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William Gallagher — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Essex-County, Massachusetts
Our Model Tree links this William Gallagher across the 1930 and 1940 US Censuses in Essex-County, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1925), then head of a 10-person household.
Age 15
b. ~1925
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Essex-County, Massachusetts |
| Surname | Gallagher |
| Given Name | William Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Lawrence City |
| 1935 Residence (County) | Essex |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | Hs 2 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Lawrence City |
| Est. Birth Year | ~1925 |
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 William | Age | Birth yr |
|---|---|---|---|---|
| Elizabeth Gallagher | Daughter | — | 4 | ~1936 |
| Catherine Gallagher | Daughter | — | 19 | ~1921 |
| Dorothy Gallagher | Daughter | — | 13 | ~1927 |
| Mildred Gallagher | Daughter | — | 18 | ~1922 |
| William Gallagher | Head | — | 41 | ~1899 |
| John Gallagher | Son | — | 11 | ~1929 |
| Arthur Gallagher | Son | — | 1 | ~1939 |
| William Gallagher | Son | — | 15 | ~1925 |
| Thomas Gallagher | Son | — | 12 | ~1928 |
| Catherine Gallagher | Spouse | — | 38 | ~1902 |
Census Appearances
1930
Essex, Massachusetts
Son, age 5
Essex, Massachusetts · implied b. ~1925 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Gallagher |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Ireland Free |
| Mother's Birthplace | Ireland Free |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Essex-County, Massachusetts
Son, age 15
Essex-County, Massachusetts · implied b. ~1925 — 10 household members
| Surname | Gallagher |
| Given Name | William Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Lawrence City |
| 1935 Residence (County) | Essex |
| Income (1939) | 0 |
| Highest Grade | Hs 2 |
| 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 William Gallagher across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Gallagher
Son · 1940 · age 15 · b. ~1925 · Massachusetts
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Sibling
Arthur Gallagher
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elizabeth Gallagher
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Gallagher
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Gallagher
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Gallagher
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Gallagher
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mildred Gallagher
Sibling · 1940 · age 18
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-t0627-01583-00421)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Justina Johnson | 74 | Mother in law | — | Sweden |
| 42 | John P Hamenko | 45 | Head | Baker | Lithuania |
| 43 | Pauline Hamenko | 55 | Wife | Drawer | Lithuania |
| 44 | Pauline Hamenko | 22 | Daughter | House Keeper | Massachusetts |
| 45 | Edward Hamenko | 18 | Son | — | Massachusetts |
| 46 | Charles Hamenko | 15 | Son | — | Massachusetts |
| 47 | William Gallagher | 41 | Head | Checker | Massachusetts |
| 48 | Catherine Gallagher | 38 | Wife | — | Massachusetts |
| 49 | Catherine Gallagher | 19 | Daughter | — | Massachusetts |
| 50 | Mildred Gallagher | 18 | Daughter | — | Massachusetts |
| 51 | William Jr Gallagher THIS PERSON | 15 | Son | — | Massachusetts |
| 52 | Dorothy Gallagher | 13 | Daughter | — | Massachusetts |
| 53 | Thomas Gallagher | 12 | Son | — | Massachusetts |
| 54 | John Gallagher | 11 | Son | — | Massachusetts |
| 55 | Elizabeth Gallagher | 4 | Daughter | — | Massachusetts |
| 56 | Arthur Gallagher | 1 | Son | — | Massachusetts |
| 57 | John Murphy | 45 | Head | Fireman | Massachusetts |
| 58 | Nellie Murphy | 42 | Wife | — | Massachusetts |
| 59 | John Jr Murphy | 19 | Son | Coal Helper | Massachusetts |
| 60 | Joseph Murphy | 14 | Son | — | Massachusetts |
| 61 | Mary Murphy | 13 | Daughter | — | Massachusetts |
| 62 | Catherine Murphy | 6 | Daughter | — | Massachusetts |
| 63 | Nelson Drouin | 39 | Head | Baker | Massachusetts |
| 64 | Cora Drouin | 26 | Wife | — | Massachusetts |
| 65 | Leon Drouin | 5 | Son | — | Massachusetts |
| 66 | Theresa Drouin | 3 | Daughter | — | Massachusetts |
| 67 | Doris Drouin | 2 | Daughter | — | Massachusetts |
| 68 | Roland Baillargeon | 20 | Lodger | Baker | Massachusetts |
| 69 | Rita Mahoney | 40 | Head | Sewer | Massachusetts |
| 70 | Joseph Mahoney | 70 | Father | — | Massachusetts |
| 71 | Catherine Coleman | 65 | Head | — | Massachusetts |
| 72 | Thomas Coleman | 40 | Son | Helper | Massachusetts |
| 73 | Veronica Maelie | 32 | Lodger | Homecleaning | Massachusetts |
| 74 | Thomas Maelie | 2 | Lodger | — | Massachusetts |
| 75 | Joseph Mcmahon | 50 | Head | Cloth Packer | England |
| 76 | Lillian Mcmahon | 47 | Wife | Bed-Mender | Ohio |
| 77 | Lillian Mcmahon | 12 | Daughter | — | Massachusetts |
| 78 | Elizabeth Carroll | 41 | Head | — | Massachusetts |
| 79 | James J Carroll | 31 | Brother | — | Massachusetts |
| 80 | Daniel A Carroll | 30 | Brother | — | Massachusetts |
Related Census Records
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)