TC
Thomas Campbell — 1940 US Census Record
Model Tree available1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Thomas Campbell across the 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents Thomas & Thomas — first a head (b.~1909), then head of a 6-person household.
Age 31
b. ~1909
Male
Head
Born: Pennsylvania
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Campbell |
| Given Name | Thomas P |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh City |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Occupation | Millwright |
| Industry | Steel mill |
| Class of Worker | PW |
| Hours Worked | 20 |
| Income (1939) | 13 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Millwright |
| Township / Ward | Pittsburgh City |
| Est. Birth Year | ~1909 |
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 |
|---|---|---|---|---|
| Margaret Campbell | Daughter | — | 8 | ~1932 |
| Maudie Campbell | Daughter | — | 6 | ~1934 |
| Betty Campbell | Daughter | — | 4 | ~1936 |
| Thomas Campbell | Head | — | 31 | ~1909 |
| Thomas Campbell | Son | — | 1 | ~1939 |
| Loretta Campbell | Spouse | — | 26 | ~1914 |
Census Appearances
1920
Allegheny, Pennsylvania
Son, age 10
Allegheny, Pennsylvania · implied b. ~1910 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | Thomas J |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| 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
Allegheny, Pennsylvania
Son, age 21
Allegheny, Pennsylvania · implied b. ~1909 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | Thomas J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | Waiter |
| Industry | Lunchroom |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Head, age 31
Allegheny-County, Pennsylvania · implied b. ~1909 — 6 household members
| Surname | Campbell |
| Given Name | Thomas P |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh City |
| 1935 Residence (County) | Allegheny |
| Occupation | Millwright |
| Industry | Steel mill |
| Class of Worker | PW |
| Hours Worked | 20 |
| Income (1939) | 13 |
| Highest Grade | Hs 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 Campbell across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Thomas Campbell (~0.92 confidence) and father Thomas Campbell (~0.92 confidence) and mother Annie Campbell (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Thomas Campbell
b. ~1885
Source father
● Household
· direct · ~0.92
Father
Thomas Campbell
b. ~1886
Source father
● Household
· direct · ~0.92
Mother
Annie Campbell
b. ~1887
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Thomas Campbell
Head · 1940 · age 31 · b. ~1909 · Pennsylvania
★ 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 — Allegheny-County, Pennsylvania
Open full size
1940 US Federal Census — Allegheny-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03670-00341)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Martin E Curtin | 70 | Head | Laborer | Pennsylvania |
| 2 | Mary E Curtin | 74 | Wife | — | Pennsylvania |
| 3 | August J Schwartz | 62 | Head | Laborer | Germany |
| 4 | Louise M Schwartz | 55 | Wife | — | Pennsylvania |
| 5 | Herman A Schwartz | 29 | Son | Counter Clerk | Pennsylvania |
| 6 | Robert A Schwartz | 8 | Grandson | — | Pennsylvania |
| 7 | Mattie A Gibson | 58 | Head | — | Georgia |
| 8 | Melvin Lee Harris | 36 | Son | — | Alabama |
| 9 | Thomas Brandon | 22 | Head | Laborer | Virginia |
| 10 | Lucille E Brandon | 20 | Wife | — | Pennsylvania |
| 11 | Barbara Ann Brandon | 1 | Daughter | — | Pennsylvania |
| 12 | R Lawrence | 20 | Head | Errand Boy | Pennsylvania |
| 13 | Louise Lawrence | 19 | Wife | — | Pennsylvania |
| 14 | Thomas Brandon | 58 | Head | Truck Driver | Virginia |
| 15 | Mary Brandon | 29 | Step daughter | Maid | Pennsylvania |
| 16 | Joseph Brandon | 26 | Step son | Porter | Pennsylvania |
| 17 | Clarence Walker | 45 | Lodger | Porter | Pennsylvania |
| 18 | Elizabeth Walker | 33 | Lodger's wife | — | Pennsylvania |
| 19 | Betty Walker | 13 | Lodger's daughter | — | Pennsylvania |
| 20 | Paul Dolansky | 60 | Head | Laborer | Austria |
| 21 | Anna M Dolansky | 59 | Wife | — | Germany |
| 22 | Felix Gombone | 68 | Head | Watchman | Italy |
| 23 | Virginia Gombone | 68 | Wife | — | Italy |
| 24 | Thomas P Campbell THIS PERSON | 31 | Head | Millwright | Pennsylvania |
| 25 | Loretta Campbell | 26 | Wife | — | Virginia |
| 26 | Margaret J Campbell | 8 | Daughter | — | Pennsylvania |
| 27 | Maudie L Campbell | 6 | Daughter | — | Pennsylvania |
| 28 | Betty Jane Campbell | 4 | Daughter | — | Pennsylvania |
| 29 | Thomas P Jr Campbell | 1 | Son | — | Pennsylvania |
| 30 | Thomas R Curtin | 51 | Head | Pipe Fitter | Pennsylvania |
| 31 | John J Curtin | 62 | Head | Timekeeper | Pennsylvania |
| 32 | Agnes Curtin | 51 | Wife | — | Pennsylvania |
| 33 | James P Curtin | 20 | Son | Common Laborer | Pennsylvania |
| 34 | Catherine T Curtin | 18 | Daughter | — | Pennsylvania |
| 35 | Mary J Curtin | 16 | Daughter | — | Pennsylvania |
| 36 | Joseph D Curtin | 11 | Son | — | Pennsylvania |
| 37 | William J Kelly | 57 | Head | — | Pennsylvania |
| 38 | Sara E Kelly | 50 | Wife | — | West Virginia |
| 39 | Marian D Kelly | 25 | Daughter | Accounting Clerk | Pennsylvania |
| 40 | William S Kelly | 23 | Son | Truck Driver Helper | Pennsylvania |
Pedigree Summary
Thomas
Gen 1 · 3 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)