John Muller — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Cook-County, Illinois

Our Model Tree links this John Muller across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1890), then head of a 4-person household.

Age 50 b. ~1890 Male Head Born: Hungary Married

1940 Census Record Details

Census Year	1940
Location	Cook-County, Illinois
Surname	Muller
Given Name	John
Relationship to Head	Head
Sex	M
Color / Race	White
Age	50
Marital Status	Married
Birthplace	Hungary
1935 Residence (City)	Chicago City
1935 Residence (County)	Cook
Naturalization Status	Naturalized
Additional Details
Occupation	Motorman
Industry	Surface Lines
Class of Worker	PW
Hours Worked	40
Income (1939)	2000
Highest Grade	No 7
1935 Residence	Same house
Birth Country	Hungary
Birthplace (normalized)	hungary
Occupation	Motorman
Township / Ward	Chicago City
Est. Birth Year	~1890

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.

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

Name	Relation to head	Relative to John	Age	Birth yr
Emily Muller	Daughter	—	24	~1916
Mary Muller	Spouse	—	42	~1898
John Muller	Son	—	21	~1919
John Muller	Head	—	50	~1890

Census Appearances

1920

Cook, Illinois

Head, age 29

Cook, Illinois · implied b. ~1891

● Primary link · ~Confirmed · 1 source

XGBoost

Surname	Miller
Given Name	John
Relationship to Head	Head
Sex	M
Color / Race	White
Age	29
Marital Status	Married
Birthplace	Hungary
Year of Immigration	1913
Naturalization Status	First papers filed
Father's Birthplace	Hungary
Mother's Birthplace	Hungary
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Mother Tongue	Hungarian
Home Owned/Rented	O
Home Free/Mortgaged	R
Birth Country	Hungary
Birthplace (normalized)	hungary

1930

Cook, Illinois

Head, age 40

Cook, Illinois · implied b. ~1890 — 5 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Muller
Given Name	John
Relationship to Head	Head
Sex	M
Color / Race	White
Age	40
Marital Status	Married
Birthplace	Hungary
Naturalization Status	Naturalized
Year of Immigration	1913
Age at First Marriage	39
Father's Birthplace	Hungary
Mother's Birthplace	Hungary
Occupation	Inspector
Industry	Tailor Shop
Class of Worker	W
Can Read/Write	Yes
Mother Tongue	Hungarian
Home Owned/Rented	R
Home Value / Rent	75.00
Birth Country	Hungary
Birthplace (normalized)	hungary

1940

Cook-County, Illinois

Head, age 50

Cook-County, Illinois · implied b. ~1890 — 4 household members

Surname	Muller
Given Name	John
Relationship to Head	Head
Sex	M
Color / Race	White
Age	50
Marital Status	Married
Birthplace	Hungary
1935 Residence (City)	Chicago City
1935 Residence (County)	Cook
Naturalization Status	Naturalized
Occupation	Motorman
Industry	Surface Lines
Class of Worker	PW
Hours Worked	40
Income (1939)	2000
Highest Grade	No 7
1935 Residence	Same house
Birth Country	Hungary
Birthplace (normalized)	hungary

Model Tree

Linked across censuses

Our Model Tree links John 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

John Muller

Head · 1940 · age 50 · b. ~1890 · 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

35 people indexed on this census page (nara:1940:m-t0627-00999-00648)

Line	Name	Age	Relation	Occupation	Birthplace
41	Julie Wesley	42	Lodger	—	Czeslovia
42	Julie Wesley	18	Lodger	New Worker	Illinois
43	John Muller THIS PERSON	50	Head	Motorman	Hungary
44	Mary Muller	42	Wife	Seamstress	Hungary
45	Emily Muller	24	Daughter	—	Illinois
46	John M. Muller	21	Son	Spray Man	Illinois
47	Joseph Rinzel	62	Head	Real Estate	Czeslovia
48	Barbara J. Rinzel	60	Wife	—	Czeslovia
49	Joseph Wierzbicki	71	Head	Finisher	Poland
50	Alex Wierzbicki	31	Son	Laborer	Pennsylvania
51	John D. Wierzbicki	29	Son	Foundry Wk	Pennsylvania
52	Helen R. Jones	41	Daughter	Seamstress	Ohio
53	Marie Grasher	39	Daughter	Floor Lady	Pennsylvania
54	Minnie Roeske	48	Lodger	Seamstress	Illinois
55	Joseph Seibert	53	Head	Bridge Tender	Illinois
56	Lila R. Seibert	50	Wife	—	Illinois
57	John F. Smith	52	Brother-in-law	Fireman	Illinois
58	Suljo Nurkewicz	63	Head	Laborer	Jugoslavia
59	Eva Nurkewicz	56	Wife	House Keeper	Roumania
60	Stephen Olsen	52	Head	Baker	Germany
61	Theresia Olsen	48	Wife	Clerk	Roumania
62	Susan D. Olsen	28	Daughter	Clerk	Illinois
63	Louis Olsen	25	Son	Baker Asst	Illinois
64	Martin Olsen	21	Son	Baker Asst	Illinois
65	John Koch	28	Head	Bartender	Illinois
66	Lillian Koch	34	Wife	Clerk	Illinois
67	Alma Heinz	47	Mother-in-law	Maid	Austria
68	Jack E. Miller	21	Head	Chauffeur	Illinois
69	Kitty V. Miller	18	Wife	—	Sweden
70	Dagmar J. Carlson	20	Sister-in-law	Inspector	Sweden
71	Edward H. Fischer	35	Head	Asst. Chemist	New Jersey
72	Florence A. Fischer	26	Wife	Laboratory Assistant	Illinois
73	Lillian M. Rost	54	Head	—	Illinois
74	Violet A. Rost	36	Daughter	Stenographer	Illinois
75	Pauline Ollrich	70	Mother-in-law	—	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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