Clarence Thompson — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Allamakee-County, Iowa

Our Model Tree links this Clarence Thompson across the 1920, 1930 and 1940 US Censuses in Allamakee-County, Iowa (XGBoost, ~Confirmed) — first a head (b.~1898), then head of a 4-person household.

Age 42 b. ~1898 Male Head Born: Iowa Married

1940 Census Record Details

Census Year	1940
Location	Allamakee-County, Iowa
Surname	Thompson
Given Name	Clarence T
Relationship to Head	Head
Sex	M
Color / Race	White
Age	42
Marital Status	Married
Birthplace	Iowa
1935 Residence (City)	Allamakee
Additional Details
Occupation	Salesman
Industry	Insurance
Class of Worker	OA
Hours Worked	50
Income (1939)	804
Highest Grade	8
1935 Residence	Same place
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa
Occupation	Salesman
Township / Ward	Waterville Town
Est. Birth Year	~1898

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 Clarence	Age	Birth yr
Clarence Thompson	Head	—	42	~1898
Dena Thompson	Other	—	85	~1855
Curtis Thompson	Son	—	3	~1937
Agnes Thompson	Spouse	—	31	~1909

Census Appearances

1920

Allamakee, Iowa

Other, age 22

Allamakee, Iowa · implied b. ~1898 — 33 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Thompson
Given Name	Clarence
Relationship to Head	R
Sex	M
Color / Race	White
Age	22
Marital Status	Single
Birthplace	Iowa
Father's Birthplace	Iowa
Mother's Birthplace	Iowa
Occupation	Laborer
Industry	On Farm
Class of Worker	W
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa

1930

Allamakee, Iowa

Son, age 32

Allamakee, Iowa · implied b. ~1898 — 3 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Thompson
Given Name	Clarence T.
Relationship to Head	son
Sex	M
Color / Race	White
Age	32
Marital Status	Married
Birthplace	Iowa
Age at First Marriage	30
Father's Birthplace	Iowa
Mother's Birthplace	Iowa
Occupation	Salesman
Industry	Automobiles
Class of Worker	W
Can Read/Write	Yes
Veteran	Yes
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa

1940

Allamakee-County, Iowa

Head, age 42

Allamakee-County, Iowa · implied b. ~1898 — 4 household members

Surname	Thompson
Given Name	Clarence T
Relationship to Head	Head
Sex	M
Color / Race	White
Age	42
Marital Status	Married
Birthplace	Iowa
1935 Residence (City)	Allamakee
Occupation	Salesman
Industry	Insurance
Class of Worker	OA
Hours Worked	50
Income (1939)	804
Highest Grade	8
1935 Residence	Same place
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa

Model Tree

Linked across censuses

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

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This person

Anchor record

Clarence Thompson

Head · 1940 · age 42 · b. ~1898 · 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 — Allamakee-County, Iowa Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-01136-01080)

Line	Name	Age	Relation	Occupation	Birthplace
1	Roy A Ellefson	44	Head	Laborer	Iowa
2	Alice Ellefson	44	Wife	—	Iowa
3	Verdun Ellefson	23	Son	Laborer	Iowa
4	R. Truman Truman	15	Son	—	Minnesota
5	Marion Truman	8	Daughter	—	Iowa
6	Bertha Truman	77	Mother	—	Norway
7	John L Nilson	66	Head	—	Iowa
8	Melina Nilson	63	Wife	—	Iowa
9	Clarence T Thompson THIS PERSON	42	Head	Salesman	Iowa
10	Agnes Thompson	31	Wife	—	Iowa
11	Curtis Thompson	3	Son	—	Iowa
12	Dena Thompson	85	Mother	—	Iowa
13	Selmer W. Hagen	51	Head	Merchant	Iowa
14	Estelle D Hagen	41	Wife	—	Iowa
15	James B Hagen	16	Son	—	Iowa
16	Robert W Hagen	13	Son	—	Iowa
17	Olger R Haas	49	Head	Farmer	Iowa
18	Freda Haas	34	Wife	—	Iowa
19	Gerald Haas	13	Son	—	Minnesota
20	Vernon Haas	9	Son	—	Iowa
21	Ronald Haas	7	Son	—	Iowa
22	Florence Haas	5	Daughter	—	Iowa
23	Alfred Uglum	45	Boarder	Carpenter	Iowa
24	Albert J. Nelson	57	Head	Carpenter	Iowa
25	Stella L Nelson	42	Wife	—	Iowa
26	Harriet L Nelson	18	Daughter	Clerk	Iowa
27	Marlyn Nelson	15	Daughter	—	Iowa
28	Knut S. Knuttson	76	Head	—	Iowa
29	Betsy Knuttson	72	Wife	—	Iowa
30	Otto Hanson	55	Head	Laborer	Iowa
31	Lyman Olson	48	Head	Garage	Minnesota
32	Hazel Olson	42	Wife	—	Washington
33	Howard Olson	12	Son	—	Iowa
34	Iver D Satrang	62	Head	Overseer Own	Iowa
35	Inna Satrang	69	Sister	—	Iowa
36	Escort Satrang	40	Nephew	Mechanic	Iowa
37	John R Fellows	37	Head	Manager	Iowa
38	Dorothy B Fellows	25	Wife	—	Illinois
39	Albert M Fellows	6	Son	—	Illinois
40	Nancy M Fellows	3	Daughter	—	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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