John Brock — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Polk-County, Tennessee

Our Model Tree links this John Brock across the 1920, 1930 and 1940 US Censuses in Polk-County, Tennessee (XGBoost, ~Confirmed) — first a head (b.~1905), then head of a 3-person household.

Age 35 b. ~1905 Male Head Born: Tennessee Married

1940 Census Record Details

Census Year	1940
Location	Polk-County, Tennessee
Surname	Brock
Given Name	John H.
Relationship to Head	Head
Sex	M
Color / Race	White
Age	35
Marital Status	Married
Birthplace	Tennessee
1935 Residence (City)	R
1935 Residence (County)	Polk
Additional Details
Occupation	Farming
Industry	Own Farm
Class of Worker	OA
Hours Worked	40
Income (1939)	200
Highest Grade	H-5
1935 Residence	Tennessee
Birth State	Tennessee
Birth Country	United States
Birthplace (normalized)	tennessee
Occupation	Farming
Township / Ward	Civil District 1
Est. Birth Year	~1905

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
Nora Brock	Spouse	—	31	~1909
John Brock	Head	—	35	~1905
Gordon Brock	Son	—	3	~1937

Census Appearances

1920

Polk, Tennessee

Other, age 16

Polk, Tennessee · implied b. ~1904 — 6 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Brock
Given Name	John
Relationship to Head	Brother
Sex	M
Color / Race	White
Age	16
Marital Status	Single
Birthplace	Tennessee
Father's Birthplace	Tennessee
Mother's Birthplace	Tennessee
Occupation	Laborer
Industry	Home farm
Can Read	No
Can Write	No
Speaks English	Yes
Birth State	Tennessee
Birth Country	United States
Birthplace (normalized)	tennessee

1930

Polk, Tennessee

Other, age 25

Polk, Tennessee · implied b. ~1905 — 6 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Brock
Given Name	John H
Relationship to Head	Boarder
Sex	M
Color / Race	White
Age	25
Marital Status	Single
Birthplace	Tennessee
Father's Birthplace	Tennessee
Mother's Birthplace	Tennessee
Occupation	Farmer
Industry	General Farm
Class of Worker	W
Can Read/Write	Yes
Birth State	Tennessee
Birth Country	United States
Birthplace (normalized)	tennessee

1940

Polk-County, Tennessee

Head, age 35

Polk-County, Tennessee · implied b. ~1905 — 3 household members

Surname	Brock
Given Name	John H.
Relationship to Head	Head
Sex	M
Color / Race	White
Age	35
Marital Status	Married
Birthplace	Tennessee
1935 Residence (City)	R
1935 Residence (County)	Polk
Occupation	Farming
Industry	Own Farm
Class of Worker	OA
Hours Worked	40
Income (1939)	200
Highest Grade	H-5
1935 Residence	Tennessee
Birth State	Tennessee
Birth Country	United States
Birthplace (normalized)	tennessee

Model Tree

Linked across censuses

Our Model Tree links John Brock 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 Brock

Head · 1940 · age 35 · b. ~1905 · Tennessee

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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 — Polk-County, Tennessee Open full size

Page Contents

39 people indexed on this census page (nara:1940:m-t0627-03927-00498)

Line	Name	Age	Relation	Occupation	Birthplace
41	John H. Brock	17	Head	Farm Laborer	Tennessee
42	John H. Brock THIS PERSON	35	Head	Farming	Tennessee
43	Nora Kate Brock	31	Wife	House Keeping	Tennessee
44	Gordon H. Brock	3	Son	—	Tennessee
45	Harley Prince	39	Head	Laborer	Georgia
46	Bessie Prince	32	Wife	House Keeping	Tennessee
47	Wilfred Prince	14	Son	Student	Tennessee
48	Vincent C. Prince	12	Son	—	Georgia
49	Carrie Lee Prince	9	Daughter	—	Tennessee
50	John Wright	23	Head	Laborer	Tennessee
51	Grace Wright	23	Wife	House Keeping	Tennessee
52	Loraine Wright	1	Daughter	—	Tennessee
53	E. L. Prince	57	Head	Farming	Tennessee
54	Mary Prince	45	Wife	House Keeping	Tennessee
55	Melba Sue Prince	11	Daughter	—	Tennessee
56	E. J. Prince	19	Son	—	Tennessee
57	Betty Jane Wright	9	Granddaughter	—	Tennessee
58	C. N. Adams	65	Head	Farming	Tennessee
59	Ethel Adams	36	Wife	House Keeper	Virginia
60	Ruth Adams	22	Daughter	House Keeper	Tennessee
61	Hicks Adams	20	Son	Farming	Tennessee
62	Bonnie Adams	13	Daughter	—	Tennessee
63	C. M. Dunn	47	Head	Filling Station Operator	Tennessee
64	Essie Dunn	45	Wife	House Keeping	Tennessee
65	Norman Dunn	10	Son	—	Tennessee
66	Lake Lowe	25	Son	Machinist	Tennessee
67	Hazel Lowe	20	Daughter-in-law	—	Tennessee
68	Lewis Williams	23	Head	Truck Driver	North Carolina
69	Edith Williams	23	Wife	—	Tennessee
70	Warren Williams	1	Son	—	Tennessee
71	Edward B. Lowe	40	Head	Boat Dock Operator	Tennessee
72	Mable C. Lowe	39	Wife	—	Tennessee
73	Mack Cummins	24	Lodger	Asst Operator	Tennessee
74	Adeline Cummins	18	Lodger's Wife	—	Tennessee
75	Sym M. Lowe	67	Mother	—	Tennessee
76	William J. Stinnett	64	Head	Machinist Helper	Tennessee
77	Marcella D. Stinnett	37	Daughter	—	Tennessee
78	Nora Stinnett	30	Daughter	—	Tennessee
79	James Stinnett	25	Son	Conveyor Operator	Tennessee

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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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