Peter Peterson — 1940 US Census Record

Model Tree available

1940 United States Federal Census · Clinton-County, Iowa

Our Model Tree links this Peter Peterson across the 1920, 1930 and 1940 US Censuses in Clinton-County, Iowa (XGBoost, ~Confirmed), with identified parents Herman & Ida — first a head (b.~1899), then head of a 3-person household.

Age 41 b. ~1899 Male Head Born: Iowa Married

1940 Census Record Details

Census Year	1940
Location	Clinton-County, Iowa
Surname	Peterson
Given Name	Peter H.
Relationship to Head	Head
Sex	M
Color / Race	White
Age	41
Marital Status	Married
Birthplace	Iowa
1935 Residence (City)	Clinton City
1935 Residence (County)	Clinton
Additional Details
Occupation	Attorney at Law
Industry	Self
Class of Worker	E
Hours Worked	40
Income (1939)	1243
Highest Grade	Hs 4
1935 Residence	Same place
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa
Occupation	Attorney At Law
Township / Ward	Clinton City
Est. Birth Year	~1899

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 Peter	Age	Birth yr
Peter Peterson	Head	—	41	~1899
Charles Peterson	Son	—	10	~1930
Irene Peterson	Spouse	—	40	~1900

Census Appearances

1920

Clinton, Iowa

Son, age 21

Clinton, Iowa · implied b. ~1899 — 5 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Petersen
Given Name	Peter H
Relationship to Head	Son
Sex	M
Color / Race	White
Age	21
Marital Status	Single
Birthplace	Iowa
Father's Birthplace	Iowa
Mother's Birthplace	Iowa
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa

1930

Clinton, Iowa

Head, age 32

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

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Petersen
Given Name	Peter H.
Relationship to Head	Head
Sex	M
Color / Race	White
Age	32
Marital Status	Married
Birthplace	Iowa
Age at First Marriage	24
Father's Birthplace	Iowa
Mother's Birthplace	Iowa
Occupation	Lawyer
Industry	Law
Class of Worker	O
Can Read/Write	Yes
Home Owned/Rented	O
Home Value / Rent	6000
Radio Set	R
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa

1940

Clinton-County, Iowa

Head, age 41

Clinton-County, Iowa · implied b. ~1899 — 3 household members

Surname	Peterson
Given Name	Peter H.
Relationship to Head	Head
Sex	M
Color / Race	White
Age	41
Marital Status	Married
Birthplace	Iowa
1935 Residence (City)	Clinton City
1935 Residence (County)	Clinton
Occupation	Attorney at Law
Industry	Self
Class of Worker	E
Hours Worked	40
Income (1939)	1243
Highest Grade	Hs 4
1935 Residence	Same place
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa

Model Tree

Model Tree available

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

Show:

Gen 1 Parents confidence ≈ 0.92

Father

Herman Petersen

b. ~1871

Source father

● Household · direct · ~0.92

Mother

Ida Petersen

b. ~1876

Source mother

● Household · direct · ~0.92

This person

Anchor record

Peter Peterson

Head · 1940 · age 41 · b. ~1899 · 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 — Clinton-County, Iowa Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-01150-00170)

Line	Name	Age	Relation	Occupation	Birthplace
1	Donald Mcpherson	41	Head	Post Master	Iowa
2	Martha Mcpherson	40	Wife	—	Nebraska
3	Marjorie Mcpherson	18	Daughter	—	Iowa
4	David Mcpherson	16	Son	—	Iowa
5	Wrong Information. Mother + 5 In House. Mcpherson	None	—	—	—
6	Lottie H. Arp	73	Head	—	Iowa
7	Adolph V. Arp	78	Husband	—	Iowa
8	Nellie Miller	57	Lodger	—	Iowa
9	Ventura Bardo	41	Head	Teacher	Iowa
10	Alma S. Bardo	39	Wife	—	Iowa
11	Gus Kromer	67	Head	Salesman	Germany
12	Katherine Kromer	64	Wife	—	Germany
13	Charles Long	40	Head	Commercial	Iowa
14	Charlotte Long	37	Wife	—	Iowa
15	Theodore Long	14	Son	—	Iowa
16	Gloria Long	11	Daughter	—	Iowa
17	Ethel C. Price	44	Head	Engineer	New York
18	Eleanor R. Price	34	Wife	—	Iowa
19	Peter H. Peterson THIS PERSON	41	Head	Attorney At Law	Iowa
20	Irene M. Peterson	40	Wife	—	Iowa
21	Charles H. Peterson	10	Son	—	Iowa
22	Gus Hingst	32	Head	Retail Merchant	Iowa
23	Alice Hingst	32	Wife	—	Iowa
24	Joan Hingst	8	Daughter	—	Iowa
25	Jane Ann Hingst	3	Daughter	—	Iowa
26	Gus Anderson	57	Head	Road Master	Denmark
27	Anna Anderson	56	Wife	—	Iowa
28	James Hess	76	Head	—	Iowa
29	Bessie Hess	39	Daughter	—	Iowa
30	John Sullivan	67	Head	—	Michigan
31	Lillian Sullivan	13	Daughter	—	Iowa
32	Elizabeth Pringle	78	Head	—	Illinois
33	William Hammond	35	Head	Farmer	Iowa
34	Blanche Hammond	31	Wife	—	Iowa
35	Mildred C. Hammond	18	Daughter	—	Iowa
36	Charles Hammond	9	Son	—	Iowa
37	David Ceder	70	Head	Tailor	Iowa
38	Harry O'Dell	50	Head	Coal Shoveler	Iowa
39	Harry Payne	43	Head	Trucker	Oklahoma
40	Liza Payne	38	Wife	—	Iowa

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Pedigree Summary

Peter

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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