MM
Mary Mccormick — 1940 US Census Record
Model Tree available1940 United States Federal Census · Philadelphia-County, Pennsylvania
Our Model Tree links this Mary Mccormick across the 1920, 1930 and 1940 US Censuses in Philadelphia-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents John & Edna — first a daughter (b.~1911), then head of a 5-person household.
Age 29
b. ~1911
Female
Daughter
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Philadelphia-County, Pennsylvania |
| Surname | McCormick |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Philadelphia |
| 1935 Residence (County) | Philadelphia |
| Additional Details | |
| Occupation | Forelady |
| Industry | Wholesale Bottle Co |
| Class of Worker | PW |
| Hours Worked | 32 |
| Income (1939) | 316 |
| Highest Grade | No 4 |
| 1935 Residence | Same house |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Forelady |
| Township / Ward | Philadelphia |
| Est. Birth Year | ~1911 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Mccormick | Daughter | — | 29 | ~1911 |
| Edna Mccormick | Head | — | 68 | ~1872 |
| Joseph Connor | Other | — | 63 | ~1877 |
| John Evans | Other | — | 60 | ~1880 |
| Andrew Buckley | Other | — | 52 | ~1888 |
Census Appearances
1920
Philadelphia, Pennsylvania
Other, age 12
Philadelphia, Pennsylvania · implied b. ~1908 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCormick |
| Given Name | Mary |
| Relationship to Head | Granddaughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Philadelphia, Pennsylvania
Daughter, age 22
Philadelphia, Pennsylvania · implied b. ~1908 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCormick |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | Top Lady |
| Industry | Hosiery Mill |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Philadelphia-County, Pennsylvania
Daughter, age 29
Philadelphia-County, Pennsylvania · implied b. ~1911 — 5 household members
| Surname | McCormick |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Philadelphia |
| 1935 Residence (County) | Philadelphia |
| Occupation | Forelady |
| Industry | Wholesale Bottle Co |
| Class of Worker | PW |
| Hours Worked | 32 |
| Income (1939) | 316 |
| Highest Grade | No 4 |
| 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 Mccormick across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Mccormick (~0.92 confidence) and mother Edna Mccormick (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Mccormick
b. ~1871
Source father
● Household
· direct · ~0.92
Mother
Edna Mccormick
b. ~1872
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Mccormick
Daughter · 1940 · age 29 · b. ~1911 · Pennsylvania
★ You are viewing this record
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-t0627-03750-00602)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Arthur Coleman | 62 | Lodger | — | Maryland |
| 2 | Anna Henry | 21 | Lodger | Seamstress | Georgia |
| 3 | Wicker Jackson | 41 | Head | Truck Driver | Georgia |
| 4 | Robert Johnson | 28 | Lodger | New Worker | Georgia |
| 5 | Emma Johnson | 21 | Wife | — | Georgia |
| 6 | Hattie Robinson | 32 | Lodger | Housework | Georgia |
| 7 | Ida Gibbins | 23 | Lodger | Housework | Georgia |
| 8 | Edna Mccormick | 68 | Head | — | Ireland |
| 9 | Mary E. Mccormick THIS PERSON | 29 | Daughter | Forelady | Pennsylvania |
| 10 | Andrew Buckley | 52 | Lodger | Laborer | Ireland |
| 11 | Joseph Connor | 63 | Lodger | — | Pennsylvania |
| 12 | John Evans | 60 | Lodger | Orderly | Pennsylvania |
| 13 | Adolphus Alexander | 38 | Head | Laborer | Illinois |
| 14 | Florence Alexander | 31 | Wife | — | Pennsylvania |
| 15 | Henry Hunt | 26 | Head | Mechanist | Virginia |
| 16 | Julia Hunt | 28 | Wife | Cook | Virginia |
| 17 | Fannie Wright | 31 | Sister | Cook | Virginia |
| 18 | Maud Coleman | 29 | Lodger | Pantry Girl | Virginia |
| 19 | Mary Fleming | 35 | Lodger | Housework | S. Carolina |
| 20 | — | None | — | — | — |
| 21 | — | None | — | — | — |
| 22 | Elias Bargans | 45 | Head | Merchant | N. Carolina |
| 23 | Elsie Young | 39 | Lodger | Clerk | Virginia |
| 24 | Ernest Cornfield | 47 | Head | Printer | N. Carolina |
| 25 | Sophie Cornfield | 40 | Wife | — | N. Carolina |
| 26 | Wiley Pickett | 21 | Niece | Housework | N. Carolina |
| 27 | Fred Kennedy | 40 | Head | Truck Driver | Georgia |
| 28 | Jesse Crump | 33 | Lodger | — | S. Carolina |
| 29 | Leda M. Crump | 12 | Daughter | — | Pennsylvania |
| 30 | Gloria Crump | 3 | Daughter | — | Pennsylvania |
| 31 | Barbara Johns | 41 | Lodger | — | Pennsylvania |
| 32 | Jerry Jaywell | 26 | Head | Laborer | Virginia |
| 33 | Charles Jaywell | 24 | Brother | Laborer | Virginia |
| 34 | Robert Jaywell | 20 | Brother | New Worker | Virginia |
| 35 | Mabel Faulkner | 22 | Sister | — | Virginia |
| 36 | Martha Jaywell | 26 | Sister | Housework | Virginia |
| 37 | Rose Jaywell | 24 | Sister | Laborer | S. Carolina |
| 38 | John Jaywell | 18 | Brother | Clerk | Virginia |
| 39 | Floyd Jaywell | 16 | Brother | — | Virginia |
| 40 | Charles Faulkner | 31 | Brother in law | Laborer | Virginia |
Pedigree Summary
Mary
Gen 1 · 2 parents
~0.92
Max depth 4 (1900–1950 window)
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)