DC
David Campbell — 1940 US Census Record
Model Tree available1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this David Campbell across the 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents David & David — first a son (b.~1914), then head of a 6-person household.
Age 26
b. ~1914
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Campbell |
| Given Name | David A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Occupation | Clerk |
| Industry | Retail Cigar Store |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 220 |
| Highest Grade | H 3 |
| 1935 Residence | Same House |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Clerk |
| Township / Ward | Pittsburgh |
| Est. Birth Year | ~1914 |
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 David | Age | Birth yr |
|---|---|---|---|---|
| Raymond Campbell | Son | — | 19 | ~1921 |
| Anna Campbell | Spouse | — | 49 | ~1891 |
| Catherine Campbell | Daughter | — | 16 | ~1924 |
| David Campbell | Son | — | 26 | ~1914 |
| Harry Campbell | Son | — | 24 | ~1916 |
| David Campbell | Head | — | 52 | ~1888 |
Census Appearances
1920
Allegheny, Pennsylvania
Son, age 6
Allegheny, Pennsylvania · implied b. ~1914 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | David Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Germany |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Allegheny, Pennsylvania
Son, age 16
Allegheny, Pennsylvania · implied b. ~1914 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | David A |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Germany |
| Occupation | Package Collector |
| Industry | Department Store |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Son, age 26
Allegheny-County, Pennsylvania · implied b. ~1914 — 6 household members
| Surname | Campbell |
| Given Name | David A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh |
| 1935 Residence (County) | Allegheny |
| Occupation | Clerk |
| Industry | Retail Cigar Store |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 220 |
| Highest Grade | H 3 |
| 1935 Residence | Same House |
| 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 David Campbell across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father David Campbell (~0.92 confidence) and father David Campbell (~0.92 confidence) and mother Anna Campbell (~0.92 confidence) and mother Anna Campbell (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
David Campbell
b. ~1888
Source father
● Household
· direct · ~0.92
Father
David Campbell
b. ~1890
Source father
● Household
· direct · ~0.92
Mother
Anna Campbell
b. ~1891
Source mother
● Household
· direct · ~0.92
Mother
Anna Campbell
b. ~1893
Source mother
● Household
· direct · ~0.92
This person
Anchor record
David Campbell
Son · 1940 · age 26 · b. ~1914 · Pennsylvania
★ You are viewing this record
Sibling
Harry Campbell
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Campbell
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Raymond Campbell
Sibling · 1940 · age 19
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 — 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-t0627-03658-00542)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | David O'Connell | 16 | Son | — | Pennsylvania |
| 42 | John Sr. Stange | 53 | Head | Laborer | Germany |
| 43 | Sarah Stange | 45 | Wife | — | Pennsylvania |
| 44 | William Stange | 21 | Son | — | Pennsylvania |
| 45 | Dolores Stange | 7 | Daughter | — | Pennsylvania |
| 46 | George Frank | 57 | Head | Driver | Pennsylvania |
| 47 | Victoria Frank | 46 | Wife | — | Pennsylvania |
| 48 | Earl Frank | 23 | Son | Chopper | Pennsylvania |
| 49 | Mildred Frank | 19 | Daughter | Salesgirl | Pennsylvania |
| 50 | Gerald Frank | 16 | Son | — | Pennsylvania |
| 51 | William C. Schiffer | 80 | Head | — | Pennsylvania |
| 52 | Catherine Schiffer | 77 | Wife | — | Pennsylvania |
| 53 | Edward Kean | 41 | Head | General Contractor | Pennsylvania |
| 54 | Dorothy Kean | 73 | Mother | — | England |
| 55 | Donald T. Kean | 31 | Brother | Trucker | Pennsylvania |
| 56 | Elizabeth C. Kean | 30 | Sister-in-law | — | Pennsylvania |
| 57 | Margaret Mccallum | 56 | Head | Proprietor | England |
| 58 | John R. Mccallum | 35 | Son | Collector | Pennsylvania |
| 59 | William Mccallum | 34 | Son | Driver | Pennsylvania |
| 60 | Ruby Mccallum | 26 | Daughter-in-law | Server | Pennsylvania |
| 61 | James Mccallum | 19 | Son | Kitchen Boy | Pennsylvania |
| 62 | Paul Cooper | 30 | Head | Cook | Pennsylvania |
| 63 | Katherine Cooper | 24 | Wife | — | New York |
| 64 | Richard Cooper | 1 | Son | — | Pennsylvania |
| 65 | David W. Campbell | 52 | Head | Fireman | Pennsylvania |
| 66 | Anna Campbell | 49 | Wife | — | Germany |
| 67 | David A. Campbell THIS PERSON | 26 | Son | Clerk | Pennsylvania |
| 68 | Harry R. Campbell | 24 | Son | Laborer | Pennsylvania |
| 69 | Raymond F. Campbell | 19 | Son | Errand Boy | Pennsylvania |
| 70 | Catherine Campbell | 16 | Daughter | — | Pennsylvania |
| 71 | Jean Reid | 73 | Head | — | Northumberland |
| 72 | John Wunderlich | 74 | Head | — | Bohemia |
| 73 | Harriet Wunderlich | 56 | Wife | — | Irish Free State |
| 74 | Elmer Frank | 57 | Head | Artistic Worker | Pennsylvania |
| 75 | Violet Frank | 48 | Wife | — | Pennsylvania |
| 76 | Fred Frank | 62 | Lodger | Laborer | Pennsylvania |
| 77 | John F. Noah | 61 | Head | Sawyer | Pennsylvania |
| 78 | Mary F. Noah | 52 | Wife | — | Pennsylvania |
| 79 | David Noah | 29 | Son | Retreader | Pennsylvania |
| 80 | Alfred Noah | 17 | Son | News Worker | Pennsylvania |
Pedigree Summary
David + 3 siblings
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)