Bertha Peterson — 1940 US Census Record

Linked across censuses

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

Our Model Tree links this Bertha Peterson across the 1920, 1930 and 1940 US Censuses in Union-County, South Dakota (XGBoost, ~Confirmed) — first a spouse (b.~1876), then head of a 4-person household.

Age 64 b. ~1876 Female Spouse Born: Sweden Married

1940 Census Record Details

Census Year	1940
Location	Union-County, South Dakota
Surname	PETERSON
Given Name	BERTHA S.
Relationship to Head	WIFE
Sex	F
Color / Race	White
Age	64
Marital Status	Married
Birthplace	Sweden
1935 Residence (City)	Alcester township
1935 Residence (County)	Union
Naturalization Status	Naturalized
Additional Details
Class of Worker	0
Highest Grade	No 8
1935 Residence	Same place
Birth Country	Sweden
Birthplace (normalized)	sweden
Township / Ward	Alcester Township
Est. Birth Year	~1876

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 Bertha	Age	Birth yr
Bertha Peterson	Spouse	—	64	~1876
Peter Peterson	Head	—	79	~1861
Carl Peterson	Son	—	31	~1909
Albert Peterson	Other	—	65	~1875

Census Appearances

1920

Union, South …

Spouse, age 43

Union, South Dakota · implied b. ~1877 — 8 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Peterson
Given Name	Bertha S
Relationship to Head	wife
Sex	F
Color / Race	White
Age	43
Marital Status	Married
Birthplace	Sweden
Year of Immigration	1880
Naturalization Status	Naturalized
Father's Birthplace	Sweden
Mother's Birthplace	Sweden
Occupation	none
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Mother Tongue	Swedish
Birth Country	Sweden
Birthplace (normalized)	sweden

1930

Union, South …

Spouse, age 54

Union, South Dakota · implied b. ~1876 — 4 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Peterson
Given Name	Bertha S
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	54
Marital Status	Married
Birthplace	Sweden
Naturalization Status	Naturalized
Year of Immigration	1886
Age at First Marriage	21
Father's Birthplace	Sweden
Mother's Birthplace	Sweden
Can Read/Write	Yes
Mother Tongue	Swedish
Birth Country	Sweden
Birthplace (normalized)	sweden

1940

Union-County, South …

Spouse, age 64

Union-County, South Dakota · implied b. ~1876 — 4 household members

Surname	PETERSON
Given Name	BERTHA S.
Relationship to Head	WIFE
Sex	F
Color / Race	White
Age	64
Marital Status	Married
Birthplace	Sweden
1935 Residence (City)	Alcester township
1935 Residence (County)	Union
Naturalization Status	Naturalized
Class of Worker	0
Highest Grade	No 8
1935 Residence	Same place
Birth Country	Sweden
Birthplace (normalized)	sweden

Model Tree

Linked across censuses

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

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This person

Anchor record

Bertha Peterson

Spouse · 1940 · age 64 · b. ~1876 · 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 — Union-County, South Dakota Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-03869-00029)

Line	Name	Age	Relation	Occupation	Birthplace
1	Wilma Sternquist	19	Daughter	—	South Dakota
2	Orland Sternquist	18	SON	Farming	South Dakota
3	Arla Sternquist	15	Daughter	—	South Dakota
4	Vernon Swanson	32	HEAD	Farming	Iowa
5	Verna Swanson	22	WIFE	—	South Dakota
6	Arthur Swanson	3	SON	—	South Dakota
7	Ramon Swanson	2	SON	—	South Dakota
8	Blenda Swanson	72	HEAD	—	Sweden
9	Esther Swanson	42	Daughter	—	Iowa
10	Anton L. Peterson	63	HEAD	Farmer	Sweden
11	Ertia Peterson	61	WIFE	—	South Dakota
12	Lewis Peterson	29	SON	Farmer	South Dakota
13	Vivian Peterson	23	Daughter-in-law	—	South Dakota
14	Gust Wilson	69	HEAD	Farmer	Sweden
15	Helma Wilson	62	Wife	—	Iowa
16	Harold (W) Wilson	26	SON	—	South Dakota
17	Bernard Wilson	24	SON	Farmer	South Dakota
18	Doris Wilson	21	Daughter	—	South Dakota
19	Peter John Peterson	79	HEAD	—	Sweden
20	Bertha S. Peterson THIS PERSON	64	WIFE	—	Sweden
21	Carl Willard Peterson	31	SON	Farmer	South Dakota
22	Albert Peterson	65	BROTHER	Farmer	Kansas
23	Winfield Johnson	39	HEAD	Farmer	Kansas
24	Amy Johnson	42	Wife	—	South Dakota
25	Helen Johnson	14	Daughter	—	South Dakota
26	Winfield, Jr. Johnson	9	SON	—	South Dakota
27	Roger Johnson	7	SON	—	South Dakota
28	Dean Johnson	5	SON	—	South Dakota
29	Albert Carpenter	51	HEAD	Farmer	South Dakota
30	Ester Carpenter	46	wife	—	South Dakota
31	Gordon Carpenter	23	SON	Farming	South Dakota
32	Clifton Waddell	30	HEAD	Farmer	Nebraska
33	Lois Waddell	23	wife	—	South Dakota
34	Karen Joy Waddell	0	Daughter	—	South Dakota
35	Clarence Carlson	39	HEAD	Farmer	Illinois
36	Gertrude Carlson	39	Wife	—	Illinois
37	Jean Carlson	13	Daughter	—	South Dakota
38	Ruth Carlson	11	Daughter	—	South Dakota
39	Rodney Carlson	8	SON	—	South Dakota
40	Robert Carlson	2	SON	—	South Dakota

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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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