Mary Greer — 1940 US Census Record

Linked across censuses

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

Our Model Tree links this Mary Greer across the 1930 and 1940 US Censuses in Queens-County, New York (XGBoost, ~Confirmed) — first a daughter (b.~1917), then head of a 5-person household.

Age 23 b. ~1917 Female Daughter Born: New York Single

1940 Census Record Details

Census Year	1940
Location	Queens-County, New York
Surname	Greer
Given Name	Mary Isabel
Relationship to Head	Daughter
Sex	F
Color / Race	White
Age	23
Marital Status	Single
Birthplace	New York
1935 Residence (City)	New York
1935 Residence (County)	Queens
Additional Details
Occupation	Salesgirl
Industry	Department store
Class of Worker	PW
Hours Worked	45
Income (1939)	936
Highest Grade	H-4
1935 Residence	Same place
Birth State	New York
Birth Country	United States
Birthplace (normalized)	new york
Occupation	Salesgirl
Township / Ward	New York
Est. Birth Year	~1917

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 Mary	Age	Birth yr
William Greer	Son	—	12	~1928
John Greer	Head	—	48	~1892
Mary Greer	Daughter	—	23	~1917
Mary Greer	Spouse	—	48	~1892
Sara Greer	Daughter	—	17	~1923

Census Appearances

1930

New York, …

Other, age 12

New York, New York · implied b. ~1918 — 9 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Grier
Given Name	Margaret
Relationship to Head	Niece
Sex	F
Color / Race	Black
Age	12
Marital Status	Single
Birthplace	New York
Father's Birthplace	Georgia
Mother's Birthplace	Georgia
Can Read/Write	Yes
Birth State	New York
Birth Country	United States
Birthplace (normalized)	new york

1940

Queens-County, New …

Daughter, age 23

Queens-County, New York · implied b. ~1917 — 5 household members

Surname	Greer
Given Name	Mary Isabel
Relationship to Head	Daughter
Sex	F
Color / Race	White
Age	23
Marital Status	Single
Birthplace	New York
1935 Residence (City)	New York
1935 Residence (County)	Queens
Occupation	Salesgirl
Industry	Department store
Class of Worker	PW
Hours Worked	45
Income (1939)	936
Highest Grade	H-4
1935 Residence	Same place
Birth State	New York
Birth Country	United States
Birthplace (normalized)	new york

Model Tree

Linked across censuses

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

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This person

Anchor record

Mary Greer

Daughter · 1940 · age 23 · b. ~1917 · New York

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Sibling

William Greer

Sibling · 1940 · age 12

Source co-child of head (derived)

● Co-child · derived · ~0.88

Sibling

Sara Greer

Sibling · 1940 · age 17

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 — Queens-County, New York Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-02725-00024)

Line	Name	Age	Relation	Occupation	Birthplace
41	Allen Venn	42	Head	Watch Maker	New York
42	Nellie Venn	42	Wife	—	Pennsylvania
43	Lillian Venn	17	Daughter	—	New York
44	Louis Bohmann	34	Head	Radio Technician	New York
45	Helen Bohmann	32	Wife	—	New York
46	Joan Bohmann	10	Daughter	—	New York
47	Margaret Bohmann	3	Daughter	—	New York
48	James Petrich	40	Head	Doorman	Hungary
49	Marie Petrich	43	Wife	—	Pennsylvania
50	Harry J. Petrich	20	Son	—	New York
51	Eleanor Petrich	19	Daughter	Stenographer	New York
52	Charles Johnson	39	Head	Handyman	Sweden
53	Ethel Johnson	37	Wife	Maid	New York
54	David Mcauley	38	Head	Claim Adjuster	Eire
55	Bessie Mcauley	36	Wife	—	Eire
56	Margaret Mcauley	10	Daughter	—	New York
57	Roslyn Mcauley	6	Daughter	—	New York
58	Doris O'Hara	41	Head	Secretary	New York
59	John O'Hara	18	Son	Office Boy	New York
60	Jean O'Hara	15	Daughter	—	New York
61	Joseph Jacob	33	Head	Attendant	New York
62	Charlotte Jacob	33	Wife	—	New York
63	Irene Jacob	5	Daughter	—	New York
64	Ella D. Mcmahon	37	Head	Office Girl	New York
65	William Burke	45	Head	Porter	Eire
66	Bridget Burke	44	Wife	Waitress	Eire
67	Anthony Buono	43	Head	Salesman	Italy
68	Jennie Buono	41	Wife	—	New York
69	Expedito Buono	21	Son	Errand Boy	New York
70	John J. Greer	48	Head	Doorman	New York
71	Mary June Greer	48	Wife	—	England
72	Mary Isabel Greer THIS PERSON	23	Daughter	Salesgirl	New York
73	Sara Beatrice Greer	17	Daughter	Salesgirl	New York
74	William Greer	12	Son	—	New York
75	William Harris	29	Head	Traffic Manager	New York
76	Lillian Harris	27	Wife	—	New York
77	Joseph Flanagan	33	Head	Electrician	New York
78	Jessie Flanagan	30	Wife	—	New York
79	George Flanagan	5	Son	—	New York
80	Andrew Capozzi	44	Head	Tailor	Italy

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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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