Mary Harrington — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Middlesex-County, Massachusetts

Our Model Tree links this Mary Harrington across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed) — first a head (b.~1870), then head of a 5-person household.

Age 70 b. ~1870 Female Head Born: Ireland Widowed

1940 Census Record Details

Census Year	1940
Location	Middlesex-County, Massachusetts
Surname	Harrington
Given Name	Mary
Relationship to Head	Head
Sex	F
Color / Race	White
Age	70
Marital Status	Widowed
Birthplace	Ireland
1935 Residence (City)	Lowell
1935 Residence (County)	Middlesex
Naturalization Status	Naturalized
Additional Details
Occupation	At Home
Highest Grade	H-4
1935 Residence	Same Place
Birth Country	Ireland
Birthplace (normalized)	ireland
Occupation	At Home
Township / Ward	Lowell
Est. Birth Year	~1870

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.

5 people recorded at the same address in the 1940 census.

Name	Relation to head	Relative to Mary	Age	Birth yr
Mary Dillon	Daughter	—	40	~1900
Mary Harrington	Head	—	70	~1870
Mary Dillon	Other	—	8	~1932
Arthur Dillon	Other	—	11	~1929
Edward Dillon	Other	—	10	~1930

Census Appearances

1920

Middlesex, Massachusetts

Spouse, age 49

Middlesex, Massachusetts · implied b. ~1871 — 11 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Harrington
Given Name	Mary
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	49
Marital Status	Married
Birthplace	Ireland
Year of Immigration	1880
Naturalization Status	Naturalized
Father's Birthplace	Ireland
Mother's Birthplace	Ireland
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Mother Tongue	English
Birth Country	Ireland
Year of Naturalization	1888
Birthplace (normalized)	ireland

1930

Middlesex, Massachusetts

Other, age 60

Middlesex, Massachusetts · implied b. ~1870 — 7 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Harrington
Given Name	Mary A.
Relationship to Head	Wife-H
Sex	F
Color / Race	White
Age	60
Marital Status	Married
Birthplace	Ireland
Naturalization Status	Naturalized
Year of Immigration	1880
Age at First Marriage	21
Father's Birthplace	Ireland
Mother's Birthplace	Ireland
Can Read/Write	Yes
Mother Tongue	Irish
Birth Country	Ireland
Birthplace (normalized)	ireland

1940

Middlesex-County, Massachusetts

Head, age 70

Middlesex-County, Massachusetts · implied b. ~1870 — 5 household members

Surname	Harrington
Given Name	Mary
Relationship to Head	Head
Sex	F
Color / Race	White
Age	70
Marital Status	Widowed
Birthplace	Ireland
1935 Residence (City)	Lowell
1935 Residence (County)	Middlesex
Naturalization Status	Naturalized
Occupation	At Home
Highest Grade	H-4
1935 Residence	Same Place
Birth Country	Ireland
Birthplace (normalized)	ireland

Model Tree

Linked across censuses

Our Model Tree links Mary Harrington 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 Harrington

Head · 1940 · age 70 · b. ~1870 · 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 — Middlesex-County, Massachusetts Open full size

Page Contents

39 people indexed on this census page (nara:1940:m-t0627-01691-00698)

Line	Name	Age	Relation	Occupation	Birthplace
41	Daisy Gilligan	24	Wife	At Home	West Hampton
42	George Gilligan	3	Son	—	Mass
43	Bell Josephine Gilligan	66	Mother-in-law	At Home	Provincetown
44	Benjamin Skinner	84	Head	At Home	Mass
45	Jennings Annie	65	Head	—	Mass
46	Mary Harrington THIS PERSON	70	Head	At Home	Ireland
47	Mary Dillon	40	Daughter	Finisher	Rhode Island
48	Arthur Dillon	11	G-Son	—	Mass
49	Edward Dillon	10	G-Son	—	Mass
50	Mary Dillon	8	G-Daughter	—	Mass
51	Isaac Barsalow	39	Head	Truck Driver	Canada
52	Emma Barsalow	60	Wife	At Home	Canada
53	Bertha Barsalow	34	Daughter	Weaver	Mass
54	Bernadette Barsalow	18	Daughter	At Home	Mass
55	Herbert Ahern	30	Head	Truck Driver	Mass
56	Rita Ahern	23	Wife	At Home	Mass
57	Joan Ahern	3	Daughter	—	Mass
58	Mary Louise Ahern	2	Daughter	—	Mass
59	Barbara Ann Ahern	1	Daughter	—	Mass
60	Edith Mrs. Hitch	42	Head	Stitcher	Mass
61	Hugo Hitch	21	Son	Electrician	Mass
62	Mina Mrs. Merrill	82	Mother	At Home	Mass
63	Alice Mrs. Gladu	64	Head	At Home	Canada
64	Bernadette Gladu	41	Daughter	Knitting	Mass
65	Sylva Gladu	33	Son	Salesman	Mass
66	Alice Jasmin	56	Sister	Housework	Canada
68	Isa Houston	46	Head	Laborer	New Hampshire
69	Odita Houston	37	Wife	At Home	Dist. of Columbia
70	Allan Houston	9	Son	—	Mass
71	Cathrine Houston	4	Daughter	—	Mass
72	Jean Houston	2	Daughter	—	Mass
73	John Beauvais	59	Lodger	Sta. Engineer	Canada
74	Thomas Keller	48	Head	Gardener	Mass
75	Annie Keller	43	Wife	At Home	Mass
76	Louise Keller	6	Daughter	—	Mass
77	Arthur Conway	37	Head	Truck Driver	Mass
78	Elizabeth Conway	37	Wife	At Home	Mass
79	Irene Conway	13	Daughter	—	Mass
80	Marilyn Conway	11	Daughter	—	Mass

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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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