Harry Peterson — 1940 US Census Record

Model Tree available

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

Our Model Tree links this Harry Peterson across the 1920, 1930 and 1940 US Censuses in Black-Hawk-County, Iowa (XGBoost, ~Confirmed), with identified parents Nels & Carrie — first a head (b.~1900), then head of a 3-person household.

Age 40 b. ~1900 Male Head Born: Iowa Married

1940 Census Record Details

Census Year	1940
Location	Black-Hawk-County, Iowa
Surname	Peterson
Given Name	Harry
Relationship to Head	Head
Sex	M
Color / Race	White
Age	40
Marital Status	Married
Birthplace	Iowa
1935 Residence (City)	West Waterloo
1935 Residence (County)	Black Hawk
Additional Details
Occupation	Foundryman
Industry	Jobbing Work
Class of Worker	OA
Hours Worked	0
Highest Grade	No 8
1935 Residence	Iowa
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa
Occupation	Foundryman
Township / Ward	West Waterloo
Est. Birth Year	~1900

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.

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

Name	Relation to head	Relative to Harry	Age	Birth yr
Harry Peterson	Son	—	12	~1928
Eugene Peterson	Son	—	9	~1931
Harry Peterson	Head	—	40	~1900

Census Appearances

1920

Black Hawk, …

Son, age 19

Black Hawk, Iowa · implied b. ~1901 — 3 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Peterson
Given Name	Harry
Relationship to Head	Son
Sex	M
Color / Race	White
Age	19
Marital Status	Single
Birthplace	Iowa
Father's Birthplace	Denmark
Mother's Birthplace	Denmark
Occupation	Moulder
Industry	Foundry
Class of Worker	W
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa

1930

Black Hawk, …

Head, age 30

Black Hawk, Iowa · implied b. ~1900 — 4 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Peterson
Given Name	Harry
Relationship to Head	Head
Sex	M
Color / Race	White
Age	30
Marital Status	Married
Birthplace	Iowa
Age at First Marriage	23
Father's Birthplace	Denmark
Mother's Birthplace	Denmark
Occupation	Moulder
Industry	Foundry
Class of Worker	W
Can Read/Write	Yes
Home Owned/Rented	O
Home Value / Rent	2400
Radio Set	R
Veteran	No
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa

1940

Black-Hawk-County, Iowa

Head, age 40

Black-Hawk-County, Iowa · implied b. ~1900 — 3 household members

Surname	Peterson
Given Name	Harry
Relationship to Head	Head
Sex	M
Color / Race	White
Age	40
Marital Status	Married
Birthplace	Iowa
1935 Residence (City)	West Waterloo
1935 Residence (County)	Black Hawk
Occupation	Foundryman
Industry	Jobbing Work
Class of Worker	OA
Hours Worked	0
Highest Grade	No 8
1935 Residence	Iowa
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa

Model Tree

Model Tree available

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

Show:

Gen 1 Parents confidence ≈ 0.92

Father

Nels Peterson

b. ~1861

Source father

● Household · direct · ~0.92

Mother

Carrie Peterson

b. ~1862

Source mother

● Household · direct · ~0.92

This person

Anchor record

Harry Peterson

Head · 1940 · age 40 · b. ~1900 · Iowa

★ You are viewing this record

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-t0627-01139-01455)

Line	Name	Age	Relation	Occupation	Birthplace
41	Bernice B. Green	30	Head	Foreman	Colorado
42	Arvie E. Green	38	Wife	—	Nebraska
43	John J. Mazany	37	Head	Labor	Colorado
44	Hildegard Mazany	35	Wife	—	Iowa
45	Leola Mazany	15	Daughter	—	Iowa
46	Harry Sallee	43	Head	Mechanist	Illinois
47	Marie Sallee	48	Wife	—	Missouri
48	John H. Knoke	42	Head	Attendant	Iowa
49	Reta V. Knoke	35	Wife	—	Iowa
50	Wilma M. Knoke	15	Daughter	—	Iowa
51	Russell D. Knoke	13	Son	—	Iowa
52	Evelyn M. Knoke	11	Daughter	—	Iowa
53	Val R. Reuter	37	Head	Grocer	Iowa
54	Margaret Canfield	37	Head	Grocer	Iowa
55	Marvin J. Schuler	29	Head	Trucker	Iowa
56	Frances Schuler	29	Wife	—	Iowa
57	Marilyn J. Schuler	4	Daughter	—	Iowa
58	Delores Schuler	2	Daughter	—	Iowa
59	Carl C. Hansen	64	Head	W.P.A.	Denmark
60	Anna Hansen	62	Wife	—	Denmark
61	Edith Hansen	30	Daughter	Housework	Iowa
62	Earl L. Bergen	39	Head	Laborer	Iowa
63	Ellen L. Bergen	33	Wife	—	Iowa
64	Millie M. Bergen	12	Daughter	—	Iowa
65	Barbara L. Bergen	7	Daughter	—	Iowa
66	Arnold M. Payton	36	Head	Laborer	Iowa
67	Victor Payton	18	Son	Laborer	Iowa
68	Vernold Payton	17	Son	Laborer	Iowa
69	Bellie Payton	15	Son	—	Iowa
70	Harry Peterson THIS PERSON	40	Head	Foundryman	Iowa
71	Harry Jr. Peterson	12	Son	—	Iowa
72	Eugene Peterson	9	Son	—	Iowa
73	Walter L. Bowen	53	Head	Watchman	Iowa
74	Anna M. Bowen	48	Wife	—	Denmark
75	Reallo M. Willis	31	Head	Laborer	Iowa
76	Mabel J. Willis	26	Wife	—	Iowa
77	Shirley B. Willis	9	Daughter	—	Iowa
78	Reallo M. Jr. Willis	7	Son	—	Iowa
79	Richard D. Willis	5	Son	—	Iowa
80	Alfred A. Winder	69	Head	Caretaker	Wisconsin

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Pedigree Summary

Harry

Gen 1 · 2 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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