Thomas Cox — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Cook-County, Illinois

Our Model Tree links this Thomas Cox across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1899), then head of a 4-person household.

Age 41 b. ~1899 Male Head Born: Missouri Married

1940 Census Record Details

Census Year	1940
Location	Cook-County, Illinois
Surname	Cox
Given Name	Thomas
Relationship to Head	head
Sex	M
Color / Race	White
Age	41
Marital Status	Married
Birthplace	Missouri
1935 Residence (City)	Chicago
1935 Residence (County)	Cook
Additional Details
Occupation	automobile mechanic
Industry	automobile repairs
Class of Worker	PW
Hours Worked	52
Income (1939)	1200
Highest Grade	No 8
1935 Residence	Same place
Birth State	Missouri
Birth Country	United States
Birthplace (normalized)	missouri
Occupation	Automobile Mechanic
Township / Ward	Chicago
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.

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

Name	Relation to head	Relative to Thomas	Age	Birth yr
Thomas Cox	Son	—	18	~1922
Thomas Cox	Head	—	41	~1899
Hazel Cox	Spouse	—	39	~1901
Marilyn Cox	Daughter	—	12	~1928

Census Appearances

1920

Cook, Illinois

Other, age 21

Cook, Illinois · implied b. ~1899 — 6 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Cox
Given Name	Thomas
Relationship to Head	Boarder
Sex	M
Color / Race	White
Age	21
Marital Status	Single
Birthplace	Missouri
Father's Birthplace	Missouri
Mother's Birthplace	Missouri
Occupation	Machinist
Industry	Garage
Class of Worker	W
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Birth State	Missouri
Birth Country	United States
Birthplace (normalized)	missouri

1930

Cook, Illinois

Head, age 31

Cook, Illinois · implied b. ~1899 — 4 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Cox
Given Name	Thomas
Relationship to Head	Head
Sex	M
Color / Race	White
Age	31
Marital Status	Married
Birthplace	Missouri
Age at First Marriage	21
Father's Birthplace	Missouri
Mother's Birthplace	Missouri
Occupation	Repair Man
Industry	Automobile
Class of Worker	W
Can Read/Write	Yes
Home Owned/Rented	R
Home Value / Rent	35
Radio Set	R
Veteran	Yes WW
Birth State	Missouri
Birth Country	United States
Birthplace (normalized)	missouri

1940

Cook-County, Illinois

Head, age 41

Cook-County, Illinois · implied b. ~1899 — 4 household members

Surname	Cox
Given Name	Thomas
Relationship to Head	head
Sex	M
Color / Race	White
Age	41
Marital Status	Married
Birthplace	Missouri
1935 Residence (City)	Chicago
1935 Residence (County)	Cook
Occupation	automobile mechanic
Industry	automobile repairs
Class of Worker	PW
Hours Worked	52
Income (1939)	1200
Highest Grade	No 8
1935 Residence	Same place
Birth State	Missouri
Birth Country	United States
Birthplace (normalized)	missouri

Model Tree

Linked across censuses

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

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This person

Anchor record

Thomas Cox

Head · 1940 · age 41 · b. ~1899 · 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-t0627-00997-00820)

Line	Name	Age	Relation	Occupation	Birthplace
1	Ruth Edstrom	37	wife	Housewife	Sweden
2	Alice Edstrom	8	daughter	—	Illinois
3	Maria Wassemer	54	head	—	Germany
4	Herta Wassemer	29	daughter	Mail Clerk	New York
5	Thomas Cox THIS PERSON	41	head	Automobile Mechanic	Missouri
6	Hazel Cox	39	wife	—	Illinois
7	Thomas Jr Cox	18	son	—	Illinois
8	Marilyn Cox	12	daughter	—	Illinois
9	Rudolph Nath	36	head	Shoemaker	Germany
10	Mabel Nath	32	wife	—	Illinois
11	Rudolph Jr Nath	5	son	—	Illinois
12	Laurence Johnson	31	head	Repair Man	Norway
13	Helen Johnson	35	wife	—	Illinois
14	Frederick Ibe	49	head	Painter	Germany
15	Emma Ibe	45	wife	—	Germany
16	Henry Ibe	9	son	—	Illinois
17	Louis Edahl	57	head	—	Norway
18	Carrie Edahl	54	wife	—	Norway
19	Elmer Edahl	21	son	Part Owner	Illinois
20	Lillian Edahl	19	daughter	Beauty Operator	Illinois
21	Frank Chudy	33	head	Operator	Illinois
22	Phyllis Chudy	36	wife	Salesgirl	Illinois
23	Gustav Vorbrich	60	head	Owner	Ohio
24	Emma Vorbrich	56	wife	—	Illinois
25	Frank Waterman	68	head	Baggage Man	Ohio
26	Clara Waterman	44	wife	—	Illinois
27	Chas Huston	36	head	Clerk	Illinois
28	Ruth Huston	30	wife	Hat Repairer	Ohio
29	Betty Huston	18	daughter	—	Ohio
30	Margaret Kaiser	54	head	Manager	Germany
31	Peter E Korbakes	58	boarder	Sales Clerk	Greece
32	Wm Joachim	73	boarder	Nightclerk	Illinois
33	Joseph Wojczynski	32	head	Bookkeeper	Illinois
34	Stella Wojczynski	22	wife	—	Illinois
35	Norman Wojczynski	1	son	—	Illinois
36	Ben Fork	27	head	Foreman	Wisconsin
37	Adeline Fork	24	wife	Operator	Illinois
38	Grace Fork	21	sister	Sewing Mach Operator	Wisconsin
39	Anna Tansch	46	mother in law	—	Wisconsin
40	Clara Reese	56	head	—	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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