MC
Mary Crowley — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Niagara-County, New York
Our Model Tree links this Mary Crowley across the 1930 and 1940 US Censuses in Niagara-County, New York (XGBoost, ~Confirmed) — first a daughter (b.~1928), then head of a 10-person household.
Age 12
b. ~1928
Female
Daughter
Born: New York
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Niagara-County, New York |
| Surname | Crowley |
| Given Name | Mary Jean |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | Niagara Falls |
| 1935 Residence (County) | Niagara |
| Additional Details | |
| Highest Grade | 6 |
| 1935 Residence | Same place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
| Township / Ward | Niagara Falls |
| Est. Birth Year | ~1928 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Charles Cuthbert | Other | — | 40 | ~1900 |
| John Crowley | Head | — | 41 | ~1899 |
| Elizabeth Crowley | Daughter | — | 9 | ~1931 |
| James Mcdougall | Other | — | 20 | ~1920 |
| Elizabeth Crowley | Spouse | — | 43 | ~1897 |
| Elaine Crowley | Daughter | — | 3 | ~1937 |
| Barbara Crowley | Daughter | — | 5 | ~1935 |
| Murray Thompson | Other | — | 30 | ~1910 |
| John Crowley | Son | — | 10 | ~1930 |
| Mary Crowley | Daughter | — | 12 | ~1928 |
Census Appearances
1930
Niagara, New …
Daughter, age 2
Niagara, New York · implied b. ~1928 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Crowley |
| Given Name | Mary Jean |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | Nova Scotia |
| Mother's Birthplace | Canada English |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1940
Niagara-County, New …
Daughter, age 12
Niagara-County, New York · implied b. ~1928 — 10 household members
| Surname | Crowley |
| Given Name | Mary Jean |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | Niagara Falls |
| 1935 Residence (County) | Niagara |
| Highest Grade | 6 |
| 1935 Residence | Same place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
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 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Crowley
Daughter · 1940 · age 12 · b. ~1928 · New York
★ You are viewing this record
Sibling
Elaine Crowley
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Crowley
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Barbara Crowley
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elizabeth Crowley
Sibling · 1940 · age 9
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 — Niagara-County, New York
Open full size
1940 US Federal Census — Niagara-County, New York
Page Contents
38 people indexed on this census page (nara:1940:m-t0627-02698-00163)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Raymond Babbitt | 10 | Son | — | New York |
| 42 | Bruce Babbitt | 4 | Son | — | New York |
| 43 | Charles Rife | 48 | Head | Watchman | Penn |
| 44 | Anna Rife | 48 | Wife | — | Canada Eng |
| 45 | Frederick Rife | 10 | Son | — | New York |
| 46 | Mary Jane Rife | 7 | Daughter | — | New York |
| 47 | Frank Rife | 5 | Son | — | New York |
| 48 | John D. Crowley | 41 | Head | Millwright | Canada Eng |
| 49 | Elizabeth Crowley | 43 | Wife | — | Canada Eng |
| 50 | Mary Jean Crowley THIS PERSON | 12 | Daughter | — | New York |
| 51 | John R. Crowley | 10 | Son | — | New York |
| 52 | Elizabeth T. Crowley | 9 | Daughter | — | New York |
| 53 | Barbara J. Crowley | 5 | Daughter | — | New York |
| 54 | Elaine A. Crowley | 3 | Daughter | — | New York |
| 55 | James Mcdougall | 20 | Brother in law | — | New York |
| 56 | Charles Cuthbert | 40 | Lodger | Salesman | Canada Eng |
| 57 | Murray Thompson | 30 | Lodger | Electrician | West Virginia |
| 58 | Kenneth P. Smith | 47 | Head | Baker | Illinois |
| 59 | Harriet Smith | 42 | Wife | — | Canada Eng |
| 60 | Dolores Smith | 18 | Daughter | Inspector | New York |
| 61 | Donald Smith | 13 | Son | — | New York |
| 62 | John Smith | 6 | Son | — | New York |
| 63 | Nancy Smith | 1 | Daughter | — | New York |
| 65 | Joe Citriniti | 52 | Head | Laborer | Italy |
| 66 | Alice Citriniti | 60 | Wife | — | New York |
| 67 | Harold M. Smalley | 32 | Nephew | Organist | New York |
| 68 | Sam Dawson | 58 | Head | Carpenter | England |
| 69 | Mary E. Dawson | 55 | Wife | — | England |
| 70 | Bernice E. Dawson | 27 | Daughter | Floor Lady | New York |
| 71 | Frank R. Dawson | 20 | Son | — | New York |
| 72 | May E. Dawson | 15 | Daughter | — | New York |
| 73 | Bettie A. Dawson | 12 | Daughter | — | New York |
| 75 | Nores W. Rew | 35 | Head | Painter Roofer | Canada Eng |
| 76 | Bessie M. Rew | 30 | Wife | — | Ohio |
| 77 | Shirley M. Rew | 9 | Daughter | — | New York |
| 78 | Audrey M. Rew | 7 | Daughter | — | New York |
| 79 | Billie L. Rew | 5 | Son | — | New York |
| 80 | Peter Miziolek | 52 | Head | Laborer | Poland |
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)