Helen Mason — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Tama-County, Iowa

Our Model Tree links this Helen Mason across the 1920, 1930 and 1940 US Censuses in Tama-County, Iowa (XGBoost, ~Confirmed) — first a spouse (b.~1899), then head of a 5-person household.

Age 41 b. ~1899 Female Spouse Born: Iowa Married

1940 Census Record Details

Census Year	1940
Location	Tama-County, Iowa
Surname	Mason
Given Name	Helen
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	41
Marital Status	Married
Birthplace	Iowa
1935 Residence (City)	Tama City
Additional Details
Income (1939)	0
Highest Grade	H-4
1935 Residence	Iowa
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa
Township / Ward	Tama City
Est. Birth Year	~1899

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 Helen	Age	Birth yr
Helen Mason	Spouse	—	41	~1899
Charles Mason	Son	—	19	~1921
Alice Mason	Other	—	16	~1924
Leland Mason	Head	—	41	~1899
Edith Mason	Other	—	14	~1926

Census Appearances

1920

Tama, Iowa

Spouse, age 21

Tama, Iowa · implied b. ~1899 — 2 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Mason
Given Name	Hellen
Relationship to Head	wife
Sex	F
Color / Race	White
Age	21
Marital Status	Married
Birthplace	Iowa
Father's Birthplace	Illinois
Mother's Birthplace	Iowa
Occupation	none
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa

1930

Tama, Iowa

Spouse, age 31

Tama, Iowa · implied b. ~1899 — 5 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Mason
Given Name	Helen C.
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	31
Marital Status	Married
Birthplace	Iowa
Age at First Marriage	19
Father's Birthplace	Illinois
Mother's Birthplace	Iowa
Can Read/Write	Yes
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa

1940

Tama-County, Iowa

Spouse, age 41

Tama-County, Iowa · implied b. ~1899 — 5 household members

Surname	Mason
Given Name	Helen
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	41
Marital Status	Married
Birthplace	Iowa
1935 Residence (City)	Tama City
Income (1939)	0
Highest Grade	H-4
1935 Residence	Iowa
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa

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 41 · b. ~1899 · Iowa

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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 — Tama-County, Iowa Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-01207-00483)

Line	Name	Age	Relation	Occupation	Birthplace
1	Mary C. Thompson	59	Head	Saleslady	Iowa
2	Harry Millman	56	Head	Truck Driver	Nebraska
3	Margaret Millman	23	Dtr	—	Iowa
4	Kenneth Fiala	29	Head	Truck Driver	Iowa
5	Theresa Fiala	30	Wife	—	Illinois
6	Barbara Fiala	4	Dtr	—	Iowa
7	Alicia Fiala	2	Dtr	—	Iowa
8	Elizabeth Wheeler	54	Head	—	Iowa
9	Virginia Wheeler	21	Dtr	—	Iowa
10	William J. Jessie	56	Head	—	Iowa
11	Mary Jessie	60	Wife	—	Iowa
12	Elmer Kensinger	50	Head	—	Iowa
13	Edward Goodell	61	Head	Accountant	Iowa
14	Hazel Goodell	50	Wife	Asst Accountant	Iowa
15	Emma Moffitt	80	Mother-in-law	—	Iowa
16	Joseph E. Zeman	65	Head	—	Iowa
17	Julia Zeman	61	Wife	—	Iowa
18	Joseph Jr. Zeman	37	Son	Proprietor	Iowa
19	Jessie Zeman	29	Dtr	Saleslady	Iowa
20	Leland Mason	41	Head	Manager	Iowa
21	Helen Mason THIS PERSON	41	Wife	—	Iowa
22	Charles Mason	19	Son	Clerk	Iowa
23	Alice Mason	16	Dtr	—	Iowa
24	Edith Mason	14	Dtr	—	Iowa
25	Mary Simek	68	Head	—	Czechoslovakia
26	Archie J. Simek	49	Head	Buyer	Arkansas
27	Lida M. Simek	50	Wife	—	Indiana
28	Lida M. Smith	78	Mother-in-law	—	Indiana
29	William S. Cobb	52	Head	Mechanic	Missouri
30	Lulu Cobb	51	Wife	—	Iowa
31	John Witosky	44	Head	—	Czechoslovakia
32	Minnie Witosky	53	Wife	Teacher	Iowa
33	Chalmer R. Johnson	84	Head	—	Ohio
34	Ella E. Johnson	78	Wife	—	Indiana
35	Agnes Allen	54	Dtr	—	Iowa
36	Rowland Mcfarland	50	Head	Owner & Manager	Illinois
37	Florence Mcfarland	51	Wife	—	Nebraska
38	John W. Shields	82	Father-in-law	—	Pennsylvania
39	Patrick Kilmartin	65	Head	—	Iowa
40	James Kilmartin	66	Brother	—	Iowa

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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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