DC
David Campbell — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Blair-County, Pennsylvania
Our Model Tree links this David Campbell across the 1930 and 1940 US Censuses in Blair-County, Pennsylvania (XGBoost, ~Confirmed) — first a son (b.~1929), then head of a 9-person household.
Age 11
b. ~1929
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Blair-County, Pennsylvania |
| Surname | Campbell |
| Given Name | David |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Altoona |
| 1935 Residence (County) | Blair |
| Additional Details | |
| Highest Grade | No 5 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Altoona |
| Est. Birth Year | ~1929 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to David | Age | Birth yr |
|---|---|---|---|---|
| Regis Campbell | Son | — | 12 | ~1928 |
| Philip Campbell | Son | — | 8 | ~1932 |
| Bernard Campbell | Son | — | 23 | ~1917 |
| James Campbell | Son | — | 17 | ~1923 |
| Paul Campbell | Son | — | 14 | ~1926 |
| David Campbell | Son | — | 11 | ~1929 |
| Robert Campbell | Son | — | 20 | ~1920 |
| Joseph Campbell | Head | — | 57 | ~1883 |
| Marie Campbell | Spouse | — | 49 | ~1891 |
Census Appearances
1930
Blair, Pennsylvania
Son, age 1
Blair, Pennsylvania · implied b. ~1929 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | David |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Blair-County, Pennsylvania
Son, age 11
Blair-County, Pennsylvania · implied b. ~1929 — 9 household members
| Surname | Campbell |
| Given Name | David |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Altoona |
| 1935 Residence (County) | Blair |
| Highest Grade | No 5 |
| 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 David Campbell across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
David Campbell
Son · 1940 · age 11 · b. ~1929 · Pennsylvania
★ You are viewing this record
Sibling
Philip Campbell
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bernard Campbell
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Campbell
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Campbell
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Paul Campbell
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Regis Campbell
Sibling · 1940 · age 12
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 — Blair-County, Pennsylvania
Open full size
1940 US Federal Census — Blair-County, Pennsylvania
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-03438-00666)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Joseph M. Campbell | 57 | Head | Blacksmith | Pennsylvania |
| 42 | Marie B. Campbell | 49 | Wife | — | Pennsylvania |
| 43 | Bernard H. Campbell | 23 | Son | Laborer | Pennsylvania |
| 44 | Robert Campbell | 20 | Son | Laborer | Pennsylvania |
| 45 | James Campbell | 17 | Son | — | Pennsylvania |
| 46 | Paul Campbell | 14 | Son | — | Pennsylvania |
| 47 | Regis Campbell | 12 | Son | — | Pennsylvania |
| 48 | David Campbell THIS PERSON | 11 | Son | — | Pennsylvania |
| 49 | Philip Campbell | 8 | Son | — | Pennsylvania |
| 51 | J. J. Huss | 75 | Head | — | Pennsylvania |
| 52 | Agnes Huss | 69 | Wife | — | Pennsylvania |
| 53 | Lawrence E. Yeates | 69 | Head | — | Pennsylvania |
| 54 | Loralee Beatty | 36 | Cousin | Machinist | Pennsylvania |
| 55 | Orvie Watson | 58 | Head | — | Pennsylvania |
| 56 | Edith Watson | 49 | Wife | — | Pennsylvania |
| 57 | John Watson | 18 | Son | — | Pennsylvania |
| 58 | Harry Green | 68 | Head | Grocer Proprietor | Russia |
| 59 | Rebecca Green | 58 | Wife | Coner | Russia |
| 60 | Rae Green | 33 | Daughter | Coner | Pennsylvania |
| 61 | Ida Green | 31 | Daughter | Saleslady | Pennsylvania |
| 62 | Rose Green | 29 | Daughter | Saleslady | Pennsylvania |
| 63 | Tillie Green | 27 | Daughter | Machinist | Pennsylvania |
| 64 | William A. Brady | 45 | Head | — | New York |
| 65 | Marguerite Brady | 44 | Wife | — | Pennsylvania |
| 66 | Helene Brady | 14 | Daughter | — | Pennsylvania |
| 67 | Elwood Brady | 12 | Son | — | Pennsylvania |
| 68 | Joan Brady | 8 | Daughter | — | Pennsylvania |
| 69 | James D. Boland | 58 | Head | Locomotive Engineer | Pennsylvania |
| 70 | Helene C. Boland | 61 | Wife | — | Pennsylvania |
| 71 | Albert M. Lilly | 12 | Son | — | Pennsylvania |
| 72 | Joseph J. Ronan | 26 | Head | Baker | Pennsylvania |
| 73 | Audrey Ronan | 21 | Wife | Waitress | Pennsylvania |
| 74 | James R. O'Leary | 42 | Head | Attendant | Pennsylvania |
| 75 | Viola Theimer | 60 | Head | — | Pennsylvania |
| 76 | Margaret Miller | 87 | Mother | — | Pennsylvania |
| 78 | Anna M. Mcnamara | 52 | Head | Cook | Pennsylvania |
| 79 | John B. Mcnamara | 27 | Son | Laborer | Pennsylvania |
| 80 | Robert P. Mcnamara | 20 | Son | Laborer | Pennsylvania |
| 81 | John Doran | 56 | Head | Iron Molder | Pennsylvania |
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)