Helen Smith — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Marshall-County, South Dakota

Our Model Tree links this Helen Smith across the 1920, 1930 and 1940 US Censuses in Marshall-County, South Dakota (XGBoost, ~Confirmed) — first a spouse (b.~1893), then head of a 4-person household.

Age 47 b. ~1893 Female Spouse Born: Minnesota Married

1940 Census Record Details

Census Year	1940
Location	Marshall-County, South Dakota
Surname	Smith
Given Name	Helen M
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	47
Marital Status	Married
Birthplace	Minnesota
1935 Residence (City)	Langford town
1935 Residence (County)	Marshall
Additional Details
Occupation	Seamstress
Industry	at home
Class of Worker	OA
Income (1939)	0
Highest Grade	No 3
1935 Residence	Same place
Birth State	Minnesota
Birth Country	United States
Birthplace (normalized)	minnesota
Occupation	Seamstress
Township / Ward	Langford Town
Est. Birth Year	~1893

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 Helen	Age	Birth yr
Virginia Smith	Daughter	—	17	~1923
Seth Smith	Head	—	50	~1890
Dale Smith	Son	—	20	~1920
Helen Smith	Spouse	—	47	~1893

Census Appearances

1920

Marshall, South …

Spouse, age 28

Marshall, South Dakota · implied b. ~1892 — 5 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Smith
Given Name	Helen
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	28
Marital Status	Married
Birthplace	Minnesota
Father's Birthplace	Germany
Mother's Birthplace	Germany
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Mother Tongue	German
Birth State	Minnesota
Birth Country	United States
Birthplace (normalized)	minnesota

1930

Marshall, South …

Spouse, age 37

Marshall, South Dakota · implied b. ~1893 — 6 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Smith
Given Name	Helma A
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	37
Marital Status	Married
Birthplace	Minnesota
Age at First Marriage	19
Father's Birthplace	Germany
Mother's Birthplace	Germany
Can Read/Write	Yes
Birth State	Minnesota
Birth Country	United States
Birthplace (normalized)	minnesota

1940

Marshall-County, South …

Spouse, age 47

Marshall-County, South Dakota · implied b. ~1893 — 4 household members

Surname	Smith
Given Name	Helen M
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	47
Marital Status	Married
Birthplace	Minnesota
1935 Residence (City)	Langford town
1935 Residence (County)	Marshall
Occupation	Seamstress
Industry	at home
Class of Worker	OA
Income (1939)	0
Highest Grade	No 3
1935 Residence	Same place
Birth State	Minnesota
Birth Country	United States
Birthplace (normalized)	minnesota

Model Tree

Linked across censuses

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

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This person

Anchor record

Helen Smith

Spouse · 1940 · age 47 · b. ~1893 · South Dakota

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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 — Marshall-County, South Dakota Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-03861-01005)

Line	Name	Age	Relation	Occupation	Birthplace
1	Martin A Halland	43	Son	Mechanic Auto	So Dak
2	Cornie N Halland	24	Son	Auto Mechanic	So Dak
3	Seth M Smith	50	Head	Common Laborer	Kentucky
4	Helen M Smith THIS PERSON	47	Wife	Seamstress	Minnesota
5	Dale W Smith	20	Son	Service Station	So Dak
6	Virginia M Smith	17	Daughter	—	So Dak
7	Frank J Peterson	29	Head	Barber Shop	So Dak
8	Harriet C Peterson	32	Wife	—	So Dak
9	Bruce A Peterson	0	Son	—	So Dak
10	Jerome K Peterson	22	Brother	Grain Elevator	So Dak
11	Juliet Clark	73	Head	—	Iowa
12	Mabel O Sullivan	17	Granddaughter	House Work	So Dak
13	Ruth E Sullivan	11	Granddaughter	—	So Dak
14	Annette G Sullivan	9	Granddaughter	—	So Dak
15	Peter Knutson	65	Head	Common Laborer	Illinois
16	Emma Knutson	62	Wife	—	Wisconsin
17	Eugene L Knutson	16	Son	—	So Dak
18	Laura L Henry	50	Head	—	So Dak
19	Helen L Henry	26	Daughter	House Keeping	So Dak
20	Edith A Henry	24	Daughter	Maid	So Dak
21	Tyler O Henry	22	Son	Common Laborer	So Dak
22	Gwendolin O Henry	18	Daughter	—	So Dak
23	Dean O Henry	16	Son	—	So Dak
24	Darlene J Henry	14	Daughter	—	So Dak
25	Matilda Vernun	83	Head	—	Illinois
26	Bert Best	43	Son	Common	Iowa
27	Lewis C Nelson	83	Head	—	Norway
28	Ellen Nelson	69	Wife	—	Norway
29	Margaret Anderson	34	Head	—	So Dak
30	Blair P Anderson	15	Son	—	So Dak
31	Luther D Anderson	13	Son	—	So Dak
32	Bernice B Anderson	11	Daughter	—	So Dak
33	Doris R Anderson	9	Daughter	—	So Dak
34	Marilyn Anderson	5	Daughter	—	So Dak
35	Jerry L Anderson	3	Son	—	So Dak
36	James A Anderson	2	Son	—	So Dak
37	John Morten Anderson	0	Son	—	So Dak
38	Clarence Oser	36	Head	Common Laborer	So Dak
39	Margaret H Oser	23	Wife	—	So Dak
40	Florance D Oser	3	Daughter	—	So Dak

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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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