John Duffy — 1940 US Census Record

Linked across censuses

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

Our Model Tree links this John Duffy across the 1920, 1930 and 1940 US Censuses in Queens-County, New York (XGBoost, ~Confirmed) — first a head (b.~1890), then head of a 4-person household.

Age 50 b. ~1890 Male Head Born: Ireland Married

1940 Census Record Details

Census Year	1940
Location	Queens-County, New York
Surname	Duffy
Given Name	John
Relationship to Head	Head
Sex	M
Color / Race	White
Age	50
Marital Status	Married
Birthplace	Ireland
1935 Residence (City)	N.Y.C.
1935 Residence (County)	Queens
Naturalization Status	Naturalized
Additional Details
Occupation	Motorman
Industry	Railroad (BMT)
Class of Worker	PW
Hours Worked	48
Income (1939)	2800
Highest Grade	8
1935 Residence	Same place
Birth Country	Ireland
Birthplace (normalized)	ireland
Occupation	Motorman
Township / Ward	Nyc
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.

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

Name	Relation to head	Relative to John	Age	Birth yr
Marion Duffy	Daughter	—	14	~1926
John Duffy	Head	—	50	~1890
John Duffy	Son	—	11	~1929
Brigid Duffy	Spouse	—	40	~1900

Census Appearances

1920

New York, …

Head, age 32

New York, New York · implied b. ~1888 — 3 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Duffy
Given Name	John
Relationship to Head	Head
Sex	M
Color / Race	White
Age	32
Marital Status	Married
Birthplace	Ireland
Year of Immigration	1907
Naturalization Status	Naturalized
Father's Birthplace	Ireland
Mother's Birthplace	Ireland
Occupation	Inspector
Industry	Supervisory
Class of Worker	W
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Mother Tongue	English
Home Owned/Rented	R
Birth Country	Ireland
Year of Naturalization	1913
Birthplace (normalized)	ireland

1930

Queens, New …

Head, age 45

Queens, New York · implied b. ~1885 — 4 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Duffy
Given Name	John
Relationship to Head	Head
Sex	M
Color / Race	White
Age	45
Marital Status	Married
Birthplace	Ireland
Naturalization Status	Naturalized
Year of Immigration	1907
Age at First Marriage	25
Father's Birthplace	Ireland
Mother's Birthplace	Ireland
Occupation	Foreman
Industry	Gas Co
Class of Worker	W
Can Read/Write	Yes
Mother Tongue	Gaelic
Home Owned/Rented	R
Home Value / Rent	100
Radio Set	R
Veteran	No
Birth Country	Ireland
Birthplace (normalized)	ireland

1940

Queens-County, New …

Head, age 50

Queens-County, New York · implied b. ~1890 — 4 household members

Surname	Duffy
Given Name	John
Relationship to Head	Head
Sex	M
Color / Race	White
Age	50
Marital Status	Married
Birthplace	Ireland
1935 Residence (City)	N.Y.C.
1935 Residence (County)	Queens
Naturalization Status	Naturalized
Occupation	Motorman
Industry	Railroad (BMT)
Class of Worker	PW
Hours Worked	48
Income (1939)	2800
Highest Grade	8
1935 Residence	Same place
Birth Country	Ireland
Birthplace (normalized)	ireland

Model Tree

Linked across censuses

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

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This person

Anchor record

John Duffy

Head · 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 — Queens-County, New York Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-02751-00857)

Line	Name	Age	Relation	Occupation	Birthplace
41	Adeline M. Shenton	18	Daughter	—	New York
42	John Creighton	41	Head	Clerk - Office	Pennsylvania
43	Edith Creighton	45	Wife	—	Pennsylvania
44	John Jr. Creighton	2	Son	—	Pennsylvania
45	Frank F. Monahan	46	Head	Tester	New York
46	Elizabeth A. Monahan	43	Wife	—	New York
47	Elizabeth F. Monahan	21	Daughter	Clerk Office	New York
48	Charles E. Monahan	44	Brother	Maintenance Man	New York
49	James B. Beagan	54	Head	Inspector	New York
50	Mary A. Beagan	50	Wife	—	New York
51	Agnes M. Beagan	22	Daughter	Stenographer	New York
52	Walter J. Beagan	20	Son	—	New York
53	John Duffy THIS PERSON	50	Head	Motorman	Ireland
54	Brigid Duffy	40	Wife	—	Ireland
55	Marion Duffy	14	Daughter	—	New York
56	John F. Duffy	11	Son	—	New York
57	Walter F. Boltz	35	Head	Draftsman	New York
58	Beatrice J. Boltz	32	Wife	—	New York
59	Annette M. Boltz	5	Daughter	—	New York
60	Barbara R. Boltz	2	Daughter	—	New York
61	George F. Boltz	69	Father	Watchman	New York
62	Charles Jr. Dougherty	50	Head	Tester	New York
63	Evelyn Dougherty	45	Wife	—	New York
64	Everett Dougherty	18	Son	—	New York
65	Lois Dougherty	15	Daughter	—	New York
66	Carol Dougherty	10	Daughter	—	New York
67	Edith Dougherty	8	Daughter	—	New York
68	Charles Sr. Dougherty	86	Father	—	New York
69	Nicholas J. Jr. Superty	33	Head	Accountant	New York
70	Nancy M. Superty	7	Daughter	—	New York
71	Nicholas J. Sr. Superty	57	Father	Shoe Cutter	New York
72	Mary Superty	58	Mother	—	New York
73	Florence Superty	35	Sister	Stenographer	New York
74	Katherine G. Mullen	63	Head	—	New York
75	Kathleen G. Mullen	37	Daughter	—	New York
76	Margueritte V. Mullen	32	Daughter	Teacher	New York
77	Albert Becking	41	Head	Fireman	New York
78	Rebecca Becking	32	Wife	—	New York
79	Myron Becking	12	Son	—	New York
80	Marlene Becking	4	Daughter	—	New York

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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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