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John Simpson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this John Simpson across the 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed) — first a head (b.~1886), then head of a 3-person household.
Age 54
b. ~1886
Male
Head
Born: Pennsylvania
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Simpson |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 54 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Lincoln Park - Eastwood |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Occupation | Machinist |
| Industry | Westinghouse Electric |
| Class of Worker | PW |
| Income (1939) | 2600 |
| Highest Grade | No 8 |
| 1935 Residence | Same home |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Machinist |
| Township / Ward | Lincoln Park Eastwood |
| Est. Birth Year | ~1886 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Dorothy Simpson | Daughter | — | 21 | ~1919 |
| John Simpson | Head | — | 54 | ~1886 |
| Mazie Simpson | Spouse | — | 52 | ~1888 |
Census Appearances
1920
Allegheny, Pennsylvania
Head, age 33
Allegheny, Pennsylvania · implied b. ~1887 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Simpson |
| Given Name | John M |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 33 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| Father's Birthplace | England |
| Mother's Birthplace | Pennsylvania |
| Occupation | Machinist |
| Industry | Westinghouse Electric Co |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Allegheny, Pennsylvania
Head, age 44
Allegheny, Pennsylvania · implied b. ~1886 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Simpson |
| Given Name | John M. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 44 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| Age at First Marriage | 23 |
| Father's Birthplace | England |
| Mother's Birthplace | Pennsylvania |
| Occupation | Foreman |
| Industry | Machine Shop |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 11,000 |
| Radio Set | R |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Head, age 54
Allegheny-County, Pennsylvania · implied b. ~1886 — 3 household members
| Surname | Simpson |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 54 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Lincoln Park - Eastwood |
| 1935 Residence (County) | Allegheny |
| Occupation | Machinist |
| Industry | Westinghouse Electric |
| Class of Worker | PW |
| Income (1939) | 2600 |
| Highest Grade | No 8 |
| 1935 Residence | Same home |
| 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 John Simpson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Simpson
Head · 1940 · age 54 · b. ~1886 · Pennsylvania
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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-t0627-03414-00368)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Elias Gilliland | 38 | Head | Chemist | Pennsylvania |
| 2 | Elizabeth Gilliland | 38 | Wife | — | Pennsylvania |
| 3 | Edward Gilliland | 2 | Son | — | Pennsylvania |
| 4 | John Simpson THIS PERSON | 54 | Head | Machinist | Pennsylvania |
| 5 | Mazie Simpson | 52 | Wife | Housewife | Pennsylvania |
| 6 | Dorothy Simpson | 21 | Daughter | — | Pennsylvania |
| 7 | Charles Sperling | 31 | Head | Accountant | Pennsylvania |
| 8 | Sarah Sperling | 30 | Wife | — | Pennsylvania |
| 9 | Harry Rambo | 36 | Head | Salesman | Pennsylvania |
| 10 | Frances Rambo | 35 | Wife | Housewife | Pennsylvania |
| 11 | George Detter | 35 | Head | Transfer | Pennsylvania |
| 12 | Irene Detter | 24 | Wife | Housewife | Pennsylvania |
| 13 | Margaret Detter | 4 | Daughter | — | Pennsylvania |
| 14 | Jane Detter | 3 | Daughter | — | Pennsylvania |
| 15 | Osbourne Keown | 47 | Head | Manager | Pennsylvania |
| 16 | Mary Keown | 42 | Wife | Housewife | Pennsylvania |
| 17 | John Healey | 27 | Lodger | Service Man | Pennsylvania |
| 18 | James Kenny | 53 | Head | Carpenter | Scotland |
| 19 | Jessie Kenny | 54 | Wife | — | Scotland |
| 20 | Jack Kenny | 11 | Son | — | Pennsylvania |
| 21 | Henry Eckhardt | 57 | Head | Laborer | Pennsylvania |
| 22 | Cordelia Eckhardt | 55 | Wife | — | Pennsylvania |
| 23 | James Eckhardt | 23 | Son | — | Pennsylvania |
| 24 | Louis Snyder | 40 | Head | Salesman | Pennsylvania |
| 25 | Lucy Snyder | 40 | Wife | Housewife | Pennsylvania |
| 26 | Louis Snyder | 22 | Son | Messenger | Pennsylvania |
| 27 | Marilyn Snyder | 16 | Daughter | — | Pennsylvania |
| 28 | Ignatz Schlesinger | 69 | Head | Real Estate | Hungary |
| 29 | Malvin Schlesinger | 60 | Wife | — | Hungary |
| 30 | Rosa Schlesinger | 39 | Daughter | Social | Hungary |
| 31 | Clara Schlesinger | 35 | Daughter | Laboratory Technician | Hungary |
| 32 | Pauline Koontz | 18 | Maid | Maid | West Virginia |
| 33 | Michael Sharman | 39 | Cousin | Doctor | Austria |
| 34 | Rudolf Sharman | 45 | Cousin | Real Estate | Austria |
| 35 | Randall Bannatyne | 58 | Head | Sales Manager | Pennsylvania |
| 36 | Edna Bannatyne | 51 | Wife | Housewife | Pennsylvania |
| 37 | George Stuber | 69 | Head | Baker | Pennsylvania |
| 38 | Susan Stuber | 68 | Wife | Housewife | Germany |
| 39 | Leona Stuber | 26 | Daughter | Clerk | Pennsylvania |
| 40 | George Stuber | 40 | Son | Clerk | 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)