MC
Mary Costa — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Kings-County, New York
Our Model Tree links this Mary Costa across the 1920, 1930 and 1940 US Censuses in Kings-County, New York (XGBoost, ~Confirmed) — first a spouse (b.~1893), then head of a 4-person household.
Age 47
b. ~1893
Female
Spouse
Born: Italy
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Kings-County, New York |
| Surname | Costa |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Italy |
| 1935 Residence (City) | New York City |
| 1935 Residence (County) | Kings |
| Naturalization Status | Alien |
| Additional Details | |
| Highest Grade | No 5 |
| 1935 Residence | Same House |
| Birth Country | Italy |
| Birthplace (normalized) | italy |
| Township / Ward | New York City |
| Est. Birth Year | ~1893 |
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 | — | 47 | ~1893 |
| John Costa | Head | — | 55 | ~1885 |
| Annette Costa | Daughter | — | 18 | ~1922 |
| Domenica Costa | Daughter | — | 7 | ~1933 |
Census Appearances
1920
Kings, New …
Spouse, age 27
Kings, New York · implied b. ~1893 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Costa |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Italy |
| Father's Birthplace | Italy |
| Mother's Birthplace | Italy |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Italian |
| Birth Country | Italy |
| Year of Naturalization | Al |
| Birthplace (normalized) | italy |
1930
Kings, New …
Spouse, age 38
Kings, New York · implied b. ~1892 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Costa |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Italy |
| Naturalization Status | Naturalized |
| Year of Immigration | 1900 |
| Age at First Marriage | 20 |
| Father's Birthplace | Italy |
| Mother's Birthplace | Italy |
| Can Read/Write | Yes |
| Mother Tongue | Italian |
| Birth Country | Italy |
| Birthplace (normalized) | italy |
1940
Kings-County, New …
Spouse, age 47
Kings-County, New York · implied b. ~1893 — 4 household members
| Surname | Costa |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Italy |
| 1935 Residence (City) | New York City |
| 1935 Residence (County) | Kings |
| Naturalization Status | Alien |
| Highest Grade | No 5 |
| 1935 Residence | Same House |
| Birth Country | Italy |
| Birthplace (normalized) | italy |
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.
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This person
Anchor record
Mary Costa
Spouse · 1940 · age 47 · b. ~1893 · New York
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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 — Kings-County, New York
Open full size
1940 US Federal Census — Kings-County, New York
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02561-00851)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Angeline Rossi | 12 | Daughter | — | New York |
| 2 | Mary Ann Rossi | 11 | Daughter | — | New York |
| 3 | Salvatore Trocino | 71 | Head | — | Italy |
| 4 | Catherine Trocino | 60 | Wife | — | Italy |
| 5 | James Trocino | 37 | Son | Helper | New York |
| 6 | Salvatore Trocino | 32 | Son | Welder | New York |
| 7 | Rose Trocino | 30 | Daughter | Winder | New York |
| 8 | Vincent Trocino | 27 | Son | Laborer | New York |
| 9 | Dominick Trocino | 22 | Son | New Worker | New York |
| 10 | Catherine Trocino | 14 | Granddaughter | — | New York |
| 11 | Mary E. Kilroe | 74 | Head | — | New Jersey |
| 12 | William Kilroe | 31 | Son | Driver | New York |
| 13 | George Leaycraft | 56 | Head | Varnish Maker | New York |
| 14 | Frances Leaycraft | 46 | Wife | — | New York |
| 15 | Wilfred Ray | 38 | Head | Welder | Massachusetts |
| 16 | Mary Ray | 37 | Wife | — | New York |
| 17 | Joseph Ray | 9 | Son | — | New York |
| 18 | Albert Ray | 8 | Son | — | New York |
| 19 | William Ray | 3 | Son | — | New York |
| 20 | John Costa | 55 | Head | Barber | Italy |
| 21 | Mary Costa THIS PERSON | 47 | Wife | — | Italy |
| 22 | Annette Costa | 18 | Daughter | New Worker | New York |
| 23 | Domenica Costa | 7 | Daughter | — | New York |
| 24 | Francis Farrell | 22 | Head | Carpenter'S Helper | New York |
| 25 | Sadie Farrell | 30 | Sister | — | New York |
| 26 | Agnes Farrell | 25 | Sister | Glass Worker | New York |
| 27 | Michael Farrell | 4 | Nephew | — | New York |
| 28 | Rose Griesel | 30 | Head | — | New York |
| 29 | Rosanna Griesel | 11 | Daughter | — | New York |
| 30 | Emma Gebhardt | 41 | Head | Operator | New York |
| 31 | Louise Paggioli | 44 | Head | — | Italy |
| 32 | Louise Paggioli | 19 | Daughter | Packer | New York |
| 33 | Joseph Paggioli | 17 | Son | — | New York |
| 34 | Raymond Paggioli | 13 | Son | — | New York |
| 35 | Alice Paggioli | 9 | Daughter | — | New York |
| 36 | Joseph Farruggia | 45 | Head | Operator | Italy |
| 37 | Eleanora Farruggia | 32 | Wife | Pet Shop Attendant | New Jersey |
| 38 | Charles Farruggia | 9 | Son | — | New York |
| 39 | Eleanore Farruggia | 8 | Daughter | — | New York |
| 40 | Meyer Gabriel | 70 | Head | Salesman | Russia |
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)