John Jacobson — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Lake-County, Ohio

Our Model Tree links this John Jacobson across the 1920, 1930 and 1940 US Censuses in Lake-County, Ohio (XGBoost, ~Confirmed) — first a head (b.~1885), then head of a 3-person household.

Age 55 b. ~1885 Male Head Born: Finland Married

1940 Census Record Details

Census Year	1940
Location	Lake-County, Ohio
Surname	Jacobson
Given Name	John
Relationship to Head	Head
Sex	M
Color / Race	White
Age	55
Marital Status	Married
Birthplace	Finland
1935 Residence (City)	Fairport Harbor Village
Naturalization Status	Naturalized
Additional Details
Occupation	Carpenter
Industry	Building Construction
Class of Worker	OA
Hours Worked	32
Income (1939)	0
Highest Grade	No 4
Birth Country	Finland
Birthplace (normalized)	finland
Occupation	Carpenter
Township / Ward	Fairport Harbor Village
Est. Birth Year	~1885

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 John	Age	Birth yr
Wayne Jacobson	Son	—	21	~1919
Mary Jacobson	Spouse	—	58	~1882
John Jacobson	Head	—	55	~1885

Census Appearances

1920

Lake, Ohio

Head, age 35

Lake, Ohio · implied b. ~1885

● Primary link · ~Confirmed · 1 source

XGBoost

Surname	Jacobson
Given Name	John
Relationship to Head	Head
Sex	M
Color / Race	White
Age	35
Marital Status	Married
Birthplace	Finland
Year of Immigration	1905
Naturalization Status	First papers filed
Father's Birthplace	Finland
Mother's Birthplace	Finland
Occupation	Carpenter
Industry	House
Class of Worker	W
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Mother Tongue	Finnish
Home Owned/Rented	O
Home Free/Mortgaged	F
Birth Country	Finland
Year of Naturalization	1919
Birthplace (normalized)	finland

1930

Lake, Ohio

Head, age 44

Lake, Ohio · implied b. ~1886 — 4 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Jacobson
Given Name	John
Relationship to Head	Head
Sex	M
Color / Race	White
Age	44
Marital Status	Married
Birthplace	Finland
Naturalization Status	Naturalized
Year of Immigration	1904
Age at First Marriage	21
Father's Birthplace	Finland
Mother's Birthplace	Finland
Occupation	Carpenter
Industry	House builder
Class of Worker	W
Can Read/Write	Yes
Mother Tongue	Finnish
Home Owned/Rented	O
Home Value / Rent	6000
Birth Country	Finland
Birthplace (normalized)	finland

1940

Lake-County, Ohio

Head, age 55

Lake-County, Ohio · implied b. ~1885 — 3 household members

Surname	Jacobson
Given Name	John
Relationship to Head	Head
Sex	M
Color / Race	White
Age	55
Marital Status	Married
Birthplace	Finland
1935 Residence (City)	Fairport Harbor Village
Naturalization Status	Naturalized
Occupation	Carpenter
Industry	Building Construction
Class of Worker	OA
Hours Worked	32
Income (1939)	0
Highest Grade	No 4
Birth Country	Finland
Birthplace (normalized)	finland

Model Tree

Linked across censuses

Our Model Tree links John Jacobson 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 Jacobson

Head · 1940 · age 55 · b. ~1885 · Ohio

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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 — Lake-County, Ohio Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-03094-00586)

Line	Name	Age	Relation	Occupation	Birthplace
41	Sally Jackson	25	Wife	—	Canada-English
42	Walter Humphrie	33	Lodger	Electrician	Ohio
43	Louis Polgar	22	Head	Laborer	Ohio
44	Elma Polgar	22	Wife	—	West Virginia
45	John Jacobson THIS PERSON	55	Head	Carpenter	Finland
46	Mary Jacobson	58	Wife	—	Finland
47	Wayne Jacobson	21	Son	Gas Station Man	Illinois
48	Anthony Kocsis	37	Head	Laborer	Hungary
49	Mary Kocsis	35	Wife	—	Ohio
50	Emil Kocsis	17	Son	—	Ohio
51	Adelbert Kocsis	15	Son	—	Ohio
52	Bartholomew Kocsis	5	Son	—	Ohio
53	Hilma Partanen	55	Head	—	Finland
54	Joseph Halonen	77	Head	—	Finland
55	Elizabeth Halonen	72	Wife	—	Finland
56	Steve Halonen	36	Son	Laborer	Ohio
57	Helen Halonen	28	Daughter	Laundress	Ohio
58	Mary Puhka	70	Head	—	Finland
59	Amelia Wood	44	Daughter	—	Ohio
60	Henry Nieminen	80	Head	—	Finland
61	Wilhelmina Nieminen	74	Wife	—	Finland
62	Jacob C. Mackey	41	Head	Foreman	Finland
63	Hattie Mackey	39	Wife	—	Ohio
64	Marilyn Mackey	13	Daughter	—	Ohio
65	Jack D. Mackey	7	Son	—	Ohio
66	Merle S. Mackey	4	Son	—	Ohio
67	Gust Mackey	73	Head	Laborer	Finland
68	Anna Mackey	25	Daughter	Receptionist	Ohio
69	Josephine Hilston	65	Head	—	Finland
70	Louis Pajina	65	Head	Laborer	Czechoslovakia
71	Susan Pajina	60	Wife	—	Czechoslovakia
72	Andrew Nyilas	38	Boarder	Electrician	Hungary
73	Elizabeth Nyilas	26	Daughter	—	Ohio
74	Mary E. Nyilas	5	Granddaughter	—	Ohio
75	Isaac Lillitrey	57	Head	Laborer	Finland
76	Hella Lillitrey	52	Wife	—	Finland
77	Arvo Lillitrey	25	Son	Laborer	Ohio
78	Stella Lillitrey	24	Daughter	Clerk	Ohio
79	Steve Mack	31	Head	Manager	Ohio
80	Mary Mack	57	Aunt	Cook	Yugoslavia

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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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