Mary Henderson — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Essex-County, Massachusetts

Our Model Tree links this Mary Henderson across the 1920, 1930 and 1940 US Censuses in Essex-County, Massachusetts (XGBoost, ~Confirmed) — first a spouse (b.~1859), then head of a 3-person household.

Age 81 b. ~1859 Female Spouse Born: Maine Married

1940 Census Record Details

Census Year	1940
Location	Essex-County, Massachusetts
Surname	Henderson
Given Name	Mary S.
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	81
Marital Status	Married
Birthplace	Maine
1935 Residence (City)	Lawrence City
1935 Residence (County)	Essex
Additional Details
Highest Grade	No 8
1935 Residence	Same house
Birth State	Maine
Birth Country	United States
Birthplace (normalized)	maine
Township / Ward	Lawrence City
Est. Birth Year	~1859

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
Mildred Henderson	Daughter	—	45	~1895
Robert Henderson	Head	—	81	~1859
Mary Henderson	Spouse	—	81	~1859

Census Appearances

1920

Essex, Massachusetts

Spouse, age 57

Essex, Massachusetts · implied b. ~1863 — 6 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Henderson
Given Name	May
Relationship to Head	wife
Sex	F
Color / Race	White
Age	57
Marital Status	Married
Birthplace	Maine
Father's Birthplace	Maine
Mother's Birthplace	Maine
Occupation	none
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Birth State	Maine
Birth Country	United States
Birthplace (normalized)	maine

1930

Essex, Massachusetts

Spouse, age 71

Essex, Massachusetts · implied b. ~1859 — 4 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Henderson
Given Name	Mary A.
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	71
Marital Status	Married
Birthplace	Maine
Age at First Marriage	22
Father's Birthplace	Massachusetts
Mother's Birthplace	Maine
Occupation	none
Can Read/Write	Yes
Mother Tongue	English
Birth State	Maine
Birth Country	United States
Birthplace (normalized)	maine

1940

Essex-County, Massachusetts

Spouse, age 81

Essex-County, Massachusetts · implied b. ~1859 — 3 household members

Surname	Henderson
Given Name	Mary S.
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	81
Marital Status	Married
Birthplace	Maine
1935 Residence (City)	Lawrence City
1935 Residence (County)	Essex
Highest Grade	No 8
1935 Residence	Same house
Birth State	Maine
Birth Country	United States
Birthplace (normalized)	maine

Model Tree

Linked across censuses

Our Model Tree links Mary Henderson 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 Henderson

Spouse · 1940 · age 81 · b. ~1859 · Massachusetts

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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 — Essex-County, Massachusetts Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-01584-00501)

Line	Name	Age	Relation	Occupation	Birthplace
41	Alphonse Vachon	39	Head	Shoe Cutter	New Hampshire
42	Christine Vachon	32	Wife	Floor Lady	Massachusetts
43	Alfred Bazin	31	Head	Cook	Massachusetts
44	Alice Bazin	28	Wife	Shoe Worker	Maine
45	Ronald Bazin	6	Son	—	Massachusetts
46	Leonard Mulligan	43	Head	Chauffeur	Canada
47	William Mulligan	18	Son	—	Massachusetts
48	Ruth Mulligan	15	Daughter	—	Massachusetts
49	Leonard Jr. Mulligan	8	Son	—	Massachusetts
50	Amanda Gagnon	68	Head	—	Canada
51	Bertha Gagnon	31	Daughter	Mender	Massachusetts
52	Rosa Goodsell	43	Daughter	—	Massachusetts
53	Harry J. Fallon	58	Head	Foreman	New York
54	Hattie Fallon	58	Wife	—	Massachusetts
55	Grace Fallon	35	Daughter	Saleslady	Massachusetts
56	James J. O'Keefe	58	Head	Yard Foreman	Massachusetts
57	Omera O'Keefe	60	Wife	—	French
58	Oscar Guilmette	42	Head	Mechanic	Massachusetts
59	Edmond Lacroix	50	Head	Weaver	Canada
60	Georgiana Lacroix	48	Wife	—	Canada
61	Doris Lacroix	18	Daughter	Finisher	Massachusetts
62	Lionel Lacroix	16	Son	Garage Hand	Massachusetts
63	Elzie Bissonnette	54	Head	Twister	Canada
64	Bernadette Gagnon	47	Daughter	Cobbler	French
65	Jeanne S. Gagnon	18	Daughter	—	Massachusetts
66	Balzamie Bissonnette	57	Sister	Housework	French
67	Samuel Bissonnette	52	Brother	Painter	Canada
68	Robert E. Henderson	81	Head	—	Maine
69	Mary S. Henderson THIS PERSON	81	Wife	—	Maine
70	Mildred E. Henderson	45	Daughter	Clerk	Maine
71	Beatrice Christie	34	Head	—	Massachusetts
72	William Christie	7	Son	—	Massachusetts
73	Thomas E. Tetreau	44	Head	Clerk	Massachusetts
74	Phoebe Tetreau	37	Wife	Sewing	Vermont
75	Hazel Tetreau	17	Daughter	—	Vermont
76	Elizabeth Tetreau	15	Daughter	—	Vermont
77	Philabert Tetreau	14	Daughter	—	Vermont
78	Dennis R. Donovan	62	Head	—	Connecticut
79	Mary Jane Donovan	56	Wife	Mender	French
80	Florence Donovan	34	Daughter	Mender	Connecticut

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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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