MI
Mary Irwin — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Blair-County, Pennsylvania
Our Model Tree links this Mary Irwin across the 1930 and 1940 US Censuses in Blair-County, Pennsylvania (XGBoost, ~Confirmed) — first a spouse (b.~1902), then head of a 6-person household.
Age 38
b. ~1902
Female
Spouse
Born: Pennsylvania
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Blair-County, Pennsylvania |
| Surname | Irwin |
| Given Name | Mary E. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Altoona City |
| 1935 Residence (County) | Blair |
| Additional Details | |
| Industry | 0 |
| Class of Worker | No |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Altoona City |
| Est. Birth Year | ~1902 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| David Irwin | Son | — | 14 | ~1926 |
| Mary Irwin | Spouse | — | 38 | ~1902 |
| David Irwin | Head | — | 43 | ~1897 |
| John Irwin | Son | — | 9 | ~1931 |
| Ray Irwin | Son | — | 15 | ~1925 |
| Joseph Irwin | Son | — | 12 | ~1928 |
Census Appearances
1930
Blair, Pennsylvania
Other, age 28
Blair, Pennsylvania · implied b. ~1902 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Irwin |
| Given Name | Mary E |
| Relationship to Head | Daughter-in-law |
| Sex | F |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| Age at First Marriage | 23 |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | Homemaker |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Blair-County, Pennsylvania
Spouse, age 38
Blair-County, Pennsylvania · implied b. ~1902 — 6 household members
| Surname | Irwin |
| Given Name | Mary E. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Altoona City |
| 1935 Residence (County) | Blair |
| Industry | 0 |
| Class of Worker | No |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| 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 Mary Irwin across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Irwin
Spouse · 1940 · age 38 · b. ~1902 · 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 — 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-t0627-03437-00246)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Beverly O'Donnell | 15 | Daughter | — | Pennsylvania |
| 2 | Robert L. Snyder | 57 | Head | Machinist | Pennsylvania |
| 3 | Dorothy Reighard | 24 | Daughter | — | Pennsylvania |
| 4 | Marlene Reighard | 8 | Granddaughter | — | Pennsylvania |
| 5 | Genevieve Reighard | 6 | Granddaughter | — | Pennsylvania |
| 6 | Charles R. Blackburn | 25 | Head | Automobile Mechanic | Pennsylvania |
| 7 | Jean Blackburn | 23 | Wife | — | Pennsylvania |
| 8 | Charles Blackburn | 3 | Son | — | Pennsylvania |
| 9 | Jennie Ebersole | 53 | Mother-in-law | Housework | Pennsylvania |
| 10 | Mary Gorman | 34 | Head | — | Pennsylvania |
| 11 | Virginia Gorman | 10 | Daughter | — | Pennsylvania |
| 12 | Louise Gorman | 8 | Daughter | — | Pennsylvania |
| 13 | W. F. Forney | 79 | Head | Plumber | Pennsylvania |
| 14 | Maeche E. Forney | 67 | Wife | — | England |
| 15 | N. F. Clapper | 49 | Son-in-law | Gang Foreman | Pennsylvania |
| 16 | Mary Clapper | 45 | Daughter | — | Pennsylvania |
| 17 | David Clapper | 9 | Grandson | — | Pennsylvania |
| 18 | — | None | — | — | — |
| 19 | C. Clyde Copley | 48 | Head | Brakeman | Pennsylvania |
| 20 | Mary E. Copley | 39 | Wife | — | Pennsylvania |
| 21 | Caroline Kling | 72 | Mother-in-law | — | Pennsylvania |
| 22 | Clifford E. Mentzer | 43 | Head | Block Operator | Pennsylvania |
| 23 | Estelle Mentzer | 41 | Wife | — | Pennsylvania |
| 24 | Eleanor Mentzer | 18 | Daughter | — | Pennsylvania |
| 25 | Vernet Coffman | 37 | Head | Type Machinist | Pennsylvania |
| 26 | Sylvia Coffman | 37 | Wife | — | Pennsylvania |
| 27 | William Kirstner | 82 | Head | — | Pennsylvania |
| 28 | John W. Kirstner | 58 | Son | Helper | Pennsylvania |
| 29 | A. Mary Kirstner | 49 | Daughter | Supervising Telephone | Pennsylvania |
| 30 | James F. Moore | 63 | Head | Engineer | Pennsylvania |
| 31 | Mary Moore | 64 | Wife | — | Pennsylvania |
| 32 | E. R. Woomer | 41 | Head | Machinist | Pennsylvania |
| 33 | Carrie Woomer | 39 | Wife | — | Pennsylvania |
| 34 | Kenneth Woomer | 4 | Son | — | Ohio |
| 35 | David C. Irwin | 43 | Head | Machinist | Pennsylvania |
| 36 | Mary E. Irwin THIS PERSON | 38 | Wife | — | Pennsylvania |
| 37 | Ray Irwin | 15 | Son | — | Pennsylvania |
| 38 | David Irwin | 14 | Son | — | Pennsylvania |
| 39 | Joseph Irwin | 12 | Son | — | Pennsylvania |
| 40 | John Irwin | 9 | Son | — | 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)