Mary Boyle — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Delaware-County, Pennsylvania

Our Model Tree links this Mary Boyle across the 1920, 1930 and 1940 US Censuses in Delaware-County, Pennsylvania (XGBoost, ~Confirmed) — first a head (b.~1891), then head of a 3-person household.

Age 49 b. ~1891 Female Head Born: Delaware Widowed

1940 Census Record Details

Census Year	1940
Location	Delaware-County, Pennsylvania
Surname	BOYLE
Given Name	Mary
Relationship to Head	Head
Sex	F
Color / Race	White
Age	49
Marital Status	Widowed
Birthplace	Delaware
1935 Residence (City)	CHESTER CITY
1935 Residence (County)	DELAWARE
Additional Details
Class of Worker	0
Hours Worked	0
Highest Grade	No 8
1935 Residence	Same Place
Birth State	Delaware
Birth Country	United States
Birthplace (normalized)	delaware
Township / Ward	Chester City
Est. Birth Year	~1891

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
Mary Boyle	Head	—	49	~1891
James Boyle	Son	—	27	~1913
John Boyle	Son	—	21	~1919

Census Appearances

1920

Delaware, Pennsylvania

Spouse, age 32

Delaware, Pennsylvania · implied b. ~1888 — 4 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Boyle
Given Name	Mary
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	32
Marital Status	Married
Birthplace	Delaware
Father's Birthplace	Delaware
Mother's Birthplace	Delaware
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Birth State	Delaware
Birth Country	United States
Birthplace (normalized)	delaware

1930

Delaware, Pennsylvania

Spouse, age 41

Delaware, Pennsylvania · implied b. ~1889 — 9 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Boyle
Given Name	Mary V.
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	41
Marital Status	Married
Birthplace	Delaware
Age at First Marriage	20
Father's Birthplace	Pennsylvania
Mother's Birthplace	Pennsylvania
Can Read/Write	Yes
Birth State	Delaware
Birth Country	United States
Birthplace (normalized)	delaware

1940

Delaware-County, Pennsylvania

Head, age 49

Delaware-County, Pennsylvania · implied b. ~1891 — 3 household members

Surname	BOYLE
Given Name	Mary
Relationship to Head	Head
Sex	F
Color / Race	White
Age	49
Marital Status	Widowed
Birthplace	Delaware
1935 Residence (City)	CHESTER CITY
1935 Residence (County)	DELAWARE
Class of Worker	0
Hours Worked	0
Highest Grade	No 8
1935 Residence	Same Place
Birth State	Delaware
Birth Country	United States
Birthplace (normalized)	delaware

Model Tree

Linked across censuses

Our Model Tree links Mary Boyle 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 Boyle

Head · 1940 · age 49 · b. ~1891 · Pennsylvania

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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 — Delaware-County, Pennsylvania Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-03489-00369)

Line	Name	Age	Relation	Occupation	Birthplace
1	Son Robert	None	M	—	—
2	Here Ends Block 388 And Begins Block 389	None	—	—	—
3	Stephen Sarnocinski	38	Head	Barber	Poland
4	Edwina Sarnocinski	30	Wife	—	Illinois
5	Diane Sarnocinski	1	Daughter	—	Pennsylvania
6	Henry Meyers	50	Head	Laborer	Pennsylvania
7	Mary Meyers	40	Wife	—	Pennsylvania
8	James Mcclinchey	26	Head	Laborer	Pennsylvania
9	Ruth Mcclinchey	19	Wife	—	Pennsylvania
10	Joe Lee	55	Head	Laundry Man	China
11	Nicholas Bronecke	53	Head	Proprietor	Poland
12	Ksenia Bronecke	52	Wife	—	Poland
13	Son Peter	None	M	Social Security Office	—
14	Katherine Mamenko	46	Head	—	Pennsylvania
15	Walter Mamenko	21	Son	Former Man	Pennsylvania
16	Raymond Mamenko	19	Son	New Worker	Pennsylvania
17	Michael Mamenko	13	Son	—	Pennsylvania
18	Anne Mamenko	11	Daughter	—	Pennsylvania
19	Leona Mamenko	7	Daughter	—	Pennsylvania
20	Alexander Jr. Mamenko	5	Son	—	Pennsylvania
21	Marie Mamenko	2	Daughter	—	Pennsylvania
22	Raymond Wylie	28	Head	Laber	New York
23	Mary Wylie	22	Wife	—	Michigan
24	Thomas Wylie	2	Son	—	Pennsylvania
25	Caroline Wylie	1	Daughter	—	Pennsylvania
26	James B. Jones	42	Head	Die Setter	Maryland
27	Mary A. Jones	33	Wife	—	Pennsylvania
28	Gertrude Jones	14	Daughter	—	Pennsylvania
29	Doris Jones	12	Daughter	—	Pennsylvania
30	James B. Jr. Jones	10	Son	—	Pennsylvania
31	Thomas Jones	8	Son	—	Pennsylvania
32	Here Ends Block 389 And Begins Block 340	None	—	—	—
33	Frank Renfroe	32	Head	Machinist	Florida
34	Dorothy Renfroe	26	Wife	—	Delaware
35	Norman Renfroe	10	Son	—	Pennsylvania
36	William Renfroe	7	Son	—	Pennsylvania
37	Clara Renfroe	2	Daughter	—	Pennsylvania
38	Mary Boyle THIS PERSON	49	Head	—	Delaware
39	James Boyle	27	Son	Laborer	Pennsylvania
40	John Jr. Boyle	21	Son	Laborer	Pennsylvania

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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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