JK
John Kirk — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this John Kirk across the 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed) — first a head (b.~1897), then head of a 8-person household.
Age 43
b. ~1897
Male
Head
Born: Maryland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Kirk |
| Given Name | John J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 43 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Wilmerding Boro |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Occupation | Clerk |
| Industry | Air Brake Co. Factory |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1300 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Clerk |
| Township / Ward | Wilmerding Boro |
| Est. Birth Year | ~1897 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Leo Kirk | Son | — | 1 | ~1939 |
| Thomas Kirk | Son | — | 15 | ~1925 |
| Leona Kirk | Daughter | — | 8 | ~1932 |
| John Kirk | Head | — | 43 | ~1897 |
| Ethel Kirk | Daughter | — | 17 | ~1923 |
| Ella Kirk | Spouse | — | 41 | ~1899 |
| Robert Kirk | Son | — | 13 | ~1927 |
| John Kirk | Son | — | 19 | ~1921 |
Census Appearances
1930
Allegheny, Pennsylvania
Son, age 33
Allegheny, Pennsylvania · implied b. ~1897 — 12 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kurke |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 33 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Scotland |
| Mother's Birthplace | England |
| Occupation | Machine Hand |
| Industry | Air Brakes |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Allegheny-County, Pennsylvania
Head, age 43
Allegheny-County, Pennsylvania · implied b. ~1897 — 8 household members
| Surname | Kirk |
| Given Name | John J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 43 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Wilmerding Boro |
| 1935 Residence (County) | Allegheny |
| Occupation | Clerk |
| Industry | Air Brake Co. Factory |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1300 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
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 Kirk across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Kirk
Head · 1940 · age 43 · b. ~1897 · 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
40 people indexed on this census page (nara:1940:m-t0627-03421-00876)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | James W. Moffat | 37 | Head | Laborer | England |
| 42 | Winifred D. Moffat | 36 | Wife | — | England |
| 43 | Robert Warrington | 59 | Father-in-law | Laborer | England |
| 44 | Patricia Moffat | 8 | daughter | — | Pennsylvania |
| 45 | John Neidhardt | 48 | Head | Foreman | Pennsylvania |
| 46 | Louise D. Neidhardt | 37 | Wife | — | Pennsylvania |
| 47 | John Jr. Neidhardt | 16 | Son | — | Pennsylvania |
| 48 | Marlene Neidhardt | 6 | daughter | — | Pennsylvania |
| 49 | Earl Hoffstot | 48 | Head | Laborer | Pennsylvania |
| 50 | Luella D. Hoffstot | 43 | Wife | — | Pennsylvania |
| 51 | Harvey Hoffstot | 25 | son | Electrician | Pennsylvania |
| 52 | George Hoffstot | 17 | son | — | Pennsylvania |
| 53 | Violet Hoffstot | 23 | daughter-in-law | — | Pennsylvania |
| 54 | Arthur Boot | 57 | Head | Drill Press | England |
| 55 | Sara D. Boot | 53 | Wife | — | Pennsylvania |
| 56 | Walter Boot | 23 | son | — | Pennsylvania |
| 57 | William Boot | 20 | son | — | Pennsylvania |
| 58 | John J. Kirk THIS PERSON | 43 | Head | Clerk | Maryland |
| 59 | Ella D. Kirk | 41 | Wife | — | Pennsylvania |
| 60 | John Jr. Kirk | 19 | son | Gager | Pennsylvania |
| 61 | Ethel R. Kirk | 17 | daughter | — | Pennsylvania |
| 62 | Thomas Kirk | 15 | son | — | Pennsylvania |
| 63 | Robert Kirk | 13 | son | — | Pennsylvania |
| 64 | Leona Kirk | 8 | daughter | — | Pennsylvania |
| 65 | Leo Kirk | 1 | son | — | Pennsylvania |
| 66 | Louis Mertz | 63 | Head | Machine Hand | Pennsylvania |
| 67 | Lillian D. Mertz | 60 | Wife | — | Pennsylvania |
| 68 | Albert Mertz | 37 | son | Machine Hand | Pennsylvania |
| 69 | Paul Mertz | 12 | Grandson | — | Pennsylvania |
| 70 | Joseph Roberts | 49 | Head | Clerk | Pennsylvania |
| 71 | Margaret D. Roberts | 40 | Wife | — | Pennsylvania |
| 72 | Frank Zimmerman | 48 | Head | Laborer | Germany |
| 73 | Margaret D. Zimmerman | 44 | Wife | — | Pennsylvania |
| 74 | Frank Jr. Zimmerman | 22 | son | Laborer | Pennsylvania |
| 75 | Charles Zimmerman | 19 | son | — | Pennsylvania |
| 76 | Edward Zimmerman | 16 | son | — | Pennsylvania |
| 77 | Margaret Zimmerman | 12 | daughter | — | Pennsylvania |
| 78 | Charles Harrison | 63 | Head | Laborer | Pennsylvania |
| 79 | Mary J. Harrison | 61 | Wife | — | Pennsylvania |
| 80 | Melvin Price | 53 | Head | Machinist | 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)