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Mary Blackburn — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Philadelphia-County, Pennsylvania
Our Model Tree links this Mary Blackburn across the 1930 and 1940 US Censuses in Philadelphia-County, Pennsylvania (XGBoost, ~Confirmed) — first a head (b.~1884), then head of a 7-person household.
Age 56
b. ~1884
Female
Head
Born: Pennsylvania
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Philadelphia-County, Pennsylvania |
| Surname | Blackburn |
| Given Name | Mary E. G. |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 56 |
| Marital Status | Widowed |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Philadelphia |
| 1935 Residence (County) | Philadelphia |
| Additional Details | |
| Occupation | Saleslady |
| Industry | Department Store |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 300 |
| Highest Grade | No 8 |
| 1935 Residence | Same House |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Saleslady |
| Township / Ward | Philadelphia |
| 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 |
|---|---|---|---|---|
| Esther Blackburn | Daughter | — | 33 | ~1907 |
| Mary Blackburn | Head | — | 56 | ~1884 |
| George Blackburn | Son | — | 18 | ~1922 |
| Jean Donahue | Other | — | 19 | ~1921 |
| Howard Blackburn | Son | — | 31 | ~1909 |
| Lois Blackburn | Daughter | — | 15 | ~1925 |
| Ruth Blackburn | Daughter | — | 23 | ~1917 |
Census Appearances
1930
Philadelphia, Pennsylvania
Head, age 46
Philadelphia, Pennsylvania · implied b. ~1884 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blackburn |
| Given Name | Mary E. |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 46 |
| Marital Status | Widowed |
| Birthplace | Pennsylvania |
| Age at First Marriage | 21 |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | New Jersey |
| Occupation | Teacher |
| Industry | Public School |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 7000 |
| Radio Set | R |
| Veteran | No |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Philadelphia-County, Pennsylvania
Head, age 56
Philadelphia-County, Pennsylvania · implied b. ~1884 — 7 household members
| Surname | Blackburn |
| Given Name | Mary E. G. |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 56 |
| Marital Status | Widowed |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Philadelphia |
| 1935 Residence (County) | Philadelphia |
| Occupation | Saleslady |
| Industry | Department Store |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 300 |
| Highest Grade | No 8 |
| 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 Blackburn across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Blackburn
Head · 1940 · age 56 · b. ~1884 · 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 — Philadelphia-County, Pennsylvania
Open full size
1940 US Federal Census — Philadelphia-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03699-00179)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Catherine M Gribbin | 10 | Daughter | — | Pennsylvania |
| 2 | Hooper W. Mattis | 61 | Head | Proprietor | Pennsylvania |
| 3 | Myrtle Q. Mattis | 69 | Wife | — | Pennsylvania |
| 4 | Myrtle Jr. Mattis | 21 | Daughter | — | Pennsylvania |
| 5 | Florence Wright | 67 | Sister-in-law | — | Pennsylvania |
| 6 | Mary E. G. Blackburn THIS PERSON | 56 | Head | Saleslady | Pennsylvania |
| 7 | Esther S. Blackburn | 33 | Daughter | Teacher | Pennsylvania |
| 8 | Howard W. Blackburn | 31 | Son | Minister | Pennsylvania |
| 9 | Ruth M. Blackburn | 23 | Daughter | — | Pennsylvania |
| 10 | George T. Blackburn | 18 | Son | Pressman | Pennsylvania |
| 11 | Lois E. Blackburn | 15 | Daughter | — | Pennsylvania |
| 12 | Jean H. Donahue | 19 | Niece | Stenographer | Pennsylvania |
| 13 | Bertha S. Ridler | 52 | Head | Mender | Pennsylvania |
| 14 | Florence Ridler | 44 | Sister | — | Pennsylvania |
| 15 | Katherine Frontino | 43 | Boarder | Weaver | Pennsylvania |
| 16 | Robert P. Corley | 54 | Head | Civil Engineer | Pennsylvania |
| 17 | Elizabeth Corley | 54 | Wife | — | Pennsylvania |
| 18 | Robert Jr. Corley | 25 | Son | Chemist | New Jersey |
| 19 | Ruth Corley | 23 | Daughter | Secretary | New Jersey |
| 20 | Edith Corley | 19 | Daughter | — | Pennsylvania |
| 21 | Helen Corley | 18 | Daughter | — | Pennsylvania |
| 22 | Anne Bottomley | 84 | Mother-in-law | — | Maine |
| 23 | William H. Cook | 63 | Head | Decorative Painter | Maryland |
| 24 | Martha C. Cook | 63 | Wife | — | Pennsylvania |
| 25 | Charles W. Cook | 42 | Son | Decorative Painter | Pennsylvania |
| 26 | Eleanor S. Cook | 42 | Daughter-in-law | — | Pennsylvania |
| 27 | William C. Cook | 16 | Grand-son | — | Pennsylvania |
| 28 | Marcia W. Cook | 9 | Grand-child | — | Pennsylvania |
| 29 | Edith M. Kyros | 35 | Head | Paper Sorting | Pennsylvania |
| 30 | Edith Kyros | 63 | Mother | — | Pennsylvania |
| 31 | Calvin Kyros | 22 | Brother | New Worker | Pennsylvania |
| 32 | A. Albert May | 33 | Head | Plumber | Pennsylvania |
| 33 | Anna S. May | 30 | Wife | — | Pennsylvania |
| 34 | Robert May | 8 | Son | — | Pennsylvania |
| 35 | Herbert W. May | 6 | Son | — | Pennsylvania |
| 36 | Evelyn May | 4 | Daughter | — | Pennsylvania |
| 37 | Joseph Kandra | 48 | Head | Pattern Maker | Pennsylvania |
| 38 | Anna S. Kandra | 48 | Wife | — | Pennsylvania |
| 39 | Anna Kandra | 23 | Daughter | Stenographer | Pennsylvania |
| 40 | Fred Kandra | 22 | Son | Stenographer | 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)