MC
Mary Costa — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Bristol-County, Massachusetts
Our Model Tree links this Mary Costa across the 1920, 1930 and 1940 US Censuses in Bristol-County, Massachusetts (XGBoost, ~Confirmed) — first a spouse (b.~1898), then head of a 4-person household.
Age 42
b. ~1898
Female
Spouse
Born: Azores
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Bristol-County, Massachusetts |
| Surname | Costa |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Azores |
| 1935 Residence (City) | New Bedford City |
| 1935 Residence (County) | Bristol |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Weaver |
| Industry | Cotton Mill |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 472 |
| Highest Grade | No 4 |
| 1935 Residence | Same house |
| Birth Country | Portugal |
| Birthplace (normalized) | azores |
| Occupation | Weaver |
| Township / Ward | New Bedford City |
| 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 |
|---|---|---|---|---|
| Mary Costa | Spouse | — | 42 | ~1898 |
| Thelores Costa | Daughter | — | 10 | ~1930 |
| Manuel Costa | Head | — | 41 | ~1899 |
| Agnes Costa | Daughter | — | 11 | ~1929 |
Census Appearances
1920
Bristol, Massachusetts
Other, age 22
Bristol, Massachusetts · implied b. ~1898 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Costa |
| Given Name | Mary |
| Relationship to Head | Daughter-in-law |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Married |
| Birthplace | Azores |
| Year of Immigration | 1916 |
| Naturalization Status | Alien |
| Father's Birthplace | Azores |
| Mother's Birthplace | Azores |
| Occupation | Weaver |
| Industry | Cotton Mill |
| Class of Worker | W |
| Can Read | No |
| Can Write | No |
| Speaks English | No |
| Mother Tongue | Portuguese |
| Birth Country | Portugal |
| Birthplace (normalized) | azores |
1930
Bristol, Massachusetts
Other, age 34
Bristol, Massachusetts · implied b. ~1896 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Costa |
| Given Name | Mary |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 34 |
| Marital Status | Married |
| Birthplace | Azores |
| Naturalization Status | Alien |
| Year of Immigration | 1918 |
| Age at First Marriage | 19 |
| Father's Birthplace | Azores |
| Mother's Birthplace | Azores |
| Occupation | Weaver |
| Industry | Cotton Mill |
| Class of Worker | W |
| Can Read/Write | No |
| Mother Tongue | Portuguese |
| Birth Country | Portugal |
| Birthplace (normalized) | azores |
1940
Bristol-County, Massachusetts
Spouse, age 42
Bristol-County, Massachusetts · implied b. ~1898 — 4 household members
| Surname | Costa |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Azores |
| 1935 Residence (City) | New Bedford City |
| 1935 Residence (County) | Bristol |
| Naturalization Status | Naturalized |
| Occupation | Weaver |
| Industry | Cotton Mill |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 472 |
| Highest Grade | No 4 |
| 1935 Residence | Same house |
| Birth Country | Portugal |
| Birthplace (normalized) | azores |
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 Costa across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Costa
Spouse · 1940 · age 42 · b. ~1898 · Massachusetts
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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 — Bristol-County, Massachusetts
Open full size
1940 US Federal Census — Bristol-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01701-00322)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Louis Carvalho | 20 | Son | — | Mass |
| 2 | Margaret Carvalho | 19 | Daughter | — | Mass |
| 3 | Frank Almeida | 42 | Head | Weaver | Azores |
| 4 | Mary Almeida | 36 | Wife | Weaver | Azores |
| 5 | Leonard Almeida | 12 | Son | — | Mass |
| 6 | Zelmira Almeida | 11 | Daughter | — | Mass |
| 7 | Cesar Almeida | 54 | Head | Weaver | Azores |
| 8 | Mary Almeida | 51 | Wife | — | Azores |
| 9 | Hermina Almeida | 19 | Daughter | — | Mass |
| 10 | Edward Almeida | 18 | Son | New Worker | Mass |
| 11 | Priscilla Almeida | 15 | Daughter | New Worker | Mass |
| 12 | Joaquim Almeida | 14 | Son | — | Mass |
| 13 | Americo Almeida | 11 | Son | — | Mass |
| 14 | John Silva | 64 | Head | — | Cape Verde |
| 15 | Carlota Silva | 54 | Wife | Speeder | Azores |
| 16 | Fernando Lameiras | 43 | Head | Carpenter | Portugal |
| 17 | Rosa Lameiras | 39 | Wife | — | Azores |
| 18 | Louis Rocha | 21 | Stepson | Baker | Mass |
| 19 | Guerino Reis | 35 | Head | — | Cape Verde |
| 20 | Mary Reis | 26 | Wife | — | Azores |
| 21 | Laura Goncalves | 39 | Niece | Cone Maker | Mass |
| 22 | Gineamacro Cunha | 41 | Head | Winding | Portugal |
| 23 | Victoria Lopes | 73 | Mother | — | Portugal |
| 24 | Mary Medeiros | 59 | Head | — | Azores |
| 25 | Manuel Medeiros | 23 | Son | Helper | Mass |
| 26 | John Rebola | 46 | Head | Card Tender | Portugal |
| 27 | Mary Rebola | 30 | Wife | Housekeeper | Mass |
| 28 | Elsie Rebola | 11 | Daughter | — | Mass |
| 29 | Richard Rebola | 11 | Son | — | Mass |
| 30 | David Souza | 40 | Head | Card Room | Portugal |
| 31 | Mary Souza | 40 | Wife | — | Portugal |
| 32 | Daniel Souza | 11 | Son | — | Mass |
| 33 | Manuel Mendonca | 44 | Head | Cone Setter | Portugal |
| 34 | Palmeira Mendonca | 40 | Wife | Speeder Tender | Portugal |
| 35 | Manuel Mendonca | 15 | Son | — | Mass |
| 36 | Amandio Mendonca | 13 | Son | — | Mass |
| 37 | Manuel Costa | 41 | Head | Weaver | Portugal |
| 38 | Mary Costa THIS PERSON | 42 | Wife | Weaver | Azores |
| 39 | Agnes Costa | 11 | Daughter | — | Mass |
| 40 | Thelores Costa | 10 | Daughter | — | Rhode Island |
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)