Hans Hansen — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Black-Hawk-County, Iowa

Our Model Tree links this Hans Hansen across the 1920, 1930 and 1940 US Censuses in Black-Hawk-County, Iowa (XGBoost, ~Confirmed) — first a head (b.~1883), then head of a 5-person household.

Age 57 b. ~1883 Male Head Born: Denmark Married

1940 Census Record Details

Census Year	1940
Location	Black-Hawk-County, Iowa
Surname	Hansen
Given Name	Hans C.
Relationship to Head	Head
Sex	M
Color / Race	White
Age	57
Marital Status	Married
Birthplace	Denmark
1935 Residence (City)	Cedar Falls City
1935 Residence (County)	Black Hawk
Naturalization Status	Naturalized
Additional Details
Occupation	Carpenter
Industry	Contractor
Class of Worker	PW
Hours Worked	40
Income (1939)	2250
Highest Grade	8
1935 Residence	Same place
Birth Country	Denmark
Birthplace (normalized)	denmark
Occupation	Carpenter
Township / Ward	Cedar Falls City
Est. Birth Year	~1883

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.

5 people recorded at the same address in the 1940 census.

Name	Relation to head	Relative to Hans	Age	Birth yr
Ethel Hansen	Daughter	—	20	~1920
Margaret Hansen	Daughter	—	16	~1924
Hans Hansen	Head	—	57	~1883
Melton Hansen	Son	—	7	~1933
Anna Hansen	Spouse	—	57	~1883

Census Appearances

1920

Blackhawk, Iowa

Head, age 38

Blackhawk, Iowa · implied b. ~1882 — 3 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Hansen
Given Name	Hans C.
Relationship to Head	Head
Sex	M
Color / Race	White
Age	38
Marital Status	Married
Birthplace	Denmark
Naturalization Status	un
Father's Birthplace	Denmark
Mother's Birthplace	Denmark
Occupation	Carpenter
Industry	House
Class of Worker	W
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Mother Tongue	Danish
Home Owned/Rented	O
Home Free/Mortgaged	M
Birth Country	Denmark
Birthplace (normalized)	denmark

1930

Black Hawk, …

Head, age 48

Black Hawk, Iowa · implied b. ~1882 — 4 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Hansen
Given Name	Hans C.
Relationship to Head	Head
Sex	M
Color / Race	White
Age	48
Marital Status	Married
Birthplace	Denmark
Age at First Marriage	06X1
Father's Birthplace	Denmark
Mother's Birthplace	Denmark
Occupation	Carpenter
Class of Worker	W
Can Read/Write	Yes
Mother Tongue	Danish
Veteran	6000
Birth Country	Denmark
Birthplace (normalized)	denmark

1940

Black-Hawk-County, Iowa

Head, age 57

Black-Hawk-County, Iowa · implied b. ~1883 — 5 household members

Surname	Hansen
Given Name	Hans C.
Relationship to Head	Head
Sex	M
Color / Race	White
Age	57
Marital Status	Married
Birthplace	Denmark
1935 Residence (City)	Cedar Falls City
1935 Residence (County)	Black Hawk
Naturalization Status	Naturalized
Occupation	Carpenter
Industry	Contractor
Class of Worker	PW
Hours Worked	40
Income (1939)	2250
Highest Grade	8
1935 Residence	Same place
Birth Country	Denmark
Birthplace (normalized)	denmark

Model Tree

Linked across censuses

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

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This person

Anchor record

Hans Hansen

Head · 1940 · age 57 · b. ~1883 · 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 — Black-Hawk-County, Iowa Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-01139-00390)

Line	Name	Age	Relation	Occupation	Birthplace
1	Vevia Wright	53	Wife	—	Illinois
2	Lloyd E. Wright	20	Son	Clerk	Iowa
3	Elmer M. Flood	39	Head	Proprietor	Illinois
4	Elizabeth H. Flood	38	Wife	—	Illinois
5	Helen J. Flood	16	Daughter	—	Illinois
6	Elmer M. Flood	13	Son	—	Illinois
7	Hans C. Hansen THIS PERSON	57	Head	Carpenter	Denmark
8	Anna P. Hansen	57	Wife	—	Denmark
9	Margaret M. Hansen	16	Daughter	—	Iowa
10	Melton M. Hansen	7	Son	—	Iowa
11	Ethel E. Hansen	20	Daughter	—	Iowa
12	Marie Knudsen	71	Head	—	Denmark
13	Leo O. Knudsen	39	Son	Machinist	Iowa
14	Edna E. Knudsen	36	Daughter	Bookkeeper	Iowa
15	Here Knudsen	None	Ends	—	21st
16	Homer A. Rosenberger	56	Head	Carrier	Iowa
17	Gail G. Rosenberger	50	Wife	—	Iowa
18	Sarah E. Rosenberger	20	Daughter	—	Iowa
19	Elen O. Rosenberger	17	Daughter	—	Iowa
20	Marian B. Rosenberger	15	Daughter	—	Iowa
21	Charles W. Rosenberger	13	Son	—	Iowa
22	Henry S. Dorman	49	Head	Machinist	New Jersey
23	Pearl E. Dorman	41	Wife	—	Iowa
24	Here Dorman	None	Ends	—	Clay
25	Lawrence W. Whitford	41	Head	Teacher	Wisconsin
26	Blanche I. Whitford	41	Wife	—	Iowa
27	Billy Whitford	10	Son	—	Iowa
28	Tony R. Whitford	9	Son	—	Iowa
29	Albert J. Krohn	53	Head	Barber	Iowa
30	Florence H. Krohn	49	Wife	—	Iowa
31	John T. Bogg	34	Head	—	Iowa
32	Esther L. Bogg	31	Wife	—	Iowa
33	Thomas W. Bogg	11	Son	—	Iowa
34	David L. Bogg	4	Son	—	Iowa
35	Here Bogg	None	End	—	21st
36	Kenneth B. Trimbell	33	Head	Machinist	Iowa
37	Maxie C. Trimbell	29	Wife	Bookkeeper	California
38	Here Trimbell	None	Ends	—	Washington
39	Helmar Von Dorn	34	Head	District Manager	Kansas
40	Helene A. Von Dorn	35	Wife	—	Michigan

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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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