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Charles Alexander — 1940 US Census Record
Model Tree available1940 United States Federal Census · St.-Clair-County, Illinois
Our Model Tree links this Charles Alexander across the 1920, 1930 and 1940 US Censuses in St.-Clair-County, Illinois (XGBoost, ~Confirmed), with identified parents Charles & Lillian — first a son (b.~1917), then head of a 5-person household.
Age 23
b. ~1917
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | St.-Clair-County, Illinois |
| Surname | Alexander |
| Given Name | Charles D |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | East St. Louis |
| 1935 Residence (County) | St Clair |
| Additional Details | |
| Occupation | Oiler |
| Industry | Chemical Co |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1634 |
| Highest Grade | C 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Oiler |
| Township / Ward | East St Louis |
| Est. Birth Year | ~1917 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Charles | Age | Birth yr |
|---|---|---|---|---|
| Gloria Alexander | Daughter | — | 17 | ~1923 |
| Charles Alexander | Head | — | 56 | ~1884 |
| Extra Extra Line | Other | — | 28 | ~1912 |
| Charles Alexander | Son | — | 23 | ~1917 |
| Lillian Alexander | Spouse | — | 54 | ~1886 |
Census Appearances
1920
St Clair, …
Son, age 3
St Clair, Illinois · implied b. ~1917 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Alexander |
| Given Name | Charles |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Ohio |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
St Clair, …
Son, age 13
St Clair, Illinois · implied b. ~1917 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Alexander |
| Given Name | Charles H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Ohio |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
St.-Clair-County, Illinois
Son, age 23
St.-Clair-County, Illinois · implied b. ~1917 — 5 household members
| Surname | Alexander |
| Given Name | Charles D |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | East St. Louis |
| 1935 Residence (County) | St Clair |
| Occupation | Oiler |
| Industry | Chemical Co |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1634 |
| Highest Grade | C 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 Charles Alexander across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Charles Alexander (~0.92 confidence) and mother Lillian Alexander (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Charles Alexander
b. ~1884
Source father
● Household
· direct · ~0.92
Mother
Lillian Alexander
b. ~1886
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Charles Alexander
Son · 1940 · age 23 · b. ~1917 · Illinois
★ You are viewing this record
Sibling
Gloria Alexander
Sibling · 1940 · age 17
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 — 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-t0627-00881-00732)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Walter B Jones | 55 | Head | Milk Salesman | Illinois |
| 2 | Laura Jones | 53 | Wife | — | Illinois |
| 3 | Charles H Alexander | 56 | Head | Road Fireman Of Engines | Illinois |
| 4 | Lillian E Alexander | 54 | Wife | — | Ohio |
| 5 | Extra Line Extra Line | 28 | — | — | Extra Line |
| 6 | Charles D Alexander THIS PERSON | 23 | son | Oiler | Illinois |
| 7 | Gloria J Alexander | 17 | daughter | — | Illinois |
| 8 | Robert B Thurman | 37 | Head | Tallyman | Indiana |
| 9 | Olive L Thurman | 36 | Wife | — | Indiana |
| 10 | Mary E Thurman | 13 | daughter | — | Indiana |
| 11 | George R Thurman | 2 | son | — | Illinois |
| 12 | Linda Thurman | 0 | daughter | — | Illinois |
| 13 | Mary A Klawonn | 65 | Head | — | Illinois |
| 14 | William Klawonn | 39 | son | Rev. Car Repairer | Illinois |
| 15 | John Klawonn | 37 | son | Welder Helper | Illinois |
| 16 | Julius Paupkovits | 65 | Head | Laborer | Hungary |
| 17 | Sadie Paupkovits | 61 | Wife | — | Hungary |
| 18 | Charles Papp | 58 | Head | Operator | Bulgaria |
| 19 | Juliet Papp | 53 | Wife | — | Bulgaria |
| 20 | Edward Simpson | 51 | Head | Switchman | Illinois |
| 21 | Estelle Simpson | 51 | Wife | — | Illinois |
| 22 | Thomas E Simpson | 20 | son | Helper On Truck | Illinois |
| 23 | Here Ends Block #23 Start Block #24 | None | — | — | — |
| 24 | Henry Stueckel | 43 | Head | Car Inspector | Illinois |
| 25 | Dorothy Stueckel | 45 | Wife | — | Mississippi |
| 26 | Henry Jr Stueckel | 18 | son | Apprentice Machinist | Illinois |
| 27 | Dorothy M Stueckel | 16 | daughter | — | Illinois |
| 28 | Rodger Stueckel | 8 | son | — | Illinois |
| 29 | Alfred Olsen | 77 | Boarder | — | Sweden |
| 30 | William Trares | 60 | Head | Warehouseman | Missouri |
| 31 | Catherine Trares | 41 | Wife | — | Illinois |
| 32 | Robert Trares | 21 | son | Secretary Clerk | Missouri |
| 33 | Virginia Trares | 9 | daughter | — | Illinois |
| 34 | Robert E Hanley | 27 | Head | Caseer | Illinois |
| 35 | Virginia D Hanley | 24 | Wife | — | Illinois |
| 36 | James H Finley | 72 | Head | — | Illinois |
| 37 | Jessie E Finley | 73 | Wife | — | Illinois |
| 38 | Herbert D Pratt | 33 | Head | Operator | Illinois |
| 39 | Rose Pratt | 29 | Wife | — | Illinois |
| 40 | Michael J Pratt | 7 | son | — | Illinois |
Pedigree Summary
Charles + 1 sibling
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)