MH
Mary Harrington — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Philadelphia-County, Pennsylvania
Our Model Tree links this Mary Harrington across the 1930 and 1940 US Censuses in Philadelphia-County, Pennsylvania (XGBoost, ~Confirmed) — first a daughter (b.~1923), then head of a 11-person household.
Age 17
b. ~1923
Female
Daughter
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Philadelphia-County, Pennsylvania |
| Surname | Harrington |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Philadelphia |
| 1935 Residence (County) | Philadelphia |
| Additional Details | |
| Occupation | 43 |
| Industry | New Worker |
| Highest Grade | Hs 2 |
| 1935 Residence | Same house |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | 43 |
| Township / Ward | Philadelphia |
| Est. Birth Year | ~1923 |
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.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Margaret Harrington | Daughter | — | 9 | ~1931 |
| Mary Harrington | Daughter | — | 17 | ~1923 |
| Catherine Harrington | Daughter | — | 13 | ~1927 |
| Regina Harrington | Daughter | — | 14 | ~1926 |
| Andrew Harrington | Head | — | 48 | ~1892 |
| Margaret Harrington | Other | — | 52 | ~1888 |
| John Harrington | Son | — | 6 | ~1934 |
| Francis Harrington | Son | — | 10 | ~1930 |
| Thomas Harrington | Son | — | 21 | ~1919 |
| Joseph Harrington | Son | — | 18 | ~1922 |
| Anne Harrington | Spouse | — | 46 | ~1894 |
Census Appearances
1930
Delaware, Pennsylvania
Other, age 6
Delaware, Pennsylvania · implied b. ~1924 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Harrington |
| Given Name | Mary |
| Relationship to Head | Granddaughter |
| Sex | F |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Delaware |
| Mother's Birthplace | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Philadelphia-County, Pennsylvania
Daughter, age 17
Philadelphia-County, Pennsylvania · implied b. ~1923 — 11 household members
| Surname | Harrington |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Philadelphia |
| 1935 Residence (County) | Philadelphia |
| Occupation | 43 |
| Industry | New Worker |
| Highest Grade | Hs 2 |
| 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 Mary Harrington across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Harrington
Daughter · 1940 · age 17 · b. ~1923 · Pennsylvania
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Sibling
Francis Harrington
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Harrington
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Harrington
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Regina Harrington
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Harrington
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Harrington
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Harrington
Sibling · 1940 · age 21
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 — Philadelphia-County, Pennsylvania
Open full size
1940 US Federal Census — Philadelphia-County, Pennsylvania
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-03702-00554)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | James Mulloy | 57 | Head | Conductor | Eire |
| 2 | Marie Mulloy | 57 | Wife | — | Eire |
| 3 | Leon Flores | 25 | Son | Grocery Clerk | Pennsylvania |
| 4 | Elizabeth Flores | 23 | Daughter | Dept. Of Coll. | Pennsylvania |
| 5 | Maurice Flores | 20 | Son | 36 | Pennsylvania |
| 6 | Winifred Flores | 11 | Daughter | — | Pennsylvania |
| 7 | John Neville | 54 | Head | Motorman | Eire |
| 8 | Elizabeth Neville | 56 | Wife | — | Eire |
| 9 | Mary Neville | 22 | Daughter | — | Pennsylvania |
| 10 | James Neville | 19 | Son | 30 | Pennsylvania |
| 11 | E. Marvin De Mott | 58 | Head | Transportation Clerk | Pennsylvania |
| 12 | Elizabeth De Mott | 52 | Wife | — | Pennsylvania |
| 13 | Elizabeth De Mott | 26 | Daughter | Labeler & Filler | Pennsylvania |
| 14 | William Burmeister | 68 | Head | Watchman | Pennsylvania |
| 15 | Ella Burmeister | 60 | Wife | — | Pennsylvania |
| 16 | Gladys Burmeister | 33 | Daughter | 13 | Pennsylvania |
| 17 | Mary Burmeister | 14 | Granddaughter | — | Pennsylvania |
| 18 | Margaret Clement | 31 | Head | — | Northern Ireland |
| 19 | Marguerite Clement | 11 | Daughter | — | Pennsylvania |
| 20 | Charles Clement | 8 | Son | — | Pennsylvania |
| 21 | John Clement | 4 | Son | — | Pennsylvania |
| 22 | Rosanne Clement | 2 | Daughter | — | Pennsylvania |
| 23 | Andrew J. Harrington | 48 | Head | Painter | Pennsylvania |
| 24 | Anne Harrington | 46 | Wife | — | Pennsylvania |
| 25 | Thomas Harrington | 21 | Son | Yes | Pennsylvania |
| 26 | Joseph Harrington | 18 | Son | 91 | Pennsylvania |
| 27 | Mary Harrington THIS PERSON | 17 | Daughter | 43 | Pennsylvania |
| 28 | Regina Harrington | 14 | Daughter | — | Pennsylvania |
| 29 | Catherine Harrington | 13 | Daughter | — | Pennsylvania |
| 30 | Francis Harrington | 10 | Son | — | Pennsylvania |
| 31 | Margaret Harrington | 9 | Daughter | — | Pennsylvania |
| 32 | John Harrington | 6 | Son | — | Pennsylvania |
| 33 | Margaret P. Harrington | 52 | Sister | Shipping Clerk | Pennsylvania |
| 34 | Patrick, Sr. O'Connor | 75 | Head | — | Eire |
| 35 | Patrick, Jr. O'Connor | 38 | Son | 2 | Pennsylvania |
| 36 | Barbara O'Connor | 33 | Daughter-in-law | — | Pennsylvania |
| 37 | Patrick O'Connor | 8 | Grandson | — | Pennsylvania |
| 38 | Barbara O'Connor | 7 | Granddaughter | — | Pennsylvania |
| 39 | Richard O'Connor | 6 | Grandson | — | 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)