Mary Pierce — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Porter-County, Indiana

Our Model Tree links this Mary Pierce across the 1920, 1930 and 1940 US Censuses in Porter-County, Indiana (XGBoost, ~Confirmed) — first a head (b.~1865), then head of a 3-person household.

Age 75 b. ~1865 Female Head Born: Indiana Widowed

1940 Census Record Details

Census Year	1940
Location	Porter-County, Indiana
Surname	Pierce
Given Name	Mary A
Relationship to Head	Head
Sex	F
Color / Race	White
Age	75
Marital Status	Widowed
Birthplace	Indiana
1935 Residence (City)	Washington Township
1935 Residence (County)	Porter
Additional Details
Occupation	Housewife
Industry	Farm
Class of Worker	NP
Income (1939)	0
Highest Grade	No 8
1935 Residence	Same Place
Birth State	Indiana
Birth Country	United States
Birthplace (normalized)	indiana
Occupation	Housewife
Township / Ward	Washington Township
Est. Birth Year	~1865

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
Geneva Schneider	Daughter	—	57	~1883
Mary Pierce	Head	—	75	~1865
Harry Schneider	Other	—	59	~1881

Census Appearances

1920

Porter, Indiana

Spouse, age 53

Porter, Indiana · implied b. ~1867 — 2 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Pierce
Given Name	Mary
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	53
Marital Status	Married
Birthplace	Indiana
Father's Birthplace	Germany
Mother's Birthplace	Germany
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Birth State	Indiana
Birth Country	United States
Birthplace (normalized)	indiana

1930

Porter, Indiana

Other, age 65

Porter, Indiana · implied b. ~1865 — 2 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Pierce
Given Name	Mary A
Relationship to Head	Wife-H
Sex	F
Color / Race	White
Age	65
Marital Status	Married
Birthplace	Indiana
Father's Birthplace	Germany
Mother's Birthplace	Germany
Occupation	none
Can Read/Write	Yes
Birth State	Indiana
Birth Country	United States
Birthplace (normalized)	indiana

1940

Porter-County, Indiana

Head, age 75

Porter-County, Indiana · implied b. ~1865 — 3 household members

Surname	Pierce
Given Name	Mary A
Relationship to Head	Head
Sex	F
Color / Race	White
Age	75
Marital Status	Widowed
Birthplace	Indiana
1935 Residence (City)	Washington Township
1935 Residence (County)	Porter
Occupation	Housewife
Industry	Farm
Class of Worker	NP
Income (1939)	0
Highest Grade	No 8
1935 Residence	Same Place
Birth State	Indiana
Birth Country	United States
Birthplace (normalized)	indiana

Model Tree

Linked across censuses

Our Model Tree links Mary Pierce 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 Pierce

Head · 1940 · age 75 · b. ~1865 · Indiana

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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 — Porter-County, Indiana Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-01086-00696)

Line	Name	Age	Relation	Occupation	Birthplace
1	Helen R Stambaugh	39	Wife	Housewife	Chicago
2	Mark W Mallon	18	Step Son	—	Chicago
3	Anthony J Huber	18	Head	Gardener	Illinois
4	Florence Huber	20	Wife	Maid	Indiana
5	Dale M Hazelton	27	Head	Butler	Ohio
6	Lillian A Hazelton	21	Wife	Cook	Indiana
7	Richard H Hazelton	1	Son	—	Indiana
8	Clyde E Bramlett	41	Head	Farm Hand	Tennessee
9	Lily May Bramlett	39	Wife	Housewife	Tennessee
10	Raymond Bramlett	20	Son	Farm Hand	Tennessee
11	Ralph Bramlett	19	Son	Farm Hand	Tennessee
12	Norene Bramlett	17	Daughter	—	Tennessee
13	Thomas Keel	76	Head	Truck Gardener	Indiana
14	Arthur G Conn	29	Head	Mechanic	Kansas
15	Jonathan W Conn	53	Father	Farmer	Kansas
16	Mae E Conn	48	Mother	House Work	Kansas
17	Billy Dean Conn	7	Son	—	Kansas
18	Mary Middle	35	Lodger	—	—
19	Harold E Yoder	31	Head	Farmer	Indiana
20	Sadie M Yoder	27	Wife	Housewife	Indiana
21	Samuel G Yoder	5	Son	—	Indiana
22	Carolyn J Yoder	2	Daughter	—	Indiana
23	Evelyn R Miller	15	Niece	—	Indiana
24	William H Maack	26	Head	Carpenter	Indiana
25	Ella Louise Maack	22	Wife	Housewife	Indiana
26	Wilma Jean Maack	1	Daughter	—	Indiana
27	Earl D Pierce	24	Head	Farm Hand	Indiana
28	Ella May Pierce	21	Wife	Beauty Operator	Indiana
29	Mary A Pierce THIS PERSON	75	Head	Housewife	Indiana
30	Geneva Schneider	57	Daughter	Teacher	Indiana
31	Harry J Schneider	59	Son-in-law	Cement Contractor	Indiana
32	William F Sievers	55	Head	Farmer	Indiana
33	Bertha P Sievers	52	Wife	Housewife	Indiana
34	Wilfred E Sievers	27	Son	Farmer'S Hand	Indiana
35	John R Sievers	20	Son	Farm Hand	Indiana
36	Harold Faucher	28	Lodger	Farm Hand	Illinois
37	Craig A Church	49	Head	Huckster/Farmer	Indiana
38	Frances L Church	45	Sister	House Keeper	Indiana
39	John Morgan	42	Head	Farmer	Indiana
40	Mary Morgan	40	Wife	Housewife	Indiana

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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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