Mary Kowalski — 1940 US Census Record

Linked across censuses

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

Our Model Tree links this Mary Kowalski across the 1920, 1930 and 1940 US Censuses in Erie-County, New York (XGBoost, ~Confirmed) — first a spouse (b.~1894), then head of a 9-person household.

Age 46 b. ~1894 Female Spouse Born: Austria Married

1940 Census Record Details

Census Year	1940
Location	Erie-County, New York
Surname	Kowalski
Given Name	Mary
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	46
Marital Status	Married
Birthplace	Austria
1935 Residence (City)	Buffalo
1935 Residence (County)	Erie
Naturalization Status	Naturalized
Additional Details
Income (1939)	0
Highest Grade	No 8
1935 Residence	Same place
Birth Country	Austria
Birthplace (normalized)	austria
Township / Ward	Buffalo
Est. Birth Year	~1894

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 Mary	Age	Birth yr
Mary Kowalski	Spouse	—	46	~1894
Michael Kowalski	Son	—	10	~1930
Michael Kowalski	Head	—	47	~1893
Louis Kowalski	Son	—	18	~1922
John Kowalski	Son	—	20	~1920
Helen Kowalski	Daughter	—	6	~1934
Mary Kowalski	Daughter	—	22	~1918
Catherine Kowalski	Daughter	—	13	~1927
Ann Kowalski	Daughter	—	15	~1925

Census Appearances

1920

Monroe, New …

Spouse, age 27

Monroe, New York · implied b. ~1893 — 3 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Kowalski
Given Name	Mary
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	27
Marital Status	Married
Birthplace	Austria
Year of Immigration	1913
Naturalization Status	Alien
Father's Birthplace	Austria
Mother's Birthplace	Austria
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Mother Tongue	Ruthenian
Birth Country	Austria
Birthplace (normalized)	austria

1930

Genesee, New …

Spouse, age 36

Genesee, New York · implied b. ~1894 — 5 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Kowalski
Given Name	Mary
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	36
Marital Status	Married
Birthplace	Austria
Naturalization Status	Naturalized
Year of Immigration	1913
Age at First Marriage	26
Father's Birthplace	Austria
Mother's Birthplace	Austria
Can Read/Write	Yes
Mother Tongue	Polish
Birth Country	Austria
Birthplace (normalized)	austria

1940

Erie-County, New …

Spouse, age 46

Erie-County, New York · implied b. ~1894 — 9 household members

Surname	Kowalski
Given Name	Mary
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	46
Marital Status	Married
Birthplace	Austria
1935 Residence (City)	Buffalo
1935 Residence (County)	Erie
Naturalization Status	Naturalized
Income (1939)	0
Highest Grade	No 8
1935 Residence	Same place
Birth Country	Austria
Birthplace (normalized)	austria

Model Tree

Linked across censuses

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

Show:

This person

Anchor record

Mary Kowalski

Spouse · 1940 · age 46 · b. ~1894 · New York

★ You are viewing this record

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-t0627-02827-00646)

Line	Name	Age	Relation	Occupation	Birthplace
1	Helen Klaska	31	Wife	—	New York
2	Elmer Klaska	27	Brother	Weighman	New York
3	John Jaskiewicz	56	Head	Brakeman	New York
4	Mary Jaskiewicz	54	Wife	—	New York
5	Raymond Jaskiewicz	18	Son	Sign Maker	New York
6	Alfred Jaskiewicz	22	Son	Laborer	New York
7	Helen Jaskiewicz	22	Daughter	Dental Assistant	New York
8	Edward Gatza	37	Head	Laborer	New York
9	Wanda Gatza	33	Wife	—	New York
10	Donald Gatza	6	Son	—	New York
11	William Gorski	34	Head	Truck Driver	New York
12	Henry Gorski	18	Brother	New Worker	New York
13	Janet Gorski	15	Sister	New Worker	New York
14	Floyd Kieffer	21	Head	Carman Helper	New York
15	Marie Kieffer	26	Wife	—	New York
16	Dolores Kieffer	6	Daughter	—	New York
17	Elizabeth Kieffer	4	Daughter	—	New York
18	Clifford Thomas	28	Head	Manager	Pennsylvania
19	Julia Thomas	27	Wife	—	Pennsylvania
20	Jean Thomas	6	Daughter	—	New York
21	Clifford Thomas	4	Son	—	New York
22	John Thomas	70	Father	—	Pennsylvania
23	Otto Radke	55	Head	Press Hand	Germany
24	Augusta Radke	52	Wife	—	Germany
25	Florence Radke	28	Daughter	Biller	New York
26	Raymond Radke	18	Son	Painter	New York
27	Gottlieba Piontek	84	Mother	—	Germany
28	Michael Kowalski	47	Head	Foreman	Austria
29	Mary Kowalski THIS PERSON	46	Wife	—	Austria
30	Mary Kowalski	22	Daughter	Waitress	Kansas
31	John Kowalski	20	Son	Assembler	New York
32	Louis Kowalski	18	Son	Apprentice Painter	New York
33	Ann Kowalski	15	Daughter	New Worker	New York
34	Catherine Kowalski	13	Daughter	—	New York
35	Michael Kowalski	10	Son	—	New York
36	Helen Kowalski	6	Daughter	—	New York
37	Frank Dranrocki	47	Head	Chipper	Poland
38	Mary Dranrocki	42	Wife	—	New York
39	Jane Dranrocki	17	Daughter	New Worker	New York
40	Bernice Dranrocki	14	Daughter	New Worker	New York

Search for Mary Kowalski

All Mary Kowalski Census Records Discover Kowalski Family Tree

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)

Report inaccurate data