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Mary Barrett — 1940 US Census Record
Model Tree available1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Mary Barrett across the 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents Patrick & Mary — first a daughter (b.~1919), then head of a 4-person household.
Age 21
b. ~1919
Female
Daughter
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Barrett |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Occupation | Waitress |
| Industry | Institute |
| Class of Worker | PW |
| Hours Worked | 50 |
| Income (1939) | 88 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Waitress |
| Township / Ward | Pittsburgh |
| Est. Birth Year | ~1919 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Barrett | Daughter | — | 21 | ~1919 |
| Anna Barrett | Daughter | — | 16 | ~1924 |
| Mary Barrett | Head | — | 47 | ~1893 |
| Thomas Barrett | Son | — | 18 | ~1922 |
Census Appearances
1920
Allegheny, Pennsylvania
Daughter, age 1
Allegheny, Pennsylvania · implied b. ~1919 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Barrett |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Allegheny, Pennsylvania
Daughter, age 11
Allegheny, Pennsylvania · implied b. ~1919 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Barrett |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Daughter, age 21
Allegheny-County, Pennsylvania · implied b. ~1919 — 4 household members
| Surname | Barrett |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh |
| 1935 Residence (County) | Allegheny |
| Occupation | Waitress |
| Industry | Institute |
| Class of Worker | PW |
| Hours Worked | 50 |
| Income (1939) | 88 |
| Highest Grade | H-4 |
| 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 Barrett across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Patrick Barrett (~0.92 confidence) and mother Mary Barrett (~0.92 confidence) and mother Mary Barrett (~0.92 confidence) and mother Mary Barrett (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Patrick Barrett
b. ~1889
Source father
● Household
· direct · ~0.92
Mother
Mary Barrett
b. ~1889
Source mother
● Household
· direct · ~0.92
Mother
Mary Barrett
b. ~1891
Source mother
● Household
· direct · ~0.92
Mother
Mary Barrett
b. ~1893
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Barrett
Daughter · 1940 · age 21 · b. ~1919 · Pennsylvania
★ You are viewing this record
Sibling
Thomas Barrett
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Anna Barrett
Sibling · 1940 · age 16
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
25 people indexed on this census page (nara:1940:m-t0627-03661-00691)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Alice Lewis | 19 | Daughter | — | Pennsylvania |
| 42 | Linda J. Lewis | 12 | Daughter | — | Pennsylvania |
| 43 | William Hoffeld | 60 | Head | Bricklayer | New York |
| 44 | Elizabeth Hoffeld | 60 | Wife | — | Pennsylvania |
| 45 | William Hoffeld | 32 | Son | Painter | Pennsylvania |
| 46 | A. C. Samuels | 73 | Head | — | West Virginia |
| 47 | Catherine Herron | 37 | Daughter | Stenographer | West Virginia |
| 48 | Virginia Herron | 16 | Granddaughter | — | Pennsylvania |
| 49 | Josephine Corey | 30 | Head | Physical Ed. | Pennsylvania |
| 50 | James Mcfarland | 37 | Brother | Musician | Pennsylvania |
| 51 | Rose Mcfarland | 72 | Mother | — | Ireland |
| 52 | Catherine Mcfarland | 50 | Sister | — | Pennsylvania |
| 53 | Mary Barrett | 47 | Head | Cleaner | England |
| 54 | Mary Barrett THIS PERSON | 21 | Daughter | Waitress | Pennsylvania |
| 55 | Thomas Barrett | 18 | Son | Fireguard | Pennsylvania |
| 56 | Anna Barrett | 16 | Daughter | Fireguard | Pennsylvania |
| 57 | John Glitchier | 62 | Head | Barber | Pennsylvania |
| 58 | Nilma Glitchier | 56 | Wife | — | Germany |
| 59 | William Emerick | 31 | Head | Sub-Carrier | Pennsylvania |
| 60 | Virginia Emerick | 33 | Wife | — | Pennsylvania |
| 61 | Elizabeth Emerick | 1 | Daughter | — | Pennsylvania |
| 62 | Martin Mante | 66 | Head | Handyman | Pennsylvania |
| 63 | Caroline Mante | 69 | Wife | — | Pennsylvania |
| 64 | Henry Binder | 76 | Head | — | Pennsylvania |
| 65 | Margaret Binder | 45 | Wife | — | Indiana |
Pedigree Summary
Mary + 2 siblings
Gen 1 · 4 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)