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John Mack — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Blair-County, Pennsylvania
Our Model Tree links this John Mack across the 1930 and 1940 US Censuses in Blair-County, Pennsylvania (XGBoost, ~Confirmed) — first a son (b.~1926), then head of a 10-person household.
Age 14
b. ~1926
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Blair-County, Pennsylvania |
| Surname | Mack |
| Given Name | John |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Altoona |
| 1935 Residence (County) | Blair |
| Additional Details | |
| Highest Grade | H-1 |
| 1935 Residence | Same house |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Altoona |
| Est. Birth Year | ~1926 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Donald Mack | Son | — | 10 | ~1930 |
| Howard Mack | Head | — | 35 | ~1905 |
| Irene Mack | Spouse | — | 35 | ~1905 |
| Charles Mack | Son | — | 3 | ~1937 |
| Thomas Mack | Son | — | 1 | ~1939 |
| Helen Mack | Daughter | — | 13 | ~1927 |
| John Mack | Son | — | 14 | ~1926 |
| Robert Mack | Son | — | 15 | ~1925 |
| Gerald Mack | Son | — | 8 | ~1932 |
| Janet Mack | Daughter | — | 5 | ~1935 |
Census Appearances
1930
Blair, Pennsylvania
Son, age 4
Blair, Pennsylvania · implied b. ~1926 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mack |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Age at First Marriage | 4 |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Blair-County, Pennsylvania
Son, age 14
Blair-County, Pennsylvania · implied b. ~1926 — 10 household members
| Surname | Mack |
| Given Name | John |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Altoona |
| 1935 Residence (County) | Blair |
| Highest Grade | H-1 |
| 1935 Residence | Same house |
| 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 Mack across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Mack
Son · 1940 · age 14 · b. ~1926 · Pennsylvania
★ You are viewing this record
Sibling
Thomas Mack
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Mack
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Mack
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gerald Mack
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Donald Mack
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Janet Mack
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Mack
Sibling · 1940 · age 3
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
40 people indexed on this census page (nara:1940:m-t0627-03438-00481)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | George W. Clifford | 38 | head | Repairman | Pennsylvania |
| 42 | Ella Clifford | 38 | wife | — | Pennsylvania |
| 43 | Betty Clifford | 17 | daughter | New Worker | Pennsylvania |
| 44 | George Clifford | 16 | son | New Worker | Pennsylvania |
| 45 | Dorothy Clifford | 13 | daughter | — | Pennsylvania |
| 46 | Adrienne Clifford | 7 | daughter | — | Pennsylvania |
| 47 | Anthony Pannone | 57 | head | Helper | Italy |
| 48 | Julia Pannone | 46 | wife | — | Pennsylvania |
| 49 | Mary G. Pannone | 19 | daughter | — | Pennsylvania |
| 50 | Emilia Pannone | 17 | daughter | — | Pennsylvania |
| 51 | Sucretia Fiore | 37 | sister-in-law | Corsetier | Pennsylvania |
| 52 | Joseph Fiore | 19 | nephew | Janitor | Pennsylvania |
| 53 | Frank Torrens | 52 | head | Machinist | Pennsylvania |
| 54 | Nellie Torrens | 54 | sister | — | Pennsylvania |
| 55 | Delia Brief | 55 | head | — | Pennsylvania |
| 56 | George J. Carters | 49 | nephew | Helper | Pennsylvania |
| 57 | Harvey Cummings | 13 | son | — | Pennsylvania |
| 58 | Clinton Steyler | 41 | head | News Stand | Pennsylvania |
| 59 | Frances Steyler | 38 | wife | — | Pennsylvania |
| 60 | Melvin Steyler | 18 | son | — | Pennsylvania |
| 61 | Howard Mack | 35 | head | Helper | Pennsylvania |
| 62 | Irene Mack | 35 | wife | — | Pennsylvania |
| 63 | Robert Mack | 15 | son | — | Pennsylvania |
| 64 | John Mack THIS PERSON | 14 | son | — | Pennsylvania |
| 65 | Helen L. Mack | 13 | daughter | — | Pennsylvania |
| 66 | Donald Mack | 10 | son | — | Pennsylvania |
| 67 | Gerald Mack | 8 | son | — | Pennsylvania |
| 68 | Janet Mack | 5 | daughter | — | Pennsylvania |
| 69 | Charles Mack | 3 | son | — | Pennsylvania |
| 70 | Thomas Mack | 1 | son | — | Pennsylvania |
| 71 | John Pricztacz | 64 | head | Machinist | Hungary |
| 72 | Agnes Pricztacz | 54 | wife | — | Hungary |
| 73 | Mary Agnes Beard | 50 | head | Seamstress | Pennsylvania |
| 74 | Mary Runeman | 50 | partner | Labor | Pennsylvania |
| 75 | Russell Fagan | 40 | head | Presser | Pennsylvania |
| 76 | Mary Fagan | 32 | wife | Clerk | Pennsylvania |
| 77 | Bruce Widney | 57 | head | — | Pennsylvania |
| 78 | Sara Widney | 53 | wife | — | Pennsylvania |
| 79 | Janice Widney | 31 | daughter | — | Pennsylvania |
| 80 | Leo John Eger | 53 | head | Conductor | 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)