John Monahan — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Berrien-County, Michigan

Our Model Tree links this John Monahan across the 1920, 1930 and 1940 US Censuses in Berrien-County, Michigan (XGBoost, ~Confirmed) — first a head (b.~1879), then head of a 6-person household.

Age 61 b. ~1879 Male Head Born: New York Married

1940 Census Record Details

Census Year	1940
Location	Berrien-County, Michigan
Surname	Monahan
Given Name	John
Relationship to Head	Head
Sex	M
Color / Race	White
Age	61
Marital Status	Married
Birthplace	New York
1935 Residence (City)	Niles City
1935 Residence (County)	Berrien
Additional Details
Occupation	Plumber
Industry	Master (Park maint)
Class of Worker	GW
Hours Worked	40
Income (1939)	457
Highest Grade	6
1935 Residence	Same place
Birth State	New York
Birth Country	United States
Birthplace (normalized)	new york
Occupation	Plumber
Township / Ward	Niles City
Est. Birth Year	~1879

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.

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

Name	Relation to head	Relative to John	Age	Birth yr
Anne Monahan	Spouse	—	56	~1884
James Monahan	Son	—	28	~1912
Irma Monahan	Daughter	—	25	~1915
Lewis Monahan	Son	—	30	~1910
Roland Monahan	Son	—	11	~1929
John Monahan	Head	—	61	~1879

Census Appearances

1920

Berrien, Michigan

Head, age 43

Berrien, Michigan · implied b. ~1877 — 7 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Monahan
Given Name	John
Relationship to Head	Head
Sex	M
Color / Race	White
Age	43
Marital Status	Married
Birthplace	New York
Father's Birthplace	Ireland
Mother's Birthplace	Ireland
Occupation	Plumber
Industry	General
Class of Worker	W
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Home Owned/Rented	R
Birth State	New York
Birth Country	United States
Birthplace (normalized)	new york

1930

Berrien, Michigan

Head, age 51

Berrien, Michigan · implied b. ~1879 — 2 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Monahan
Given Name	John
Relationship to Head	Head
Sex	M
Color / Race	White
Age	51
Marital Status	Married
Birthplace	New York
Age at First Marriage	26
Father's Birthplace	Ireland
Mother's Birthplace	Ireland
Occupation	Plumber
Industry	For himself
Class of Worker	OA
Can Read/Write	Yes
Home Owned/Rented	R
Home Value / Rent	25
Birth State	New York
Birth Country	United States
Birthplace (normalized)	new york

1940

Berrien-County, Michigan

Head, age 61

Berrien-County, Michigan · implied b. ~1879 — 6 household members

Surname	Monahan
Given Name	John
Relationship to Head	Head
Sex	M
Color / Race	White
Age	61
Marital Status	Married
Birthplace	New York
1935 Residence (City)	Niles City
1935 Residence (County)	Berrien
Occupation	Plumber
Industry	Master (Park maint)
Class of Worker	GW
Hours Worked	40
Income (1939)	457
Highest Grade	6
1935 Residence	Same place
Birth State	New York
Birth Country	United States
Birthplace (normalized)	new york

Model Tree

Linked across censuses

Our Model Tree links John Monahan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.

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This person

Anchor record

John Monahan

Head · 1940 · age 61 · b. ~1879 · Michigan

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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 — Berrien-County, Michigan Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-01732-00513)

Line	Name	Age	Relation	Occupation	Birthplace
1	Benjamin Allen	42	Head	Foreman	Michigan
2	Lillia Allen	50	Wife	—	Michigan
3	Welford Louis	48	Brother in law	Section Hand	Michigan
4	Albert E. Vanderhoof	48	Head	Helper	Illinois
5	Louise E. Vanderhoof	38	Wife	—	Minnesota
6	Vernon Vanderhoof	15	Son	—	Illinois
7	Thora Louise Vanderhoof	11	Daughter	—	Illinois
8	Albert T. Vanderhoof	10	Son	—	Wisconsin
9	Clyde A. Vanderhoof	7	Son	—	Minnesota
10	Susan E. Vanderhoof	2	Daughter	—	Michigan
11	Anna E. Berry	85	Mother	—	Ohio
12	Thad N. Walters	64	Head	Freight Conductor	Michigan
13	Maralee Allen Walters	40	Daughter	—	Michigan
14	William Mattiford	3	Grandson	—	Michigan
15	John Monahan THIS PERSON	61	Head	Plumber	New York
16	Anne Monahan	56	Wife	—	Ireland
17	Lewis Monahan	30	Son	Punch Press Oper	Michigan
18	James Monahan	28	Son	Assembler	Michigan
19	Irma Monahan	25	Daughter	—	Michigan
20	Roland Monahan	11	Son	—	Michigan
21	Emil Johnson	43	Head	Machine Shop Foreman	Sweden
22	Edna Johnson	40	Wife	—	Indiana
23	Betty J. Johnson	17	Daughter	—	Michigan
24	Beverly Johnson	13	Daughter	—	Michigan
25	Anna Kaiser	79	Mother in law	—	Germany
26	John Holy	53	Head	Watchman	Indiana
27	Ida Holy	40	Wife	—	Indiana
28	Charles Holy	17	Son	Yard Boy	Indiana
29	Martha Holy	16	Daughter	Maid	Michigan
30	Robert Holy	10	Son	—	Michigan
31	James Holy	3	Son	—	Michigan
32	Henry Amon	74	Lodger	Janitor	Iowa
33	Julius Wadel	43	Head	Assembler	Michigan
34	Edna Wadel	43	Wife	—	Michigan
35	Frederick Wadel	24	Son	Department Foreman	Michigan
36	Lester Wadel	22	Son	Assembler	Michigan
37	Loretta Wadel	13	Daughter	—	Michigan
38	Evelyn Wadel	10	Daughter	—	Michigan
39	Charles Exner	68	Head	—	Michigan
40	Anna Exner	66	Wife	—	Michigan

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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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