Helen Clark — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Middlesex-County, Massachusetts

Our Model Tree links this Helen Clark across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed) — first a head (b.~1864), then head of a 2-person household.

Age 76 b. ~1864 Female Head Born: Massachusetts Widowed

1940 Census Record Details

Census Year	1940
Location	Middlesex-County, Massachusetts
Surname	Clark
Given Name	Helen G.
Relationship to Head	Head
Sex	F
Color / Race	White
Age	76
Marital Status	Widowed
Birthplace	Massachusetts
1935 Residence (City)	Somerville city
1935 Residence (County)	Middlesex
Additional Details
Highest Grade	8
1935 Residence	Same House
Birth State	Massachusetts
Birth Country	United States
Birthplace (normalized)	massachusetts
Township / Ward	Somerville City
Est. Birth Year	~1864

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.

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

Name	Relation to head	Relative to Helen	Age	Birth yr
Mary Clark	Daughter	—	44	~1896
Helen Clark	Head	—	76	~1864

Census Appearances

1920

Middlesex, Massachusetts

Spouse, age 58

Middlesex, Massachusetts · implied b. ~1862 — 3 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Clark
Given Name	Helen L
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	58
Marital Status	Married
Birthplace	Massachusetts
Father's Birthplace	Maine
Mother's Birthplace	Massachusetts
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Birth State	Massachusetts
Birth Country	United States
Birthplace (normalized)	massachusetts

1930

Middlesex, Massachusetts

Spouse, age 69

Middlesex, Massachusetts · implied b. ~1861 — 4 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Clark
Given Name	Helen
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	69
Marital Status	Married
Birthplace	Massachusetts
Age at First Marriage	25
Father's Birthplace	Maine
Mother's Birthplace	Massachusetts
Can Read/Write	Yes
Birth State	Massachusetts
Birth Country	United States
Birthplace (normalized)	massachusetts

1940

Middlesex-County, Massachusetts

Head, age 76

Middlesex-County, Massachusetts · implied b. ~1864 — 2 household members

Surname	Clark
Given Name	Helen G.
Relationship to Head	Head
Sex	F
Color / Race	White
Age	76
Marital Status	Widowed
Birthplace	Massachusetts
1935 Residence (City)	Somerville city
1935 Residence (County)	Middlesex
Highest Grade	8
1935 Residence	Same House
Birth State	Massachusetts
Birth Country	United States
Birthplace (normalized)	massachusetts

Model Tree

Linked across censuses

Our Model Tree links Helen Clark across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.

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This person

Anchor record

Helen Clark

Head · 1940 · age 76 · b. ~1864 · 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

40 people indexed on this census page (nara:1940:m-t0627-01705-00004)

Line	Name	Age	Relation	Occupation	Birthplace
1	Alfred R. Dugan	39	Head	Teller	Massachusetts
2	Edith M. Dugan	40	Wife	—	Massachusetts
3	Robert A. Dugan	4	Son	—	Massachusetts
4	Ethel M. Dugan	46	Sister	Clerk	Massachusetts
5	Walter G. Cooper	55	Head	Salesman	Massachusetts
6	Jessie G. Cooper	61	Wife	—	Massachusetts
7	Clara Aguere	75	Head	—	Massachusetts
8	Ruth Aguere	40	Daughter	Stenographer	Massachusetts
9	Hortense Aguere	39	Daughter	Teller	Massachusetts
10	Edward H. Harrington	52	Head	Fireman	Massachusetts
11	Eleanor Harrington	21	Daughter	—	Massachusetts
12	Marion Harrington	17	Daughter	—	Massachusetts
13	Sarah Cassidy	68	Lodger	—	Massachusetts
14	Anna Cassidy	61	Lodger	—	Massachusetts
15	Helen G. Clark THIS PERSON	76	Head	—	Massachusetts
16	Mary G. Clark	44	Daughter	Stenographer	Massachusetts
17	Benjamin Kent	35	Head	Salesman	Massachusetts
18	Lucy G. Malloy	59	Housekeeper	Housekeeper	Canada-English
19	Hugh W. Lennon	55	Head	—	Massachusetts
20	Janet A. Lennon	55	Wife	—	Massachusetts
21	Pearl C. Lennon	27	Daughter	Secretary	Massachusetts
22	Roger W. Lennon	25	Son	Shipper	Canada-English
23	Robert Earl Dickson	47	Head	Dentist	Massachusetts
24	Robert Earl Jr. Dickson	13	Son	—	Massachusetts
25	Kenneth M. Dickson	10	Son	—	Massachusetts
26	Blanche A. Dickson	75	Mother	—	Ireland
27	William F. Howard	53	Head	Attorney	Massachusetts
28	Anna Howard	51	Wife	—	Massachusetts
29	Alice Howard	23	Daughter	—	Massachusetts
30	Paul C. Rothary	30	Head	Decorator	Germany
31	Honor Rothary	27	Wife	Violin Teacher	Armenia
32	Paul C. Jr. Rothary	0	Son	—	Massachusetts
33	Francis C. Nelson	38	Head	Salesman	Massachusetts
34	Coraw Nelson	37	Wife	—	Massachusetts
35	Martha J. Nelson	12	Daughter	—	Massachusetts
36	Betty L. Nelson	10	Daughter	—	Massachusetts
37	James F. Coughlin	35	Head	Auto Mechanic	Eire
38	Catherine Coughlin	30	Wife	—	Eire
39	Catherine Coughlin	3	Daughter	—	Massachusetts
40	Brenda Coughlin	2	Daughter	—	Massachusetts

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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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