Mary Cassidy — 1940 US Census Record

Linked across censuses

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

Our Model Tree links this Mary Cassidy across the 1920, 1930 and 1940 US Censuses in Bronx-County, New York (XGBoost, ~Confirmed) — first a spouse (b.~1901), then head of a 4-person household.

Age 39 b. ~1901 Female Spouse Born: Ireland Married

1940 Census Record Details

Census Year	1940
Location	Bronx-County, New York
Surname	Cassidy
Given Name	Mary
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	39
Marital Status	Married
Birthplace	Ireland
1935 Residence (City)	NYC
1935 Residence (County)	Bronx
Naturalization Status	First papers filed
Additional Details
Occupation	Superintendent
Industry	Apt. Bldg
Class of Worker	PW
Hours Worked	48
Income (1939)	740
Highest Grade	H 8
1935 Residence	NY
Birth Country	Ireland
Birthplace (normalized)	ireland
Occupation	Superintendent
Township / Ward	Nyc
Est. Birth Year	~1901

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
Patrick Cassidy	Head	—	37	~1903
John Cassidy	Son	—	4	~1936
Bernard Cassidy	Son	—		~1940
Mary Cassidy	Spouse	—	39	~1901

Census Appearances

1920

New York, …

Spouse, age 25

New York, New York · implied b. ~1895 — 4 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Cassidy
Given Name	Martha
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	25
Marital Status	Married
Birthplace	Ireland
Year of Immigration	1911
Naturalization Status	Naturalized
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
Year of Naturalization	1917
Birthplace (normalized)	ireland

1930

New York, …

Spouse, age 30

New York, New York · implied b. ~1900 — 6 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Cassidy
Given Name	Mary
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	30
Marital Status	Married
Birthplace	Ireland
Naturalization Status	Naturalized
Year of Immigration	1912
Age at First Marriage	17
Father's Birthplace	Ireland
Mother's Birthplace	Ireland
Occupation	Housewife
Can Read/Write	Yes
Mother Tongue	Eng
Birth Country	Ireland
Birthplace (normalized)	ireland

1940

Bronx-County, New …

Spouse, age 39

Bronx-County, New York · implied b. ~1901 — 4 household members

Surname	Cassidy
Given Name	Mary
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	39
Marital Status	Married
Birthplace	Ireland
1935 Residence (City)	NYC
1935 Residence (County)	Bronx
Naturalization Status	First papers filed
Occupation	Superintendent
Industry	Apt. Bldg
Class of Worker	PW
Hours Worked	48
Income (1939)	740
Highest Grade	H 8
1935 Residence	NY
Birth Country	Ireland
Birthplace (normalized)	ireland

Model Tree

Linked across censuses

Our Model Tree links Mary Cassidy 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 Cassidy

Spouse · 1940 · age 39 · b. ~1901 · 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-t0627-02496-00632)

Line	Name	Age	Relation	Occupation	Birthplace
41	John John	29	Son	Clerk	NY
42	Helen John	24	Daughter	Nurse	NY
43	Mae John	20	Daughter	—	NY
44	Joseph Mcloghlin	31	Boarder	Laboratory Asst.	NY
45	Harry Sacks	48	Head	Proprietor	Russia
46	Anna Sacks	42	Wife	—	NY
47	Albert Sacks	20	Son	—	NY
48	Michael Flanagan	38	Head	Chauffeur	Ireland
49	Elizabeth Flanagan	43	Wife	—	Scotland
50	Barbara Flanagan	4	Daughter	—	NY
51	Patrick Cassidy	37	Head	Trackman	Ireland
52	Mary Cassidy THIS PERSON	39	Wife	Superintendent	Ireland
53	John Cassidy	4	Son	—	NY
54	Bernard Cassidy	0	Son	—	NY
55	Edward Cahill	62	Head	Guard	NY
56	Alice Cahill	58	Wife	—	NY
57	Guarda Cahill	32	Daughter	Teacher	NY
58	John Cahill	31	Son	Electrician	NY
59	Edward Cahill	25	Son	Clerk	NY
60	Anne Cahill	23	Daughter	Statistician	NY
61	Paul Cahill	20	Son	New-Work	NY
62	Rita Cahill	15	Daughter	—	NY
63	Herman Steinbeck	70	Head	—	Germany
64	Wilmina Steinbeck	60	Wife	—	Germany
65	Helen Waslick	23	Lodger	Waitress	Mass
66	Joseph Kashuba	29	Lodger	Chauffeur	Conn
67	Rosa Kindmeyer	63	Head	—	Germany
68	Robert Berkman	58	Lodger	Collector	NY
69	Veronica Johnson	27	Lodger	Typist	NY
70	Marion Stern	29	Lodger	Saleslady	Pennsylvania
71	Peter Pannella	29	Lodger	Laborer	NY
72	William Phillips	59	Head	Watch Maker	England
73	Jane Phillips	55	Wife	—	England
74	John C. Phillips	20	Son	Sprayer	So. Africa
75	William A. Phillips	32	Son	Electrician	England
76	Bertha Phillips	30	Daughter in law	Waitress	NY
77	Barbara Phillips	7	Grandchild	—	NY
78	Mary Garrett	48	Head	—	NY
79	Marion Garrett	22	Daughter	Typist	NY
80	Eileen Garrett	13	Daughter	—	NY

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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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