Harold Nelson — 1940 US Census Record

Model Tree available

1940 United States Federal Census · Clinton-County, Iowa

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

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

1940 Census Record Details

Census Year	1940
Location	Clinton-County, Iowa
Surname	Nelson
Given Name	Harold H.
Relationship to Head	Head
Sex	M
Color / Race	White
Age	29
Marital Status	Married
Birthplace	Wisconsin
1935 Residence (City)	Clinton City
1935 Residence (County)	Clinton
Additional Details
Occupation	Mechanic
Industry	Sugar Refinery
Class of Worker	PW
Hours Worked	40
Income (1939)	1250
Highest Grade	No 7
1935 Residence	Same Place
Birth State	Wisconsin
Birth Country	United States
Birthplace (normalized)	wisconsin
Occupation	Mechanic
Township / Ward	Clinton City
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 Harold	Age	Birth yr
Harold Nelson	Head	—	29	~1911
Richard Nelson	Son	—	3	~1937
Harold Nelson	Son	—	5	~1935
Helen Nelson	Spouse	—	25	~1915

Census Appearances

1920

Clinton, Iowa

Son, age 9

Clinton, Iowa · implied b. ~1911 — 9 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Nelsen
Given Name	Harold N
Relationship to Head	Son
Sex	M
Color / Race	White
Age	9
Marital Status	Single
Birthplace	Wisconsin
Father's Birthplace	Denmark
Mother's Birthplace	Wisconsin
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Birth State	Wisconsin
Birth Country	United States
Birthplace (normalized)	wisconsin

1930

Clinton, Iowa

Son, age 19

Clinton, Iowa · implied b. ~1911 — 8 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Nelson
Given Name	Harold N.
Relationship to Head	Son
Sex	M
Color / Race	White
Age	19
Marital Status	Single
Birthplace	Wisconsin
Father's Birthplace	Denmark
Mother's Birthplace	Wisconsin
Occupation	Laborer
Industry	Corn Products
Class of Worker	W
Can Read/Write	Yes
Birth State	Wisconsin
Birth Country	United States
Birthplace (normalized)	wisconsin

1940

Clinton-County, Iowa

Head, age 29

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

Surname	Nelson
Given Name	Harold H.
Relationship to Head	Head
Sex	M
Color / Race	White
Age	29
Marital Status	Married
Birthplace	Wisconsin
1935 Residence (City)	Clinton City
1935 Residence (County)	Clinton
Occupation	Mechanic
Industry	Sugar Refinery
Class of Worker	PW
Hours Worked	40
Income (1939)	1250
Highest Grade	No 7
1935 Residence	Same Place
Birth State	Wisconsin
Birth Country	United States
Birthplace (normalized)	wisconsin

Model Tree

Model Tree available

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

Show:

Gen 1 Parents confidence ≈ 0.92

Father

Nels Nelsen

b. ~1880

Source father

● Household · direct · ~0.92

Mother

Hattie Nelsen

b. ~1883

Source mother

● Household · direct · ~0.92

This person

Anchor record

Harold Nelson

Head · 1940 · age 29 · b. ~1911 · 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

39 people indexed on this census page (nara:1940:m-t0627-01150-00632)

Line	Name	Age	Relation	Occupation	Birthplace
41	Helen M. Proulx	16	Wife	—	Iowa
42	Larry Proulx	0	Son	—	Iowa
43	Plato D. Mcgregor	53	Head	Laborer	Germany
44	Christine Mcgregor	78	Mother	—	Germany
45	John Mcgregor	50	Son	Fireman	Iowa
46	Albert Mcgregor	45	Son	Engine Cleaner	Iowa
47	James Mcgregor	40	Son	—	Iowa
48	Howard M. Parker	28	Head	Laborer	Iowa
49	Alice A. Parker	25	Wife	—	Iowa
50	Janet Rae Parker	5	Daughter	—	Iowa
51	Sandra Kay Parker	1	Daughter	—	Iowa
52	John M. Gideon	66	Head	Owner	Iowa
53	Della Irene Gideon	61	Wife	—	Germany
54	John M. Bargholtz	68	Head	Caretaker	Germany
55	Doretta Bargholtz	40	Daughter	Bookkeeper	Iowa
56	Frank Miller	44	Head	Stenographer	Iowa
57	Ruby Miller	45	Wife	Laborer	Iowa
58	Earl Miller	24	Son	—	Iowa
59	Ardelle Miller	22	Daughter	Parts Clerk	Iowa
60	Robert Miller	16	Son	Bookkeeper	Iowa
61	George E. Healens	60	Head	Painter	England
62	Elizabeth Healens	59	Wife	—	Iowa
63	Marion Healens	23	Daughter	Floor Lady	Iowa
64	Chester L. Parchen	50	Head	Greaser	Illinois
65	Lettie Parchen	51	Wife	—	Illinois
66	Gilbert F. Montz	33	Head	Laborer	Iowa
67	Catherine Montz	35	Wife	—	Iowa
68	Joan Montz	8	Daughter	—	Iowa
69	Eugene Montz	5	Son	—	Iowa
70	John P. Jordan	74	Father-in-law	—	Germany
71	Milford Harridan	50	Head	Matron	Iowa
72	Robert Harridan	16	Son	Caddy	Iowa
73	Harold H. Nelson THIS PERSON	29	Head	Mechanic	Wisconsin
74	Helen L. Nelson	25	Wife	—	Iowa
75	Harold Jr. Nelson	5	Son	—	Iowa
76	Richard Nelson	3	Son	—	Iowa
77	Edward Lucke	69	Head	Signalman	Iowa
78	Clarence Ytsma	31	Head	Electrician Helper	Iowa
79	Ida V. Ytsma	34	Wife	—	Illinois

Search for Harold Nelson

All Harold Nelson Census Records Discover Nelson Family Tree

Pedigree Summary

Harold

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)

Report inaccurate data