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Mary Mcmullen — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Essex-County, Massachusetts
Our Model Tree links this Mary Mcmullen across the 1930 and 1940 US Censuses in Essex-County, Massachusetts (XGBoost, ~Confirmed) — first a daughter (b.~1920), then head of a 6-person household.
Age 20
b. ~1920
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Essex-County, Massachusetts |
| Surname | McMullen |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Lawrence City |
| 1935 Residence (County) | Essex |
| Additional Details | |
| Hours Worked | 76 |
| Highest Grade | H-4 |
| 1935 Residence | Same Place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Lawrence City |
| Est. Birth Year | ~1920 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Donald Mcmullen | Son | — | 26 | ~1914 |
| Agnes Mcmullen | Spouse | — | 55 | ~1885 |
| Mary Mcmullen | Daughter | — | 20 | ~1920 |
| Andrew Mcmullen | Son | — | 17 | ~1923 |
| Arthur Mcmullen | Head | — | 66 | ~1874 |
| Agnes Mcmullen | Daughter | — | 14 | ~1926 |
Census Appearances
1930
Essex, Massachusetts
Daughter, age 10
Essex, Massachusetts · implied b. ~1920 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McMullen |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Ireland North |
| Mother's Birthplace | Ireland Free State |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Essex-County, Massachusetts
Daughter, age 20
Essex-County, Massachusetts · implied b. ~1920 — 6 household members
| Surname | McMullen |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Lawrence City |
| 1935 Residence (County) | Essex |
| Hours Worked | 76 |
| 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 Mcmullen across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Mcmullen
Daughter · 1940 · age 20 · b. ~1920 · Massachusetts
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Sibling
Andrew Mcmullen
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Agnes Mcmullen
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Donald Mcmullen
Sibling · 1940 · age 26
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-t0627-01584-00152)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Catherine Kelleher | 63 | Wife | — | Irish Free State |
| 2 | John Sheldon | 24 | Son | Packer | Massachusetts |
| 3 | John H Bartlett | 63 | Head | Electrician | Massachusetts |
| 4 | Leda M Bartlett | 66 | Wife | — | Massachusetts |
| 5 | Hazel M Bartlett | 40 | Daughter | Repair Clerk | Massachusetts |
| 6 | Bernice L Bartlett | 30 | Daughter | — | Massachusetts |
| 7 | Joseph P Pahis | 45 | Head | Sales Manager | Massachusetts |
| 8 | Frieda Pahis | 44 | Wife | — | New Hampshire |
| 9 | Beverly Pahis | 18 | Daughter | New Worker | Massachusetts |
| 10 | Gloria Pahis | 17 | Daughter | — | New Hampshire |
| 11 | Joseph Pahis | 16 | Son | — | Massachusetts |
| 12 | Fred Pahis | 14 | Son | — | Massachusetts |
| 13 | Harry Clarkson | 49 | Head | Trucker | Massachusetts |
| 14 | Ruth Clarkson | 47 | Wife | Drawing | Massachusetts |
| 15 | Anthony Hannagan | 73 | Head | — | England |
| 16 | Mary Hannagan | 74 | Wife | — | England |
| 17 | David Barrett | 59 | Head | Pipe Fitter | Massachusetts |
| 18 | Martha Barrett | 56 | Wife | — | Massachusetts |
| 19 | William Jenkins | 31 | Son in law | Attendant | Scotland |
| 20 | Marie Jenkins | 31 | Daughter | Speeder | Massachusetts |
| 21 | Mary Hamilton | 74 | Head | — | Irish Free State |
| 22 | James Hamilton | 39 | Son | Laborer | Massachusetts |
| 23 | James Hamilton | 37 | Son | Operative | Massachusetts |
| 24 | Lillian Hamilton | 34 | Daughter | Bookkeeper | Massachusetts |
| 25 | Christopher Sheehy | 35 | Head | Bracer | Maine |
| 26 | Mary Sheehy | 34 | Wife | Reeler | Irish Free State |
| 27 | Joseph Sheehy | 8 | Son | — | Massachusetts |
| 28 | James Sheehy | 6 | Son | — | Massachusetts |
| 29 | John Ashe | 70 | Lodger | Comber | Irish Free State |
| 30 | William A Donaldson | 57 | Head | Oiler | New Hampshire |
| 31 | Catherine Donaldson | 53 | Wife | Ticket Agent | Massachusetts |
| 32 | Arthur Mcmullen | 66 | Head | — | Irish Free State |
| 33 | Agnes Mcmullen | 55 | Wife | — | Irish Free State |
| 34 | Donald Mcmullen | 26 | Son | Clerk | Massachusetts |
| 35 | Mary Mcmullen THIS PERSON | 20 | Daughter | — | Massachusetts |
| 36 | Andrew Mcmullen | 17 | Son | — | Massachusetts |
| 37 | Agnes Mcmullen | 14 | Daughter | — | Massachusetts |
| 38 | Ernest Caron | 46 | Head | Watchman | Canada |
| 39 | Yvonne Caron | 45 | Wife | Burler | Massachusetts |
| 40 | Annette Caron | 18 | Daughter | Baller Girl | 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)