Mary Costello — 1930 US Census Record

Linked across censuses

1930 United States Federal Census · Kings, New York

Our Model Tree links this Mary Costello across the 1920, 1930 and 1940 US Censuses in Kings, New York (XGBoost, ~Confirmed) — first a spouse (b.~1872), then head of a 3-person household.

Age 58 b. ~1872 Female Spouse Born: Ireland Married

1930 Census Record Details

Census Year	1930
Location	Kings, New York
Surname	Costello
Given Name	Mary
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	58
Marital Status	Married
Birthplace	Ireland
Year of Immigration	1892
Age at First Marriage	28
Father's Birthplace	Ireland
Mother's Birthplace	Ireland
Additional Details
Can Read/Write	Yes
Mother Tongue	English
Birth Country	Ireland
Birthplace (normalized)	ireland
Township / Ward	Brooklyn Boro
Est. Birth Year	~1872

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.

3 people recorded at the same address in the 1930 census.

Name	Relation to head	Relative to Mary	Age	Birth yr
Patrick Costello	Head	—	58	~1872
John Costello	Son	—	28	~1902
Mary Costello	Spouse	—	58	~1872

Census Appearances

1920

Queens, New …

Spouse, age 48

Queens, New York · implied b. ~1872 — 6 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Costello
Given Name	Mary
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	48
Marital Status	Married
Birthplace	Ireland
Father's Birthplace	Ireland
Mother's Birthplace	Ireland
Occupation	none
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Mother Tongue	Irish
Birth Country	Ireland
Birthplace (normalized)	ireland

1930

Kings, New …

Spouse, age 58

Kings, New York · implied b. ~1872 — 3 household members

Surname	Costello
Given Name	Mary
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	58
Marital Status	Married
Birthplace	Ireland
Year of Immigration	1892
Age at First Marriage	28
Father's Birthplace	Ireland
Mother's Birthplace	Ireland
Can Read/Write	Yes
Mother Tongue	English
Birth Country	Ireland
Birthplace (normalized)	ireland

1940

Kings-County, New …

Spouse, age 67

Kings-County, New York · implied b. ~1873 — 7 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Costello
Given Name	Margaret
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	67
Marital Status	Married
Birthplace	Ireland
1935 Residence (City)	New York City
1935 Residence (County)	Kings
Naturalization Status	Naturalized
Hours Worked	0
Highest Grade	8
1935 Residence	Same place
Birth Country	Ireland
Birthplace (normalized)	ireland

Model Tree

Linked across censuses

Our Model Tree links Mary Costello across 3 US Census years (1920, 1930 and 1940) in 3 locations, using XGBoost record linkage.

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This person

Anchor record

Mary Costello

Spouse · 1930 · age 58 · b. ~1872 · New York

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Confirmed / household (~0.90+) Probable / derived (~0.65–0.89) Candidate (<0.65, unverified)

Original Census Page

1930 US Federal Census — Kings, New York Open full size

Page Contents

49 people indexed on this census page (ia:1930:newyorkcensus00reel1515:0647)

Line	Name	Age	Relation	Occupation	Birthplace
1	Fleury O'Brien	29	Head	Clerical Work	New York
2	Emma O'Brien	29	Wife	—	New York
3	Frederick A. Ballantyne	56	Head	Salesman	Connecticut
4	Estella Ballantyne	59	Wife	—	Connecticut
5	Robert C. Ballantyne	25	Son	Civil Engineer	Connecticut
6	Doris Ballantyne	24	Daughter	Supervisor	New York
7	Samuel Ballantyne	45	Brother	—	New York
8	Marion Ballantyne	37	Niece	Registered Nurse	Connecticut
9	Augusta Jacobson	57	Head	—	Massachusetts
10	Lester Jacobson	27	Son	Assistant Engineer	New York
11	William Jacobson	23	Son	Clerk	New York
12	Theodore Jacobson	22	Son	Salesman	New York
13	Edward S. Bowsky	44	Head	Letter Carrier	New York
14	Anna M. Bowsky	45	Wife	—	New York
15	Anna M. Bowsky	20	Daughter	—	New York
16	Catherine C. Bowsky	15	Daughter	Clerical	New York
17	Edward J. Bowsky	7	Son	—	New York
18	John J. Bowsky	6	Son	—	New York
19	John J. Bowsky	76	Father	—	Poland
20	John M. Johansen	61	Head	Head Clerk	Denmark
21	Wilhelmina Johansen	50	Wife	—	Denmark
22	Edward Johansen	20	Son	—	New York
23	Christian Larsen	26	Head	Compositor	Denmark
24	Frega Larsen	21	Wife	—	Norway
25	Luke Mcguinness	60	Head	Salesman	Ireland
26	Mary A. Mcguinness	57	Wife	Gas Clerk	New York
27	Anna L. Mcguinness	35	Daughter	—	New York
28	Harry J. Hanley	32	Son-in-law	Title Searcher	New York
29	Grace M. Hanley	29	Daughter	—	New York
30	Harry J. Hanley	2	Grandson	—	New York
31	Mary E. Hart	29	Niece	Stenographer	New York
32	Thomas J. Hart	27	Nephew	Bank Clerk	New York
33	Barbara E. Souter	56	Head	—	New York
34	Lillie Souter	27	Daughter	—	New York
35	Harold Bentzen	32	Head	Bookkeeper	Denmark
36	Marie Bentzen	32	Wife	—	Denmark
37	Samuel Wheatley	59	Head	Civil Engineer	Delaware
38	Patrick Brawley	61	Head	Barber	Scotland
39	Mary Brawley	62	Wife	—	Pennsylvania
40	Mary E. Kennedy	42	Wife	Operator	Wyoming
41	William Kennedy	13	Son	—	New York
42	Patrick Mcdonnell	51	Head	Plasterer	Ireland
43	Julia Mcdonnell	50	Wife	—	Germany
44	Julia Mcdonnell	27	Daughter	Saleslady	New York
45	Laura Gilchrist	50	Head	Telephone Operator	New York
46	Emma Gilchrist	76	Mother	—	England
47	Patrick Costello	58	Head	Laborer	Ireland
48	Mary Costello THIS PERSON	58	Wife	—	Ireland
49	John Costello	28	Son	—	New York

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About This Record & Model Tree

This record was independently indexed by YourRoots from the 1930 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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