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John Allison — 1940 US Census Record
Model Tree available1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this John Allison across the 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents John & Marie — first a son (b.~1910), then head of a 2-person household.
Age 30
b. ~1910
Male
Son
Born: Montana
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Allison |
| Given Name | John F. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | Montana |
| 1935 Residence (City) | Slippery Rock |
| 1935 Residence (County) | Butler |
| Additional Details | |
| Occupation | glazier |
| Industry | steel mill |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1380 |
| Highest Grade | No 8 |
| 1935 Residence | Pennsylvania |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
| Occupation | Glazier |
| Township / Ward | Mt Lebanon Twp |
| Est. Birth Year | ~1910 |
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.
2 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Mary Allison | Head | — | 58 | ~1882 |
| John Allison | Son | — | 30 | ~1910 |
Census Appearances
1920
Butler, Pennsylvania
Son, age 10
Butler, Pennsylvania · implied b. ~1910 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Allison |
| Given Name | John T. Jr. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Montana |
| Father's Birthplace | Penna. |
| Mother's Birthplace | Penna. |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
1930
Butler, Pennsylvania
Son, age 20
Butler, Pennsylvania · implied b. ~1910 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Allison |
| Given Name | John F |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Montana |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read/Write | Yes |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
1940
Allegheny-County, Pennsylvania
Son, age 30
Allegheny-County, Pennsylvania · implied b. ~1910 — 2 household members
| Surname | Allison |
| Given Name | John F. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | Montana |
| 1935 Residence (City) | Slippery Rock |
| 1935 Residence (County) | Butler |
| Occupation | glazier |
| Industry | steel mill |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1380 |
| Highest Grade | No 8 |
| 1935 Residence | Pennsylvania |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
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 Allison across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Allison (~0.92 confidence) and mother Marie Allison (~0.92 confidence) and mother Mary Allison (~0.92 confidence) and mother Wayne Allison (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Allison
b. ~1881
Source father
● Household
· direct · ~0.92
Mother
Marie Allison
b. ~1883
Source mother
● Household
· direct · ~0.92
Mother
Mary Allison
b. ~1882
Source mother
● Household
· direct · ~0.92
Mother
Wayne Allison
b. ~1882
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Allison
Son · 1940 · age 30 · b. ~1910 · 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-t0627-03411-00616)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Dick J. Workman | 9 | Son | — | Pennsylvania |
| 2 | Robert T. Anderson | 46 | Head | Clerk | Pennsylvania |
| 3 | Gertrude X. Anderson | 45 | Wife | — | Oklahoma |
| 4 | Mildred Anderson | 19 | Daughter | — | Pennsylvania |
| 5 | Wm. A. Chrystal | 47 | Head | Clerk | Pennsylvania |
| 6 | Flora X. Chrystal | 41 | Wife | — | Illinois |
| 7 | Marilyn Chrystal | 15 | Daughter | — | Pennsylvania |
| 8 | William Chrystal | 9 | Son | — | Pennsylvania |
| 9 | Alice Wood | 39 | Head | Stenographer | Pennsylvania |
| 10 | Mary E. Wood | 43 | Sister | Operator | Pennsylvania |
| 11 | Francis Wood | 32 | Brother | Salesman | Pennsylvania |
| 12 | Helen Wood | 28 | Sister-in-law | — | Pennsylvania |
| 13 | Patty Ann Wood | 11 | Niece | — | Pennsylvania |
| 14 | Thomas J. Wood | 7 | Nephew | — | Pennsylvania |
| 15 | Barry L. Wood | 6 | Nephew | — | Pennsylvania |
| 16 | Margaret X. Patterson | 45 | Lodger | — | Pennsylvania |
| 17 | Elmore B. Tallmadge | 34 | Head | Immigration Inspector | New York |
| 18 | Louise M. X. Tallmadge | 31 | Wife | — | Georgia |
| 19 | Lorna L. Tallmadge | 12 | Daughter | — | Florida |
| 20 | Susan Tallmadge | 2 | Daughter | — | Vermont |
| 21 | C. D. Miller | 36 | Head | Electrical Engineer | Michigan |
| 22 | Enid Miller | 32 | Wife | — | Iowa |
| 23 | Robert Miller | 3 | Son | — | Pennsylvania |
| 24 | Clement C. Pickell | 29 | Head | Lighting Engineer | New York |
| 25 | Mary X. Pickell | 26 | Wife | — | New Jersey |
| 26 | John Pickell | 1 | Son | — | New York |
| 27 | Emery Fuller | 43 | Head | Teacher | Wisconsin |
| 28 | Florence X. Fuller | 41 | Wife | — | Wisconsin |
| 29 | Frances Fuller | 13 | Daughter | — | Pennsylvania |
| 30 | Mary M. X. Allison | 58 | Head | — | Pennsylvania |
| 31 | John F. Allison THIS PERSON | 30 | Son | Glazier | Montana |
| 32 | Hugh C. Jr. Forbes | 31 | Head | Engineer | Pennsylvania |
| 33 | Irene V. X. Forbes | 30 | Wife | — | South Dakota |
| 34 | Charles S. Franklin | 33 | Head | Mechanical Engineer | New York |
| 35 | Mary S. X. Franklin | 34 | Wife | — | Iowa |
| 36 | Marilyn Franklin | 7 | Daughter | — | Alabama |
| 37 | Sherry Franklin | 3 | Daughter | — | Tennessee |
| 38 | James F. Mccool | 43 | Head | Clerk | Pennsylvania |
| 39 | Mary Jane X. Mccool | 30 | Wife | — | Pennsylvania |
| 40 | James F. Jr. Mccool | 7 | Son | — | Pennsylvania |
Pedigree Summary
John
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)