MC
Mary Costa — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Erie-County, New York
Our Model Tree links this Mary Costa across the 1930 and 1940 US Censuses in Erie-County, New York (XGBoost, ~Confirmed) — first a spouse (b.~1889), then head of a 8-person household.
Age 51
b. ~1889
Female
Spouse
Born: Italy
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Erie-County, New York |
| Surname | Costa |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | Italy |
| 1935 Residence (City) | Buffalo city |
| 1935 Residence (County) | Erie |
| Naturalization Status | Alien |
| Additional Details | |
| Industry | 0 |
| Highest Grade | 0 |
| 1935 Residence | Same place |
| Birth Country | Italy |
| Birthplace (normalized) | italy |
| Township / Ward | Buffalo City |
| Est. Birth Year | ~1889 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Michael Costa | Son | — | 12 | ~1928 |
| Frank Costa | Son | — | 19 | ~1921 |
| Angeline Costa | Daughter | — | 21 | ~1919 |
| John Costa | Son | — | 10 | ~1930 |
| Joseph Costa | Head | — | 58 | ~1882 |
| Mary Costa | Spouse | — | 51 | ~1889 |
| Josephine Costa | Daughter | — | 17 | ~1923 |
| Mary Costa | Daughter | — | 15 | ~1925 |
Census Appearances
1930
Erie, New …
Other, age 42
Erie, New York · implied b. ~1888 — 5 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 | 42 |
| Marital Status | Married |
| Birthplace | Italy |
| Naturalization Status | Naturalized |
| Year of Immigration | 1903 |
| Age at First Marriage | 25 |
| Father's Birthplace | Italy |
| Mother's Birthplace | Italy |
| Can Read/Write | Yes |
| Mother Tongue | Italian |
| Birth Country | Italy |
| Birthplace (normalized) | italy |
1940
Erie-County, New …
Spouse, age 51
Erie-County, New York · implied b. ~1889 — 8 household members
| Surname | Costa |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | Italy |
| 1935 Residence (City) | Buffalo city |
| 1935 Residence (County) | Erie |
| Naturalization Status | Alien |
| Industry | 0 |
| Highest Grade | 0 |
| 1935 Residence | Same place |
| 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 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Costa
Spouse · 1940 · age 51 · b. ~1889 · 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 — Erie-County, New York
Open full size
1940 US Federal Census — Erie-County, New York
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02824-00823)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Daniel Michalski | 42 | Head | Laborer | Poland |
| 2 | Elizabeth Michalski | 33 | Wife | — | Austria |
| 3 | Casimilla Michalski | 15 | Daughter | — | Buffalo |
| 4 | Barney Bukemwich | 46 | Roomer | Fireman | Austria |
| 5 | Malczos Maryl | 56 | Roomer | Laborer | Austria |
| 6 | Joseph Ventura | 28 | Head | 50 | Buffalo |
| 7 | Florence Ventura | 26 | Wife | 24 | Buffalo |
| 8 | Joanna Ventura | 5 | Daughter | — | Buffalo |
| 9 | Angelo Paniccia | 45 | Head | Cook | Italy |
| 10 | Chorinda Paniccia | 33 | Wife | — | Italy |
| 11 | Lena Paniccia | 12 | Daughter | — | Buffalo |
| 12 | Louis Paniccia | 7 | Son | — | Buffalo |
| 13 | Clarence Bradley | 50 | Head | 52 | New Jersey |
| 14 | Charles Reggins | 58 | Head | Laborer | Italy |
| 15 | Mary Reggins | 48 | Wife | — | Italy |
| 16 | Sam Reggins | 19 | Son | 0 | Buffalo |
| 17 | Rose Reggins | 18 | Daughter | 0 | Buffalo |
| 18 | Charles Jr. Reggins | 14 | Son | — | Buffalo |
| 19 | Joe Reggins | 11 | Son | — | Buffalo |
| 20 | Mamie Reggins | 9 | Daughter | — | Buffalo |
| 21 | Antinetta Reggins | 7 | Daughter | — | Buffalo |
| 22 | Joseph Frank Mondell | 68 | Head | 0 | Alabama |
| 23 | Vetta Mondell | 67 | Wife | — | Mohawk |
| 24 | Charles Thomas | 14 | Grand-son | — | New York |
| 25 | Joseph Costa | 58 | Head | Machine Helper | Italy |
| 26 | Mary Costa THIS PERSON | 51 | Wife | — | Italy |
| 27 | Angeline Costa | 21 | Daughter | 20 | Buffalo |
| 28 | Frank Costa | 19 | Son | 0 | Buffalo |
| 29 | Josephine Costa | 17 | Daughter | 0 | Buffalo |
| 30 | Mary Costa | 15 | Daughter | 0 | Buffalo |
| 31 | Michael Costa | 12 | Son | — | Buffalo |
| 32 | John Costa | 10 | Son | — | Buffalo |
| 33 | Philomena Riggins | 56 | Head | — | Italy |
| 34 | Mary Riggins | 14 | Daughter | — | Italy |
| 35 | Conde Peoples | 28 | Head | 20 | California |
| 36 | Estelle Peoples | 27 | Wife | — | Alabama |
| 37 | Irving Peoples | 7 | Son | — | Buffalo |
| 38 | Conde Jr. Peoples | 5 | Son | — | Buffalo |
| 39 | Fredrick Peoples | 2 | Son | — | Buffalo |
| 40 | Michael Peoples | 0 | Son | — | Buffalo |
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)