Mary Nelson — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Bayfield-County, Wisconsin

Our Model Tree links this Mary Nelson across the 1920, 1930 and 1940 US Censuses in Bayfield-County, Wisconsin (XGBoost, ~Confirmed) — first a head (b.~1877), then head of a 3-person household.

Age 63 b. ~1877 Female Head Born: Finland Widowed

1940 Census Record Details

Census Year	1940
Location	Bayfield-County, Wisconsin
Surname	Nelson
Given Name	Mary
Relationship to Head	head
Sex	F
Color / Race	White
Age	63
Marital Status	Widowed
Birthplace	Finland
1935 Residence (City)	Eileen Township
1935 Residence (County)	Bayfield
Naturalization Status	Naturalized
Additional Details
Occupation	farmer
Industry	farm
Class of Worker	OA
Hours Worked	50
Income (1939)	0
Highest Grade	No 8
1935 Residence	Same place
Birth Country	Finland
Birthplace (normalized)	finland
Occupation	Farmer
Township / Ward	Eileen Township
Est. Birth Year	~1877

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.

3 people recorded at the same address in the 1940 census.

Name	Relation to head	Relative to Mary	Age	Birth yr
Mary Nelson	Head	—	63	~1877
Edwin Nelson	Son	—	40	~1900
Harry Nelson	Son	—	30	~1910

Census Appearances

1920

Bayfield, Wisconsin

Spouse, age 44

Bayfield, Wisconsin · implied b. ~1876 — 9 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Nelson
Given Name	Mary
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	44
Marital Status	Married
Birthplace	Finland
Year of Immigration	1897
Naturalization Status	First papers filed
Father's Birthplace	Finland
Mother's Birthplace	Finland
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Mother Tongue	Swedish
Birth Country	Finland
Birthplace (normalized)	finland

1930

Bayfield, Wisconsin

Spouse, age 53

Bayfield, Wisconsin · implied b. ~1877 — 4 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Nelson
Given Name	Mary
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	53
Marital Status	Married
Birthplace	Finland
Naturalization Status	Naturalized
Year of Immigration	1897
Age at First Marriage	28
Father's Birthplace	Finland
Mother's Birthplace	Finland
Occupation	Farmer
Industry	Dairy Farm
Class of Worker	OA
Can Read/Write	Yes
Mother Tongue	Swedish
Veteran	No
Birth Country	Finland
Birthplace (normalized)	finland

1940

Bayfield-County, Wisconsin

Head, age 63

Bayfield-County, Wisconsin · implied b. ~1877 — 3 household members

Surname	Nelson
Given Name	Mary
Relationship to Head	head
Sex	F
Color / Race	White
Age	63
Marital Status	Widowed
Birthplace	Finland
1935 Residence (City)	Eileen Township
1935 Residence (County)	Bayfield
Naturalization Status	Naturalized
Occupation	farmer
Industry	farm
Class of Worker	OA
Hours Worked	50
Income (1939)	0
Highest Grade	No 8
1935 Residence	Same place
Birth Country	Finland
Birthplace (normalized)	finland

Model Tree

Linked across censuses

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

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This person

Anchor record

Mary Nelson

Head · 1940 · age 63 · b. ~1877 · Wisconsin

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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 — Bayfield-County, Wisconsin Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-04458-00188)

Line	Name	Age	Relation	Occupation	Birthplace
41	Nellie Klein	47	wife	—	Wisconsin
42	Mary Nelson THIS PERSON	63	head	Farmer	Finland
43	Edwin Nelson	40	son	Laborer	Wisconsin
44	Harry Nelson	30	son	Laborer	Wisconsin
45	Joe Nelson	36	head	Farmer	Wisconsin
46	Irene Nelson	36	wife	—	N. Dakota
47	Joseph Nelson	10	son	—	Wisconsin
48	Robert Nelson	9	son	—	Wisconsin
49	Betty Ann Nelson	6	daughter	—	Wisconsin
50	Mary Lou Nelson	5	daughter	—	Wisconsin
51	Shirley Nelson	2	daughter	—	Wisconsin
52	John Mastell	55	head	Farmer	S. Dakota
53	Anna Mastell	52	wife	—	Russia
54	John Mastell	28	son	Laborer	S. Dakota
55	Donald Mastell	17	son	Laborer	Wisconsin
56	Robert Mastell	14	son	None	Wisconsin
57	Floyd Mastell	10	son	—	Wisconsin
58	Nels J. Peterson	63	head	None	Sweden
59	Ervin Yander	25	head	Farmer	Wisconsin
60	John Mithun	64	head	Carpenter	Minnesota
61	Mary Mithun	63	wife	—	Minnesota
62	Robert G. Mithun	21	son	Manager	Wisconsin
63	Solon Smith	57	head	Farmer	Minnesota
64	Anna Smith	51	wife	—	Wisconsin
65	George Kane	15	nephew	None	Wisconsin
66	Valentine Kuzniaki	61	head	Farmer	Poland
67	Josephine Kuzniaki	67	wife	—	Poland
68	Lena Gilles	56	head	Farmer	Wisconsin
69	Herman Gilles	24	son	Laborer	Wisconsin
70	Hugo Gilles	21	son	Laborer	Wisconsin
71	Kathrine Gilles	17	daughter	None	Wisconsin
72	Dorothy Gilles	13	daughter	—	Wisconsin
73	Frank Tkaczewski	46	head	Farmer	Wisconsin
74	Raymond Tkaczewski	44	brother	Mail Carrier	Wisconsin
75	Bessie Tkaczewski	37	sister	None	Wisconsin
76	John J. Kane	None	head	Farmer	Germany
77	Richard Achilles	63	head	Professor Emeritus	Minnesota
78	Florence Achilles	59	wife	—	Minnesota
79	Sever Johnson	40	head	Laborer	Wisconsin
80	Florence Johnson	28	wife	—	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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