Mary Cahill — 1940 US Census Record

Linked across censuses

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

Our Model Tree links this Mary Cahill across the 1920, 1930 and 1940 US Censuses in Bronx-County, New York (XGBoost, ~Confirmed) — first a spouse (b.~1890), then head of a 5-person household.

Age 50 b. ~1890 Female Spouse Born: Ireland Married

1940 Census Record Details

Census Year	1940
Location	Bronx-County, New York
Surname	Cahill
Given Name	Mary A.
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	50
Marital Status	Married
Birthplace	Ireland
1935 Residence (City)	New York City
1935 Residence (County)	Bronx
Naturalization Status	Naturalized
Additional Details
Income (1939)	0
Highest Grade	H 4
1935 Residence	Same place
Birth Country	Ireland
Birthplace (normalized)	ireland
Township / Ward	New York City
Est. Birth Year	~1890

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.

5 people recorded at the same address in the 1940 census.

Name	Relation to head	Relative to Mary	Age	Birth yr
Mary Cahill	Spouse	—	50	~1890
James Cahill	Son	—	21	~1919
John Cahill	Son	—	22	~1918
Vera Cahill	Daughter	—	18	~1922
William Cahill	Son	—	12	~1928

Census Appearances

1920

Kings, New …

Spouse, age 30

Kings, New York · implied b. ~1890 — 3 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Cahill
Given Name	Mary
Relationship to Head	wife
Sex	F
Color / Race	White
Age	30
Marital Status	Married
Birthplace	Ireland
Year of Immigration	1911
Naturalization Status	Alien
Father's Birthplace	Ireland
Mother's Birthplace	Ireland
Occupation	none
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Mother Tongue	English
Birth Country	Ireland
Birthplace (normalized)	ireland

1930

Kings, New …

Spouse, age 40

Kings, New York · implied b. ~1890 — 4 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Cahill
Given Name	Mary
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	40
Marital Status	Married
Birthplace	Ireland
Age at First Marriage	35
Father's Birthplace	Ireland
Mother's Birthplace	Ireland
Can Read/Write	Yes
Birth Country	Ireland
Birthplace (normalized)	ireland

1940

Bronx-County, New …

Spouse, age 50

Bronx-County, New York · implied b. ~1890 — 5 household members

Surname	Cahill
Given Name	Mary A.
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	50
Marital Status	Married
Birthplace	Ireland
1935 Residence (City)	New York City
1935 Residence (County)	Bronx
Naturalization Status	Naturalized
Income (1939)	0
Highest Grade	H 4
1935 Residence	Same place
Birth Country	Ireland
Birthplace (normalized)	ireland

Model Tree

Linked across censuses

Our Model Tree links Mary Cahill 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 Cahill

Spouse · 1940 · age 50 · b. ~1890 · 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 — Bronx-County, New York Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-02495-00167)

Line	Name	Age	Relation	Occupation	Birthplace
41	Mary A. Cahill THIS PERSON	50	Wife	—	Ireland
42	John F. Cahill	22	Son	Clerk	New York
43	James J. Jr. Cahill	21	Son	Messenger	New York
44	Vera M. Cahill	18	Daughter	—	New York
45	William T. Cahill	12	Son	—	New York
46	George C. Harwood	55	Head	—	Maine
47	Susan Harwood	56	Wife	—	New York
48	Frank C. Smiley	40	Head	Printer	New York
49	Sophie B. Smiley	41	Wife	—	New York
50	Marie Benke	65	Head	—	New York
51	Anna Benke	38	Daughter	Secretary	New York
52	Helen Sullivan	39	Head	—	New York
53	Patricia Sullivan	13	Daughter	—	New York
54	Walter Lohe	43	Head	Bartender	New York
55	Grace Bensburg	35	Boarder	—	New York
56	Edward J. Higgins	47	Head	Mechanic	New York
57	Lucy F. Higgins	44	Wife	Clerk	New York
58	Josephine Mcauliffe	57	Head	Clerical	New York
59	John J. Mcauliffe	50	Wife	Clerk	New York
60	Delia M. Coy	68	Mother-in-law	—	Ireland
61	William R. Clooney	64	Head	—	New York
62	Virginia Clooney	63	Wife	—	New York
63	James J. Watson	42	Head	Policeman	New York
64	Jane Watson	56	Wife	—	New York
65	Mary M. Watson	74	Mother	—	Ireland
66	Edward Weisheimer	68	Head	—	New York
67	Mary Weisheimer	59	Wife	—	New York
68	Arthur Weisheimer	36	Son	Bookkeeper	New York
69	Otto Volkmann	46	Head	Clerk	New York
70	Virginia Volkmann	42	Wife	—	New York
71	Virginia Volkmann	19	Daughter	Clerk	New York
72	James J. Donnelly	43	Head	Special Officer	New York
73	Sophie M. Donnelly	48	Wife	Elevator Operator	New York
74	Mary M. Ruff	53	Head	Fore Lady	Mass.
75	Herman G. Ruff	32	Son	Bookkeeper	New York
76	Rosemarie L. Ruff	26	Daughter	Saleslady	New York
77	Jack S. Goodman	43	Head	Chauffeur	New York
78	Lillian Goodman	43	Wife	—	New York
79	Mary E. Young	75	Mother-in-law	—	New York
80	William Puschke	39	Head	Maintenance	Germany

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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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