Frederick Johnson — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Cook-County, Illinois

Our Model Tree links this Frederick Johnson across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1890), then head of a 4-person household.

Age 50 b. ~1890 Male Head Born: Iowa Married

1940 Census Record Details

Census Year	1940
Location	Cook-County, Illinois
Surname	Johnson
Given Name	Frederick B
Relationship to Head	Head
Sex	M
Color / Race	White
Age	50
Marital Status	Married
Birthplace	Iowa
1935 Residence (City)	Chicago City
1935 Residence (County)	Cook
Additional Details
Occupation	Engineer
Industry	Electric Co
Class of Worker	PW
Hours Worked	40
Income (1939)	5000
Highest Grade	Hs 4
1935 Residence	Same House
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa
Occupation	Engineer
Township / Ward	Chicago City
Est. Birth Year	~1890

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 Frederick	Age	Birth yr
Richard Johnson	Son	—	24	~1916
Jane Johnson	Spouse	—	48	~1892
Marion Johnson	Daughter	—	18	~1922
Frederick Johnson	Head	—	50	~1890

Census Appearances

1920

Cook, Illinois

Head, age 30

Cook, Illinois · implied b. ~1890 — 3 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Johnson
Given Name	Frederick
Relationship to Head	Head
Sex	M
Color / Race	White
Age	30
Marital Status	Married
Birthplace	Iowa
Father's Birthplace	Pennsylvania
Mother's Birthplace	Minnesota
Occupation	Salesman
Industry	C. Elson Co.
Class of Worker	W
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Home Owned/Rented	R
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa

1930

Cook, Illinois

Head, age 40

Cook, Illinois · implied b. ~1890 — 5 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Johnson
Given Name	Frederick B
Relationship to Head	Head
Sex	M
Color / Race	White
Age	40
Marital Status	Married
Birthplace	Iowa
Age at First Marriage	25
Father's Birthplace	Pennsylvania
Mother's Birthplace	Minnesota
Occupation	Engineer
Industry	Electrical
Class of Worker	W
Can Read/Write	Yes
Home Owned/Rented	O
Home Value / Rent	9000
Radio Set	R
Veteran	No
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa

1940

Cook-County, Illinois

Head, age 50

Cook-County, Illinois · implied b. ~1890 — 4 household members

Surname	Johnson
Given Name	Frederick B
Relationship to Head	Head
Sex	M
Color / Race	White
Age	50
Marital Status	Married
Birthplace	Iowa
1935 Residence (City)	Chicago City
1935 Residence (County)	Cook
Occupation	Engineer
Industry	Electric Co
Class of Worker	PW
Hours Worked	40
Income (1939)	5000
Highest Grade	Hs 4
1935 Residence	Same House
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa

Model Tree

Linked across censuses

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

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This person

Anchor record

Frederick Johnson

Head · 1940 · age 50 · b. ~1890 · 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-t0627-01000-00378)

Line	Name	Age	Relation	Occupation	Birthplace
2	Frederick B Johnson THIS PERSON	50	Head	Engineer	Iowa
3	Jane Johnson	48	Wife	—	New York
4	Richard Johnson	24	Son	Engineer	Illinois
5	Marion Johnson	18	Daughter	—	Illinois
6	Ida Ruge	68	Head	—	Illinois
7	Carl Ruge	33	Son	Painter	Illinois
8	Paul F Ruge	30	Son	Painter	Illinois
9	Wilhelmina Hulke	95	Mother	—	Germany
10	Emma Hulke	72	Sister	—	Illinois
11	Trygve Reed	44	Head	Cartage Contractor	Illinois
12	Alyce Reed	40	Wife	—	Illinois
13	Jack Reed	17	Son	—	Illinois
14	Douglas Reed	14	Son	—	Illinois
15	Louise Treadwell	60	Head	—	New York
16	George Treadwell	29	Son	Clerk	New York
17	Earl Bouilly	30	Son-in-Law	Clerk	Illinois
18	Lois Bouilly	29	Wife	Teacher	Illinois
19	Hugo Stempel	68	Head	Merchant	Illinois
20	Mary E Stempel	61	Wife	—	New York
21	John Bombara	59	Lodger	—	Illinois
22	Pauline Bremel	32	Head	—	Texas
23	Gretchen Bremel	8	Daughter	—	California
24	John Young	35	Lodger	Salesman	Pennsylvania
25	Irene Young	29	Wife	—	Illinois
26	Mary Jane Young	2	Daughter	—	Illinois
27	Millard Keller	38	Head	Postal Clerk	Indiana
28	Edna Keller	34	Wife	—	Iowa
29	June Keller	11	Daughter	—	Illinois
30	Wayne Keller	9	Son	—	Illinois
31	Jeane Keller	7	Son	—	Illinois
32	Millard Jr Keller	1	Son	—	Illinois
33	Lilly Cookman	76	Head	—	England
34	Jeanette Huston	70	Lodger	Steno	Illinois
35	Peter Grentz	39	Lodger	Printer	Illinois
36	Susie Mclaughlin	52	Head	Clerk	Illinois
37	Julia Mclaughlin	34	Daughter	Steno	Illinois
39	Byron Staffeld	36	Head	Education Director	Michigan
40	Edwina Staffeld	29	Wife	—	Michigan

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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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