Helen Mason — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Cook-County, Illinois

Our Model Tree links this Helen Mason across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a spouse (b.~1903), then head of a 3-person household.

Age 37 b. ~1903 Female Spouse Born: Illinois Married

1940 Census Record Details

Census Year	1940
Location	Cook-County, Illinois
Surname	Mason
Given Name	Helen
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	37
Marital Status	Married
Birthplace	Illinois
1935 Residence (City)	Chicago
1935 Residence (County)	Cook
Additional Details
Occupation	none
Income (1939)	0
Highest Grade	No 8
1935 Residence	Same place
Birth State	Illinois
Birth Country	United States
Birthplace (normalized)	illinois
Township / Ward	Chicago
Est. Birth Year	~1903

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 Helen	Age	Birth yr
Helen Mason	Spouse	—	37	~1903
James Mason	Head	—	38	~1902
James Mason	Son	—	8	~1932

Census Appearances

1920

Cook, Illinois

Other, age 15

Cook, Illinois · implied b. ~1905 — 5 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Mason
Given Name	Helen
Relationship to Head	granddaughter
Sex	F
Color / Race	White
Age	15
Marital Status	Single
Birthplace	Illinois
Father's Birthplace	Illinois
Mother's Birthplace	Illinois
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Birth State	Illinois
Birth Country	United States
Birthplace (normalized)	illinois

1930

Cook, Illinois

Other, age 26

Cook, Illinois · implied b. ~1904 — 5 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Mason
Given Name	Helen
Relationship to Head	Lodger
Sex	F
Color / Race	White
Age	26
Marital Status	Single
Birthplace	Illinois
Father's Birthplace	Illinois
Mother's Birthplace	Illinois
Occupation	Stenographer
Industry	Publishing Co.
Class of Worker	W
Can Read/Write	Yes
Birth State	Illinois
Birth Country	United States
Birthplace (normalized)	illinois

1940

Cook-County, Illinois

Spouse, age 37

Cook-County, Illinois · implied b. ~1903 — 3 household members

Surname	Mason
Given Name	Helen
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	37
Marital Status	Married
Birthplace	Illinois
1935 Residence (City)	Chicago
1935 Residence (County)	Cook
Occupation	none
Income (1939)	0
Highest Grade	No 8
1935 Residence	Same place
Birth State	Illinois
Birth Country	United States
Birthplace (normalized)	illinois

Model Tree

Linked across censuses

Our Model Tree links Helen Mason 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 Mason

Spouse · 1940 · age 37 · b. ~1903 · Illinois

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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 — Cook-County, Illinois Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-00956-00470)

Line	Name	Age	Relation	Occupation	Birthplace
1	James Mason	38	Head	General Manager	Illinois
2	Helen Mason THIS PERSON	37	Wife	None	Illinois
3	James Jr. Mason	8	Son	—	Illinois
4	Raymond Schmal	28	Head	Assistant Purchasing Agent	Illinois
5	Alice Schmal	25	Wife	Junior Clerk	Illinois
6	Charles Fredrickson	44	Head	Truck Driver	Illinois
7	Cecelia Fredrickson	44	Wife	—	Illinois
8	Gordon Grant	33	Head	Railroad Clerk	Illinois
9	Laura Grant	37	Wife	Supervising Clerk	Illinois
10	George Jordan	48	Head	Clerk	Iowa
11	Bertha Jordan	45	Wife	Clerk	Wisconsin
12	Thomas Baxter	22	Head	Shop Work	Scotland
13	Leona Baxter	18	Wife	Salesgirl	Wisconsin
14	James Peacock	51	Head	Butcher	Illinois
15	Leona Peacock	49	Wife	—	Illinois
16	Ida Huchais	77	Mother-in-law	—	Illinois
17	James Peacock	25	Son	Salesman	Illinois
18	Arthur Morrison	44	Head	Metallographer	Missouri
19	Selma Morrison	41	Wife	—	Arkansas
20	June Morrison	15	Daughter	—	Illinois
21	Katherine Durkin	58	Head	—	Ireland
22	Francis Durkin	23	Son	Asst. Clerk	Illinois
23	Joseph Durkin	21	Son	Clerk	Illinois
24	Milton Prosser	30	Head	Newspaper Driver	Illinois
25	Laurette Prosser	23	Wife	Demonstrator	Illinois
26	Eleanor Melloy	39	Head	Seamstress	England
27	John Melloy	62	Brother	Garment Worker	England
28	Harry Coates	59	Head	Wash Man	Illinois
29	Mary Coates	46	Wife	—	Kentucky
30	John Coates	27	Son	Machinist Apprentice	Illinois
31	Harry Jr. Coates	17	Son	Messenger	Illinois
32	Mary Jane Coates	12	Daughter	—	Illinois
33	Howard Kingsbury	32	Head	Publisher	Illinois
34	Evelyn Kingsbury	29	Wife	Stenographer	Illinois
35	Franklin Weber	31	Head	Sheet Metal Worker	Illinois
36	Viola Weber	30	Wife	—	Kansas
37	Frank E. Ii Weber	5	Son	—	Illinois
38	Philip M. Weber	1	Son	—	Wisconsin
39	Frank E. Weber	59	Father	Maltster	Illinois
40	Hermina Weber	56	Mother	—	Illinois

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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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