MC
Mary Crowley — 1940 US Census Record
Model Tree available1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Mary Crowley across the 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents Michael & Leon — first a daughter (b.~1917), then head of a 2-person household.
Age 23
b. ~1917
Female
Daughter
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Crowley |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh city |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Class of Worker | 0 |
| Hours Worked | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Pittsburgh City |
| Est. Birth Year | ~1917 |
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.
2 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Michael Crowley | Head | — | 59 | ~1881 |
| Mary Crowley | Daughter | — | 23 | ~1917 |
Census Appearances
1920
Allegheny, Pennsylvania
Daughter, age 1
Allegheny, Pennsylvania · implied b. ~1919 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Crowley |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | England |
| Mother's Birthplace | Ohio |
| Can Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Allegheny, Pennsylvania
Daughter, age 12
Allegheny, Pennsylvania · implied b. ~1918 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Crowley |
| Given Name | Margaret N. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | England |
| Mother's Birthplace | Ohio |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Daughter, age 23
Allegheny-County, Pennsylvania · implied b. ~1917 — 2 household members
| Surname | Crowley |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh city |
| 1935 Residence (County) | Allegheny |
| Class of Worker | 0 |
| Hours Worked | 0 |
| Highest Grade | Hs 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 Crowley across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Michael Crowley (~0.92 confidence) and father Leon Crowley (~0.92 confidence) and mother Rose Crowley (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Michael Crowley
b. ~1881
Source father
● Household
· direct · ~0.92
Father
Leon Crowley
b. ~1887
Source father
● Household
· direct · ~0.92
Mother
Rose Crowley
b. ~1890
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Crowley
Daughter · 1940 · age 23 · b. ~1917 · 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 — 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-t0627-03675-00598)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Salvatore Grace Couch | 11 | Daughter | — | Pennsylvania |
| 2 | Audrey Couch | 9 | Daughter | — | Pennsylvania |
| 3 | Joan Couch | 7 | Daughter | — | Pennsylvania |
| 4 | Lois Couch | 6 | Daughter | — | Pennsylvania |
| 5 | Joseph Couch | 4 | Son | — | Pennsylvania |
| 6 | Gloria A. Couch | 1 | Daughter | — | Pennsylvania |
| 7 | Michael Crowley | 59 | Head | Lineman | Irish Free State |
| 8 | Mary Crowley THIS PERSON | 23 | Daughter | — | Pennsylvania |
| 9 | Edgar Scharf | 43 | Head | Laborer | Pennsylvania |
| 10 | Sarah Scharf | 42 | Wife | — | New York |
| 11 | Walter Kroll | 42 | Head | Proprietor | Poland |
| 12 | Sophia Kroll | 36 | Wife | Proprietor | Pennsylvania |
| 13 | George Kroll | 16 | Son | — | Pennsylvania |
| 14 | Dolores Kroll | 14 | Daughter | — | Pennsylvania |
| 15 | Margaret Sweeney | 75 | Head | — | England |
| 16 | Mary Sweeney | 44 | Daughter | — | Pennsylvania |
| 17 | Frances Sweeney | 42 | Daughter | Ironer | Pennsylvania |
| 18 | Michael Sweeney | 40 | Son | Bartender | Pennsylvania |
| 19 | Michael Madden | 65 | Nephew | Laborer | England |
| 20 | John Fitzpatrick | 51 | Head | Custodian | Pennsylvania |
| 21 | Catherine Fitzpatrick | 49 | Wife | — | Pennsylvania |
| 22 | Rita Fitzpatrick | 22 | Daughter | Ironer | Pennsylvania |
| 23 | Mary Fitzpatrick | 21 | Daughter | Builder | Pennsylvania |
| 24 | William Fitzpatrick | 19 | Son | Stock Clerk | Pennsylvania |
| 25 | Dolores Fitzpatrick | 17 | Daughter | — | Pennsylvania |
| 26 | John Fitzpatrick | 14 | Son | — | Pennsylvania |
| 27 | Charles A. Arnold | 73 | Head | — | Iowa |
| 28 | Mary M. Arnold | 65 | Wife | — | Pennsylvania |
| 29 | Lillian Washue | 61 | Sister-in-law | — | Pennsylvania |
| 30 | Millicent Washue | 56 | Sister-in-law | — | Illinois |
| 31 | Paul Holiday | 23 | Head | Shipper | Pennsylvania |
| 32 | George Holiday | 26 | Brother | Laborer | Pennsylvania |
| 33 | Mary Holiday | 18 | Sister | — | Pennsylvania |
| 34 | Esther Kine Holiday | 16 | Sister | — | Pennsylvania |
| 35 | John Johnston | 50 | Head | Plumber | Pennsylvania |
| 36 | Viola Johnston | 47 | Wife | — | Pennsylvania |
| 37 | John Johnston | 23 | Son | Assembler | Pennsylvania |
| 38 | Ralph Johnston | 20 | Son | Clerk | Pennsylvania |
| 39 | August Johnston | 17 | Son | — | Pennsylvania |
| 40 | Mary Jane Johnston | 15 | Daughter | — | Pennsylvania |
Pedigree Summary
Mary
Gen 1 · 3 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)