Thomas Callahan — 1940 US Census Record

Linked across censuses

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

Our Model Tree links this Thomas Callahan across the 1930 and 1940 US Censuses in Kings-County, New York (XGBoost, ~Confirmed) — first a head (b.~1874), then head of a 8-person household.

Age 66 b. ~1874 Male Head Born: Ireland Married

1940 Census Record Details

Census Year	1940
Location	Kings-County, New York
Surname	Callahan
Given Name	Thomas L.
Relationship to Head	Head
Sex	M
Color / Race	White
Age	66
Marital Status	Married
Birthplace	Ireland
1935 Residence (City)	Bklyn nyc
1935 Residence (County)	Kings
Naturalization Status	Naturalized
Additional Details
Occupation	Caretaker
Industry	Public School
Class of Worker	GW
Hours Worked	44
Income (1939)	1000
Highest Grade	No 8
1935 Residence	Same place
Birth Country	Ireland
Birthplace (normalized)	ireland
Occupation	Caretaker
Township / Ward	Bklyn Nyc
Est. Birth Year	~1874

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 Thomas	Age	Birth yr
Mary Callahan	Daughter	—	26	~1914
Thomas Callahan	Head	—	66	~1874
Raymond Callahan	Son	—	33	~1907
Mary Callahan	Spouse	—	55	~1885
Rose Callahan	Daughter	—	23	~1917
Lawrence Callahan	Son	—	31	~1909
Catherine Callahan	Daughter	—	20	~1920
Andrew Callahan	Son	—	35	~1905

Census Appearances

1930

Kings, New …

Head, age 55

Kings, New York · implied b. ~1875 — 2 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Callahan
Given Name	Thomas
Relationship to Head	Head
Sex	M
Color / Race	White
Age	55
Marital Status	Married
Birthplace	Ireland
Naturalization Status	Naturalized
Year of Immigration	1901
Age at First Marriage	30
Father's Birthplace	Ireland
Mother's Birthplace	Ireland
Can Read/Write	Yes
Mother Tongue	English
Home Owned/Rented	R
Home Value / Rent	50
Birth Country	Ireland
Birthplace (normalized)	ireland

1940

Kings-County, New …

Head, age 66

Kings-County, New York · implied b. ~1874 — 8 household members

Surname	Callahan
Given Name	Thomas L.
Relationship to Head	Head
Sex	M
Color / Race	White
Age	66
Marital Status	Married
Birthplace	Ireland
1935 Residence (City)	Bklyn nyc
1935 Residence (County)	Kings
Naturalization Status	Naturalized
Occupation	Caretaker
Industry	Public School
Class of Worker	GW
Hours Worked	44
Income (1939)	1000
Highest Grade	No 8
1935 Residence	Same place
Birth Country	Ireland
Birthplace (normalized)	ireland

Model Tree

Linked across censuses

Our Model Tree links Thomas Callahan across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.

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This person

Anchor record

Thomas Callahan

Head · 1940 · age 66 · b. ~1874 · 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 — Kings-County, New York Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-02574-00369)

Line	Name	Age	Relation	Occupation	Birthplace
41	Ellen Brueckmann	43	Wife	—	England
42	James Brueckmann	10	Son	—	N.Y.
43	Margaret Ryan	78	Head	—	Penn
44	Dorothy Ackerman	19	Niece	—	N.Y.
45	Frieda Lux	49	Head	—	Germany
46	Gilbert Lux	19	Son	—	N.Y.
47	Everett Dahlquist	30	Head	Real Estate Managing	N.Y.
48	Dorothy Dahlquist	24	Wife	Servant	N.Y.
49	Frieda Delehant	57	Head	Servant	Sweden
50	George Delehant	21	Son	Clerk	N.Y.
51	William Delehant	18	Son	Plumber Helper	N.Y.
52	William Sorensen	38	Lodger	Chauffeur	N.Y.
53	George Schwerge	42	Head	Guard	N.J.
54	Winifred Schwerge	37	Wife	—	Ireland
55	Thomas L. Callahan THIS PERSON	66	Head	Caretaker	Ireland
56	Mary Callahan	55	Wife	—	N.Y.
57	Andrew E. Callahan	35	Son	Electrician	N.Y.
58	Raymond Callahan	33	Son	School Helper	N.Y.
59	Lawrence Callahan	31	Son	—	N.Y.
60	Mary Callahan	26	Daughter	Clerk	N.Y.
61	Rose Callahan	23	Daughter	—	N.Y.
62	Catherine T. Callahan	20	Daughter	Clerk	N.Y.
63	Fred Nilsen	53	Head	Maintenance Man	Sweden
64	Eleanor Nilsen	47	Wife	—	N.Y.
65	Virginia Nilsen	22	Daughter	Clerk	N.Y.
66	Alice Nilsen	19	Daughter	Clerk	N.Y.
67	Thomas Nilsen	10	Son	—	N.Y.
68	Elma Nilsen	10	Son	—	N.Y.
69	Nellie Witherington	72	Mother in law	—	N.Y.
70	—	None	—	—	—
71	David Goldbaum	42	Head	Machinist	France
72	Jennie Goldbaum	36	Wife	—	Russia
73	Frank Donovan	69	Father	Bartender	N.Y.
74	James Halloran	70	Lodger	Retired Machinist	England
75	Jacob A. Jacobsen	47	Head	Maintenance Man	Norway
76	Jennie Jacobsen	42	Wife	—	N.Y.
77	John A. Jacobsen	20	Son	Machinist Helper	N.Y.
78	Jalmer Bendiksen	44	Head	Garage Supt	Norway
79	Susan Bendiksen	41	Wife	Bldg Supt	Norway
80	Leroy Bendiksen	16	Son	—	N.Y.

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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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