Peter Nelson — 1940 US Census Record

Model Tree available

1940 United States Federal Census · Shelby-County, Iowa

Our Model Tree links this Peter Nelson across the 1920, 1930 and 1940 US Censuses in Shelby-County, Iowa (XGBoost, ~Confirmed), with identified parents Mrs & Sena — first a head (b.~1911), then head of a 4-person household.

Age 29 b. ~1911 Male Head Born: Iowa Married

1940 Census Record Details

Census Year	1940
Location	Shelby-County, Iowa
Surname	Nelson
Given Name	Peter H.
Relationship to Head	Head
Sex	M
Color / Race	White
Age	29
Marital Status	Married
Birthplace	Iowa
1935 Residence (City)	Jackson Township
1935 Residence (County)	Shelby
Additional Details
Occupation	Farmer
Industry	Farm
Class of Worker	OA
Hours Worked	44
Income (1939)	1000
Highest Grade	H 3
1935 Residence	Iowa
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa
Occupation	Farmer
Township / Ward	Jackson Township
Est. Birth Year	~1911

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 Peter	Age	Birth yr
Jannith Nelson	Daughter	—	4	~1936
Peter Nelson	Head	—	29	~1911
Joyce Nelson	Son	—	5	~1935
Johanne Nelson	Spouse	—	25	~1915

Census Appearances

1920

Shelby, Iowa

Son, age 8

Shelby, Iowa · implied b. ~1912 — 9 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Nielsen
Given Name	Peter
Relationship to Head	Son
Sex	M
Color / Race	White
Age	8
Marital Status	Single
Birthplace	Iowa
Father's Birthplace	Iowa
Mother's Birthplace	Iowa
Mother Tongue	English
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa

1930

Shelby, Iowa

Son, age 19

Shelby, Iowa · implied b. ~1911 — 3 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Nelsen
Given Name	Peter H.
Relationship to Head	Son
Sex	M
Color / Race	White
Age	19
Marital Status	Single
Birthplace	Iowa
Father's Birthplace	Iowa
Mother's Birthplace	Iowa
Occupation	Farm Laborer
Industry	General Farm
Class of Worker	W
Can Read/Write	Yes
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa

1940

Shelby-County, Iowa

Head, age 29

Shelby-County, Iowa · implied b. ~1911 — 4 household members

Surname	Nelson
Given Name	Peter H.
Relationship to Head	Head
Sex	M
Color / Race	White
Age	29
Marital Status	Married
Birthplace	Iowa
1935 Residence (City)	Jackson Township
1935 Residence (County)	Shelby
Occupation	Farmer
Industry	Farm
Class of Worker	OA
Hours Worked	44
Income (1939)	1000
Highest Grade	H 3
1935 Residence	Iowa
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa

Model Tree

Model Tree available

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

Show:

Gen 1 Parents confidence ≈ 0.92

Mother

Mrs Nielsen

b. ~1878

Source mother

● Household · direct · ~0.92

Mother

Sena Nelsen

b. ~1878

Source mother

● Household · direct · ~0.92

This person

Anchor record

Peter Nelson

Head · 1940 · age 29 · b. ~1911 · 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 — Shelby-County, Iowa Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-01204-00300)

Line	Name	Age	Relation	Occupation	Birthplace
1	Peter H. Nelson THIS PERSON	29	Head	Farmer	Iowa
2	Johanne Nelson	25	Wife	—	Iowa
3	Joyce Gene Nelson	5	Son	—	Iowa
4	Jannith B. Nelson	4	Daughter	—	Iowa
5	John J. Q. Petersen	60	Head	Farmer	Iowa
6	Annie C. Petersen	54	Wife	—	Iowa
7	Chas T. Nelson	63	Boarder	—	Iowa
8	Nels Baldwin	44	Head	Farmer	Iowa
9	Anna Baldwin	43	Wife	—	Iowa
10	Vernett Baldwin	15	Son	—	Iowa
11	Ruth Baldwin	11	Daughter	—	Iowa
12	Goodell Baldwin	5	Son	—	Iowa
13	Martin Barron	47	Head	Farmer	Iowa
14	Irela Barron	47	Wife	—	Iowa
15	Edmond Barron	24	Son	Farm Labor	Iowa
16	Margie Barron	21	Daughter	—	Iowa
17	Hazel Barron	19	Daughter	—	Iowa
18	Ludwick Larson	34	Head	Farmer	Iowa
19	Elna Larson	33	Wife	—	Iowa
20	Anna Mae Larson	5	Daughter	—	Iowa
21	Donald Larson	3	Son	—	Iowa
22	Carol Larson	1	Daughter	—	Iowa
23	Metta Larson	43	Sister	—	Iowa
24	Leo Petersen	25	Head	Farmer	Iowa
25	Vivian Petersen	24	Wife	—	Iowa
26	Brodstein Mortensen	36	Head	Farmer	Iowa
27	Lenard Mortensen	32	Brother	Farmer	Iowa
28	Peter Mortensen	30	Brother	Farmer	Iowa
29	Robert Mortensen	14	Brother	—	Iowa
30	Chris Mortensen	62	Father	—	Iowa
31	Esther Mortensen	52	Wife	—	Iowa
32	Richard Neil Mortensen	4	Grandson	—	Iowa
33	Marius Christensen	45	Head	—	Denmark
34	Laura Christensen	52	Wife	—	Denmark
35	Edmond Christensen	23	Son	Carpenter	Iowa
36	Arnold Christensen	20	Son	Carpenter	Iowa
37	Herbert Christensen	16	Son	—	Iowa
38	Vernon R. Petersen	21	Head	Farm Labor	Iowa
39	Edith Petersen	20	Wife	—	Nebraska
40	Arthur Petersen	44	Head	Farmer	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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