DT
Dorothy Thompson — 1940 US Census Record
Model Tree available1940 United States Federal Census · St.-Clair-County, Illinois
Our Model Tree links this Dorothy Thompson across the 1920, 1930 and 1940 US Censuses in St.-Clair-County, Illinois (XGBoost, ~Confirmed), with identified parents Howard & H — first a daughter (b.~1919), then head of a 6-person household.
Age 21
b. ~1919
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | St.-Clair-County, Illinois |
| Surname | Thompson |
| Given Name | Dorothy M. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | East St. Louis |
| 1935 Residence (County) | St. Clair |
| Additional Details | |
| Occupation | Tel Operator |
| Industry | City Water Co |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 900 |
| Highest Grade | H 3 |
| 1935 Residence | Same Place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Tel Operator |
| Township / Ward | East St Louis |
| Est. Birth Year | ~1919 |
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 Dorothy | Age | Birth yr |
|---|---|---|---|---|
| Dorothy Thompson | Daughter | — | 21 | ~1919 |
| Virginia Thompson | Daughter | — | 15 | ~1925 |
| Jean Thompson | Daughter | — | 18 | ~1922 |
| H Thompson | Head | — | 50 | ~1890 |
| John Thompson | Son | — | 19 | ~1921 |
| Ann Thompson | Spouse | — | 49 | ~1891 |
Census Appearances
1920
St Clair, …
Daughter, age 1
St Clair, Illinois · implied b. ~1919 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thompson |
| Given Name | Dorothy A |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
St Clair, …
Daughter, age 11
St Clair, Illinois · implied b. ~1919 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thompson |
| Given Name | Dorothy D. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
St.-Clair-County, Illinois
Daughter, age 21
St.-Clair-County, Illinois · implied b. ~1919 — 6 household members
| Surname | Thompson |
| Given Name | Dorothy M. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | East St. Louis |
| 1935 Residence (County) | St. Clair |
| Occupation | Tel Operator |
| Industry | City Water Co |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 900 |
| 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 Dorothy Thompson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Howard Thompson (~0.92 confidence) and father H Thompson (~0.92 confidence) and mother A Thompson (~0.92 confidence) and father William Thompson (~0.92 confidence) and mother Anna Thompson (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Howard Thompson
b. ~1870
Source father
● Household
· direct · ~0.92
Father
H Thompson
b. ~1890
Source father
● Household
· direct · ~0.92
Mother
A Thompson
b. ~1891
Source mother
● Household
· direct · ~0.92
Father
William Thompson
b. ~1891
Source father
● Household
· direct · ~0.92
Mother
Anna Thompson
b. ~1892
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Dorothy Thompson
Daughter · 1940 · age 21 · b. ~1919 · Illinois
★ You are viewing this record
Sibling
John Thompson
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Virginia Thompson
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jean Thompson
Sibling · 1940 · age 18
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
39 people indexed on this census page (nara:1940:m-t0627-00880-00762)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Joseph O. Layton | 41 | Head | Baker | Missouri |
| 42 | Edna R. Layton | 34 | Wife | — | Missouri |
| 43 | Robert Layton | 14 | Son | — | Illinois |
| 44 | Jean Layton | 13 | Daughter | — | Illinois |
| 45 | Ruth Layton | 11 | Daughter | — | Illinois |
| 46 | Norman Layton | 10 | Son | — | Illinois |
| 47 | Jerry Layton | 8 | Son | — | Illinois |
| 48 | Ronald Layton | 6 | Son | — | Illinois |
| 49 | Patsy Layton | 5 | Daughter | — | Illinois |
| 50 | Janet Layton | 4 | Daughter | — | Illinois |
| 51 | Marian Layton | 2 | Daughter | — | Illinois |
| 53 | Milford H. Thompson | 61 | Head | Loco Fireman | Mississippi |
| 54 | Sue L. Thompson | 60 | Wife | — | Iowa |
| 55 | Ruth Thompson | 36 | Daughter | Printer | Missouri |
| 56 | Thos F. Thompson | 24 | Son | Chem Engineer | Illinois |
| 57 | James Sexton Hendry | 65 | Head | Loco Engineer | Iowa |
| 58 | Katherine Hendry | 65 | Wife | — | Missouri |
| 59 | Geo F. Hendry | 34 | Son | Supt Co-Op | Illinois |
| 60 | Nellie Hendry | 32 | Daughter | — | Illinois |
| 61 | H. M. Thompson | 50 | Head | Inspector | Pennsylvania |
| 62 | Ann J. Thompson | 49 | Wife | — | Illinois |
| 63 | Dorothy M. Thompson THIS PERSON | 21 | Daughter | Tel Operator | Illinois |
| 64 | John Patrick Thompson | 19 | Son | Clerk | Illinois |
| 65 | Jean Thompson | 18 | Daughter | Nurse Student | Illinois |
| 66 | Virginia Thompson | 15 | Daughter | — | Illinois |
| 67 | Julius Guse | 55 | Head | Plasterer | Germany |
| 68 | Olga Guse | 49 | Wife | — | Germany |
| 69 | Norman Guse | 22 | Son | Labor | Illinois |
| 70 | Charles Guse | 19 | Son | Labor | Missouri |
| 71 | Pauline Guse | 16 | Daughter | — | Illinois |
| 72 | John W. Walsh | 57 | Head | Truck Driver | Ireland |
| 73 | Margaret Walsh | 54 | Wife | — | Ireland |
| 74 | Mary Jane Walsh | 12 | Niece | — | Illinois |
| 75 | Eugene Colli Flower | 37 | Lodger | Car Repair | Illinois |
| 76 | Margaret Colli Flower | 31 | Wife | — | Illinois |
| 77 | William Moore | 45 | Head | Foreman Millwright | Illinois |
| 78 | Beulah Moore | 47 | Wife | — | Illinois |
| 79 | Mary H. Moore | 21 | Daughter | Stenographer | Illinois |
| 80 | William Moore | 19 | Son | — | Illinois |
Pedigree Summary
Dorothy + 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)