John Schaffer — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Cook-County, Illinois

Our Model Tree links this John Schaffer across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1896), then head of a 4-person household.

Age 44 b. ~1896 Male Head Born: Austria Married

1940 Census Record Details

Census Year	1940
Location	Cook-County, Illinois
Surname	Schaffer
Given Name	John Sr.
Relationship to Head	Head
Sex	M
Color / Race	White
Age	44
Marital Status	Married
Birthplace	Austria
1935 Residence (City)	Chicago City
1935 Residence (County)	Cook
Naturalization Status	Naturalized
Additional Details
Occupation	Janitor
Industry	Public Library
Class of Worker	PW
Hours Worked	40
Income (1939)	2000
Highest Grade	No 8
1935 Residence	Same place
Birth Country	Austria
Birthplace (normalized)	austria
Occupation	Janitor
Township / Ward	Chicago City
Est. Birth Year	~1896

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.

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

Name	Relation to head	Relative to John	Age	Birth yr
John Schaffer	Son	—	16	~1924
Anna Schaffer	Spouse	—	34	~1906
John Schaffer	Head	—	44	~1896
Adelaide Ross	Other	—	67	~1873

Census Appearances

1920

Cook, Illinois

Other, age 24

Cook, Illinois · implied b. ~1896 — 6 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Schafer
Given Name	John
Relationship to Head	Brother-in-law
Sex	M
Color / Race	White
Age	24
Marital Status	Single
Birthplace	Austria
Year of Immigration	1913
Naturalization Status	Naturalized
Father's Birthplace	Austria
Mother's Birthplace	Austria
Occupation	Laborer
Industry	Machine Shop
Class of Worker	W
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Mother Tongue	German
Birth Country	Austria
Year of Naturalization	1918
Birthplace (normalized)	austria

1930

Cook, Illinois

Head, age 34

Cook, Illinois · implied b. ~1896 — 4 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Schaffer
Given Name	John
Relationship to Head	Head
Sex	M
Color / Race	White
Age	34
Marital Status	Married
Birthplace	Austria
Naturalization Status	Naturalized
Year of Immigration	1913
Age at First Marriage	21
Father's Birthplace	Austria
Mother's Birthplace	Austria
Occupation	Bricklayer
Industry	Construction
Class of Worker	W
Can Read/Write	Yes
Mother Tongue	Magyar
Home Owned/Rented	O
Home Value / Rent	7000
Radio Set	R
Veteran	Yes
Birth Country	Austria
Birthplace (normalized)	austria

1940

Cook-County, Illinois

Head, age 44

Cook-County, Illinois · implied b. ~1896 — 4 household members

Surname	Schaffer
Given Name	John Sr.
Relationship to Head	Head
Sex	M
Color / Race	White
Age	44
Marital Status	Married
Birthplace	Austria
1935 Residence (City)	Chicago City
1935 Residence (County)	Cook
Naturalization Status	Naturalized
Occupation	Janitor
Industry	Public Library
Class of Worker	PW
Hours Worked	40
Income (1939)	2000
Highest Grade	No 8
1935 Residence	Same place
Birth Country	Austria
Birthplace (normalized)	austria

Model Tree

Linked across censuses

Our Model Tree links John Schaffer across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.

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This person

Anchor record

John Schaffer

Head · 1940 · age 44 · b. ~1896 · Illinois

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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 — Cook-County, Illinois Open full size

Page Contents

38 people indexed on this census page (nara:1940:m-t0627-00932-00356)

Line	Name	Age	Relation	Occupation	Birthplace
1	Anita Costa	0	Daughter	—	Indiana
2	John Sr. Schaffer THIS PERSON	44	Head	Janitor	Austria
3	Anna Schaffer	34	Wife	—	Austria
4	John Jr. Schaffer	16	Son	—	Illinois
5	Adelaide Ross	67	Mother-in-law	—	Illinois
6	Frank Werler	45	Head	Fitter	Illinois
7	Grace Werler	44	Wife	—	Illinois
8	Frank Jr. Werler	15	Son	—	Illinois
9	Glenn Loveland	52	Head	Saleslady	Illinois
10	Zoe Loveland	80	Mother	—	Illinois
11	Elizabeth Spencer	48	Head	Teacher	Illinois
12	Madge Ackley	39	Head	Secretary	Wisconsin
13	William E. Jones	33	Head	Attorney	Michigan
14	Francis B. Jones	30	Wife	—	Tennessee
15	Raymond Ostrander	49	Head	Mechanical Engineer	Indiana
16	Ada H. Ostrander	44	Wife	—	Illinois
17	Mabel Armstrong	58	Sister	—	Indiana
18	Mitchel Moore	42	Head	Auto Mechanic	Iowa
19	Marjorie Moore	34	Wife	Maid	Iowa
20	Bill C. Moore	16	Son	—	Iowa
21	Ella Lightfoot	65	Head	Bookkeeper	Illinois
22	Louise J. Lightfoot	87	Mother	—	Illinois
23	Margaret Sirova	26	Head	Cashier	Hungary
24	Herbert Hancock	56	Head	Sales Manager	Illinois
25	Florence Hancock	51	Wife	—	Illinois
26	Louis G. Devereaux	46	Head	Salesman	Nebraska
27	Lillian M. Devereaux	41	Wife	Bookkeeper	Illinois
28	Eugene Hart	37	Head	Chauffeur	Ohio
29	Agnes Hart	38	Wife	—	Wisconsin
30	Genevieve Stephenson	31	Head	Operator	Illinois
31	Virginia Melscat	33	Head	Clerk	Wisconsin
32	Shirley Melscat	15	Daughter	—	Illinois
33	Margaret Redelberger	42	Head	Stenographer	Ohio
34	Amelia Redelberger	70	Mother	—	Indiana
35	John E. Mcclung	34	Head	Salesman	Illinois
36	Helen G. Mcclung	40	Wife	—	Illinois
37	Sidney B. Mcclung	22	Son	Clerk	Wisconsin
38	Gertraine Baril	42	Head	Stenographer	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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