBoost, ~Confirmed), with identified parents Claude & Dora — first a head (b.~1910), then head of a 7-person household.
Age 30
b. ~1910
Male
Head
Born: Kentucky
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | St.-Clair-County, Illinois |
| Surname | Thomas |
| Given Name | Joseph |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Kentucky |
| 1935 Residence (County) | St. Clair |
| Additional Details | |
| Occupation | Railroad |
| Industry | OA |
| Class of Worker | 420 |
| Highest Grade | Hs 8 |
| 1935 Residence | 48 |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
| Occupation | Railroad |
| Township / Ward | E St Louis |
| Est. Birth Year | ~1910 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Joseph | Age | Birth yr |
|---|---|---|---|---|
| Shirley Thomas | Daughter | — | 8 | ~1932 |
| Claudette Thomas | Daughter | — | 9 | ~1931 |
| Joseph Thomas | Head | — | 30 | ~1910 |
| Joseph Carrico | Other | — | 23 | ~1917 |
| Samuel Thomas | Son | — | 3 | ~1937 |
| William Thomas | Son | — | 6 | ~1934 |
| Hazel Thomas | Spouse | — | 31 | ~1909 |
Census Appearances
1920
St Clair, …
Son, age 10
St Clair, Illinois · implied b. ~1910 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Joseph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Kentucky |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1930
St Clair, …
Son, age 20
St Clair, Illinois · implied b. ~1910 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Joseph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Kentucky |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Occupation | Car repairer |
| Industry | Railroad |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1940
St.-Clair-County, Illinois
Head, age 30
St.-Clair-County, Illinois · implied b. ~1910 — 7 household members
| Surname | Thomas |
| Given Name | Joseph |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Kentucky |
| 1935 Residence (County) | St. Clair |
| Occupation | Railroad |
| Industry | OA |
| Class of Worker | 420 |
| Highest Grade | Hs 8 |
| 1935 Residence | 48 |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
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 Joseph Thomas across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Claude Thomas (~0.92 confidence) and mother Dora Thomas (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Claude Thomas
b. ~1887
Source father
● Household
· direct · ~0.92
Mother
Dora Thomas
b. ~1887
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Joseph Thomas
Head · 1940 · age 30 · b. ~1910 · 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 — St.-Clair-County, Illinois
Open full size
1940 US Federal Census — St.-Clair-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00880-00198)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Patricia Roche | 1 | Daughter | — | Illinois |
| 42 | Nora Gray | 35 | Head | Household | Tennessee |
| 43 | James Steiner | 19 | Son | — | Illinois |
| 44 | Shirley Gray | 13 | Daughter | — | Illinois |
| 45 | Donald Gray | 4 | Son | — | Illinois |
| 46 | Richard Miller | 66 | Head | — | Illinois |
| 47 | Mary Miller | 51 | Wife | — | Illinois |
| 48 | Marvin Rubens | 17 | Son | C.C.C. | Illinois |
| 49 | Julia Kotopka | 39 | Head | Casing Maker | Poland |
| 50 | Helen Kotopka | 7 | Daughter | — | Illinois |
| 51 | Alex Kotopka | 6 | Son | — | Illinois |
| 52 | Charlie Kotopka | 44 | Head | — | Poland |
| 53 | Anna Kotopka | 32 | Wife | Meat Packing | Illinois |
| 54 | Joseph Thomas THIS PERSON | 30 | Head | Railroad | Kentucky |
| 55 | Hazel Thomas | 31 | Wife | — | Kentucky |
| 56 | Claudette Thomas | 9 | Daughter | — | Illinois |
| 57 | Shirley Mae Thomas | 8 | Daughter | — | Illinois |
| 58 | William Thomas | 6 | Son | — | Illinois |
| 59 | Samuel Thomas | 3 | Son | — | Illinois |
| 60 | Joseph Carrico | 23 | Brother-in-law | 48 | Kentucky |
| 61 | Carl Heitmueller | 26 | Head | Movie | Illinois |
| 62 | Helen Heitmueller | 23 | Wife | Restaurant | Illinois |
| 63 | Lula Hobbs | 42 | Head | 48 | Kentucky |
| 64 | Milton Willett | 72 | Father | — | Kentucky |
| 65 | William Willett | 37 | Brother | Can Factory | Kentucky |
| 66 | Ira Reed | 43 | Head | Meat Packing Co. | Illinois |
| 67 | Mary Reed | 43 | Wife | — | Illinois |
| 68 | Betty Reed | 14 | Daughter | — | Illinois |
| 69 | Charles Ferris | 38 | Head | Sewage Project | Illinois |
| 70 | Alvin Ferris | 18 | Son | Coal Yard | Illinois |
| 71 | Donatus Ferris | 16 | Son | General Farm | Illinois |
| 72 | John Leitsch | 40 | Head | Meat Packing Co. | Illinois |
| 73 | Ethel Leitsch | 41 | Wife | — | Illinois |
| 74 | Roy Essay | 22 | Nephew | Meat Packing Co. | Illinois |
| 75 | John Leitsch | 5 | Son | — | Illinois |
| 76 | Howard Bolin | 36 | Head | 48 | Illinois |
| 77 | Ruth Bolin | 33 | Wife | — | Illinois |
| 78 | Rosalee Bolin | 11 | Daughter | — | Illinois |
| 79 | Edwin Skinner | 76 | Head | Car Shop Foundry | Wisconsin |
| 80 | Gertrude Skinner | 67 | Wife | — | Wisconsin |
Pedigree Summary
Joseph
Gen 1 · 2 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)