John Hardin — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Warren-County, Ohio

Our Model Tree links this John Hardin across the 1920, 1930 and 1940 US Censuses in Warren-County, Ohio (XGBoost, ~Confirmed) — first a head (b.~1907), then head of a 4-person household.

Age 33 b. ~1907 Male Head Born: Ohio Married

1940 Census Record Details

Census Year	1940
Location	Warren-County, Ohio
Surname	Hardin
Given Name	John C.
Relationship to Head	Head
Sex	M
Color / Race	White
Age	33
Marital Status	Married
Birthplace	Ohio
1935 Residence (City)	R
1935 Residence (County)	Clinton
Additional Details
Occupation	Farm Hand
Industry	Farm
Class of Worker	PW
Hours Worked	60
Income (1939)	266
Highest Grade	H 4
1935 Residence	Ohio
Birth State	Ohio
Birth Country	United States
Birthplace (normalized)	ohio
Occupation	Farm Hand
Township / Ward	Deerfield Township
Est. Birth Year	~1907

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
John Hardin	Head	—	33	~1907
Marie Hardin	Spouse	—	28	~1912
Charles Hardin	Son	—	8	~1932
Maryella Hardin	Daughter	—	10	~1930

Census Appearances

1920

Highland, Ohio

Other, age 12

Highland, Ohio · implied b. ~1908 — 5 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Hardin
Given Name	John E
Relationship to Head	Grandson
Sex	M
Color / Race	White
Age	12
Marital Status	Single
Birthplace	Ohio
Father's Birthplace	Ohio
Mother's Birthplace	Ohio
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Birth State	Ohio
Birth Country	United States
Birthplace (normalized)	ohio

1930

Clinton, Ohio

Other, age 23

Clinton, Ohio · implied b. ~1907 — 10 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Hardin
Given Name	John C.
Relationship to Head	R
Sex	M
Color / Race	White
Age	23
Marital Status	Married
Birthplace	Ohio
Age at First Marriage	22
Father's Birthplace	Ohio
Mother's Birthplace	Ohio
Occupation	Farmer
Industry	General farm
Class of Worker	W
Can Read/Write	Yes
Birth State	Ohio
Birth Country	United States
Birthplace (normalized)	ohio

1940

Warren-County, Ohio

Head, age 33

Warren-County, Ohio · implied b. ~1907 — 4 household members

Surname	Hardin
Given Name	John C.
Relationship to Head	Head
Sex	M
Color / Race	White
Age	33
Marital Status	Married
Birthplace	Ohio
1935 Residence (City)	R
1935 Residence (County)	Clinton
Occupation	Farm Hand
Industry	Farm
Class of Worker	PW
Hours Worked	60
Income (1939)	266
Highest Grade	H 4
1935 Residence	Ohio
Birth State	Ohio
Birth Country	United States
Birthplace (normalized)	ohio

Model Tree

Linked across censuses

Our Model Tree links John Hardin 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 Hardin

Head · 1940 · age 33 · b. ~1907 · 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 — Warren-County, Ohio Open full size

Page Contents

39 people indexed on this census page (nara:1940:m-t0627-03164-00151)

Line	Name	Age	Relation	Occupation	Birthplace
41	Margaret Parker	25	Wife	—	Indiana
42	Ruby E. Bishop	3	Daughter	—	Ohio
43	William H. Irwin	47	Head	Farmer	Ohio
44	Bressdalle Irwin	47	Wife	—	Ohio
45	M. Jean Irwin	20	Daughter	Bookkeeper	Ohio
46	Lila M. Irwin	18	Daughter	—	Ohio
47	Carolyn J. Irwin	16	Daughter	—	Ohio
48	Martha S. Irwin	13	Daughter	—	Ohio
49	Wilma J. Irwin	9	Daughter	—	Ohio
50	Clayton Penny	74	Head	—	Ohio
51	Mary Penny	76	Wife	—	Ohio
52	Clifford (X) Penny	50	Son	Farmer	Ohio
54	John C. Hardin THIS PERSON	33	Head	Farm Hand	Ohio
55	Marie L. Hardin	28	Wife	—	Ohio
56	Maryella Hardin	10	Daughter	—	Ohio
57	Charles D. Hardin	8	Son	—	Ohio
58	David Holbrook	72	Head	Farm Manager	Kentucky
59	Etta (X) Holbrook	69	Wife	—	Kentucky
60	Joseph Morris	32	Head	Machinist	Kentucky
61	Lora (X) Morris	30	Wife	—	Kentucky
62	Charles L. Morris	8	Son	—	Ohio
63	Chelokia Morris	8	Daughter	—	Ohio
64	Marvin E. Morris	6	Son	—	Ohio
65	James Morris	4	Son	—	Ohio
66	Roger K. Morris	2	Son	—	Ohio
67	R. Beverly Morris	0	Son	—	Ohio
68	Walter S. Rabenstein	26	Head	Cement Fin.	Ohio
69	Pauline Rabenstein	23	Wife	—	Ohio
70	Vera L. Rabenstein	2	Daughter	—	Ohio
71	Alma C. Rapper	53	Head	Farmer	Ohio
72	Harry L. Rapper	15	Son	—	Ohio
73	John W. Rapper	11	Son	—	Ohio
74	James B. Happing	66	Head	Merchant	Illinois
75	Nellie M. Happing	70	Wife	—	Virginia
76	Gorman B. Snider	30	Head	Truck Driver	Ohio
77	Hallie L. Snider	28	Wife	—	Ohio
78	Thelma L. Snider	13	Daughter	—	Ohio
79	Norman B. Snider	11	Son	—	Ohio
80	Edith L. Snider	8	Daughter	—	Ohio

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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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