Harold Thomas — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Dodge-County, Minnesota

Our Model Tree links this Harold Thomas across the 1920, 1930 and 1940 US Censuses in Dodge-County, Minnesota (XGBoost, ~Confirmed) — first a head (b.~1897), then head of a 5-person household.

Age 43 b. ~1897 Male Head Born: Iowa Married

1940 Census Record Details

Census Year	1940
Location	Dodge-County, Minnesota
Surname	Thomas
Given Name	Harold
Relationship to Head	Head
Sex	M
Color / Race	White
Age	43
Marital Status	Married
Birthplace	Iowa
1935 Residence (City)	Dodge Center
1935 Residence (County)	Dodge
Additional Details
Occupation	Doctor
Industry	Dental Surg.
Class of Worker	OA
Hours Worked	48
Highest Grade	C-8
1935 Residence	Same Place
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa
Occupation	Doctor
Township / Ward	Dodge Center
Est. Birth Year	~1897

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 Harold	Age	Birth yr
Hugh Thomas	Son	—	3	~1937
Harold Thomas	Son	—	8	~1932
Miriam Thomas	Daughter	—	5	~1935
Bertene Thomas	Spouse	—	34	~1906
Harold Thomas	Head	—	43	~1897

Census Appearances

1920

Dodge, Minnesota

Other, age 23

Dodge, Minnesota · implied b. ~1897 — 5 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Thomas
Given Name	Harold E.
Relationship to Head	Roomer
Sex	M
Color / Race	White
Age	23
Marital Status	Single
Birthplace	Iowa
Father's Birthplace	Illinois
Mother's Birthplace	Iowa
Occupation	Dentist
Industry	Own Office
Class of Worker	O.A.
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa

1930

Dodge, Minnesota

Other, age 33

Dodge, Minnesota · implied b. ~1897 — 4 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Thomas
Given Name	Harold E. Dr.
Relationship to Head	Roomer
Sex	M
Color / Race	White
Age	33
Marital Status	Single
Birthplace	Iowa
Father's Birthplace	Illinois
Mother's Birthplace	Iowa
Occupation	Dentist
Industry	Own Shop
Class of Worker	OA
Can Read/Write	Yes
Veteran	No
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa

1940

Dodge-County, Minnesota

Head, age 43

Dodge-County, Minnesota · implied b. ~1897 — 5 household members

Surname	Thomas
Given Name	Harold
Relationship to Head	Head
Sex	M
Color / Race	White
Age	43
Marital Status	Married
Birthplace	Iowa
1935 Residence (City)	Dodge Center
1935 Residence (County)	Dodge
Occupation	Doctor
Industry	Dental Surg.
Class of Worker	OA
Hours Worked	48
Highest Grade	C-8
1935 Residence	Same Place
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa

Model Tree

Linked across censuses

Our Model Tree links Harold Thomas across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.

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This person

Anchor record

Harold Thomas

Head · 1940 · age 43 · b. ~1897 · Minnesota

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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 — Dodge-County, Minnesota Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-01919-00123)

Line	Name	Age	Relation	Occupation	Birthplace
1	Virginia Florin	16	Daughter	—	Minnesota
2	Hattie R. Boeke	32	Head	House Cleaning	North Dakota
3	Lawrence Boeke	12	Son	—	Minnesota
4	Donald Boeke	11	Son	—	Minnesota
5	Coral E. Alguire	70	Head	Housewife	Minnesota
6	Roy Gould	39	Head	Prop.	Iowa
7	Laurena M. Gould	36	Wife	Housewife	Iowa
8	David Gould	11	Son	—	Minnesota
9	Donald Gould	10	Son	—	Minnesota
10	August Marquardt	84	Head	—	Germany
11	Amelia S. Marquardt	76	Wife	Housewife	Germany
12	Lizzie Marquardt	54	Daughter	—	Minnesota
13	Albert Dolder	39	Head	Prop.	Minnesota
14	Ruby Dolder	39	Wife	Housewife	Minnesota
15	Phyllis Dolder	8	Daughter	—	Minnesota
16	Donald Dolder	1	Son	—	Minnesota
17	Harold Thomas THIS PERSON	43	Head	Doctor	Iowa
18	Bertene S. Thomas	34	Wife	Housewife	Minnesota
19	Harold Thomas	8	Son	—	Minnesota
20	Miriam Thomas	5	Daughter	—	Minnesota
21	Hugh Douglas Thomas	3	Son	—	Minnesota
22	Henry Plaisier	64	Head	—	Germany
23	John W. Plaisier	31	Son	Laborer	Iowa
24	Carl E. Nicholas	36	Head	Barber	Minnesota
25	Valera L. Nicholas	40	Wife	Housewife	Minnesota
26	Robert Lewis Nicholas	11	Son	—	Minnesota
27	Paul Nicholas	9	Son	—	Minnesota
28	Fred O. Weeks	50	Head	Carpenter	Minnesota
29	Clara Weeks	50	Wife	Housewife	Minnesota
30	Anita Weeks	13	Daughter	—	Minnesota
31	John Swendiman	61	Lodger	Lawyer	Minnesota
32	Mary Rounseville	84	Lodger	—	Illinois
33	Edward Bigelow	39	Head	Section Hand	Minnesota
34	Mildred Bigelow	28	Wife	Housewife	Minnesota
35	Ronald Bigelow	6	Son	—	North Dakota
36	Katharine Bigelow	2	Daughter	—	Minnesota
37	Gilbert O. Hester	51	Head	Insurance Agent / Auctioneer	Iowa
38	Esther Hester	48	Wife	Housewife	Iowa
39	Herman Peterson	42	Head	Teacher	Minnesota
40	Eileen P. Peterson	36	Wife	Housewife	Minnesota

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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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