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Mary Mccoy — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Mary Mccoy across the 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed) — first a daughter (b.~1926), then head of a 11-person household.
Age 14
b. ~1926
Female
Daughter
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | McCoy |
| Given Name | Mary A. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Highest Grade | Hs 2 |
| 1935 Residence | Same Place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Pittsburgh |
| Est. Birth Year | ~1926 |
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 |
|---|---|---|---|---|
| Mary Mccoy | Daughter | — | 14 | ~1926 |
| Henrietta Mccoy | Daughter | — | 18 | ~1922 |
| Matilda Mccoy | Daughter | — | 12 | ~1928 |
| Susanna Mccoy | Daughter | — | 3 | ~1937 |
| Irvin Mccoy | Head | — | 70 | ~1870 |
| Adeline Leesone | Other | — | 70 | ~1870 |
| Ellis Mccoy | Son | — | 11 | ~1929 |
| Emil Mccoy | Son | — | ~1940 | |
| Irvin Mccoy | Son | — | 14 | ~1926 |
| Elisha Mccoy | Son | — | 8 | ~1932 |
| Susanna Mccoy | Spouse | — | 38 | ~1902 |
Census Appearances
1930
Allegheny, Pennsylvania
Daughter, age 6
Allegheny, Pennsylvania · implied b. ~1924 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCoy |
| Given Name | Mary A |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | South Carolina |
| Mother's Birthplace | South Carolina |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Daughter, age 14
Allegheny-County, Pennsylvania · implied b. ~1926 — 11 household members
| Surname | McCoy |
| Given Name | Mary A. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh |
| 1935 Residence (County) | Allegheny |
| Highest Grade | Hs 2 |
| 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 Mccoy across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Mccoy
Daughter · 1940 · age 14 · b. ~1926 · Pennsylvania
★ You are viewing this record
Sibling
Elisha Mccoy
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Henrietta Mccoy
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Matilda Mccoy
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Irvin Mccoy
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Susanna Mccoy
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ellis Mccoy
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Emil Mccoy
Sibling · 1940 · age
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 — Allegheny-County, Pennsylvania
Open full size
1940 US Federal Census — Allegheny-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03654-00693)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Ernestine Howard | 12 | Daughter | — | Pennsylvania |
| 42 | William Johnson | 25 | Head | Auto Mechanic | Alabama |
| 43 | Annie Mae Johnson | 27 | Wife | — | Alabama |
| 44 | Wilbur Jr. Johnson | 3 | Son | — | Pennsylvania |
| 45 | Amenia Johnson | 2 | Daughter | — | Pennsylvania |
| 46 | John H. Parker | 52 | Step-Father | Handyman | Alabama |
| 47 | Sara Parker | 73 | Mother | Seamstress | Alabama |
| 48 | Samuel Parker | 6 | Handy | — | Alabama |
| 49 | Vera Hamilton | 63 | Mother | — | Alabama |
| 50 | Wilson Mayhack | 2 | Grand Mother's Ward | — | Alabama |
| 51 | Joseph Leesone | 76 | Head | Laborer | South Carolina |
| 52 | Annie Leesone | 40 | Wife | — | South Carolina |
| 53 | Joseph Jr. Leesone | 15 | Son | — | Pennsylvania |
| 54 | Mattie L. Leesone | 14 | Daughter | — | Pennsylvania |
| 55 | William Leesone | 12 | Son | — | Pennsylvania |
| 56 | James Leesone | 10 | Son | — | Pennsylvania |
| 57 | Rosetta Leesone | 8 | Daughter | — | Pennsylvania |
| 58 | Leroy Leesone | 4 | Son | — | Pennsylvania |
| 59 | Arthur C. Griggs | 78 | Head | Butcher | Georgia |
| 60 | Georgia E. Griggs | 73 | Wife | — | Georgia |
| 61 | Amelia Griggs | 17 | Daughter | New Worker | Georgia |
| 62 | Hattie R. Griggs | 14 | Daughter | — | Pennsylvania |
| 63 | Martha Griggs | 13 | Daughter | — | Pennsylvania |
| 64 | Arthur Jr. Griggs | 27 | Son | Laborer | Georgia |
| 65 | Juanita Maroney | 27 | Daughter | — | Georgia |
| 66 | Clewell Maroney | 4 | Grand Son | — | Pennsylvania |
| 67 | Jean Maroney | 5 | Grand Daughter | — | Pennsylvania |
| 68 | Irvin Mccoy | 70 | Head | Truck Driver | South Carolina |
| 69 | Susanna Mccoy | 38 | Wife | — | South Carolina |
| 70 | Henrietta Mccoy | 18 | Daughter | — | Pennsylvania |
| 71 | Mary A. Mccoy THIS PERSON | 14 | Daughter | — | Pennsylvania |
| 72 | Irvin Mccoy | 14 | Son | — | Pennsylvania |
| 73 | Matilda Mccoy | 12 | Daughter | — | Pennsylvania |
| 74 | Ellis Mccoy | 11 | Son | — | Pennsylvania |
| 75 | Elisha Mccoy | 8 | Son | — | Pennsylvania |
| 76 | Susanna Mccoy | 3 | Daughter | — | Pennsylvania |
| 77 | Emil Mccoy | 0 | Son | — | Pennsylvania |
| 78 | Adeline Leesone | 70 | Sister-in-law | Houseworker | South Carolina |
| 79 | James Francis | 45 | Head | Laborer | South Carolina |
| 80 | Etoile Francis | 39 | Wife | — | South Carolina |
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)