Mary Muller — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Maricopa-County, Arizona

Our Model Tree links this Mary Muller across the 1920, 1930 and 1940 US Censuses in Maricopa-County, Arizona (XGBoost, ~Confirmed) — first a head (b.~1888), then head of a 2-person household.

Age 52 b. ~1888 Female Head Born: Ireland Widowed

1940 Census Record Details

Census Year	1940
Location	Maricopa-County, Arizona
Surname	Muller
Given Name	Mary
Relationship to Head	Head
Sex	F
Color / Race	White
Age	52
Marital Status	Widowed
Birthplace	Ireland
1935 Residence (City)	Phoenix City
1935 Residence (County)	Maricopa
Naturalization Status	Naturalized
Additional Details
Occupation	File Clerk
Industry	WPA Food Store
Class of Worker	GW
Hours Worked	6
Income (1939)	544
Highest Grade	Hs 2
1935 Residence	Same Place
Birth Country	Ireland
Birthplace (normalized)	ireland
Occupation	File Clerk
Township / Ward	Phoenix City
Est. Birth Year	~1888

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 Mary	Age	Birth yr
Mary Muller	Head	—	52	~1888
Catherine Muller	Daughter	—	26	~1914

Census Appearances

1920

Maricopa, Arizona

Head, age 32

Maricopa, Arizona · implied b. ~1888 — 8 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Muller
Given Name	Mary A.
Relationship to Head	Head
Sex	F
Color / Race	White
Age	32
Marital Status	Widowed
Birthplace	Ireland
Father's Birthplace	Ireland
Mother's Birthplace	Ireland
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Mother Tongue	Irish
Home Owned/Rented	R
Birth Country	Ireland
Birthplace (normalized)	ireland

1930

Maricopa, Arizona

Head, age 39

Maricopa, Arizona · implied b. ~1891 — 3 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Muller
Given Name	Mary E
Relationship to Head	Head
Sex	F
Color / Race	White
Age	39
Marital Status	Widowed
Birthplace	Ireland
Naturalization Status	Naturalized
Year of Immigration	1907
Age at First Marriage	22
Father's Birthplace	Ireland
Mother's Birthplace	Ireland
Occupation	Cashier
Industry	Furniture Store
Class of Worker	W
Can Read/Write	Yes
Mother Tongue	English
Home Owned/Rented	R
Home Value / Rent	11
Radio Set	50
Birth Country	Ireland
Birthplace (normalized)	ireland

1940

Maricopa-County, Arizona

Head, age 52

Maricopa-County, Arizona · implied b. ~1888 — 2 household members

Surname	Muller
Given Name	Mary
Relationship to Head	Head
Sex	F
Color / Race	White
Age	52
Marital Status	Widowed
Birthplace	Ireland
1935 Residence (City)	Phoenix City
1935 Residence (County)	Maricopa
Naturalization Status	Naturalized
Occupation	File Clerk
Industry	WPA Food Store
Class of Worker	GW
Hours Worked	6
Income (1939)	544
Highest Grade	Hs 2
1935 Residence	Same Place
Birth Country	Ireland
Birthplace (normalized)	ireland

Model Tree

Linked across censuses

Our Model Tree links Mary Muller 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 Muller

Head · 1940 · age 52 · b. ~1888 · Arizona

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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 — Maricopa-County, Arizona Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-00105-00556)

Line	Name	Age	Relation	Occupation	Birthplace
1	Thelma B Koon	33	Wife	Paddler	Texas
2	Norma A Koon	16	Daughter	—	Texas
3	Beryl A Koon	11	Daughter	—	Texas
4	John J Harris	69	Father-in-law	Paddler	Texas
5	Fred Black	38	Lodger	Paddler	Texas
6	Edna Townsend	38	Head	Nurse	Pennsylvania
7	Vera Townsend	30	Sister	Switch Board	Pennsylvania
8	Eaton H Clarke	28	Head	Salesman	Tennessee
9	Pauline Clarke	27	Wife	Stenographer	Utah
10	Mary Muller THIS PERSON	52	Head	File Clerk	Ireland
11	Catherine Muller	26	Daughter	—	Pennsylvania
12	Edith Arnold	40	Head	Clerk Supervisor	Nebraska
13	Fern J Arnold	19	Daughter	File Clerk	Colorado
14	Emertt R Arnold	17	Son	File Clerk	Colorado
15	Henry C Lonsdale	64	Head	Oil Driller	Indiana
16	Minnie Lonsdale	63	Wife	—	Kansas
17	Lawrence Lonsdale	34	Son	Salesman	Oklahoma
18	Sylvia Hartman	21	Head	Waitress Cashier	Oklahoma
19	Iovanna Faulkner	27	Partner	Supervisor	Oklahoma
20	Anna M Miller	68	Head	Part Owner + Manager	Ohio
21	Arthur Peabody	58	Head	Manager	West Virginia
22	Elsie Peabody	53	Wife	Teacher	Kentucky
23	Wayne Horton	26	Head	Drug Clerk	Oklahoma
24	Viola Horton	21	Wife	—	Arizona
25	Phillip Genovese	33	Lodger	Salesman	New York
26	Teresa Genovese	31	Lodger	Bookkeeper	Illinois
27	Melanie Herlick	74	Head	—	Denmark
28	Martin H Herlick	45	Son	Lawyer	Arizona
29	Sara C Ruggles	81	Head	—	Indiana
30	Oscar Ruggles	52	Son	Salesman	Indiana
31	Lucas Olynek	53	Lodger	Porter	Austria
32	John S Bergman	25	Head	Janitor	Illinois
33	A. N. Bellmer	41	Head	Manager	Minnesota
34	Wilma Bellmer	42	Wife	—	Indiana
35	Catherine Bellmer	18	Daughter	Tracer	California
36	Forest Bellmer	17	Son	Automobile Washer	California
37	Myrtle Byhre	47	Head	—	South Dakota
38	Robert Byhre	13	Son	—	South Dakota
39	Chas. E. Farrell	57	Head	Salesman	Kansas
40	Minnie Farrell	44	Wife	—	Kentucky

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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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