TC
Thomas Clark — 1940 US Census Record
Model Tree available1940 United States Federal Census · Lackawanna-County, Pennsylvania
Our Model Tree links this Thomas Clark across the 1910, 1920, 1930 and 1940 US Censuses in Lackawanna-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents Patrick & Matthew — first a son (b.~1908), then head of a 6-person household.
Age 32
b. ~1908
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Lackawanna-County, Pennsylvania |
| Surname | Clark |
| Given Name | Thomas |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Carbondale City |
| 1935 Residence (County) | Lackawanna |
| Additional Details | |
| Occupation | draftsman |
| Industry | Steel Mill |
| Class of Worker | PW |
| Hours Worked | 42 |
| Income (1939) | 1800 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Draftsman |
| Township / Ward | Carbondale City |
| Est. Birth Year | ~1908 |
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 Thomas | Age | Birth yr |
|---|---|---|---|---|
| Mary Clark | Daughter | — | 24 | ~1916 |
| Matthew Clark | Head | — | 40 | ~1900 |
| Joseph Clark | Son | — | 22 | ~1918 |
| Matthew Clark | Son | — | 29 | ~1911 |
| Thomas Clark | Son | — | 32 | ~1908 |
| Alice Clark | Spouse | — | 57 | ~1883 |
Census Appearances
1910
Lackawanna, Pennsylvania
Son, age 3
Lackawanna, Pennsylvania · implied b. ~1907 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read | No |
| Can Write | No |
| Speaks English | No |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1920
Lackawanna, Pennsylvania
Son, age 13
Lackawanna, Pennsylvania · implied b. ~1907 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clarke |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Lackawanna, Pennsylvania
Son, age 23
Lackawanna, Pennsylvania · implied b. ~1907 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | Machinist |
| Industry | Machine Shop |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Lackawanna-County, Pennsylvania
Son, age 32
Lackawanna-County, Pennsylvania · implied b. ~1908 — 6 household members
| Surname | Clark |
| Given Name | Thomas |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Carbondale City |
| 1935 Residence (County) | Lackawanna |
| Occupation | draftsman |
| Industry | Steel Mill |
| Class of Worker | PW |
| Hours Worked | 42 |
| Income (1939) | 1800 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
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 Clark across 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Patrick Clark (~0.92 confidence) and father Matthew Clark (~0.92 confidence) and father Michael Clarke (~0.92 confidence) and mother Nellie Clark (~0.92 confidence) and mother Alice Clarke (~0.92 confidence) and mother Alice Clark (~0.92 confidence) and father Matthew Clark (~0.60 confidence). The pedigree spans 1 generation with 7 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.87
Father
Patrick Clark
b. ~1876
Source father
● Household
· direct · ~0.92
Father
Matthew Clark
b. ~1879
Source father
● Household
· direct · ~0.92
Father
Michael Clarke
b. ~1880
Source father
● Household
· direct · ~0.92
Mother
Nellie Clark
b. ~1881
Source mother
● Household
· direct · ~0.92
Mother
Alice Clarke
b. ~1882
Source mother
● Household
· direct · ~0.92
Mother
Alice Clark
b. ~1883
Source mother
● Household
· direct · ~0.92
Father
Matthew Clark
b. ~1900
Source father
● Household
· direct · ~0.6
This person
Anchor record
Thomas Clark
Son · 1940 · age 32 · b. ~1908 · Pennsylvania
★ You are viewing this record
Sibling
Matthew Clark
Sibling · 1940 · age 29
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Clark
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Clark
Sibling · 1940 · age 22
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 — Lackawanna-County, Pennsylvania
Open full size
1940 US Federal Census — Lackawanna-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03522-00953)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John Dugan | 8 | Grand son | — | New Jersey |
| 2 | James F Dunleavy | 72 | uncle | — | Pennsylvania |
| 3 | Dennis Finnegan | 44 | Head | Hostler | Pennsylvania |
| 4 | Sadie V Finnegan | 40 | wife | — | Pennsylvania |
| 5 | Robert Finnegan | 15 | son | — | Pennsylvania |
| 6 | Paul Finnegan | 14 | son | — | Pennsylvania |
| 7 | Therese Finnegan | 12 | daughter | — | Pennsylvania |
| 8 | Dennis Jr Finnegan | 10 | son | — | Pennsylvania |
| 9 | Thomas Finnegan | 7 | son | — | Pennsylvania |
| 10 | Patrick J Boland | 66 | Head | Freight Agent | Pennsylvania |
| 11 | Bridget Boland | 65 | wife | — | Pennsylvania |
| 12 | Catherine Boland | 30 | daughter | Interne|Teacher | Pennsylvania |
| 13 | Margaret Boland | 28 | daughter | Teacher | Pennsylvania |
| 14 | John Boland | 22 | son | New Worker | Pennsylvania |
| 15 | Joseph Boland | 24 | son | New Worker | Pennsylvania |
| 16 | Mary A Gethins | 73 | Head | — | Pennsylvania |
| 17 | Frank Finnegan | 39 | Head | Office Clerk | Pennsylvania |
| 18 | Helen D Finnegan | 46 | sister | Charity Worker | Pennsylvania |
| 19 | Ruth Finnegan | 42 | sister | Nurse | Pennsylvania |
| 20 | Matthew D Clark | 40 | Head | Foreman | Pennsylvania |
| 21 | Alice Clark | 57 | wife | — | Pennsylvania |
| 22 | Thomas Clark THIS PERSON | 32 | son | Draftsman | Pennsylvania |
| 23 | Matthew Jr Clark | 29 | son | Tool Maker | Pennsylvania |
| 24 | Mary Clark | 24 | daughter | School Teacher | Pennsylvania |
| 25 | Joseph Clark | 22 | son | Laborer | Pennsylvania |
| 26 | Vincent Walker | 35 | Head | Conduyman | Pennsylvania |
| 27 | Florence Walker | 35 | wife | — | Pennsylvania |
| 28 | Vincent Walker | 9 | son | — | Pennsylvania |
| 29 | Paul Walker | 6 | son | — | Pennsylvania |
| 30 | Gerard Walker | 3 | son | — | Pennsylvania |
| 31 | Mary J Moran | 70 | mother | — | Pennsylvania |
| 32 | James Campbell | 63 | Head | Laborer | Pennsylvania |
| 33 | Joseph D Campbell | 19 | son | Packing Ice | Pennsylvania |
| 34 | Jane Campbell | 18 | daughter | — | Pennsylvania |
| 35 | Claude Latonette | 56 | Head | Brakeman | Pennsylvania |
| 36 | Maude Latonette | 56 | wife | — | Pennsylvania |
| 37 | James Stan Latonette | 36 | Head | Machine Runner | Pennsylvania |
| 38 | Genevieve Latonette | 31 | wife | — | Pennsylvania |
| 39 | Joseph Langan | 56 | Head | Truck Driver | Pennsylvania |
| 40 | Augusta Langan | 59 | wife | — | Pennsylvania |
Pedigree Summary
Thomas + 3 siblings
Gen 1 · 7 parents
~0.87
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)