Mary Koch — 1940 US Census Record

Linked across censuses

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

Our Model Tree links this Mary Koch across the 1930 and 1940 US Censuses in Onondaga-County, New York (XGBoost, ~Confirmed) — first a spouse (b.~1897), then head of a 6-person household.

Age 43 b. ~1897 Female Spouse Born: Czechoslovakia Married

1940 Census Record Details

Census Year	1940
Location	Onondaga-County, New York
Surname	Koch
Given Name	Mary
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	43
Marital Status	Married
Birthplace	Czechoslovakia
1935 Residence (City)	Camillus Village
1935 Residence (County)	Onondaga
Naturalization Status	Naturalized
Additional Details
Occupation	Helper
Industry	Store
Class of Worker	NP
Hours Worked	50
Highest Grade	8
1935 Residence	Same place
Birth Country	Czechoslovakia
Birthplace (normalized)	czechoslovakia
Occupation	Helper
Township / Ward	Camillus Village
Est. Birth Year	~1897

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
Joseph Koch	Head	—	47	~1893
Joseph Koch	Son	—	22	~1918
Mary Koch	Spouse	—	43	~1897
Marcia Koch	Daughter	—	12	~1928
Eleanor Koch	Daughter	—	20	~1920
Edward Koch	Son	—	30	~1910

Census Appearances

1930

Onondaga, New …

Spouse, age 32

Onondaga, New York · implied b. ~1898 — 4 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Koch
Given Name	Mary
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	32
Marital Status	Married
Birthplace	Czechoslovakia
Naturalization Status	First papers filed
Year of Immigration	1913
Age at First Marriage	15
Father's Birthplace	Czechoslovakia
Mother's Birthplace	Czechoslovakia
Can Read/Write	Yes
Mother Tongue	German
Birth Country	Czechoslovakia
Birthplace (normalized)	czechoslovakia

1940

Onondaga-County, New …

Spouse, age 43

Onondaga-County, New York · implied b. ~1897 — 6 household members

Surname	Koch
Given Name	Mary
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	43
Marital Status	Married
Birthplace	Czechoslovakia
1935 Residence (City)	Camillus Village
1935 Residence (County)	Onondaga
Naturalization Status	Naturalized
Occupation	Helper
Industry	Store
Class of Worker	NP
Hours Worked	50
Highest Grade	8
1935 Residence	Same place
Birth Country	Czechoslovakia
Birthplace (normalized)	czechoslovakia

Model Tree

Linked across censuses

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

Show:

This person

Anchor record

Mary Koch

Spouse · 1940 · age 43 · b. ~1897 · 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 — Onondaga-County, New York Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-02703-00019)

Line	Name	Age	Relation	Occupation	Birthplace
41	Harrison Dann	47	Head	Superintendent	Pennsylvania
42	Helen Dann	37	Wife	Stenographer	New York
43	John Dann	15	Son	—	New York
44	Harrison Jr. Dann	9	Son	—	New York
45	Henry Grieshaber	57	Head	Cutler	Germany
46	Elise Grieshaber	52	Wife	—	Germany
47	Helga Grieshaber	29	Daughter	Laborer	Germany
48	Gunter Grieshaber	25	Son	Toolmaker	Germany
49	Gerd Grieshaber	20	Son	Glazer	Germany
50	William J. Maxwell	67	Head	—	New York
51	Mary E. Maxwell	63	Wife	Music Teacher	English
52	Evelyn Rich	26	Boarder	Teacher	New York
53	Rhea B. Merriam	24	Boarder	Teacher	New York
54	Maryette Wallace	23	Boarder	Teacher	New York
55	Harry Abell	48	Head	Contractor	Pennsylvania
56	Grace Abell	49	Wife	—	New York
57	William Kelsey	63	Boarder	Laborer	New York
58	Louise Yerden	41	Head	Kitchen Helper	New York
59	John Yerden	15	Son	—	New York
60	Carl Ross	40	Head	Laborer	New York
61	Mildred Ross	30	Wife	—	New York
62	Gerald Ross	5	Son	—	New York
63	Jessie Shepard	77	Head	—	New York
64	Mary Burke	55	Partner	Teacher	New York
65	Lulu Fenn	59	Head	—	New York
66	Edwina Paddock	46	Sister	—	New York
67	Stanley Thomsen	30	Head	Doctor	New York
68	Celia Thomsen	31	Wife	Nurse	New York
69	Patricia J. Thomsen	6	Daughter	—	New York
70	John Waterman	44	Father-in-law	Laborer	Iowa
71	Estelle Waterman	50	Mother-in-law	—	New York
72	Roland Powers	55	Head	Meat Cutter	New York
73	Elizabeth Powers	49	Wife	—	New York
74	Robert E. Powers	20	Son	Research Chemistry	New York
75	Joseph Koch	47	Head	Stockman	Czechoslovakia
76	Mary Koch THIS PERSON	43	Wife	Helper	Czechoslovakia
77	Edward Koch	30	Son	Laborer	New York
78	Joseph Koch	22	Son	Laborer	New York
79	Eleanor Koch	20	Daughter	—	New York
80	Marcia A. Koch	12	Daughter	—	New York

Search for Mary Koch

All Mary Koch Census Records Discover Koch 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