WC
William Campbell — 1940 US Census Record
Model Tree available1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this William Campbell across the 1900, 1910, 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents Robert & Robert — first a son (b.~1882), then head of a 2-person household.
Age 58
b. ~1882
Male
Son
Born: Scotland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Campbell |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 58 |
| Marital Status | Single |
| Birthplace | Scotland |
| 1935 Residence (City) | Pitcairn Borough |
| 1935 Residence (County) | Allegheny |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Machinist |
| Industry | Rail road |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 1800 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
| Occupation | Machinist |
| Township / Ward | Pitcairn Borough |
| Est. Birth Year | ~1882 |
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.
2 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| James Campbell | Head | — | 83 | ~1857 |
| William Campbell | Son | — | 58 | ~1882 |
Census Appearances
1900
Allegheny, Pennsylvania
Son, age 19
Allegheny, Pennsylvania · implied b. ~1881 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Scotland |
| Birth Month | Feb |
| Birth Year | 1881 |
| Year of Immigration | 1891 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Scotland |
| Occupation | Run machine in lumber mill |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
1910
Allegheny, Pennsylvania
Son, age 27
Allegheny, Pennsylvania · implied b. ~1883 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Scotland |
| Year of Immigration | 1891 |
| Naturalization Status | First papers filed |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | Machinist |
| Industry | Machine Shop |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | English |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
1920
Allegheny, Pennsylvania
Son, age 37
Allegheny, Pennsylvania · implied b. ~1883 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | William J |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 37 |
| Marital Status | Single |
| Birthplace | Scotland |
| Year of Immigration | 1891 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Scotland |
| Occupation | Machinist |
| Industry | Railroad |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Irish |
| Birth Country | Scotland |
| Year of Naturalization | 1894 |
| Birthplace (normalized) | scotland |
1930
Allegheny, Pennsylvania
Son, age 49
Allegheny, Pennsylvania · implied b. ~1881 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 49 |
| Marital Status | Single |
| Birthplace | Scotland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1890 |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | Mach. Helper |
| Industry | Steam Railroad |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
1940
Allegheny-County, Pennsylvania
Son, age 58
Allegheny-County, Pennsylvania · implied b. ~1882 — 2 household members
| Surname | Campbell |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 58 |
| Marital Status | Single |
| Birthplace | Scotland |
| 1935 Residence (City) | Pitcairn Borough |
| 1935 Residence (County) | Allegheny |
| Naturalization Status | Naturalized |
| Occupation | Machinist |
| Industry | Rail road |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 1800 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
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 William Campbell across 5 US Census years (1900, 1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Robert Campbell (~0.92 confidence) and father Robert Campbell (~0.92 confidence) and father Robert Campbell (~0.92 confidence) and father Robert Campbell (~0.92 confidence) and mother James Campbell (~0.92 confidence) and mother Jane Campbell (~0.92 confidence) and mother Jane Campbell (~0.92 confidence). The pedigree spans 1 generation with 7 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Robert Campbell
b. ~1855
Source father
● Household
· direct · ~0.92
Father
Robert Campbell
b. ~1855
Source father
● Household
· direct · ~0.92
Father
Robert Campbell
b. ~1855
Source father
● Household
· direct · ~0.92
Father
Robert Campbell
b. ~1855
Source father
● Household
· direct · ~0.92
Mother
James Campbell
b. ~1857
Source mother
● Household
· direct · ~0.92
Mother
Jane Campbell
b. ~1853
Source mother
● Household
· direct · ~0.92
Mother
Jane Campbell
b. ~1868
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Campbell
Son · 1940 · age 58 · b. ~1882 · 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
30 people indexed on this census page (nara:1940:m-t0627-03415-00061)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Brady E Inman | 45 | Head | Brakeman | Pennsylvania |
| 2 | Mary E Inman | 34 | Wife | — | Pennsylvania |
| 3 | Brady E Jr Inman | 15 | Son | — | Pennsylvania |
| 4 | John W Inman | 11 | Son | — | Pennsylvania |
| 5 | William Hammond | 55 | Head | Car Helper | Pennsylvania |
| 6 | Jane E Hammond | 53 | Wife | — | Pennsylvania |
| 7 | John G Pahel | 50 | Head | Conductor | Pennsylvania |
| 8 | Myrtle S Pahel | 45 | Wife | — | Pennsylvania |
| 9 | William Mclaughlin | 67 | Lodger | Watchman | Pennsylvania |
| 10 | Ray Borst | 55 | Head | Electrical Engineer | New York |
| 11 | Margaret Borst | 57 | Wife | — | New York |
| 12 | Andrew J Gorman | 40 | Head | Engineer | Pennsylvania |
| 13 | Elizabeth J Gorman | 42 | Wife | — | Pennsylvania |
| 14 | Andrew J Jr Gorman | 7 | Son | — | Pennsylvania |
| 15 | James Campbell | 83 | Head | — | Scotland |
| 16 | William Campbell THIS PERSON | 58 | Son | Machinist | Scotland |
| 17 | Robert B Singiser | 44 | Head | Clerk | Pennsylvania |
| 18 | Catherine Singiser | 39 | Wife | — | Pennsylvania |
| 19 | Catherine R Singiser | 18 | Daughter | — | Pennsylvania |
| 20 | Margaret S Singiser | 15 | Daughter | — | Pennsylvania |
| 21 | Robert B Jr Singiser | 12 | Son | — | Pennsylvania |
| 22 | James G Singiser | 10 | Son | — | Pennsylvania |
| 23 | Mary Edith Singiser | 2 | Daughter | — | Pennsylvania |
| 24 | Daniel G Heaton | 61 | Head | Conductor | Pennsylvania |
| 25 | Mae Heaton | 53 | Wife | — | Pennsylvania |
| 26 | Blair A Heaton | 20 | Son | — | Pennsylvania |
| 27 | Sara G Heaton | 18 | Daughter | — | Pennsylvania |
| 28 | Ruth E Heaton | 17 | Daughter | — | Pennsylvania |
| 29 | Hugh C Bircher | 58 | Head | Machinist | Pennsylvania |
| 30 | Nellie M Bircher | 58 | Wife | — | Ohio |
Pedigree Summary
William
Gen 1 · 7 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)