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Mary Costa — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Kings-County, New York

Our Model Tree links this Mary Costa across the 1930 and 1940 US Censuses in Kings-County, New York (XGBoost, ~Confirmed) — first a daughter (b.~1924), then head of a 8-person household.

Age 16 b. ~1924 Female Daughter Born: New York Single

1940 Census Record Details

Census Year1940
LocationKings-County, New York
SurnameCosta
Given NameMary
Relationship to HeadDaughter
SexF
Color / RaceWhite
Age16
Marital StatusSingle
BirthplaceNew York
1935 Residence (City)Brooklyn Borough
1935 Residence (County)Kings
Additional Details
Income (1939)0
Highest GradeHs 2
1935 ResidenceSame Place
Birth StateNew York
Birth CountryUnited States
Birthplace (normalized)new york
Township / WardBrooklyn Borough
Est. Birth Year~1924

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
Katherine Costa Daughter — 25 ~1915
Mary Costa Daughter — 16 ~1924
Frances Costa Daughter — 12 ~1928
Joseph Costa Son — 30 ~1910
Angela Costa Daughter — 31 ~1909
Anthony Costa Head — 55 ~1885
Anthony Costa Son — 20 ~1920
Pauline Costa Spouse — 51 ~1889

Census Appearances

1930
Kings, New …
Daughter, age 5
Kings, New York · implied b. ~1925 — 3 household members
●  Primary link · ~Confirmed · 2 sources
XGBoost Household
Surname Costa
Given Name Mary
Relationship to Head Daughter
Sex F
Color / Race White
Age 5
Marital Status Single
Birthplace New York
Father's Birthplace Italy
Mother's Birthplace Italy
Occupation none
Can Read/Write No
Mother Tongue Italian
Birth State New York
Birth Country United States
Birthplace (normalized) new york
1940
Kings-County, New …
Daughter, age 16
Kings-County, New York · implied b. ~1924 — 8 household members
Surname Costa
Given Name Mary
Relationship to Head Daughter
Sex F
Color / Race White
Age 16
Marital Status Single
Birthplace New York
1935 Residence (City) Brooklyn Borough
1935 Residence (County) Kings
Income (1939) 0
Highest Grade Hs 2
1935 Residence Same Place
Birth State New York
Birth Country United States
Birthplace (normalized) new york

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.
Linked across censuses
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 16 · b. ~1924 · New York
★ You are viewing this record
Sibling
Anthony Costa
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Costa
Sibling · 1940 · age 30
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Angela Costa
Sibling · 1940 · age 31
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frances Costa
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Katherine Costa
Sibling · 1940 · age 25
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 — Kings-County, New York Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-02609-00904)

Line Name Age Relation Occupation Birthplace
1 Maude Huwran 26 Daughter — New York
2 Virginia Huwran 3 Granddaughter — New York
3 Catherine Wong 68 Mother-in-law — Germany
4 George H. Lawrence 36 Head Roofer Penn.
5 Rose Lawrence 34 Wife House-Work Conn.
6 George Jr. Lawrence 9 Son — New York
7 William Bridke 71 Father-in-law — Germany
8 Eleanor Kerlin 45 Head Maker Men'S Ties New York
9 Eleanor Kerlin 21 Daughter Cashier New York
10 May Kerlin 18 Daughter — New York
11 Ernest Kastning 40 Lodger Cook Germany
12 Carl Husslein 43 Head Repairman On Automobiles Germany
13 Ella Husslein 44 Wife House-Work Germany
14 Anna Husslein 18 Daughter Beautician Germany
15 Mary Husslein 16 Daughter — Germany
16 Amanda Husslein 14 Daughter — Germany
17 Anthony Costa 55 Head Store Keeper Italy
18 Pauline Costa 51 Wife Maker Of Coat Italy
19 Angela Costa 31 Daughter Operator On Dresses New York
20 Joseph Costa 30 Son Store Keeper New York
21 Katherine Costa 25 Daughter Cutter On Dress Italy
22 Anthony Costa 20 Son Stock Clerk New York
23 Mary Costa THIS PERSON 16 Daughter — New York
24 Frances Costa 12 Daughter — New York
25 Alexander Adler 49 Head Grocery Clerk Roumania
26 Olga Adler 38 Wife — Hungary
27 Beatrice Adler 16 Daughter — New York
28 Alice Adler 13 Daughter — New York
29 Leonard Adler 10 Son — New York
30 Anna Boehler 75 Head — Germany
31 Walter Boehler 45 Son Automobile Mechanic New York
32 Henry Reese 33 Head Baker Germany
33 Emma Reese 28 Wife — Germany
34 Wilhelm Reese 1 Son — New York
35 Thomas Considine 34 Head Milk Man New York
36 Bertha Considine 33 Wife — New York
37 Thomas Considine 14 Son — New York
38 John Considine 8 Son — New York
39 Carlo Donora 42 Head Laborer Gardener Austria
40 Antonetta Donora 40 Wife Finisher On Coats Canada

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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)

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