MC
Mary Costa — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Providence-County, Rhode Island
Our Model Tree links this Mary Costa across the 1930 and 1940 US Censuses in Providence-County, Rhode Island (XGBoost, ~Confirmed) — first a daughter (b.~1928), then head of a 9-person household.
Age 12
b. ~1928
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Providence-County, Rhode Island |
| Surname | Costa |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Providence |
| 1935 Residence (County) | Providence |
| Additional Details | |
| Highest Grade | H 1 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Providence |
| Est. Birth Year | ~1928 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Costa | Daughter | — | 12 | ~1928 |
| Rosina Costa | Daughter | — | 6 | ~1934 |
| George Costa | Head | — | 42 | ~1898 |
| Irene Costa | Daughter | — | 15 | ~1925 |
| Florence Costa | Daughter | — | 14 | ~1926 |
| Leonora Costa | Daughter | — | 7 | ~1933 |
| Robert Costa | Son | — | 2 | ~1938 |
| George Costa | Son | — | 17 | ~1923 |
| Mary Costa | Spouse | — | 36 | ~1904 |
Census Appearances
1930
Bristol, Massachusetts
Daughter, age 1
Bristol, Massachusetts · implied b. ~1929 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Costa |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Azores |
| Mother's Birthplace | Azores |
| Occupation | none |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Providence-County, Rhode …
Daughter, age 12
Providence-County, Rhode Island · implied b. ~1928 — 9 household members
| Surname | Costa |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Providence |
| 1935 Residence (County) | Providence |
| Highest Grade | H 1 |
| 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 Costa across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Costa
Daughter · 1940 · age 12 · b. ~1928 · Rhode Island
★ You are viewing this record
Sibling
Leonora Costa
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rosina Costa
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
George Costa
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Florence Costa
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Irene Costa
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Costa
Sibling · 1940 · age 2
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 — Providence-County, Rhode Island
Open full size
1940 US Federal Census — Providence-County, Rhode Island
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03773-00074)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | George F. Costa | 42 | Head | Truck Driver | Massachusetts |
| 2 | Mary C. Costa | 36 | Wife | — | Azores |
| 3 | George Costa | 17 | Son | Laborer | Massachusetts |
| 4 | Irene F. Costa | 15 | Daughter | — | Massachusetts |
| 5 | Florence Costa | 14 | Daughter | — | Massachusetts |
| 6 | Mary Costa THIS PERSON | 12 | Daughter | — | Massachusetts |
| 7 | Leonora Costa | 7 | Daughter | — | Rhode Island |
| 8 | Rosina Costa | 6 | Daughter | — | Rhode Island |
| 9 | Robert Costa | 2 | Son | — | Rhode Island |
| 10 | Mary C. Roderick | 53 | Head | Sorter | Azores |
| 11 | William P. Green | 27 | Son in law | — | Rhode Island |
| 12 | Mary D. Green | 26 | Daughter | Packing | Rhode Island |
| 13 | Abel Silva | 30 | Head | Operator | Azores |
| 14 | Mary Silva | 27 | Wife | — | Azores |
| 15 | Amandio Tavares | 39 | Head | Draftsman | Massachusetts |
| 16 | Sofia Tavares | 35 | Wife | — | Azores |
| 17 | Ricardo Tavares | 8 | Son | — | Massachusetts |
| 18 | Theresa Tavares | 7 | Daughter | — | Massachusetts |
| 19 | George Tavares | 4 | Son | — | Massachusetts |
| 20 | Idalina Tavares | 1 | Daughter | — | Massachusetts |
| 21 | Louis Vincent | 38 | Head | Maker | Azores |
| 22 | Mary Vincent | 32 | Wife | — | Azores |
| 23 | Hilda M. Vincent | 13 | Daughter | — | Rhode Island |
| 24 | Louis Jr. Vincent | 10 | Son | — | Rhode Island |
| 25 | Louis Jr. Vincent | 1 | Son | — | Rhode Island |
| 26 | Error | None | — | — | — |
| 27 | Frank De Silva | 27 | Head | Stevedore | Rhode Island |
| 28 | Mary De Silva | 26 | Wife | — | Azores |
| 29 | Joyce De Silva | 2 | Daughter | — | Rhode Island |
| 30 | Joseph Virriea | 25 | Head | Truck Driver | Rhode Island |
| 31 | Mary M. Virriea | 24 | Wife | Press Work | Rhode Island |
| 32 | Joseph Jr. Virriea | 1 | Son | — | Rhode Island |
| 33 | Frank Medeiros | 29 | Head | Laborer | Rhode Island |
| 34 | Mary Medeiros | 24 | Wife | — | Rhode Island |
| 35 | Regina Medeiros | 0 | Daughter | — | Rhode Island |
| 36 | Mary C. Perry | 56 | Head | — | Azores |
| 37 | Mary Perry | 32 | Daughter | Carder | Rhode Island |
| 38 | Jacqueline Perry | 29 | Daughter | Operator | Rhode Island |
| 39 | William Perry | 27 | Son | Foot Press Operator | Rhode Island |
| 40 | Daughter Hilda | None | F | Private Family | — |
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)