John Cox — 1940 US Census Record

Model Tree available

1940 United States Federal Census · Keokuk-County, Iowa

Our Model Tree links this John Cox across the 1920, 1930 and 1940 US Censuses in Keokuk-County, Iowa (XGBoost, ~Confirmed), with identified parents John — first a head (b.~1911), then head of a 4-person household.

Age 29 b. ~1911 Male Head Born: Iowa Married

1940 Census Record Details

Census Year	1940
Location	Keokuk-County, Iowa
Surname	Cox
Given Name	John Jr.
Relationship to Head	Head
Sex	M
Color / Race	White
Age	29
Marital Status	Married
Birthplace	Iowa
1935 Residence (City)	English River Township
1935 Residence (County)	Keokuk County
Additional Details
Occupation	Truck driver
Industry	Private hauling
Class of Worker	OA
Hours Worked	50
Income (1939)	79
Highest Grade	H 4
1935 Residence	Same place
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa
Occupation	Truck Driver
Township / Ward	English River Township
Est. Birth Year	~1911

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 Cox	Head	—	29	~1911
Larry Cox	Son	—		~1940
Emmet Cox	Son	—	6	~1934
Iler Cox	Spouse	—	27	~1913

Census Appearances

1920

Keokuk, Iowa

Son, age 8

Keokuk, Iowa · implied b. ~1912 — 4 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Cox
Given Name	John Jr
Relationship to Head	Son
Sex	M
Color / Race	White
Age	8
Marital Status	Single
Birthplace	Iowa
Father's Birthplace	Iowa
Mother's Birthplace	Iowa
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa

1930

Keokuk, Iowa

Son, age 19

Keokuk, Iowa · implied b. ~1911 — 5 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Cox
Given Name	John Jr
Relationship to Head	Son
Sex	M
Color / Race	White
Age	19
Marital Status	Single
Birthplace	Iowa
Father's Birthplace	Iowa
Mother's Birthplace	Iowa
Occupation	Day Laborer
Industry	Odd Jobs
Class of Worker	W
Can Read/Write	Yes
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa

1940

Keokuk-County, Iowa

Head, age 29

Keokuk-County, Iowa · implied b. ~1911 — 4 household members

Surname	Cox
Given Name	John Jr.
Relationship to Head	Head
Sex	M
Color / Race	White
Age	29
Marital Status	Married
Birthplace	Iowa
1935 Residence (City)	English River Township
1935 Residence (County)	Keokuk County
Occupation	Truck driver
Industry	Private hauling
Class of Worker	OA
Hours Worked	50
Income (1939)	79
Highest Grade	H 4
1935 Residence	Same place
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa

Model Tree

Model Tree available

Our Model Tree links John Cox across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Cox (~0.92 confidence). The pedigree spans 1 generation with 1 identified ancestor.

Show:

Gen 1 Parents confidence ≈ 0.92

Father

John Cox

b. ~1867

Source father

● Household · direct · ~0.92

This person

Anchor record

John Cox

Head · 1940 · age 29 · b. ~1911 · Iowa

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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 — Keokuk-County, Iowa Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-01172-00731)

Line	Name	Age	Relation	Occupation	Birthplace
1	Alice Wolfe	35	Wife	Home Work	Iowa
2	Ruth Wolfe	12	Daughter	—	Iowa
3	Arlene Wolfe	7	Daughter	—	Iowa
4	Arland Lee Wolfe	5	Son	—	Iowa
5	Jerry Wolfe	87	Father	—	Ohio
6	George Schoenfelder	20	Head	Farm Laborer	Minnesota
7	Ida Claypool	20	Admr. girl	House Work	Iowa
8	Leonard Kirkpatrick	47	Head	Section Hand	Missouri
9	Myrtle Kirkpatrick	39	Wife	—	Iowa
10	Eldon Kirkpatrick	18	Son	Farm Laborer	Iowa
11	James Kirkpatrick	12	Son	—	Iowa
12	Shirley Kirkpatrick	8	Daughter	—	Iowa
13	Mary Helen Kirkpatrick	6	Daughter	—	Iowa
14	Will Evans	59	Head	Stone Cutter	Iowa
15	Mary C. Evans	56	Wife	—	Iowa
16	Rachael Evans	21	Daughter	House Work	Iowa
17	Warren Guy Evans	16	Son	—	Iowa
18	William Dan Evans	4	Grandson	—	Iowa
19	Jess Craven	63	Head	Care Taker	Missouri
20	Effie Craven	54	Wife	—	Iowa
21	Wayne Craven	21	Son	Ice Cream Maker	Iowa
22	John Jr. Cox THIS PERSON	29	Head	Truck Driver	Iowa
23	Iler Cox	27	Wife	—	Iowa
24	Emmet Cox	6	Son	—	Iowa
25	Larry Lee Cox	0	Son	—	Iowa
26	Fred Newsome	72	Head	Farmer	Iowa
27	Almeda Newsome	66	Wife	—	Iowa
28	Alfred J. Fitzsimmons	80	Head	—	Iowa
29	Gertrude Fitzsimmons	64	Wife	—	Iowa
30	Lucinda Ball	72	Head	—	Iowa
31	Helen Ball	25	Daughter	—	Iowa
32	Clarence D. Ball	21	Son	Farmer	Iowa
33	J. Elmer Roach	74	Head	—	Illinois
34	Leita Roach	41	Daughter	—	Oregon
35	Martin Keiser	56	Head	Maintainer Driver	Illinois
36	Verna Keiser	54	Wife	—	Illinois
37	Cleita Keiser	34	Daughter	House Work	Iowa
38	James Keiser	8	Grandson	—	Iowa
39	Byron Hahn	30	Head	Farm Laborer	Iowa
40	Dorothy Hahn	28	Wife	—	Iowa

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Pedigree Summary

John

Gen 1 · 1 parents ~0.92

Max depth 4 (1900–1950 window)

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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