Mary Baldwin — 1940 US Census Record

Linked across censuses

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

Our Model Tree links this Mary Baldwin across the 1920, 1930 and 1940 US Censuses in Nassau-County, New York (XGBoost, ~Confirmed) — first a head (b.~1868), then head of a 6-person household.

Age 72 b. ~1868 Female Head Born: New York Widowed

1940 Census Record Details

Census Year	1940
Location	Nassau-County, New York
Surname	Baldwin
Given Name	Mary
Relationship to Head	Head
Sex	F
Color / Race	White
Age	72
Marital Status	Widowed
Birthplace	New York
1935 Residence (City)	Uninc. Uniondale
1935 Residence (County)	Nassau
Additional Details
Highest Grade	No 8
1935 Residence	Same house
Birth State	New York
Birth Country	United States
Birthplace (normalized)	new york
Township / Ward	Uninc Uniondale
Est. Birth Year	~1868

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.

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

Name	Relation to head	Relative to Mary	Age	Birth yr
Emily Idell	Daughter	—	33	~1907
Mary Baldwin	Head	—	72	~1868
Elizabeth Idell	Other	—	7	~1933
Joseph Idell	Other	—	10	~1930
Joseph Idell	Other	—	42	~1898
Gloria Idell	Other	—	2	~1938

Census Appearances

1920

Nassau, New …

Spouse, age 52

Nassau, New York · implied b. ~1868 — 6 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Baldwin
Given Name	Mary
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	52
Marital Status	Married
Birthplace	New York
Father's Birthplace	New York
Mother's Birthplace	New York
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Birth State	New York
Birth Country	United States
Birthplace (normalized)	new york

1930

Nassau, New …

Head, age 64

Nassau, New York · implied b. ~1866 — 3 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Baldwin
Given Name	Mary
Relationship to Head	Head
Sex	F
Color / Race	White
Age	64
Marital Status	Widowed
Birthplace	New York
Age at First Marriage	25
Father's Birthplace	New York
Mother's Birthplace	New York
Can Read/Write	Yes
Home Owned/Rented	O
Home Value / Rent	5000
Radio Set	R
Birth State	New York
Birth Country	United States
Birthplace (normalized)	new york

1940

Nassau-County, New …

Head, age 72

Nassau-County, New York · implied b. ~1868 — 6 household members

Surname	Baldwin
Given Name	Mary
Relationship to Head	Head
Sex	F
Color / Race	White
Age	72
Marital Status	Widowed
Birthplace	New York
1935 Residence (City)	Uninc. Uniondale
1935 Residence (County)	Nassau
Highest Grade	No 8
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 Mary Baldwin across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.

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This person

Anchor record

Mary Baldwin

Head · 1940 · age 72 · b. ~1868 · New York

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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 — Nassau-County, New York Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-02687-00656)

Line	Name	Age	Relation	Occupation	Birthplace
1	Edward E. Erbeck	42	Head	Private Chauffeur	New Jersey
2	Mary Erbeck	43	Wife	—	New York
3	Mary L. Erbeck	17	Daughter	—	New Jersey
4	Ralph Oehler	23	Head	Machinist	New York
5	Mary Oehler	27	Wife	Office Clerk	New York
6	Joseph Mankawich	32	Head	Bus Driver	New York
7	Alma Mankawich	29	Wife	Bookkeeper	New York
8	Joan Mankawich	3	Daughter	—	New York
9	Joseph Guida	29	Head	Shipping Clerk	New York
10	Mary Guida	23	Wife	—	Detroit
11	Joseph Guida	1	Son	—	New York
12	Mary Baldwin THIS PERSON	72	Head	—	New York
13	Emily Idell	33	Daughter	—	New York
14	Joseph Idell	42	Son-in-law	Mechanic	Kentucky
15	Joseph, Jr. Idell	10	Grandson	—	New York
16	Elizabeth Idell	7	Granddaughter	—	New York
17	Gloria Idell	2	Granddaughter	—	New York
18	Lloyd Brown	45	Head	Purchasing Agent	New York
19	Jessie Brown	47	Wife	—	New York
20	James Brown	19	Son	—	New Jersey
21	George Brown	17	Son	—	New Jersey
22	Agnes Brown	16	Daughter	—	New York
23	Kathleen Brown	14	Daughter	—	New York
24	Margaret Mule	37	Head	—	Italy
25	Grace Mule	7	Daughter	—	New York
26	Andrew Mule	5	Son	—	New York
27	Mary Anna Brown	59	Head	Domestic	New York
28	Otto Botech	67	Head	Farmer	Germany
29	Pauline Botech	65	Wife	—	New York
30	Ralph Botech	5	Grandson	—	New York
31	Shirley Botech	5	Granddaughter	—	New York
32	Michael Kiarych	44	Head	Carpenter	Russia
33	Victoria Kiarych	43	Wife	—	Russia
34	Stephanie Kiarych	23	Daughter	Stenographer	New York
35	Mary Kiarych	21	Daughter	Assistant	New York
36	Andrew Kiarych	14	Son	—	New York
37	William Kiarych	13	Son	—	New York
38	Jean Ann Kiarych	11	Daughter	—	New York
39	Walter Kiarych	9	Son	—	New York
40	Francis Walters	52	Head	Farmer	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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