MG
Mary Garcia — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Alameda-County, California
Our Model Tree links this Mary Garcia across the 1920, 1930 and 1940 US Censuses in Alameda-County, California (XGBoost, ~Confirmed) — first a spouse (b.~1898), then head of a 4-person household.
Age 42
b. ~1898
Female
Spouse
Born: Portugal
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Alameda-County, California |
| Surname | Garcia |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Portugal |
| 1935 Residence (City) | Hayward |
| 1935 Residence (County) | Alameda |
| Naturalization Status | Alien |
| Additional Details | |
| Highest Grade | No 4 |
| 1935 Residence | Same place |
| Birth Country | Portugal |
| Birthplace (normalized) | portugal |
| Township / Ward | Hayward |
| Est. Birth Year | ~1898 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Henry Garcia | Head | — | 44 | ~1896 |
| Ernest Garcia | Son | — | 17 | ~1923 |
| Mary Garcia | Spouse | — | 42 | ~1898 |
| Manuel Garcia | Son | — | 21 | ~1919 |
Census Appearances
1920
Alameda, California
Spouse, age 20
Alameda, California · implied b. ~1900 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Garcia |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Married |
| Birthplace | Portugal |
| Year of Immigration | 1907 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Portugal |
| Mother's Birthplace | Portugal |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Portuguese |
| Birth Country | Portugal |
| Year of Naturalization | 1917 |
| Birthplace (normalized) | portugal |
1930
Alameda, California
Spouse, age 31
Alameda, California · implied b. ~1899 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Garcia |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Portugal |
| Naturalization Status | Naturalized |
| Age at First Marriage | 18 |
| Father's Birthplace | Portugal |
| Mother's Birthplace | Portugal |
| Can Read/Write | Yes |
| Mother Tongue | Portuguese |
| Birth Country | Portugal |
| Birthplace (normalized) | portugal |
1940
Alameda-County, California
Spouse, age 42
Alameda-County, California · implied b. ~1898 — 4 household members
| Surname | Garcia |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Portugal |
| 1935 Residence (City) | Hayward |
| 1935 Residence (County) | Alameda |
| Naturalization Status | Alien |
| Highest Grade | No 4 |
| 1935 Residence | Same place |
| Birth Country | Portugal |
| Birthplace (normalized) | portugal |
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 Garcia across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Garcia
Spouse · 1940 · age 42 · b. ~1898 · California
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Alameda-County, California
Open full size
1940 US Federal Census — Alameda-County, California
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00184-00178)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Frank Medeiros | 56 | Head | Laborer | Portugal |
| 2 | Mary Medeiros | 53 | Wife | — | Portugal |
| 3 | Andrew Medeiros | 20 | Son | Doorman | California |
| 4 | Frank Medeiros | 20 | Son | Laborer | California |
| 5 | Mary Smith | 63 | Head | Nurse | California |
| 6 | Edward Mendonca | 36 | Head | Electrician | California |
| 7 | Jenny Mendonca | 29 | Wife | Canner | California |
| 8 | Henry Garcia | 44 | Head | Laborer | Portugal |
| 9 | Mary Garcia THIS PERSON | 42 | Wife | — | Portugal |
| 10 | Manuel Garcia | 21 | Son | Laborer | California |
| 11 | Ernest Garcia | 17 | Son | — | California |
| 12 | John Dowling | 65 | Head | — | California |
| 13 | Joseph Ray | 51 | Head | Builder | Portugal |
| 14 | Rose Ray | 51 | Wife | — | Portugal |
| 15 | Anna Ray | 21 | Daughter | — | Massachusetts |
| 16 | Frank Ray | 14 | Son | — | Massachusetts |
| 17 | Joseph Ray | 26 | Head | Carpenter | Massachusetts |
| 18 | Eva Ray | 25 | Wife | — | California |
| 19 | Marjorie Ray | 4 | Daughter | — | California |
| 20 | Marlene Ray | 2 | Daughter | — | California |
| 21 | Homer Conn | 20 | Head | Laborer | Alabama |
| 22 | Delene Conn | 19 | Wife | — | Oklahoma |
| 23 | Joseph Breit | 42 | Head | Barber | Portugal |
| 24 | Emily Breit | 35 | Wife | Telephone Operator | California |
| 25 | Emma Breit | 68 | Mother | — | Portugal |
| 26 | John Terra | 52 | Head | Laborer | Portugal |
| 27 | Mary Terra | 49 | Wife | — | Portugal |
| 28 | Fred Terra | 28 | Son | Accountant | Portugal |
| 29 | Anne Cabral | 32 | Head | — | California |
| 30 | Gilbert Cabral | 7 | Son | — | California |
| 31 | Ronald Cabral | 5 | Son | — | California |
| 32 | Stanley Cabral | 4 | Son | — | California |
| 33 | Robert Cabral | 3 | Son | — | California |
| 34 | Joseph Gomez | 28 | Relative | — | Portugal |
| 35 | Frank Gomez | 66 | Relative | — | Portugal |
| 36 | Frank Tapia | 30 | Head | Auto Trimmer | California |
| 37 | Clelia Tapia | 28 | Wife | — | California |
| 38 | Nadine Tapia | 5 | Daughter | — | California |
| 39 | Kenneth Tapia | 1 | Son | — | California |
| 40 | Augusta Aguiar | 88 | Relative | — | Portugal |
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)