Robert Willis — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Marion-County, Iowa

Our Model Tree links this Robert Willis across the 1920, 1930 and 1940 US Censuses in Marion-County, Iowa (XGBoost, ~Confirmed) — first a head (b.~1890), then head of a 4-person household.

Age 50 b. ~1890 Male Head Born: Iowa Married

1940 Census Record Details

Census Year	1940
Location	Marion-County, Iowa
Surname	Willis
Given Name	Robert S.
Relationship to Head	Head
Sex	M
Color / Race	White
Age	50
Marital Status	Married
Birthplace	Iowa
1935 Residence (City)	Dallas Town
1935 Residence (County)	Marion
Additional Details
Occupation	Laborer
Industry	Coal Mining
Class of Worker	PW
Hours Worked	12
Income (1939)	180
Highest Grade	No 8
1935 Residence	Same place
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa
Occupation	Laborer
Township / Ward	Dallas Town
Est. Birth Year	~1890

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 Robert	Age	Birth yr
Robert Willis	Head	—	50	~1890
Maud Willis	Spouse	—	49	~1891
Duane Willis	Son	—	21	~1919
David Willis	Son	—	6	~1934

Census Appearances

1920

Marion, Iowa

Head, age 29

Marion, Iowa · implied b. ~1891 — 5 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Willis
Given Name	Robert S.
Relationship to Head	Head
Sex	M
Color / Race	White
Age	29
Marital Status	Married
Birthplace	Iowa
Year of Immigration	1914
Father's Birthplace	England
Mother's Birthplace	England
Occupation	Miner Coal
Industry	Coal mine
Class of Worker	W
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Home Owned/Rented	O
Home Free/Mortgaged	M
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa

1930

Marion, Iowa

Head, age 41

Marion, Iowa · implied b. ~1889 — 5 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Willis
Given Name	Robert J
Relationship to Head	Head
Sex	M
Color / Race	White
Age	41
Marital Status	Married
Birthplace	Iowa
Age at First Marriage	23
Father's Birthplace	England
Mother's Birthplace	England
Occupation	Miner
Industry	Coal
Class of Worker	W
Can Read/Write	Yes
Home Owned/Rented	O
Home Value / Rent	2000
Radio Set	R
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa

1940

Marion-County, Iowa

Head, age 50

Marion-County, Iowa · implied b. ~1890 — 4 household members

Surname	Willis
Given Name	Robert S.
Relationship to Head	Head
Sex	M
Color / Race	White
Age	50
Marital Status	Married
Birthplace	Iowa
1935 Residence (City)	Dallas Town
1935 Residence (County)	Marion
Occupation	Laborer
Industry	Coal Mining
Class of Worker	PW
Hours Worked	12
Income (1939)	180
Highest Grade	No 8
1935 Residence	Same place
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa

Model Tree

Linked across censuses

Our Model Tree links Robert Willis across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.

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This person

Anchor record

Robert Willis

Head · 1940 · age 50 · b. ~1890 · 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 — Marion-County, Iowa Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-01181-00053)

Line	Name	Age	Relation	Occupation	Birthplace
1	Joan Seddon	1	Daughter	—	Iowa
2	Harry Joe Seddon	0	Son	—	Iowa
3	Harry Sech	58	Head	Driller	Iowa
4	William J. Dixon	32	Head	Catery Runer	Iowa
5	Ruth Dixon	31	Wife	—	Iowa
6	Herbert Dixon	6	Son	—	Iowa
7	Gilbert Dixon	2	Son	—	Iowa
8	Robert S. Willis THIS PERSON	50	Head	Laborer	Iowa
9	Maud Willis	49	Wife	—	Iowa
10	Duane Willis	21	Son	Section	Iowa
11	David Lee Willis	6	Son	—	Iowa
12	John Brown	61	Head	Tool Maker	Indiana
13	Emma Brown	55	Wife	—	Iowa
14	Millard Brown	29	Son	Attendant	Illinois
15	James H. Rivers	55	Head	Ditcher	Iowa
16	Iva Rivers	44	Wife	—	Iowa
17	Wilma Ab Rivers	21	Daughter	Housework	Iowa
18	Bernice Rivers	18	Daughter	—	Iowa
19	Clarence Fedro	28	Head	Section	Iowa
20	Mary Fedro	30	Wife	—	Iowa
21	Richard Lee Fedro	2	Son	—	Iowa
22	Rose Proutt	72	Head	—	Iowa
23	Gail Bleasdale	31	Lodger	Teacher	Iowa
24	Glen C. Caulkins	35	Head	Salesman	Iowa
25	Mary Helen Caulkins	32	Wife	—	Iowa
26	Jerry Max Caulkins	5	Son	—	Iowa
27	Jimmy Theron Caulkins	3	Son	—	Iowa
28	Robert M. Halle	38	Head	Janitor	Iowa
29	Lois Halle	33	Wife	—	Iowa
30	Robert Wayne Halle	16	Son	—	Iowa
31	Robert M. Rumbaugh	81	Head	—	Pennsylvania
32	Cynthia E. Rumbaugh	74	Wife	—	Iowa
33	Mitchell Horton	64	Head	Laborer	Iowa
34	Aadie Horton	47	Wife	—	Iowa
35	John Carter	47	Head	Laborer	Tennessee
36	Nancy Carter	42	Wife	—	Tennessee
37	Marie Carter	16	Daughter	—	Tennessee
38	Welford Carter	10	Son	—	Iowa
39	A. B. Carter	9	Son	—	Iowa
40	John Lackey	54	Head	Enameler	Iowa

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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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