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Mary Mcgrath — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Mary Mcgrath across the 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed) — first a head (b.~1884), then head of a 7-person household.
Age 56
b. ~1884
Female
Head
Born: England
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | McGrath |
| Given Name | Mary A. |
| Relationship to Head | head |
| Sex | F |
| Color / Race | White |
| Age | 56 |
| Marital Status | Widowed |
| Birthplace | England |
| 1935 Residence (City) | Tarentum |
| 1935 Residence (County) | Allegheny |
| Naturalization Status | Alien |
| Additional Details | |
| Highest Grade | No 6 |
| 1935 Residence | Penna |
| Birth Country | England |
| Birthplace (normalized) | england |
| Township / Ward | Frazers Township |
| Est. Birth Year | ~1884 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Mcgrath | Daughter | — | 7 | ~1933 |
| Mary Mcgrath | Head | — | 56 | ~1884 |
| Henry Mcgrath | Son | — | 16 | ~1924 |
| Joseph Mcgrath | Son | — | 20 | ~1920 |
| Robert Mcgrath | Son | — | 14 | ~1926 |
| Thomas Mcgrath | Son | — | 11 | ~1929 |
| John Mcgrath | Son | — | 19 | ~1921 |
Census Appearances
1920
Allegheny, Pennsylvania
Spouse, age 35
Allegheny, Pennsylvania · implied b. ~1885 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McGrath |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | England |
| Year of Immigration | 1913 |
| Naturalization Status | Alien |
| Father's Birthplace | England |
| Mother's Birthplace | England |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth Country | England |
| Birthplace (normalized) | england |
1930
Allegheny, Pennsylvania
Other, age 45
Allegheny, Pennsylvania · implied b. ~1885 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McGrath |
| Given Name | Mary Ann |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | England |
| Naturalization Status | Naturalized |
| Year of Immigration | 1913 |
| Age at First Marriage | 18 |
| Father's Birthplace | England |
| Mother's Birthplace | England |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth Country | England |
| Birthplace (normalized) | england |
1940
Allegheny-County, Pennsylvania
Head, age 56
Allegheny-County, Pennsylvania · implied b. ~1884 — 7 household members
| Surname | McGrath |
| Given Name | Mary A. |
| Relationship to Head | head |
| Sex | F |
| Color / Race | White |
| Age | 56 |
| Marital Status | Widowed |
| Birthplace | England |
| 1935 Residence (City) | Tarentum |
| 1935 Residence (County) | Allegheny |
| Naturalization Status | Alien |
| Highest Grade | No 6 |
| 1935 Residence | Penna |
| Birth Country | England |
| Birthplace (normalized) | england |
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 Mary Mcgrath across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Mcgrath
Head · 1940 · age 56 · b. ~1884 · 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-t0627-03404-00474)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | William Thomson | 3 | son | — | Penna |
| 42 | James Thomson | 1 | son | — | Penna |
| 43 | Charles Barry | 48 | head | Laborer | Penna |
| 44 | Enda|Enid Barry | 43 | wife | — | New Jersey |
| 45 | Earl Mason | 32 | head | Laborer | Penna |
| 46 | Agnes Jones | 32 | housekeeper | Housework | Penna |
| 47 | Joseph Slivon | 37 | head | Moulder | Penna |
| 48 | Mary Slivon | 29 | wife | — | Penna |
| 49 | Mary A. Slivon | 0 | daughter | — | Penna |
| 50 | George Glaister | 42 | head | Steel Worker | Penna |
| 51 | Martha Glaister | 29 | wife | — | Penna |
| 52 | Robert Glaister | 12 | son | — | Penna |
| 53 | William Glaister | 10 | son | — | Penna |
| 54 | Donald Glaister | 8 | son | — | Penna |
| 55 | Dorothy Glaister | 5 | daughter | — | Penna |
| 56 | James Mcgrath | 33 | head | Painter | England |
| 57 | Alice Mcgrath | 28 | wife | — | Penna |
| 58 | Irene Mcgrath | 11 | daughter | — | Penna |
| 59 | Margaret Mcgrath | 7 | daughter | — | Penna |
| 60 | James Mcgrath | 6 | son | — | Penna |
| 61 | Frank Mcgrath | 2 | son | — | Penna |
| 62 | Harold Mcgrath | 0 | son | — | Penna |
| 63 | John H. Huey | 75 | head | Barber | Penna |
| 64 | Fred Hawkes | 52 | head | Painter | Germany |
| 65 | Mary A. Mcgrath THIS PERSON | 56 | head | — | England |
| 66 | Joseph Mcgrath | 20 | son | Laborer | Penna |
| 67 | John Mcgrath | 19 | son | New Worker | Penna |
| 68 | Henry Mcgrath | 16 | son | — | Penna |
| 69 | Robert Mcgrath | 14 | son | — | Penna |
| 70 | Thomas Mcgrath | 11 | son | — | Penna |
| 71 | Mary Mcgrath | 7 | daughter | — | Penna |
| 72 | Charles A. Hazlett | 57 | head | Moulder | Penna |
| 73 | Tillie Hazlett | 55 | wife | — | Penna |
| 74 | Betty M. Hazlett | 15 | daughter | — | Penna |
| 75 | Rosalie Bayer | 11 | granddaughter | — | Penna |
| 76 | George Bayer | 10 | grandson | — | Penna |
| 77 | Frances Bayer | 8 | granddaughter | — | Penna |
| 78 | Frank E. Grimm | 40 | head | Bricklayer | Penna |
| 79 | Blanche Grimm | 33 | wife | — | Penna |
| 80 | Charles Grimm | 10 | son | — | Penna |
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)