John Hendrickson — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Clayton-County, Iowa

Our Model Tree links this John Hendrickson across the 1920, 1930 and 1940 US Censuses in Clayton-County, Iowa (XGBoost, ~Confirmed) — first a head (b.~1885), then head of a 4-person household.

Age 55 b. ~1885 Male Head Born: Iowa Married

1940 Census Record Details

Census Year	1940
Location	Clayton-County, Iowa
Surname	Hendrickson
Given Name	John
Relationship to Head	Head
Sex	M
Color / Race	White
Age	55
Marital Status	Married
Birthplace	Iowa
1935 Residence (City)	McGregor Town
1935 Residence (County)	Clayton
Additional Details
Occupation	Conductor
Industry	railroad
Class of Worker	PW
Hours Worked	48
Income (1939)	2640
Highest Grade	No 8
1935 Residence	Same place
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa
Occupation	Conductor
Township / Ward	Mcgregor Town
Est. Birth Year	~1885

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
Dorothy Hendrickson	Spouse	—	55	~1885
John Hendrickson	Head	—	55	~1885
William Hendrickson	Son	—	28	~1912
Tom Hendrickson	Son	—	19	~1921

Census Appearances

1920

Clayton, Iowa

Head, age 34

Clayton, Iowa · implied b. ~1886 — 8 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Hendrickson
Given Name	John
Relationship to Head	Head
Sex	M
Color / Race	White
Age	34
Marital Status	Married
Birthplace	Iowa
Father's Birthplace	Norway
Mother's Birthplace	Norway
Occupation	Conductor
Industry	Steam Railway
Class of Worker	W
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Mother Tongue	Norwegian
Home Owned/Rented	R
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa

1930

Clayton, Iowa

Head, age 45

Clayton, Iowa · implied b. ~1885 — 8 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Hendrickson
Given Name	John
Relationship to Head	Head
Sex	M
Color / Race	White
Age	45
Marital Status	Married
Birthplace	Iowa
Age at First Marriage	21
Father's Birthplace	Norway
Mother's Birthplace	Norway
Occupation	conductor
Industry	railroad
Class of Worker	W
Can Read/Write	Yes
Home Owned/Rented	R
Home Value / Rent	15
Radio Set	R
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa

1940

Clayton-County, Iowa

Head, age 55

Clayton-County, Iowa · implied b. ~1885 — 4 household members

Surname	Hendrickson
Given Name	John
Relationship to Head	Head
Sex	M
Color / Race	White
Age	55
Marital Status	Married
Birthplace	Iowa
1935 Residence (City)	McGregor Town
1935 Residence (County)	Clayton
Occupation	Conductor
Industry	railroad
Class of Worker	PW
Hours Worked	48
Income (1939)	2640
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 John Hendrickson 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 Hendrickson

Head · 1940 · age 55 · b. ~1885 · 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 — Clayton-County, Iowa Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-01149-00508)

Line	Name	Age	Relation	Occupation	Birthplace
1	Minnie J. Strong	78	Sister	—	Iowa
2	John Hendrickson THIS PERSON	55	Head	Conductor	Iowa
3	Dorothy R. Hendrickson	55	Wife	—	Wisconsin
4	William Hendrickson	28	Son	Attendant	Iowa
5	Tom Hendrickson	19	Son	—	Iowa
6	Marlin Blumre	28	Head	Wood Cutter	Iowa
7	Edna Blumre	25	Wife	—	Iowa
8	Dixie Blumre	4	Daughter	—	Iowa
9	Jerry Blumre	1	Son	—	Wisconsin
10	Samuel Yates	50	Head	Livestock Buyer	Illinois
11	Emma Yates	43	Wife	—	Illinois
12	George Thomas Yates	11	Son	—	Iowa
13	John David Yates	3	Son	—	Iowa
14	A. F. Holtz	48	Head	Express Messenger	Wisconsin
15	Mary Holtz	48	Wife	—	Wisconsin
16	E. H. Mcghee	61	Head	Barber	Iowa
17	Mae Mcghee	60	Wife	—	Minnesota
18	H. P. Bacon	45	Head	Clerk	Minnesota
19	Laura Bacon	39	Wife	—	Minnesota
20	June Bacon	11	Daughter	—	Minnesota
21	Harold W. Bacon	9	Son	—	Minnesota
22	Clara Wheeler	37	Head	Housework	Iowa
23	Cecil Wheeler	17	Son	—	Iowa
24	Nelda Wheeler	14	Daughter	—	Iowa
25	Neil Wheeler	11	Son	—	Iowa
26	G. A. Abney	74	Head	—	Wisconsin
27	Bertha Abney	69	Wife	—	Iowa
28	Irene Phelps	50	Head	—	Wisconsin
29	Della Narran	47	Roomer	—	Minnesota
30	Lorena Gorkow	64	Head	—	Iowa
31	Victor Lewis	25	Head	Driver/Presser	Iowa
32	Alma Lewis	24	Wife	—	Illinois
33	Charles L. Yount	36	Head	Manager	Iowa
34	Helen Yount	33	Wife	—	Iowa
35	Donald Yount	10	Son	—	Iowa
36	John Montgomery	32	Head	Carpenter	Iowa
37	Marion Montgomery	31	Wife	—	Iowa
38	Beatrice Montgomery	11	Daughter	—	Iowa
39	Mildred Montgomery	6	Daughter	—	Iowa
40	Lucile Herbst	50	Head	—	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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