John Underwood — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Champaign-County, Ohio

Our Model Tree links this John Underwood across the 1920, 1930 and 1940 US Censuses in Champaign-County, Ohio (XGBoost, ~Confirmed) — first a head (b.~1888), then head of a 5-person household.

Age 52 b. ~1888 Male Head Born: Ohio Married

1940 Census Record Details

Census Year	1940
Location	Champaign-County, Ohio
Surname	Underwood
Given Name	John
Relationship to Head	Head
Sex	M
Color / Race	White
Age	52
Marital Status	Married
Birthplace	Ohio
1935 Residence (City)	Mad River Twp
1935 Residence (County)	Champaign
Additional Details
Occupation	Farmer
Industry	Farm
Class of Worker	OA
Hours Worked	60
Highest Grade	Hs 4
1935 Residence	Same place
Birth State	Ohio
Birth Country	United States
Birthplace (normalized)	ohio
Occupation	Farmer
Township / Ward	Mad River Twp
Est. Birth Year	~1888

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.

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

Name	Relation to head	Relative to John	Age	Birth yr
J Underwood	Son	—	26	~1914
Max Underwood	Son	—	16	~1924
Mark Underwood	Son	—	5	~1935
Celia Underwood	Spouse	—	48	~1892
John Underwood	Head	—	52	~1888

Census Appearances

1920

Champaign, Ohio

Head, age 31

Champaign, Ohio · implied b. ~1889 — 2 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Underwood
Given Name	John
Relationship to Head	Head
Sex	M
Color / Race	White
Age	31
Marital Status	Married
Birthplace	Ohio
Father's Birthplace	Virginia
Mother's Birthplace	Ohio
Occupation	Farmer
Industry	Home Farm
Class of Worker	OA
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Home Owned/Rented	R
Birth State	Ohio
Birth Country	United States
Birthplace (normalized)	ohio

1930

Champaign, Ohio

Head, age 41

Champaign, Ohio · implied b. ~1889 — 5 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Underwood
Given Name	John J.
Relationship to Head	Head
Sex	M
Color / Race	White
Age	41
Marital Status	Married
Birthplace	Ohio
Age at First Marriage	29
Father's Birthplace	Virginia
Mother's Birthplace	Ohio
Occupation	Farmer
Industry	General farm
Class of Worker	W
Can Read/Write	Yes
Home Owned/Rented	R
Home Value / Rent	27
Veteran	No
Birth State	Ohio
Birth Country	United States
Birthplace (normalized)	ohio

1940

Champaign-County, Ohio

Head, age 52

Champaign-County, Ohio · implied b. ~1888 — 5 household members

Surname	Underwood
Given Name	John
Relationship to Head	Head
Sex	M
Color / Race	White
Age	52
Marital Status	Married
Birthplace	Ohio
1935 Residence (City)	Mad River Twp
1935 Residence (County)	Champaign
Occupation	Farmer
Industry	Farm
Class of Worker	OA
Hours Worked	60
Highest Grade	Hs 4
1935 Residence	Same place
Birth State	Ohio
Birth Country	United States
Birthplace (normalized)	ohio

Model Tree

Linked across censuses

Our Model Tree links John Underwood 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 Underwood

Head · 1940 · age 52 · b. ~1888 · 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 — Champaign-County, Ohio Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-03037-00298)

Line	Name	Age	Relation	Occupation	Birthplace
41	Lena Mildred Hart	33	Head	Housewife	Ohio
42	Carl Edward Hart	10	Son	—	Ohio
43	Mildred Hart	5	Daughter	—	Ohio
44	Marvin Charles Hart	5	Son	—	Ohio
45	Donald Eugene Hart	2	Son	—	Ohio
46	Dustin J. R. Morris	39	Head	Inspector	Ohio
47	Mary Ann Morris	35	Wife	—	Ohio
48	Joseph Morris	3	Son	—	Ohio
49	Herman Blosser	61	Head	Farmer	Ohio
50	Vernon Sallenda Blosser	54	Wife	—	Ohio
51	John Underwood THIS PERSON	52	Head	Farmer	Ohio
52	Celia Underwood	48	Wife	Housewife	Ohio
53	J. Anthony Underwood	26	Son	Farmer	Ohio
54	Max Underwood	16	Son	—	Ohio
55	Mark Underwood	5	Son	—	Ohio
56	James D. Ormsby	60	Head	General Labor	Ohio
57	George Berry	83	Head	—	Ohio
58	Edgar Berry	24	Brother	Farmer	Ohio
59	Stella Berry	15	Sister-in-law	Housewife	Penna
60	Edwin B. O. Goodell	23	Head	Care Taker	Ohio
61	Katherine Goodell	20	Wife	Housewife	Ohio
62	Sara Goodell	2	Daughter	—	Ohio
63	Raymond Smith	47	Head	Farmer	Ohio
64	Ethel Smith	47	Wife	—	Indiana
65	Hugh J. Smith	18	Son	Farm Laborer	Ohio
66	Carl Smith	17	Son	—	Ohio
67	Thea Mae Smith	10	Daughter	—	Ohio
68	William W. Offenbacher	70	Head	Manager	Ohio
69	Mary R. Offenbacher	72	Wife	—	Ohio
70	Edgar C. O. Loudenback	66	Head	Farmer	Ohio
71	Nora Loudenback	44	Wife	House Wife	Ohio
72	Lois Loudenback	10	Daughter	—	Ohio
73	David Loudenback	9	Son	—	Ohio
74	Frances Loudenback	8	Daughter	—	Ohio
75	Jean Loudenback	6	Daughter	—	Ohio
76	Raymond Shelly	43	Head	Farmer	Ohio
77	Katie Shelly	41	Wife	—	Ohio
78	Howard Shelly	17	Son	—	Ohio
79	Warren Shelly	15	Son	—	Ohio
80	Paul Hershee	37	Head	Farmer	Penna

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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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