John Mackey — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Cook-County, Illinois

Our Model Tree links this John Mackey across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1915), then head of a 5-person household.

Age 25 b. ~1915 Male Son Born: Illinois Single

1940 Census Record Details

Census Year	1940
Location	Cook-County, Illinois
Surname	Mackey
Given Name	John
Relationship to Head	Son
Sex	M
Color / Race	White
Age	25
Marital Status	Single
Birthplace	Illinois
1935 Residence (City)	City of Chicago
1935 Residence (County)	Cook
Additional Details
Occupation	File Clerk
Industry	Newspaper
Class of Worker	PW
Hours Worked	44
Income (1939)	612
Highest Grade	No 8
1935 Residence	Same place
Birth State	Illinois
Birth Country	United States
Birthplace (normalized)	illinois
Occupation	File Clerk
Township / Ward	City Of Chicago
Est. Birth Year	~1915

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 John	Age	Birth yr
Dorothy Mackey	Spouse	—	48	~1892
John Mackey	Son	—	25	~1915
Hannah Mackey	Daughter	—	23	~1917
Margaret Mackey	Daughter	—	21	~1919
Nick Mackey	Head	—	53	~1887

Census Appearances

1930

Cook, Illinois

Son, age 14

Cook, Illinois · implied b. ~1916 — 4 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	McKay
Given Name	John
Relationship to Head	Son
Sex	M
Color / Race	White
Age	14
Marital Status	Single
Birthplace	Illinois
Father's Birthplace	Wisconsin
Mother's Birthplace	Wisconsin
Can Read/Write	Yes
Mother Tongue	English
Birth State	Illinois
Birth Country	United States
Birthplace (normalized)	illinois

1940

Cook-County, Illinois

Son, age 25

Cook-County, Illinois · implied b. ~1915 — 5 household members

Surname	Mackey
Given Name	John
Relationship to Head	Son
Sex	M
Color / Race	White
Age	25
Marital Status	Single
Birthplace	Illinois
1935 Residence (City)	City of Chicago
1935 Residence (County)	Cook
Occupation	File Clerk
Industry	Newspaper
Class of Worker	PW
Hours Worked	44
Income (1939)	612
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 John Mackey across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.

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This person

Anchor record

John Mackey

Son · 1940 · age 25 · b. ~1915 · Illinois

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Sibling

Margaret Mackey

Sibling · 1940 · age 21

Source co-child of head (derived)

● Co-child · derived · ~0.88

Sibling

Hannah Mackey

Sibling · 1940 · age 23

Source co-child of head (derived)

● Co-child · derived · ~0.88

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-t0627-00988-00286)

Line	Name	Age	Relation	Occupation	Birthplace
1	Edward Newberger	13	Head	—	Illinois
2	Cecelia Newberger	64	Wife	—	Poland
3	Cecelia Newberger	37	Wife	Typist	Illinois
4	Joseph Minuta	46	Head	Contractor	Italy
5	Ada Minuta	35	Wife	—	Italy
6	Alexander Minuta	17	Son	—	Illinois
7	Robert Minuta	14	Son	—	Illinois
8	Violet Schuetz	47	Head	—	Illinois
9	Elythe Schuetz	16	Daughter	—	Illinois
10	Michael Schuetz	13	Son	—	Illinois
11	Steve Bejczyk	47	Head	Contractor	Poland
12	Mary Bejczyk	44	Wife	Hostess	Poland
13	Nick Mackey	53	Head	Tailor	Russia
14	Dorothy Mackey	48	Wife	—	Russia
15	John Mackey THIS PERSON	25	Son	File Clerk	Illinois
16	Hannah Mackey	23	Daughter	Sales Clerk	Illinois
17	Margaret Mackey	21	Daughter	Grader	Louisiana
18	Jack Kolinen	34	Head	Salesman	Michigan
19	Clara Kolinen	30	Wife	Bookkeeper	Illinois
20	Charles Kolinen	6	Son	—	Illinois
21	Carolyn Kolinen	3	Daughter	—	Illinois
22	Abel Kolinen	61	Father	Maintenance	Finland
23	Ole Lindor	58	Head	Painter	Norway
24	Elvisa Lindor	51	Wife	—	Sweden
25	Elvira Lindor	26	Daughter	Sales Clerk	Illinois
26	Walter Tukibauch	53	Head	Maintenance Man	Poland
27	Mary Tukibauch	46	Wife	—	Poland
28	Joseph Tukibauch	16	Son	—	Illinois
29	Joseph Bellock	48	Head	Chauffeur	Illinois
30	Maude Bellock	47	Wife	—	Illinois
31	Florian Bellock	23	Son	Shoe Salesman	Illinois
32	Edmund Skierniowski	34	Head	Mail Carrier	Illinois
33	Josephine Skierniowski	26	Wife	—	Illinois
34	Dolores Skierniowski	7	Daughter	—	Illinois
35	Martha Burns	46	Head	Seamstress	Illinois
36	William Viktorowski	51	Head	Fireman	Illinois
37	Nellie Viktorowski	53	Wife	Seamstress	Illinois
38	Edward Viktorowski	30	Son	Chauffeur	Wisconsin
39	William Viktorowski	9	Grandson	—	Illinois
40	Constance Matuszak	43	Sister in Law	Milliner	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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