Mary Alexander — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Columbia-County, Wisconsin

Our Model Tree links this Mary Alexander across the 1920, 1930 and 1940 US Censuses in Columbia-County, Wisconsin (XGBoost, ~Confirmed) — first a head (b.~1870), then head of a 2-person household.

Age 70 b. ~1870 Female Head Born: Wisconsin Widowed

1940 Census Record Details

Census Year	1940
Location	Columbia-County, Wisconsin
Surname	Alexander
Given Name	Mary A
Relationship to Head	Head
Sex	F
Color / Race	White
Age	70
Marital Status	Widowed
Birthplace	Wisconsin
1935 Residence (City)	Portage City
1935 Residence (County)	Columbia
Additional Details
Income (1939)	0
Highest Grade	Yes 8
1935 Residence	Same House
Birth State	Wisconsin
Birth Country	United States
Birthplace (normalized)	wisconsin
Township / Ward	Portage City
Est. Birth Year	~1870

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.

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

Name	Relation to head	Relative to Mary	Age	Birth yr
Evelyn Alexander	Daughter	—	35	~1905
Mary Alexander	Head	—	70	~1870

Census Appearances

1920

Columbia, Wisconsin

Spouse, age 50

Columbia, Wisconsin · implied b. ~1870 — 6 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Alexander
Given Name	Mary
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	50
Marital Status	Married
Birthplace	Wisconsin
Father's Birthplace	Germany
Mother's Birthplace	Germany
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Birth State	Wisconsin
Birth Country	United States
Birthplace (normalized)	wisconsin

1930

Columbia, Wisconsin

Other, age 60

Columbia, Wisconsin · implied b. ~1870 — 5 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Alexander
Given Name	Mary G.
Relationship to Head	Wife-H
Sex	F
Color / Race	White
Age	60
Marital Status	Married
Birthplace	Wisconsin
Age at First Marriage	21
Father's Birthplace	Germany
Mother's Birthplace	Germany
Occupation	none
Can Read/Write	Yes
Birth State	Wisconsin
Birth Country	United States
Birthplace (normalized)	wisconsin

1940

Columbia-County, Wisconsin

Head, age 70

Columbia-County, Wisconsin · implied b. ~1870 — 2 household members

Surname	Alexander
Given Name	Mary A
Relationship to Head	Head
Sex	F
Color / Race	White
Age	70
Marital Status	Widowed
Birthplace	Wisconsin
1935 Residence (City)	Portage City
1935 Residence (County)	Columbia
Income (1939)	0
Highest Grade	Yes 8
1935 Residence	Same House
Birth State	Wisconsin
Birth Country	United States
Birthplace (normalized)	wisconsin

Model Tree

Linked across censuses

Our Model Tree links Mary Alexander 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 Alexander

Head · 1940 · age 70 · b. ~1870 · 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 — Columbia-County, Wisconsin Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-04466-00565)

Line	Name	Age	Relation	Occupation	Birthplace
1	Fern A Kranquah	45	wife	—	Wisconsin
2	Eugene D Kranquah	21	son	—	Wisconsin
3	Audrey A Kranquah	13	daughter	—	Wisconsin
4	Robert B. S. Alexander	48	Head	Yard Conductor	Wisconsin
5	Ethel S. Alexander	45	wife	—	Wisconsin
6	Ethel M Alexander	17	daughter	—	Wisconsin
7	Robert J. Alexander	15	son	—	Wisconsin
8	Claire L Alexander	13	son	—	Wisconsin
9	Mary A Alexander THIS PERSON	70	Head	—	Wisconsin
10	Evelyn M. Alexander	35	daughter	Office Manager	Wisconsin
11	Alvis J. Schmitt	27	Head	Laborer	Iowa
12	Elsie L Schmitt	24	wife	—	Wisconsin
13	Rose M Schmitt	5	daughter	—	Wisconsin
14	Lucy A Schmitt	0	daughter	—	Wisconsin
15	Myrtle M. Young	44	Head	—	Wisconsin
16	Kyle W. Young	24	son	Machine Operator	Wisconsin
17	Jack A Young	21	son	Machine Operator	Wisconsin
18	Lorraine Jermer	20	Lodger	Machine Operator	Iowa
19	Adolph G Bubolz	67	Head	—	Germany
20	Vadda Bubolz	61	wife	—	Germany
21	Walter G. Bubolz	21	son	—	Wisconsin
22	Martin Bubolz	19	son	—	Wisconsin
23	Merton H. Van Wormer	58	Head	Conductor	Wisconsin
24	Jennie B. Van Wormer	54	wife	—	Norway
25	Russell E. Van Wormer	21	son	—	Wisconsin
26	John A Van Wormer	15	son	—	Wisconsin
27	Dorothy J. Van Wormer	11	daughter	—	Wisconsin
28	Anna M. Davies	79	Head	—	Wisconsin
29	Frank B. Durick	56	son	Engineer	Wisconsin
30	Annabell H. Durick	39	daughter	—	Wisconsin
31	Martin J Winiecki	34	Head	—	Wisconsin
32	Marguerite M Winiecki	28	wife	—	Wisconsin
33	Ray C Hammond	50	Head	Caretaker	Wisconsin
34	Clarence J. Sommers	31	Head	Lock Tender	Wisconsin
35	Valrea J. Sommers	30	wife	—	Wisconsin
36	Henry M. Brown	36	Head	Machine Operator	Illinois
37	Alice M. Brown	34	wife	—	Wisconsin
38	Gerald W Brown	15	son	—	Wisconsin
39	Geraldine M Brown	12	daughter	—	Wisconsin
40	Alice V Brown	11	daughter	—	Wisconsin

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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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