JH
John Hart — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this John Hart across the 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed) — first a head (b.~1875), then head of a 5-person household.
Age 65
b. ~1875
Male
Head
Born: New York
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Hart |
| Given Name | John J |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 65 |
| Marital Status | Married |
| Birthplace | New York |
| 1935 Residence (City) | Pittsburgh |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Occupation | Superintendent |
| Industry | WPA |
| Class of Worker | GW |
| Hours Worked | 30 |
| Income (1939) | 1200 |
| Highest Grade | No 6 |
| 1935 Residence | Same Place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
| Occupation | Superintendent |
| Township / Ward | Pittsburgh |
| Est. Birth Year | ~1875 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Elizabeth Hart | Daughter | — | 28 | ~1912 |
| Cora Hart | Daughter | — | 30 | ~1910 |
| John Hart | Head | — | 65 | ~1875 |
| David Hart | Son | — | 25 | ~1915 |
| Johana Hart | Spouse | — | 60 | ~1880 |
Census Appearances
1920
Allegheny, Pennsylvania
Head, age 46
Allegheny, Pennsylvania · implied b. ~1874 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hart |
| Given Name | John J |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 46 |
| Marital Status | Married |
| Birthplace | New York |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Contractor |
| Industry | General |
| Class of Worker | Emp |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | O |
| Home Free/Mortgaged | F |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1930
Allegheny, Pennsylvania
Head, age 56
Allegheny, Pennsylvania · implied b. ~1874 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hart |
| Given Name | John J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 56 |
| Marital Status | Married |
| Birthplace | New York |
| Age at First Marriage | 31 |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Occupation | Contractor |
| Industry | Self |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 45,000 |
| Radio Set | R |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1940
Allegheny-County, Pennsylvania
Head, age 65
Allegheny-County, Pennsylvania · implied b. ~1875 — 5 household members
| Surname | Hart |
| Given Name | John J |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 65 |
| Marital Status | Married |
| Birthplace | New York |
| 1935 Residence (City) | Pittsburgh |
| 1935 Residence (County) | Allegheny |
| Occupation | Superintendent |
| Industry | WPA |
| Class of Worker | GW |
| Hours Worked | 30 |
| Income (1939) | 1200 |
| Highest Grade | No 6 |
| 1935 Residence | Same Place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
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 John Hart across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Hart
Head · 1940 · age 65 · b. ~1875 · 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
34 people indexed on this census page (nara:1940:m-t0627-03655-01002)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Adelle Dickman | 25 | Daughter | — | Pennsylvania |
| 2 | Carl W Brown | 43 | Head | Director Of Sales | Pennsylvania |
| 3 | Margaretta Brown | 39 | Wife | — | Pennsylvania |
| 4 | Carl W Jr Brown | 12 | Son | — | Pennsylvania |
| 5 | Richard L Brown | 10 | Son | — | Pennsylvania |
| 6 | Mary Patricia Brown | 9 | Daughter | — | Pennsylvania |
| 9 | Mary B Verner | 49 | Head | — | New Jersey |
| 10 | Mathilda Barnes | 55 | Head | — | Pennsylvania |
| 11 | Margaretta Connelly | 57 | Lodger | Maid | Scotland |
| 12 | Adam W Schmitt | 62 | Lodger | Painter | Pennsylvania |
| 16 | C Raymond Russell | 39 | Head | Clerk | Pennsylvania |
| 17 | Mildred G Russell | 38 | Wife | — | Pennsylvania |
| 18 | Barbara Anne Russell | 12 | Daughter | — | Pennsylvania |
| 19 | Charles W Bauer | 63 | Father-in-law | — | Pennsylvania |
| 20 | Emma Bauer | 62 | Mother-in-law | — | Germany |
| 21 | Helena Brachoff | 56 | Lodger | Music Teacher | Pennsylvania |
| 22 | Nora B Sheehan | 59 | Lodger | Telegraph Operator | Pennsylvania |
| 23 | Anna Julia Schuette | 54 | Lodger | Stenographer | New York |
| 24 | Zelma A Wright | 56 | Lodger | Registered Nurse | California |
| 25 | James A Dr Blair | 46 | Head | Physician | Pennsylvania |
| 26 | Florence Blair | 42 | Wife | — | Delaware |
| 27 | James A Jr Blair | 7 | Son | — | Pennsylvania |
| 28 | Sidney Blair | 5 | Son | — | Pennsylvania |
| 29 | Joseph E Newman | 48 | Brother-in-law | Civil Engineer | Delaware |
| 31 | Genevieve Ryan | 58 | Head | Landlady | Pennsylvania |
| 32 | John J Ryan | 33 | Son | — | Pennsylvania |
| 33 | Genevieve Ryan | 29 | Daughter | New Work Clerk | Pennsylvania |
| 34 | Marie D Sullivan | 77 | Lodger | — | Vermont |
| 35 | Anna B Miller | 59 | Lodger | — | Pennsylvania |
| 36 | John J Hart THIS PERSON | 65 | Head | Superintendent | New York |
| 37 | Johana Hart | 60 | Wife | — | Pennsylvania |
| 38 | Cora Hart | 30 | Daughter | Salesgirl | New York |
| 39 | Elizabeth Hart | 28 | Daughter | Secretary | New York |
| 40 | David Hart | 25 | Son | Part Owner | New York |
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)