Margaret Mahoney — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Napa-County, California

Our Model Tree links this Margaret Mahoney across the 1920, 1930 and 1940 US Censuses in Napa-County, California (XGBoost, ~Confirmed) — first a spouse (b.~1877), then head of a 3-person household.

Age 63 b. ~1877 Female Spouse Born: California Married

1940 Census Record Details

Census Year	1940
Location	Napa-County, California
Surname	Mahoney
Given Name	Margaret
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	63
Marital Status	Married
Birthplace	California
1935 Residence (City)	Napa City
1935 Residence (County)	Napa
Additional Details
Income (1939)	0
Highest Grade	No 8
1935 Residence	Same house
Birth State	California
Birth Country	United States
Birthplace (normalized)	california
Township / Ward	Napa City
Est. Birth Year	~1877

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
Francis Mahoney	Head	—	65	~1875
Raymond Mahoney	Son	—	39	~1901
Margaret Mahoney	Spouse	—	63	~1877

Census Appearances

1920

Napa, California

Spouse, age 41

Napa, California · implied b. ~1879 — 3 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Mahoney
Given Name	Margaret
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	41
Marital Status	Married
Birthplace	California
Father's Birthplace	Ireland
Mother's Birthplace	Ireland
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Birth State	California
Birth Country	United States
Birthplace (normalized)	california

1930

Napa, California

Spouse, age 52

Napa, California · implied b. ~1878 — 3 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Mahoney
Given Name	Margaret
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	52
Marital Status	Married
Birthplace	California
Age at First Marriage	22
Father's Birthplace	Ireland
Mother's Birthplace	Ireland
Occupation	none
Can Read/Write	Yes
Birth State	California
Birth Country	United States
Birthplace (normalized)	california

1940

Napa-County, California

Spouse, age 63

Napa-County, California · implied b. ~1877 — 3 household members

Surname	Mahoney
Given Name	Margaret
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	63
Marital Status	Married
Birthplace	California
1935 Residence (City)	Napa City
1935 Residence (County)	Napa
Income (1939)	0
Highest Grade	No 8
1935 Residence	Same house
Birth State	California
Birth Country	United States
Birthplace (normalized)	california

Model Tree

Linked across censuses

Our Model Tree links Margaret Mahoney 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 Mahoney

Spouse · 1940 · age 63 · b. ~1877 · 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 — Napa-County, California Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-00269-00157)

Line	Name	Age	Relation	Occupation	Birthplace
1	Delores Wallis	19	daughter	—	Montana
2	Adaline Wallis	17	daughter	—	Montana
3	Lucille Wallis	16	daughter	—	Montana
4	Vernon Wallis	11	son	—	California
5	William Furman	35	Head	Hod Carrier	Missouri
6	Ione Furman	34	Wife	Machine Operator	Minnesota
7	Nellie Furman	16	daughter	—	Montana
8	Berniece Furman	13	daughter	—	California
9	Harry Furman	11	son	—	California
10	Francis Mahoney	65	Head	—	California
11	Margaret Mahoney THIS PERSON	63	Wife	—	California
12	Raymond Mahoney	39	son	Laborer	California
13	Aimee Davies	53	Head	Clerk	California
14	Edgar A. Davies	22	son	Graduate Manager	California
15	Marian Davies	16	daughter	—	California
16	Pearle Emma Davies	90	mother	—	Massachusetts
17	George Francis	62	Head	Editor	California
18	Madge Francis	60	Wife	—	California
19	Mattie Poffenberger	81	mother in law	—	Missouri
20	John D. Cochrane	54	Head	Auditor	Scotland
21	Mabel H. Cochrane	50	Wife	—	Missouri
22	Evangeline Cochrane	26	daughter	Dental Nurse	California
23	John Cochrane	23	son	Manager	California
24	Margaret Cochrane	12	daughter	—	California
25	Donald Cochrane	9	son	—	California
26	Edmund Dudley	27	boarder	Laborer	California
27	Edwin Bishop	21	boarder	Clerk	California
28	Robert Kroplin	32	roomer	Florist	California
29	Myrtle Kime	59	Head	Teacher	Kansas
30	Roy L. Patrick	38	Head	Teacher	Oregon
31	Phyllis Patrick	36	Wife	—	Oregon
32	Peggy Ann Patrick	13	daughter	—	Oregon
33	Mary Patrick	3	daughter	—	California
34	Peter Jenni	39	Head	Identification Deputy	California
35	Inez Jenni	37	Wife	Attendant	Massachusetts
36	Beverly Jenni	16	daughter	—	California
37	Dolores Jenni	15	daughter	—	Oregon
38	Mary Mackey	68	Head	—	California
39	Alma Mackey	42	daughter	Bank Clerk	California
40	Lorine Berges	30	boarder	Teacher	California

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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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