TS
Thelma Smith — 1940 US Census Record
Model Tree available1940 United States Federal Census · Trumbull-County, Ohio
Our Model Tree links this Thelma Smith across the 1920, 1930 and 1940 US Censuses in Trumbull-County, Ohio (XGBoost, ~Confirmed), with identified parents William & William — first a daughter (b.~1910), then head of a 3-person household.
Age 30
b. ~1910
Female
Daughter
Born: Ohio
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Trumbull-County, Ohio |
| Surname | Smith |
| Given Name | Thelma O. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Niles City |
| 1935 Residence (County) | Trumbull |
| Additional Details | |
| Occupation | Registered Nurse |
| Industry | Private Industry |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 400 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same Place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Occupation | Registered Nurse |
| Township / Ward | Niles City |
| 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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Thelma | Age | Birth yr |
|---|---|---|---|---|
| Thelma Smith | Daughter | — | 30 | ~1910 |
| William Smith | Head | — | 68 | ~1872 |
| Blanche Smith | Spouse | — | 64 | ~1876 |
Census Appearances
1920
Trumbull, Ohio
Daughter, age 10
Trumbull, Ohio · implied b. ~1910 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | Thelma O. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | England |
| Mother's Birthplace | England |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1930
Trumbull, Ohio
Daughter, age 20
Trumbull, Ohio · implied b. ~1910 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | Thelma |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | England |
| Mother's Birthplace | England |
| Occupation | Trained Nurse |
| Industry | Hospital |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
Trumbull-County, Ohio
Daughter, age 30
Trumbull-County, Ohio · implied b. ~1910 — 3 household members
| Surname | Smith |
| Given Name | Thelma O. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Niles City |
| 1935 Residence (County) | Trumbull |
| Occupation | Registered Nurse |
| Industry | Private Industry |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 400 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same Place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
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 Thelma Smith across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father William Smith (~0.92 confidence) and father William Smith (~0.92 confidence) and father William Smith (~0.92 confidence) and mother Blanche Smith (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Smith
b. ~1871
Source father
● Household
· direct · ~0.92
Father
William Smith
b. ~1871
Source father
● Household
· direct · ~0.92
Father
William Smith
b. ~1872
Source father
● Household
· direct · ~0.92
Mother
Blanche Smith
b. ~1876
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Thelma Smith
Daughter · 1940 · age 30 · b. ~1910 · Ohio
★ 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 — Trumbull-County, Ohio
Open full size
1940 US Federal Census — Trumbull-County, Ohio
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03159-00455)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | H. Howard Williams | 47 | Head | Dentist | Ohio |
| 42 | Nina D. Williams | 47 | Wife | — | Illinois |
| 43 | Howard D. Williams | 15 | Son | — | Ohio |
| 44 | Ralph E. Williams | 13 | Son | — | Ohio |
| 45 | William J. Jones | 66 | Head | — | Pennsylvania |
| 46 | Mary M. Jones | 64 | Wife | — | Wales |
| 47 | Margaret Jones | 40 | Daughter | — | Pennsylvania |
| 48 | Bertha J. Hutchings | 48 | Head | — | Ohio |
| 49 | Paul E. Hutchings | 22 | Son | Teller | Ohio |
| 50 | Thomas J. Thomas | 75 | Father | — | Pennsylvania |
| 51 | Margaret Evans | 63 | Lodger | Seamstress | Wales |
| 52 | Michael Mc Gowan | 62 | Head | Funeral Director | Ohio |
| 53 | Margaret A. Mc Gowan | 52 | Wife | Deputy Coll. | Ohio |
| 54 | Martin H. Crane | 65 | Cousin | — | Ireland |
| 55 | Alma Glusic | 24 | Servant | Servant | Ohio |
| 56 | Alfred O. Wilson | 36 | Head | Foreman | Ohio |
| 57 | Bernice M. Wilson | 27 | Wife | — | Ohio |
| 58 | Deann Wilson | 2 | Daughter | — | Ohio |
| 59 | Harry R. Sheffer | 63 | Father-in-law | Machinist | Ohio |
| 60 | Winifred Malin | 59 | Head | — | Ohio |
| 61 | Howard Price | 38 | Son-in-law | Laborer | Ohio |
| 62 | Winifred Price | 32 | Daughter | Saleslady | Ohio |
| 63 | Joanne Price | 12 | Granddaughter | — | Ohio |
| 64 | Christopher Clark | 55 | Head | Sheet Operator | England |
| 65 | Lucretia Clark | 54 | Wife | — | Pennsylvania |
| 66 | Christopher J. Clark | 29 | Son | Chief Clerk | Ohio |
| 67 | Alberta O. Clark | 28 | Daughter | Teacher | Ohio |
| 68 | John Ellwood | 71 | Head | — | England |
| 69 | George A. Damon | 54 | Son-in-law | Laborer | Massachusetts |
| 70 | Winifred Damon | 48 | Daughter | — | Ohio |
| 71 | A. Jr. George | 21 | Son | Truck Driver | Ohio |
| 72 | Ruth Harriette George | 19 | Daughter | Servant | Ohio |
| 73 | John C. George | 18 | Son | New Maker | Ohio |
| 74 | William Smith | 68 | Head | Furnace Man | England |
| 75 | Blanche Smith | 64 | Wife | — | England |
| 76 | Thelma O. Smith THIS PERSON | 30 | Daughter | Registered Nurse | Ohio |
| 77 | Charles A. Gilbert | 66 | Head | Manager | Ohio |
| 78 | Grace M. Gilbert | 65 | Wife | — | Ohio |
| 79 | Kent Gilbert | 33 | Son | Truck Driver | Ohio |
| 80 | Helen Gilbert | 25 | Daughter | Inspector | Ohio |
Related Census Records
Pedigree Summary
Thelma
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)