Mary Carroll — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Bergen-County, New Jersey

Our Model Tree links this Mary Carroll across the 1920, 1930 and 1940 US Censuses in Bergen-County, New Jersey (XGBoost, ~Confirmed) — first a spouse (b.~1893), then head of a 3-person household.

Age 47 b. ~1893 Female Spouse Born: Ireland Married

1940 Census Record Details

Census Year	1940
Location	Bergen-County, New Jersey
Surname	Carroll
Given Name	Mary
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	47
Marital Status	Married
Birthplace	Ireland
1935 Residence (City)	Waldwick borough
1935 Residence (County)	Bergen
Naturalization Status	Naturalized
Additional Details
Hours Worked	0
Income (1939)	0
Highest Grade	No 7
1935 Residence	Same place
Birth Country	Ireland
Birthplace (normalized)	ireland
Township / Ward	Waldwick Borough
Est. Birth Year	~1893

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 1940 census.

Name	Relation to head	Relative to Mary	Age	Birth yr
Margaret Carroll	Daughter	—	28	~1912
William Carroll	Head	—	50	~1890
Mary Carroll	Spouse	—	47	~1893

Census Appearances

1920

New York, …

Spouse, age 26

New York, New York · implied b. ~1894 — 3 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Carroll
Given Name	Mary
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	26
Marital Status	Married
Birthplace	Ireland
Year of Immigration	1910
Naturalization Status	Alien
Father's Birthplace	Ireland
Mother's Birthplace	Ireland
Occupation	Housework
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Mother Tongue	English
Birth Country	Ireland
Birthplace (normalized)	ireland

1930

Essex, New …

Spouse, age 37

Essex, New Jersey · implied b. ~1893 — 8 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Carroll
Given Name	Mary
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	37
Marital Status	Married
Birthplace	Ireland
Naturalization Status	Naturalized
Year of Immigration	1911
Age at First Marriage	24
Father's Birthplace	Ireland
Mother's Birthplace	Ireland
Can Read/Write	Yes
Mother Tongue	English
Birth Country	Ireland
Birthplace (normalized)	ireland

1940

Bergen-County, New …

Spouse, age 47

Bergen-County, New Jersey · implied b. ~1893 — 3 household members

Surname	Carroll
Given Name	Mary
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	47
Marital Status	Married
Birthplace	Ireland
1935 Residence (City)	Waldwick borough
1935 Residence (County)	Bergen
Naturalization Status	Naturalized
Hours Worked	0
Income (1939)	0
Highest Grade	No 7
1935 Residence	Same place
Birth Country	Ireland
Birthplace (normalized)	ireland

Model Tree

Linked across censuses

Our Model Tree links Mary Carroll 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 Carroll

Spouse · 1940 · age 47 · b. ~1893 · New Jersey

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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 — Bergen-County, New Jersey Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-02316-00029)

Line	Name	Age	Relation	Occupation	Birthplace
1	Mildred Bonura	27	Daughter	Stenographer	New Jersey
2	Marlene Bonura	25	Daughter	Stenographer	New Jersey
3	James Daniels	42	Head	Conductor	England
4	Teresa Daniels	42	Wife	—	New Jersey
5	James A. Daniels	19	Son	Clerk	New Jersey
6	Thelma Daniels	13	Son	—	New Jersey
7	Michael Wynne	70	Head	Conductor	Pennsylvania
8	Margaret D. Wynne	66	Wife	—	New York City
9	Charles Smith	73	Head	—	New Jersey
10	Catherine Smith	73	Wife	—	New Jersey
11	Howard Franklin Smith	10	Grandson	—	New Jersey
12	Georgette Nagle	53	Head	Mach. Oper.	New York
13	Fred Lippon	53	Lodger	Locomotive Engr.	Scotland
14	Frank Padien	47	Lodger	Trainman	New York
15	Carl Harder	45	Head	Truck Driver	New York
16	Lillian Harder	47	Wife	—	New York
17	Mildred Harder	18	Daughter	—	New Jersey
18	John Edw. Demarest	45	Head	Utility	New Jersey
19	Bertha Demarest	52	Wife	—	New York
20	Smith Demarest	18	Son	—	New Jersey
21	Joseph B. Thomas	38	Head	Electrician	New Jersey
22	Mary Thomas	36	Wife	—	New Jersey
23	Joseph C. Thomas	14	Son	—	New Jersey
24	George Lich	35	Head	Elect. Mechanic	New Jersey
25	Theresa Dolores Lich	28	Wife	—	Switzerland
26	Dolores Lich	8	Daughter	—	New Jersey
27	Judith Alma Lich	3	Daughter	—	New Jersey
28	William Carroll	50	Head	Fireman	New York
29	Mary Carroll THIS PERSON	47	Wife	—	Ireland
30	Margaret Carroll	28	Daughter	Secretary	New York
31	Lawrence De Ferrari	42	Head	Truck Driver	New Jersey
32	Lawrence R. De Ferrari	16	Son	—	New Jersey
33	Kenneth De Ferrari	15	Son	—	New Jersey
34	Nellie Maynard	56	Mother in law	—	Ireland
35	Charles Rickman	55	Lodger	Truck Driver	New York City
36	George Block	53	Head	Trainman	New Jersey
37	Elizabeth Block	51	Wife	—	New York City
38	Frances Block	19	Daughter	—	New Jersey
39	Ethel Block	16	Daughter	—	New Jersey
40	Robert Block	10	Son	—	New Jersey

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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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