Agnes Clark — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Porter-County, Indiana

Our Model Tree links this Agnes Clark across the 1920, 1930 and 1940 US Censuses in Porter-County, Indiana (XGBoost, ~Confirmed) — first a spouse (b.~1897), then head of a 4-person household.

Age 43 b. ~1897 Female Spouse Born: Illinois Married

1940 Census Record Details

Census Year	1940
Location	Porter-County, Indiana
Surname	Clark
Given Name	Agnes
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	43
Marital Status	Married
Birthplace	Illinois
1935 Residence (City)	Center Township
1935 Residence (County)	Porter
Additional Details
Highest Grade	No 6
1935 Residence	Same place
Birth State	Illinois
Birth Country	United States
Birthplace (normalized)	illinois
Township / Ward	Center Township
Est. Birth Year	~1897

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 Agnes	Age	Birth yr
Helen Clark	Daughter	—	16	~1924
Christ Carpenter	Other	—	76	~1864
Agnes Clark	Spouse	—	43	~1897
Harvey Clark	Head	—	45	~1895

Census Appearances

1920

Porter, Indiana

Spouse, age 24

Porter, Indiana · implied b. ~1896 — 2 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Clark
Given Name	Agnes
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	24
Marital Status	Married
Birthplace	Illinois
Father's Birthplace	Illinois
Mother's Birthplace	Illinois
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Birth State	Illinois
Birth Country	United States
Birthplace (normalized)	illinois

1930

Porter, Indiana

Spouse, age 34

Porter, Indiana · implied b. ~1896 — 3 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Clark
Given Name	Agnes H.
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	34
Marital Status	Married
Birthplace	Illinois
Age at First Marriage	20
Father's Birthplace	Germany
Mother's Birthplace	Germany
Can Read/Write	Yes
Birth State	Illinois
Birth Country	United States
Birthplace (normalized)	illinois

1940

Porter-County, Indiana

Spouse, age 43

Porter-County, Indiana · implied b. ~1897 — 4 household members

Surname	Clark
Given Name	Agnes
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	43
Marital Status	Married
Birthplace	Illinois
1935 Residence (City)	Center Township
1935 Residence (County)	Porter
Highest Grade	No 6
1935 Residence	Same place
Birth State	Illinois
Birth Country	United States
Birthplace (normalized)	illinois

Model Tree

Linked across censuses

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

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This person

Anchor record

Agnes Clark

Spouse · 1940 · age 43 · b. ~1897 · 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-t0627-01086-00340)

Line	Name	Age	Relation	Occupation	Birthplace
41	John E Schau	45	Head	Farmer	Indiana
42	Ada Schau	35	Wife	—	Indiana
43	Jerry Mckay	35	Head	Machinist	Illinois
44	Ruby Mckay	26	Wife	—	Indiana
45	Herbert Mckay	4	Son	—	Indiana
46	Judith E Mckay	2	Daughter	—	Indiana
47	Arthur Foster	79	Lodger	—	England
48	Clyde Schau	32	Head	Machinist	Indiana
49	Pearl Schau	31	Wife	—	Indiana
50	Betty Ann Schau	10	Daughter	—	Indiana
51	Raymond Schau	9	Son	—	Indiana
52	Charles Schau	8	Son	—	Indiana
53	Phyllis Jean Schau	5	Daughter	—	Indiana
54	Merrill Schau	4	Son	—	Indiana
55	Ronald Schau	2	Son	—	Indiana
56	Harry A Determan	56	Head	—	Missouri
57	Grace Determan	47	Wife	—	Kansas
58	Margaret Determan	20	Daughter	Salesgirl	Illinois
59	Charles Oyler	33	Head	Stock Buyer	Kentucky
60	Alma M Oyler	26	Wife	—	Indiana
61	Charles C Jr Oyler	6	Son	—	Indiana
62	Katherine Ann Oyler	4	Daughter	—	Indiana
63	Sarah Auehhammer	50	Servant	Servant	Illinois
64	Harvey Clark	45	Head	Grinder	Illinois
65	Agnes Clark THIS PERSON	43	Wife	—	Illinois
66	Helen Clark	16	Daughter	—	Illinois
67	Christ Carpenter	76	Lodger	—	Germany
68	Howard J Chamber	50	Head	Mechanic	Illinois
69	Eva R Chamber	50	Wife	—	Illinois
70	Harold D Chamber	25	Head	Filterman	Indiana
71	Gladys Chamber	20	Wife	—	Indiana
72	Howard Alan Chamber	4	Son	—	Indiana
73	Harry Wood	32	Head	Grinder	Illinois
74	Arlene Wood	24	Wife	—	Illinois
75	Floyd Curtis Wood	7	Son	—	Illinois
76	Gerald Wood	5	Son	—	Illinois
77	Sandra Jean Wood	3	Daughter	—	Illinois
78	David Lee Wood	1	Son	—	Indiana
79	Wayne Foley	30	Head	Grinder	Illinois
80	Nelda Foley	25	Wife	—	Illinois

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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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