Mary Lamb — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Hamilton-County, Indiana

Our Model Tree links this Mary Lamb across the 1920, 1930 and 1940 US Censuses in Hamilton-County, Indiana (XGBoost, ~Confirmed) — first a spouse (b.~1899), then head of a 4-person household.

Age 41 b. ~1899 Female Spouse Born: Indiana Married

1940 Census Record Details

Census Year	1940
Location	Hamilton-County, Indiana
Surname	Lamb
Given Name	Mary
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	41
Marital Status	Married
Birthplace	Indiana
1935 Residence (City)	Washington
1935 Residence (County)	Hamilton
Additional Details
Income (1939)	0
Highest Grade	8
1935 Residence	Same House
Birth State	Indiana
Birth Country	United States
Birthplace (normalized)	indiana
Township / Ward	Washington
Est. Birth Year	~1899

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 Mary	Age	Birth yr
Richard Lamb	Son	—	12	~1928
William Lamb	Head	—	44	~1896
Raymond Lamb	Son	—	16	~1924
Mary Lamb	Spouse	—	41	~1899

Census Appearances

1920

Daviess, Indiana

Spouse, age 23

Daviess, Indiana · implied b. ~1897 — 4 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Lamb
Given Name	Mary
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	23
Marital Status	Married
Birthplace	Indiana
Father's Birthplace	Indiana
Mother's Birthplace	Indiana
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Birth State	Indiana
Birth Country	United States
Birthplace (normalized)	indiana

1930

Daviess, Indiana

Spouse, age 34

Daviess, Indiana · implied b. ~1896 — 5 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Lamb
Given Name	Mary D
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	34
Marital Status	Married
Birthplace	Indiana
Age at First Marriage	19
Father's Birthplace	Indiana
Mother's Birthplace	Indiana
Can Read/Write	Yes
Home Owned/Rented	No
Birth State	Indiana
Birth Country	United States
Birthplace (normalized)	indiana

1940

Hamilton-County, Indiana

Spouse, age 41

Hamilton-County, Indiana · implied b. ~1899 — 4 household members

Surname	Lamb
Given Name	Mary
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	41
Marital Status	Married
Birthplace	Indiana
1935 Residence (City)	Washington
1935 Residence (County)	Hamilton
Income (1939)	0
Highest Grade	8
1935 Residence	Same House
Birth State	Indiana
Birth Country	United States
Birthplace (normalized)	indiana

Model Tree

Linked across censuses

Our Model Tree links Mary Lamb 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 Lamb

Spouse · 1940 · age 41 · b. ~1899 · 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 — Hamilton-County, Indiana Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-01050-00636)

Line	Name	Age	Relation	Occupation	Birthplace
41	Ruth Thompson	30	Wife	House Wife	Indiana
42	Charles Lee Thompson	10	Son	—	Indiana
43	Charlotte Ann Thompson	7	Daughter	—	Indiana
44	Frick Charles Thompson	20	Hired Hand	Farm Laborer	Indiana
45	Van H. Johnson	67	Head	Farmer	Indiana
46	Iva Johnson	67	Wife	—	Indiana
47	Russell Mckenzie	33	Head	Farm Laborer	Indiana
48	Pauline Mckenzie	31	Wife	—	Indiana
49	Max Mckenzie	14	Son	—	Indiana
50	Mary Lou Mckenzie	12	Daughter	—	Indiana
51	Sarah May Mckenzie	10	Daughter	—	Indiana
52	Elias Jr. Katterhenry	48	Head	Farm Manager	Indiana
53	Marcella Katterhenry	43	Wife	—	Indiana
54	William Lamb	44	Head	Farmer	Indiana
55	Mary Lamb THIS PERSON	41	Wife	—	Indiana
56	Raymond Lamb	16	Son	—	Indiana
57	Richard Lamb	12	Son	—	Indiana
58	Alva Myers	57	Head	Farmer	Indiana
59	Rala Myers	54	Wife	—	Indiana
60	Augusta Myers	24	Daughter	—	Indiana
61	Russell Myers	19	Son	—	Indiana
62	Donald Myers	16	Son	—	Indiana
63	Cyril Myers	13	Son	—	Indiana
64	John H. White	65	Hired Hand	Farm Laborer	Indiana
65	James W. Lynch	62	Head	Proprietor	Indiana
66	Isabel A. Lynch	58	Wife	—	Indiana
67	Gerald Smith	31	Head	Farmer	Indiana
68	Bernice Smith	31	Wife	—	Indiana
69	Geraldine Smith	11	Daughter	—	Indiana
70	Helen Irene Smith	8	Daughter	—	Indiana
71	Gerald Smith	7	Son	—	Indiana
72	Mary Elizabeth Smith	6	Daughter	—	Indiana
73	Frances Marie Smith	1	Daughter	—	Indiana
74	Mary E. Lamb	77	Mother-in-law	—	Indiana
75	William E. Hoffman	25	Head	Attendant	Indiana
76	Charles O. Stanbrough	76	Head	Farmer	Indiana
77	Clara Lucile Stanbrough	40	Daughter	—	Iowa
78	Mary Elizabeth Stanbrough	34	Daughter	—	Indiana
79	Donald E. Walker	30	Head	Farmer	Indiana
80	Marjorie Walker	26	Wife	—	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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