MC
Mary Crowley — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Essex-County, Massachusetts
Our Model Tree links this Mary Crowley across the 1930 and 1940 US Censuses in Essex-County, Massachusetts (XGBoost, ~Confirmed) — first a daughter (b.~1927), then head of a 7-person household.
Age 13
b. ~1927
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Essex-County, Massachusetts |
| Surname | Crowley |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Salem city |
| 1935 Residence (County) | Essex |
| Additional Details | |
| Highest Grade | 8 |
| 1935 Residence | Same house |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Salem City |
| Est. Birth Year | ~1927 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mabel Crowley | Spouse | — | 44 | ~1896 |
| Mary Crowley | Daughter | — | 13 | ~1927 |
| Eugene Crowley | Son | — | 12 | ~1928 |
| Ruth Crowley | Daughter | — | 7 | ~1933 |
| Eugene Crowley | Head | — | 48 | ~1892 |
| Robert Crowley | Son | — | 10 | ~1930 |
| John Crowley | Son | — | 1 | ~1939 |
Census Appearances
1930
Essex, Massachusetts
Daughter, age 3
Essex, Massachusetts · implied b. ~1927 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Crowley |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | New Hampshire |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Essex-County, Massachusetts
Daughter, age 13
Essex-County, Massachusetts · implied b. ~1927 — 7 household members
| Surname | Crowley |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Salem city |
| 1935 Residence (County) | Essex |
| Highest Grade | 8 |
| 1935 Residence | Same house |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
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 13 · b. ~1927 · Massachusetts
★ You are viewing this record
Sibling
Robert Crowley
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Crowley
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ruth Crowley
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eugene Crowley
Sibling · 1940 · age 12
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 — Essex-County, Massachusetts
Open full size
1940 US Federal Census — Essex-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01589-01158)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Joseph P. Foley | 27 | head | Clerk | Massachusetts |
| 2 | Mary Foley | 28 | wife | Operator | Irish Free State |
| 3 | Simpson Greaves | 40 | head | Laborer | Massachusetts |
| 4 | Alice Greaves | 36 | wife | — | Massachusetts |
| 5 | Richard Greaves | 14 | son | — | Massachusetts |
| 6 | Marjorie Greaves | 12 | daughter | — | Massachusetts |
| 7 | William Drabinowicz | 29 | head | Manager | Massachusetts |
| 8 | Elizabeth Drabinowicz | 24 | wife | — | Irish Free State |
| 9 | Alma M. Drabinowicz | 7 | daughter | — | Massachusetts |
| 10 | Florian Drabinowicz | 67 | father | — | Poland |
| 11 | Dorothy Hennessey | 42 | head | School Teacher | Massachusetts |
| 12 | Dorothy M. Hennessey | 13 | daughter | — | Massachusetts |
| 13 | Phyllis Hennessey | 11 | daughter | — | Massachusetts |
| 14 | Stephen Hennessey | 8 | son | — | Massachusetts |
| 15 | Margaret Cummings | 25 | servant | Maid | Massachusetts |
| 16 | Eugene Crowley | 48 | head | Letter Carrier | Massachusetts |
| 17 | Mabel Crowley | 44 | wife | — | New Hampshire |
| 18 | Mary Crowley THIS PERSON | 13 | daughter | — | Massachusetts |
| 19 | Eugene Jr. Crowley | 12 | son | — | Massachusetts |
| 20 | Robert Crowley | 10 | son | — | Massachusetts |
| 21 | Ruth Crowley | 7 | daughter | — | Massachusetts |
| 22 | John Crowley | 1 | son | — | Massachusetts |
| 23 | Edward J. Chasson | 33 | head | Commercial | New Hampshire |
| 24 | Esther A. Chasson | 33 | wife | Dial Instructor | Illinois |
| 25 | Charles Coker | 69 | head | Treasurer | Massachusetts |
| 26 | Elizabeth Coker | 65 | wife | — | New Hampshire |
| 27 | Arthur Abbott | 72 | head | Laborer | Massachusetts |
| 28 | Edith Abbott | 38 | daughter | Sales Girl | Massachusetts |
| 29 | Annie J. Horton | 73 | head | Surveyor | Massachusetts |
| 30 | Nathaniel Very | 74 | head | — | Massachusetts |
| 31 | Rita D. Very | 59 | wife | — | Massachusetts |
| 32 | James Barnes | 69 | head | Lawyer | Massachusetts |
| 33 | Lucy Barnes | 57 | wife | — | Massachusetts |
| 34 | Helen Schallenbach | 62 | sister-in-law | — | Massachusetts |
| 35 | Roland Chute | 35 | head | Manager | Massachusetts |
| 36 | Sarah E. Chute | 36 | wife | Clerk | Massachusetts |
| 37 | Roland Jr. Chute | 14 | son | — | Massachusetts |
| 38 | Shirley Chute | 13 | daughter | — | Massachusetts |
| 39 | Priscilla Chute | 11 | daughter | — | Massachusetts |
| 40 | Robert Chute | 3 | son | — | Massachusetts |
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)