MD
Mary Dempsey — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Philadelphia, Pennsylvania
Our Model Tree links this Mary Dempsey across the 1930 and 1940 US Censuses in Philadelphia, Pennsylvania (XGBoost, ~Confirmed) — first a daughter (b.~1930), then head of a 8-person household.
Age 0
b. ~1930
Female
Daughter
Born: Pennsylvania
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Philadelphia, Pennsylvania |
| Surname | Dempsey |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Additional Details | |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Philadelphia City |
| Est. Birth Year | ~1930 |
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.
8 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| John Dempsey | Son | — | 1 | ~1929 |
| Anna Dempsey | Spouse | — | 33 | ~1897 |
| William Dempsey | Son | — | 5 | ~1925 |
| Anna Dempsey | Daughter | — | 7 | ~1923 |
| James Dempsey | Son | — | 9 | ~1921 |
| Mary Dempsey | Daughter | — | ~1930 | |
| James Dempsey | Head | — | 35 | ~1895 |
| Catherine Dempsey | Daughter | — | 3 | ~1927 |
Census Appearances
1930
Philadelphia, Pennsylvania
Daughter, age
Philadelphia, Pennsylvania · implied b. ~1930 — 8 household members
| Surname | Dempsey |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Philadelphia-County, Pennsylvania
Other, age 10
Philadelphia-County, Pennsylvania · implied b. ~1930 — 40 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Dempsey |
| Given Name | Margaret |
| Relationship to Head | Ward |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Philadelphia |
| 1935 Residence (County) | Philadelphia |
| Highest Grade | 3 |
| 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 Dempsey across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Dempsey
Daughter · 1930 · age 0 · b. ~1930 · Pennsylvania
★ You are viewing this record
Sibling
John Dempsey
Sibling · 1930 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Dempsey
Sibling · 1930 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Dempsey
Sibling · 1930 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Dempsey
Sibling · 1930 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Anna Dempsey
Sibling · 1930 · age 7
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
1930 US Federal Census — Philadelphia, Pennsylvania
Open full size
1930 US Federal Census — Philadelphia, Pennsylvania
Page Contents
50 people indexed on this census page (ia:1930:fifteenthcensus00reel2118:0858)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | H Van Williams | 31 | Head | — | Pennsylvania |
| 2 | Mildred Van Williams | 28 | Wife | Saleslady | Pennsylvania |
| 3 | Mildred Van Williams | 2 | Daughter | — | Pennsylvania |
| 4 | John Gotha | 58 | Head | Laborer | Pennsylvania |
| 5 | Mary Gotha | 58 | Wife | — | Pennsylvania |
| 6 | Robert Gotha | 21 | Son | Laborer | Pennsylvania |
| 7 | John Gotha | 18 | Son | Laborer | Pennsylvania |
| 8 | William Gotha | 16 | Son | — | Pennsylvania |
| 9 | Mary Gotha | 14 | Daughter | — | Pennsylvania |
| 10 | William Malone | 34 | Head | Laborer | Pennsylvania |
| 11 | Mary Malone | 32 | Wife | — | Pennsylvania |
| 12 | William Malone | 7 | Son | — | Pennsylvania |
| 13 | John Malone | 5 | Son | — | Pennsylvania |
| 14 | Joseph Dempsey | 33 | Head | Laborer | Pennsylvania |
| 15 | Mary Dempsey | 31 | Wife | — | Pennsylvania |
| 16 | Joseph Dempsey | 9 | Son | — | Pennsylvania |
| 17 | Mary Dempsey | 3 | Daughter | — | Pennsylvania |
| 18 | John Dempsey | 1 | Son | — | Pennsylvania |
| 19 | William Dempsey | 0 | Son | — | Pennsylvania |
| 20 | Catherine Dempsey | 0 | Daughter | — | Pennsylvania |
| 21 | James Dempsey | 35 | Head | Laborer | Pennsylvania |
| 22 | Anna Dempsey | 33 | Wife | — | Pennsylvania |
| 23 | James Dempsey | 9 | Son | — | Pennsylvania |
| 24 | Anna Dempsey | 7 | Daughter | — | Pennsylvania |
| 25 | William Dempsey | 5 | Son | — | Pennsylvania |
| 26 | Catherine Dempsey | 3 | Daughter | — | Pennsylvania |
| 27 | John Dempsey | 1 | Son | — | Pennsylvania |
| 28 | Mary Dempsey THIS PERSON | 0 | Daughter | — | Pennsylvania |
| 29 | — | None | — | — | — |
| 30 | — | None | — | — | — |
| 31 | — | None | — | — | — |
| 32 | — | None | — | — | — |
| 33 | — | None | — | — | — |
| 34 | — | None | — | — | — |
| 35 | — | None | — | — | — |
| 36 | — | None | — | — | — |
| 37 | — | None | — | — | — |
| 38 | — | None | — | — | — |
| 39 | — | None | — | — | — |
| 40 | — | None | — | — | — |
| 41 | — | None | — | — | — |
| 42 | — | None | — | — | — |
| 43 | — | None | — | — | — |
| 44 | — | None | — | — | — |
| 45 | — | None | — | — | — |
| 46 | — | None | — | — | — |
| 47 | — | None | — | — | — |
| 48 | — | None | — | — | — |
| 49 | — | None | — | — | — |
| 50 | — | None | — | — | — |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)