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John Mack — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Erie-County, New York

Our Model Tree links this John Mack across the 1930 and 1940 US Censuses in Erie-County, New York (XGBoost, ~Confirmed) — first a son (b.~1910), then head of a 9-person household.

Age 30 b. ~1910 Male Son Born: New York Single

1940 Census Record Details

Census Year	1940
Location	Erie-County, New York
Surname	Mack
Given Name	John
Relationship to Head	son
Sex	M
Color / Race	White
Age	30
Marital Status	Single
Birthplace	New York
1935 Residence (City)	Buffalo city
1935 Residence (County)	Erie
Additional Details
Occupation	bookkeeper
Class of Worker	PW
Hours Worked	416
Highest Grade	Hs 4
1935 Residence	Same house
Birth State	New York
Birth Country	United States
Birthplace (normalized)	new york
Occupation	Bookkeeper
Township / Ward	Buffalo City
Est. Birth Year	~1910

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.

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

Name	Relation to head	Relative to John	Age	Birth yr
Joseph Mack	Son	—	48	~1892
John Mack	Son	—	30	~1910
Constance Mack	Daughter	—	33	~1907
Frances Mack	Head	—	70	~1870
Stephen Mack	Son	—	35	~1905
Casimer Mack	Son	—	47	~1893
Anna Mack	Daughter	—	36	~1904
Francis Mack	Son	—	42	~1898
Anthony Mack	Son	—	40	~1900

Census Appearances

1930

Erie, New …

Son, age 20

Erie, New York · implied b. ~1910 — 8 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Mack
Given Name	John
Relationship to Head	Son
Sex	M
Color / Race	White
Age	20
Marital Status	Single
Birthplace	New York
Father's Birthplace	Poland
Mother's Birthplace	Poland
Can Read/Write	Yes
Birth State	New York
Birth Country	United States
Birthplace (normalized)	new york

1940

Erie-County, New …

Son, age 30

Erie-County, New York · implied b. ~1910 — 9 household members

Surname	Mack
Given Name	John
Relationship to Head	son
Sex	M
Color / Race	White
Age	30
Marital Status	Single
Birthplace	New York
1935 Residence (City)	Buffalo city
1935 Residence (County)	Erie
Occupation	bookkeeper
Class of Worker	PW
Hours Worked	416
Highest Grade	Hs 4
1935 Residence	Same house
Birth State	New York
Birth Country	United States
Birthplace (normalized)	new york

Model Tree

Linked across censuses

Our Model Tree links John Mack across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.

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This person

Anchor record

John Mack

Son · 1940 · age 30 · b. ~1910 · New York

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Sibling

Joseph Mack

Sibling · 1940 · age 48

Source co-child of head (derived)

● Co-child · derived · ~0.88

Sibling

Anthony Mack

Sibling · 1940 · age 40

Source co-child of head (derived)

● Co-child · derived · ~0.88

Sibling

Constance Mack

Sibling · 1940 · age 33

Source co-child of head (derived)

● Co-child · derived · ~0.88

Sibling

Anna Mack

Sibling · 1940 · age 36

Source co-child of head (derived)

● Co-child · derived · ~0.88

Sibling

Stephen Mack

Sibling · 1940 · age 35

Source co-child of head (derived)

● Co-child · derived · ~0.88

Sibling

Casimer Mack

Sibling · 1940 · age 47

Source co-child of head (derived)

● Co-child · derived · ~0.88

Sibling

Francis Mack

Sibling · 1940 · age 42

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 — Erie-County, New York Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-02829-00092)

Line	Name	Age	Relation	Occupation	Birthplace
1	Frank Jr Stallman	1	son	—	New York
2	Joseph Wasielewski	49	head	Packer	Poland
3	Stella Wasielewski	46	wife	—	New York
4	Teddy Ab Wasielewski	19	son	—	New York
5	Edmund Wasielewski	15	son	—	New York
6	Arthur Wasielewski	12	son	—	New York
7	Joseph Szymczyk	24	son-in-law	Grinder	New York
8	Florence Szymczyk	22	daughter	—	New York
9	Sisfria Szymczyk	0	daughter	—	New York
10	Stanley Senger	42	head	Pipe Fitter	New York
11	Anna Senger	41	wife	—	New York
12	Angeline Senger	18	daughter	Maker Of Plastic Boxes	New York
13	Steve Furmanek	39	head	Heat Treating	New York
14	Stella Furmanek	34	wife	Maid	New York
15	Leonard Furmanek	6	son	—	New York
16	Rose Marie Furmanek	3	daughter	—	New York
17	Frances Mack	70	head	—	Poland
18	Joseph Mack	48	son	—	New York
19	Casimer Mack	47	son	Painter	New York
20	Francis Mack	42	son	Mailman	New York
21	Anthony Mack	40	son	—	New York
22	Anna Mack	36	daughter	Wrapper	New York
23	Stephen Mack	35	son	Painter	New York
24	Constance Mack	33	daughter	Comptometer	New York
25	John Mack THIS PERSON	30	son	Bookkeeper	New York
26	Valentine Brink	82	head	—	Poland
27	Petranella Brink	72	wife	—	Poland
28	Vincent Brink	42	son	Auto Mechanic	New York
29	Martha Brink	35	daughter	Machine Operator	New York
30	Angeline Flannigan	32	daughter	Machine Operator	New York
31	Ronald Flannigan	9	grandson	—	New York
32	Steve Wlosinski	24	head	Runner Man	New York
33	Clara Wlosinski	22	wife	Sausage Linker	New York
34	Marian Frances Wlosinski	2	son	—	New York
35	John Polak	55	head	Core Maker	Poland
36	Helen Polak	21	daughter	Clerk	New York
37	Matthew Polak	17	son	—	New York
38	John Pawlik	52	head	Painter	Poland
39	Mary Pawlik	52	wife	—	New York
40	Adolph Pawlik	20	son	New Worker	New York

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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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