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Mary Walter — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Delaware-County, Pennsylvania
Our Model Tree links this Mary Walter across the 1930 and 1940 US Censuses in Delaware-County, Pennsylvania (XGBoost, ~Confirmed) — first a daughter (b.~1922), then head of a 7-person household.
Age 18
b. ~1922
Female
Daughter
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Delaware-County, Pennsylvania |
| Surname | Walter |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | DARBY borough |
| 1935 Residence (County) | DELAWARE |
| Additional Details | |
| Occupation | New Worker |
| Income (1939) | 0 |
| Highest Grade | No 3/4/20 |
| 1935 Residence | Same Place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | New Worker |
| Township / Ward | Darby Borough |
| Est. Birth Year | ~1922 |
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 |
|---|---|---|---|---|
| Lawrence Walter | Son | — | 6 | ~1934 |
| Mary Walter | Daughter | — | 18 | ~1922 |
| Leonard Walter | Son | — | 2 | ~1938 |
| Marie Walter | Head | — | 35 | ~1905 |
| Ralph Walter | Son | — | 8 | ~1932 |
| Dorothy Walter | Daughter | — | 4 | ~1936 |
| Margaret Walter | Daughter | — | 16 | ~1924 |
Census Appearances
1930
Delaware, Pennsylvania
Daughter, age 7
Delaware, Pennsylvania · implied b. ~1923 — 13 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Walter |
| Given Name | Mary E |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Delaware-County, Pennsylvania
Daughter, age 18
Delaware-County, Pennsylvania · implied b. ~1922 — 7 household members
| Surname | Walter |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | DARBY borough |
| 1935 Residence (County) | DELAWARE |
| Occupation | New Worker |
| Income (1939) | 0 |
| Highest Grade | No 3/4/20 |
| 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 Walter across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Walter
Daughter · 1940 · age 18 · b. ~1922 · Pennsylvania
★ You are viewing this record
Sibling
Ralph Walter
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Walter
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Walter
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Leonard Walter
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lawrence Walter
Sibling · 1940 · age 6
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 — Delaware-County, Pennsylvania
Open full size
1940 US Federal Census — Delaware-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03490-00608)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Madeline F. Riley | 13 | Daughter | — | Pennsylvania |
| 2 | Louis Riley | 10 | Son | — | Pennsylvania |
| 3 | Helen C. Riley | 8 | Daughter | — | Pennsylvania |
| 4 | Edward Riley | 6 | Son | — | Pennsylvania |
| 5 | Helen Wiesenthal | 44 | Sister-in-law | — | Pennsylvania |
| 6 | Moses G. Wiesenthal | 49 | Brother-in-law | Hammer Man | New Jersey |
| 7 | Charles Schaeffer | 31 | Roomer | Pipe Fitter | Pennsylvania |
| 8 | Clarence Houseman | 52 | Head | Plaster | Pennsylvania |
| 9 | C. H. Jr. Houseman | 24 | Son | Checker | Pennsylvania |
| 10 | Edward Houseman | 23 | Son | Bookeeper | Pennsylvania |
| 11 | Hervey Gilbert | 68 | Head | Highway Department | Pennsylvania |
| 12 | Rae M. Gilbert | 60 | Wife | — | Pennsylvania |
| 13 | Joshua L. Heaps | 62 | Head | Maintenance | Pennsylvania |
| 14 | Jennie M. Heaps | 59 | Wife | — | Pennsylvania |
| 15 | Robert Armetrout | 32 | Head | Cook | Alabama |
| 16 | Pauline L. Armetrout | 26 | Wife | — | Pennsylvania |
| 17 | Joan Armetrout | 7 | Daughter | — | Pennsylvania |
| 18 | Robert W. Jr. Armetrout | 4 | Son | — | Pennsylvania |
| 19 | Richard H. Armetrout | 3 | Son | — | Pennsylvania |
| 20 | Pauline L. Armetrout | 2 | Daughter | — | Pennsylvania |
| 21 | Evertte J. Armetrout | 22 | Brother | Oiler | Alabama |
| 22 | Mary Ryan | 40 | Head | — | Pennsylvania |
| 23 | Joseph M. Morphy | 52 | Boarder | Repairman | Pennsylvania |
| 24 | Joseph B. Carlin | 32 | Boarder | Laborer | Pennsylvania |
| 25 | Bridget Carlin | 68 | Boarder | — | Ireland |
| 26 | Marie E. Walter | 35 | Head | — | Pennsylvania |
| 27 | Mary E. Walter THIS PERSON | 18 | Daughter | New Worker | Pennsylvania |
| 28 | Margaret R. Walter | 16 | Daughter | — | Pennsylvania |
| 29 | Ralph J. Walter | 8 | Son | — | Pennsylvania |
| 30 | Lawrence E. Walter | 6 | Son | — | Pennsylvania |
| 31 | Dorothy E. Walter | 4 | Daughter | — | Pennsylvania |
| 32 | Leonard F. Walter | 2 | Son | — | Pennsylvania |
| 33 | Albert Elliot | 51 | Head | Helper | Pennsylvania |
| 34 | Margaret Elliot | 52 | Wife | — | Pennsylvania |
| 35 | Harry Dudley | 41 | Boarder | Driller | England |
| 36 | Viola S. Dudley | 35 | Wife | — | England |
| 37 | John Sr. Lohan | 53 | Head | Stereotype | Ireland |
| 38 | Annie Lohan | 49 | Wife | — | Scotland |
| 39 | Andrew Lohan | 29 | Son | Clerk | Scotland |
| 40 | Sarah Lohan | 27 | Daughter | Seamstress | Scotland |
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)