MG
Mary Gallagher — 1940 US Census Record
Model Tree available1940 United States Federal Census · District-Of-Columbia-County, District of Columbia
Our Model Tree links this Mary Gallagher across the 1920, 1930 and 1940 US Censuses in District-Of-Columbia-County, District of Columbia (XGBoost, ~Confirmed), with identified parents Bernard & Alice — first a daughter (b.~1921), then head of a 5-person household.
Age 19
b. ~1921
Female
Daughter
Born: Dist of Columbia
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | District-Of-Columbia-County, District of Columbia |
| Surname | Gallagher |
| Given Name | Mary Ellen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Dist of Columbia |
| 1935 Residence (City) | Washington |
| 1935 Residence (County) | District Of Columbia |
| Additional Details | |
| Occupation | New worker |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birthplace (normalized) | dist of columbia |
| Occupation | New Worker |
| Township / Ward | Washington |
| Est. Birth Year | ~1921 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Gallagher | Daughter | — | 19 | ~1921 |
| Theresa Gallagher | Daughter | — | 15 | ~1925 |
| Edward Gallagher | Head | — | 50 | ~1890 |
| J Pernell | Other | — | 19 | ~1921 |
| Mary Gallagher | Spouse | — | 50 | ~1890 |
Census Appearances
1920
District Of …
Daughter, age 1
District Of Columbia, District of Columbia · implied b. ~1919 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Gallagher |
| Given Name | Mary J. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Dist. of Columbia |
| Father's Birthplace | Dist. of Columbia |
| Mother's Birthplace | Maryland |
| Birthplace (normalized) | dist of columbia |
1930
Washington, District …
Daughter, age 12
Washington, District of Columbia · implied b. ~1918 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Gallagher |
| Given Name | Mary A. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Dist. of Columbia |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Dist. of Columbia |
| Can Read/Write | Yes |
| Birthplace (normalized) | dist of columbia |
1940
District-Of-Columbia-County, District …
Daughter, age 19
District-Of-Columbia-County, District of Columbia · implied b. ~1921 — 5 household members
| Surname | Gallagher |
| Given Name | Mary Ellen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Dist of Columbia |
| 1935 Residence (City) | Washington |
| 1935 Residence (County) | District Of Columbia |
| Occupation | New worker |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birthplace (normalized) | dist of columbia |
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 Gallagher across 3 US Census years (1920, 1930 and 1940) in 3 locations, using XGBoost record linkage. Identified parents: father Bernard Gallagher (~0.92 confidence) and mother Alice Gallagher (~0.92 confidence) and father Edward Gallagher (~0.92 confidence) and mother Mary Gallagher (~0.92 confidence) and father Henry Gallagher (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Bernard Gallagher
b. ~1885
Source father
● Household
· direct · ~0.92
Mother
Alice Gallagher
b. ~1886
Source mother
● Household
· direct · ~0.92
Father
Edward Gallagher
b. ~1890
Source father
● Household
· direct · ~0.92
Mother
Mary Gallagher
b. ~1890
Source mother
● Household
· direct · ~0.92
Father
Henry Gallagher
b. ~1895
Source father
● Household
· direct · ~0.92
This person
Anchor record
Mary Gallagher
Daughter · 1940 · age 19 · b. ~1921 · District of Columbia
★ You are viewing this record
Sibling
Theresa Gallagher
Sibling · 1940 · age 15
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 — District-Of-Columbia-County, District of Columbia
Open full size
1940 US Federal Census — District-Of-Columbia-County, District of Columbia
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00562-00082)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Florence Mooney | 65 | Lodger | Seamstress | Dist of Columbia |
| 42 | Edward E. Gallagher | 50 | Head | Ticket Examiner | Pennsylvania |
| 43 | Mary A. Gallagher | 50 | Wife | — | Dist of Columbia |
| 44 | Mary Ellen Gallagher THIS PERSON | 19 | Daughter | New Worker | Dist of Columbia |
| 45 | Theresa Gallagher | 15 | Daughter | — | Dist of Columbia |
| 46 | J. Harvey Pernell | 19 | Nephew | — | Dist of Columbia |
| 47 | Mora Daly | 75 | Head | — | Irish Free State |
| 48 | Timothy Daly | 49 | Son | Steamfitter | Dist of Columbia |
| 49 | Jeremiah Daly | 47 | Son | Plumber | Dist of Columbia |
| 50 | Norice C. Daly | 45 | Daughter | Clerk | Dist of Columbia |
| 51 | Arthur Daly | 34 | Son | Plumber | Dist of Columbia |
| 52 | Josephine Perrell | 43 | Daughter | — | Dist of Columbia |
| 53 | Leo Moriarty | 35 | Lodger | — | Dist of Columbia |
| 54 | John Kemp | 70 | Head | — | Dist of Columbia |
| 55 | Annie E. Kemp | 67 | Wife | — | Dist of Columbia |
| 56 | Paul F. Kemp | 36 | Son | Clerk | Dist of Columbia |
| 57 | Raymond J. Kemp | 29 | Son | Clerk | Dist of Columbia |
| 58 | Oda B. Johnson | 67 | Head | Laundress | Virginia |
| 59 | Igetta Perkins | 44 | Daughter | Houseworker | Virginia |
| 60 | Eliza Williams | 62 | Head | Laundress | Virginia |
| 61 | Mary White | 40 | Daughter | Houseworker | Virginia |
| 62 | Ethel S. Russell | 61 | Head | — | France |
| 63 | Catherine Sullivan | 45 | Head | Clerk | Dist of Columbia |
| 64 | Ellen R. Sullivan | 78 | Aunt | — | Dist of Columbia |
| 65 | John A. Harrington | 44 | Cousin | Shipping Clerk | Dist of Columbia |
| 66 | Here Ends Block 23 - Begins Block 24 | None | — | — | — |
| 67 | Arthur Graham | 42 | Head | Hauling | South Carolina |
| 68 | Louise Graham | 39 | Wife | — | North Carolina |
| 69 | Elmer Bailey | 32 | Brother in law | Caretaker | North Carolina |
| 70 | John Richardson | 70 | Head | — | Virginia |
| 71 | Laura Richardson | 67 | Wife | — | Virginia |
| 72 | Rose Toles | 28 | Daughter | Houseworker | Virginia |
| 73 | Marie Toles | 10 | Granddaughter | — | Dist of Columbia |
| 74 | Hattie Reddick | 65 | Daughter | — | Virginia |
| 75 | Mary Parker | 29 | Head | Houseworker | Virginia |
| 76 | William Toney | 61 | Head | Laborer | Maryland |
| 77 | Jessie Toney | 50 | Wife | — | Maryland |
| 78 | Hampshire Toney | 11 | Son | — | Dist of Columbia |
| 79 | Clinton Hinkle | 24 | Step-son | Caddy | Maryland |
| 80 | Charles Carroll | 44 | Head | Laborer | Virginia |
Pedigree Summary
Mary + 1 sibling
Gen 1 · 5 parents
~0.92
Max depth 4 (1900–1950 window)
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)