MH
Mary Hagan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Essex-County, Massachusetts
Our Model Tree links this Mary Hagan across the 1930 and 1940 US Censuses in Essex-County, Massachusetts (XGBoost, ~Confirmed) — first a daughter (b.~1911), then head of a 7-person household.
Age 29
b. ~1911
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Essex-County, Massachusetts |
| Surname | Hagan |
| Given Name | Mary J. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Salem City |
| 1935 Residence (County) | Essex |
| Additional Details | |
| Occupation | Stenographer |
| Industry | Public Utility |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1072 |
| Highest Grade | H-4 |
| 1935 Residence | Same Place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Stenographer |
| Township / Ward | Salem City |
| Est. Birth Year | ~1911 |
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 |
|---|---|---|---|---|
| William Hagan | Head | — | 61 | ~1879 |
| Mildred Hagan | Daughter | — | 20 | ~1920 |
| Joseph Hagan | Son | — | 23 | ~1917 |
| Alice Hagan | Daughter | — | 17 | ~1923 |
| Mary Hagan | Daughter | — | 29 | ~1911 |
| Stanley Hagan | Son | — | 32 | ~1908 |
| Mary Hagan | Spouse | — | 57 | ~1883 |
Census Appearances
1930
Essex, Massachusetts
Daughter, age 17
Essex, Massachusetts · implied b. ~1913 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hogan |
| Given Name | Mary J. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Essex-County, Massachusetts
Daughter, age 29
Essex-County, Massachusetts · implied b. ~1911 — 7 household members
| Surname | Hagan |
| Given Name | Mary J. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Salem City |
| 1935 Residence (County) | Essex |
| Occupation | Stenographer |
| Industry | Public Utility |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1072 |
| Highest Grade | H-4 |
| 1935 Residence | Same Place |
| 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 Hagan across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Hagan
Daughter · 1940 · age 29 · b. ~1911 · Massachusetts
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Sibling
Mildred Hagan
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alice Hagan
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Hagan
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Stanley Hagan
Sibling · 1940 · age 32
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-t0627-01589-00978)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Edward Arthur | 35 | Son | General | Massachusetts |
| 42 | Mary F. Ayers | 44 | Head | — | Massachusetts |
| 43 | John J. Leonard | 50 | Brother | Hall Finisher | Massachusetts |
| 44 | Jean White | 14 | Niece | — | Massachusetts |
| 45 | Ernest C. Bean | 56 | Head | Bookkeeper | Massachusetts |
| 46 | Ethel G. Bean | 55 | Wife | — | Massachusetts |
| 47 | Stephen H. Francis | 52 | Head | Own Business | Massachusetts |
| 48 | Alice H. Francis | 56 | Wife | — | Massachusetts |
| 49 | Stephen H. Francis | 22 | Son | — | Massachusetts |
| 50 | Alice C. Francis | 10 | Daughter | — | Massachusetts |
| 51 | Loran W. Copt | 32 | Head | Own Business | Massachusetts |
| 52 | Doris D. Copt | 33 | Wife | — | Massachusetts |
| 53 | Loran Jr. Copt | 4 | Son | — | Massachusetts |
| 54 | Thomas A. Curtis | 57 | Head | Tinsmith | Massachusetts |
| 55 | Margaret Curtis | 52 | Wife | — | Massachusetts |
| 56 | Thomas Curtis | 19 | Son | Assembler | Massachusetts |
| 57 | Thomas Curtis | 17 | Son | — | Massachusetts |
| 58 | Mary P. O'Rourke | 35 | Head | Teacher | Massachusetts |
| 59 | Ellen O'Rourke | 68 | Mother | — | Eire |
| 60 | Sophia O'Rourke | 31 | Sister | Private Secretary | Massachusetts |
| 61 | Walter G. Gray | 49 | Head | Locomotive Fireman | Maine |
| 62 | Dora R. Gray | 41 | Wife | — | New York |
| 63 | Arthur B. Mayo | 42 | Head | Route Salesman | Massachusetts |
| 64 | Gladys G. Mayo | 39 | Wife | — | Massachusetts |
| 65 | Robert B. Mayo | 5 | Son | — | Massachusetts |
| 66 | Arthur Keder | 57 | Head | Tool Room | Massachusetts |
| 67 | Mildred B. Keder | 57 | Wife | General | Massachusetts |
| 68 | Agnes H. Rice | 52 | Sister | Secretary | Massachusetts |
| 69 | Arthur F. Jr. Wheeler | 21 | Son | Clerk | Massachusetts |
| 70 | William Hagan | 61 | Head | — | Ireland |
| 71 | Mary B. Hagan | 57 | Wife | — | Ireland |
| 72 | Stanley J. Hagan | 32 | Son | Picker | Massachusetts |
| 73 | Mary J. Hagan THIS PERSON | 29 | Daughter | Stenographer | Massachusetts |
| 74 | Joseph F. Hagan | 23 | Son | Sweeper | Massachusetts |
| 75 | Mildred T. Hagan | 20 | Daughter | Tube Oper. | Massachusetts |
| 76 | Alice M. Hagan | 17 | Daughter | — | Massachusetts |
| 77 | John D. Southam | 53 | Head | Superintendent | Massachusetts |
| 78 | Elizabeth Southam | 53 | Wife | — | New Hampshire |
| 79 | R. Lloyd Southam | 26 | Son | Office Clerk | Massachusetts |
| 80 | Milton F. Keimke | 62 | Head | Elec. Splice | Maine |
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)