Mary Campbell — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Cecil-County, Maryland

Our Model Tree links this Mary Campbell across the 1920, 1930 and 1940 US Censuses in Cecil-County, Maryland (XGBoost, ~Confirmed) — first a spouse (b.~1888), then head of a 3-person household.

Age 52 b. ~1888 Female Spouse Born: Maryland Married

1940 Census Record Details

Census Year	1940
Location	Cecil-County, Maryland
Surname	Campbell
Given Name	Mary J.
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	52
Marital Status	Married
Birthplace	Maryland
1935 Residence (City)	Election Dist. #5, 5th Dist. (Part of)
1935 Residence (County)	Cecil
Additional Details
Occupation	Housekeeper
Industry	Private Family
Class of Worker	PW
Hours Worked	72
Income (1939)	156
Highest Grade	7
1935 Residence	Same place
Birth State	Maryland
Birth Country	United States
Birthplace (normalized)	maryland
Occupation	Housekeeper
Township / Ward	Election Dist 5 5Th Dist Part Of
Est. Birth Year	~1888

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
Gilbert Campbell	Head	—	52	~1888
Richard Campbell	Son	—	15	~1925
Mary Campbell	Spouse	—	52	~1888

Census Appearances

1920

Cecil, Maryland

Spouse, age 32

Cecil, Maryland · implied b. ~1888 — 6 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Campbell
Given Name	Mary E.
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	32
Marital Status	Married
Birthplace	Maryland
Father's Birthplace	Maryland
Mother's Birthplace	Maryland
Occupation	Housewife
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Birth State	Maryland
Birth Country	United States
Birthplace (normalized)	maryland

1930

Cecil, Maryland

Spouse, age 42

Cecil, Maryland · implied b. ~1888 — 8 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Campbell
Given Name	Mary M
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	42
Marital Status	Married
Birthplace	Maryland
Age at First Marriage	22
Father's Birthplace	Maryland
Mother's Birthplace	Maryland
Can Read/Write	Yes
Birth State	Maryland
Birth Country	United States
Birthplace (normalized)	maryland

1940

Cecil-County, Maryland

Spouse, age 52

Cecil-County, Maryland · implied b. ~1888 — 3 household members

Surname	Campbell
Given Name	Mary J.
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	52
Marital Status	Married
Birthplace	Maryland
1935 Residence (City)	Election Dist. #5, 5th Dist. (Part of)
1935 Residence (County)	Cecil
Occupation	Housekeeper
Industry	Private Family
Class of Worker	PW
Hours Worked	72
Income (1939)	156
Highest Grade	7
1935 Residence	Same place
Birth State	Maryland
Birth Country	United States
Birthplace (normalized)	maryland

Model Tree

Linked across censuses

Our Model Tree links Mary Campbell 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 Campbell

Spouse · 1940 · age 52 · b. ~1888 · Maryland

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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 — Cecil-County, Maryland Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-01545-00398)

Line	Name	Age	Relation	Occupation	Birthplace
41	Peter H. Hanson	67	Head	Farmer	Germany
42	Katherine H. Hanson	60	Wife	—	Germany
43	Harry H. Hanson	30	Son	Farm Laborer	Iowa
44	Frank A. Bullock	46	Head	Farmer	Penn.
45	Grace A. Bullock	38	Wife	—	Penn.
46	Frances G. Bullock	13	Daughter	—	Penn.
47	Frank A. Jr. Bullock	12	Son	—	Penn.
48	Howard G. Bullock	10	Son	—	Penn.
49	William S. Bullock	8	Son	—	Penn.
50	Frank D. Gilbert	66	Father-in-law	Farmer	Penn.
51	Anna M. Gilbert	57	Mother-in-law	—	Penn.
52	Ben M. Johnson	45	Head	Farm Laborer	North Carolina
53	Isabelle A. Johnson	45	Wife	—	Virginia
54	Pauline E. Johnson	16	Daughter	—	West Virginia
55	Ernest H. Johnson	13	Son	—	West Virginia
56	John F. Johnson	9	Son	—	Virginia
57	Russell D. Johnson	8	Son	—	Virginia
58	Charlotte J. Johnson	5	Daughter	—	Virginia
59	John B. Abel	52	Head	Farmer	Maryland
60	Helen T. Abel	41	Wife	—	Maryland
61	Charles E. Singleton	28	Head	Farm Laborer	Maryland
62	Melva V. Singleton	22	Wife	—	Central England
63	Nora R. Price	74	Head	—	Maryland
64	Harry A. Price	32	Son	Painter	Maryland
65	Dorothy T. Price	25	Daughter-in-law	—	Maryland
66	Howard A. Jr. Price	10	Grandson	—	Delaware
67	Leslie A. Price	6	Granddaughter	—	Maryland
68	Charles N. Price	3	Grandson	—	Maryland
69	Gilbert C. Campbell	52	Head	Farm Laborer	Maryland
70	Mary J. Campbell THIS PERSON	52	Wife	Housekeeper	Maryland
71	Richard H. Campbell	15	Son	New Worker	Maryland
72	William T. Dinsmore	74	Head	Farmer	Maryland
73	Gertrude M. Dinsmore	74	Wife	—	Maryland
74	Hilda M. Dinsmore	42	Daughter	—	Maryland
75	Frank J. Corner	41	Head	Farm Laborer	Virginia
76	Effie F. Corner	36	Wife	—	Virginia
77	Charles H. Corner	18	Daughter	Farm Laborer	Virginia
78	Bryan D. Corner	15	Son	—	Virginia
79	Frank J. Jr. Corner	13	Son	—	Maryland
80	John W. Corner	10	Son	—	Maryland

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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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