Margaret Hamilton — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Los-Angeles-County, California

Our Model Tree links this Margaret Hamilton across the 1920, 1930 and 1940 US Censuses in Los-Angeles-County, California (XGBoost, ~Confirmed) — first a spouse (b.~1860), then head of a 3-person household.

Age 80 b. ~1860 Female Spouse Born: Ohio Married

1940 Census Record Details

Census Year	1940
Location	Los-Angeles-County, California
Surname	Hamilton
Given Name	Margaret J.
Relationship to Head	wife
Sex	F
Color / Race	White
Age	80
Marital Status	Married
Birthplace	Ohio
1935 Residence (City)	Pasadena
1935 Residence (County)	Los Angeles
Additional Details
Income (1939)	0
Highest Grade	H-4
1935 Residence	Same house
Birth State	Ohio
Birth Country	United States
Birthplace (normalized)	ohio
Township / Ward	Pasadena
Est. Birth Year	~1860

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 Margaret	Age	Birth yr
John Hamilton	Son	—	43	~1897
John Hamilton	Head	—	85	~1855
Margaret Hamilton	Spouse	—	80	~1860

Census Appearances

1920

Los Angeles, …

Spouse, age 60

Los Angeles, California · implied b. ~1860 — 4 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Hamilton
Given Name	Margaret M.
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	60
Marital Status	Married
Birthplace	Ohio
Father's Birthplace	Ohio
Mother's Birthplace	Maryland
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Birth State	Ohio
Birth Country	United States
Birthplace (normalized)	ohio

1930

Los Angeles, …

Spouse, age 70

Los Angeles, California · implied b. ~1860 — 3 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	HAMILTON
Given Name	MARGARET G
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	70
Marital Status	Married
Birthplace	Ohio
Age at First Marriage	33
Father's Birthplace	Ohio
Mother's Birthplace	Maryland
Can Read/Write	Yes
Birth State	Ohio
Birth Country	United States
Birthplace (normalized)	ohio

1940

Los-Angeles-County, California

Spouse, age 80

Los-Angeles-County, California · implied b. ~1860 — 3 household members

Surname	Hamilton
Given Name	Margaret J.
Relationship to Head	wife
Sex	F
Color / Race	White
Age	80
Marital Status	Married
Birthplace	Ohio
1935 Residence (City)	Pasadena
1935 Residence (County)	Los Angeles
Income (1939)	0
Highest Grade	H-4
1935 Residence	Same house
Birth State	Ohio
Birth Country	United States
Birthplace (normalized)	ohio

Model Tree

Linked across censuses

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

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This person

Anchor record

Margaret Hamilton

Spouse · 1940 · age 80 · b. ~1860 · California

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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 — Los-Angeles-County, California Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-00242-00305)

Line	Name	Age	Relation	Occupation	Birthplace
41	Nan Mugridge	65	wife	—	Ohio
42	A. Wells Morton	66	Head	—	Maryland
43	Edwin H. Mcmillan	68	Head	Physician	Maryland
44	Marie M. Mcmillan	70	wife	—	New York
45	Lillie Wright	66	Head	—	California
46	Donald R. Wright	33	Son	Attorney	California
47	James M. Wright	29	Son	Wood Beater	California
48	Fred A. Braley	85	Head	—	Vermont
49	John La Spada	50	Son-in-law	Carpet Salesman	California
50	Jessie La Spada	44	Daughter	—	Illinois
51	John C. Braley	77	Brother	—	Vermont
52	Agnes D. Noe	70	Head	—	Connecticut
53	Mary Noe	37	Daughter	Bank Clerk	Illinois
54	Clyde Street	52	Head	—	Wisconsin
55	Lottie Jane Street	55	wife	—	Wisconsin
56	Elizabeth Hambaugh	41	Head	—	Colorado
57	M. Patricia Hambaugh	16	Daughter	—	Texas
58	Stanley R. Jones	52	Head	Chauffeur	Kentucky
59	Juanita Jones	42	wife	—	Missouri
60	Alice Laurence	53	Lodger	—	Illinois
61	Mae Douglas	31	Lodger	Waitress	California
62	Vivian Brunson	23	Lodger	Retail Notion	California
63	Ernest Pfeuffer	70	Head	—	Iowa
64	Sophie Pfeuffer	68	wife	—	Iowa
65	Mary Curlee Park	69	Head	—	Mississippi
66	Violet Willis	33	Lodger	Stenographer	Rhode Island
67	Maxwell T. Smith	65	Head	—	Maine
68	Arthur P. Smith	55	Partner	—	Maine
69	Martha Howe	68	Head	—	Illinois
70	James R. Clarke	76	Head	—	England
71	Rebecca Clarke	49	wife	—	England
72	Edwin R. Pearson	47	Head	—	Sweden
73	Sophie Pearson	77	wife	Cateress	Finland
74	John J. Hamilton	85	Head	Author	Pennsylvania
75	Margaret J. Hamilton THIS PERSON	80	wife	—	Ohio
76	John J. Jr. Hamilton	43	Son	Attorney	Iowa
77	Margaret M. Macalister	57	Head	Trained Nurse	Canada-English
78	Marian W. Macalister	51	Sister	—	Canada-English
79	Jennie E. Martin	82	Head	—	New York
80	Evelyn H. Fisher	61	Head	Secretary	Canada-English

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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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