Olga Johnson — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Cook-County, Illinois

Our Model Tree links this Olga Johnson across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a spouse (b.~1889), then head of a 3-person household.

Age 51 b. ~1889 Female Spouse Born: ILLINOIS Married

1940 Census Record Details

Census Year	1940
Location	Cook-County, Illinois
Surname	JOHNSON
Given Name	OLGA
Relationship to Head	WIFE
Sex	F
Color / Race	White
Age	51
Marital Status	Married
Birthplace	ILLINOIS
1935 Residence (City)	CHICAGO CITY
1935 Residence (County)	COOK
Additional Details
Highest Grade	No 6
1935 Residence	Same place
Birth State	Illinois
Birth Country	United States
Birthplace (normalized)	illinois
Township / Ward	Chicago City
Est. Birth Year	~1889

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.

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

Name	Relation to head	Relative to Olga	Age	Birth yr
Raymond Johnson	Son	—	11	~1929
John Johnson	Head	—	47	~1893
Olga Johnson	Spouse	—	51	~1889

Census Appearances

1920

Cook, Illinois

Spouse, age 30

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

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Johnson
Given Name	Olga
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	30
Marital Status	Married
Birthplace	Illinois
Father's Birthplace	Sweden
Mother's Birthplace	Sweden
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Birth State	Illinois
Birth Country	United States
Birthplace (normalized)	illinois

1930

Cook, Illinois

Spouse, age 41

Cook, Illinois · implied b. ~1889 — 5 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Johnson
Given Name	Olga
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	41
Marital Status	Married
Birthplace	Illinois
Age at First Marriage	28
Father's Birthplace	Sweden
Mother's Birthplace	Sweden
Occupation	none
Can Read/Write	Yes
Birth State	Illinois
Birth Country	United States
Birthplace (normalized)	illinois

1940

Cook-County, Illinois

Spouse, age 51

Cook-County, Illinois · implied b. ~1889 — 3 household members

Surname	JOHNSON
Given Name	OLGA
Relationship to Head	WIFE
Sex	F
Color / Race	White
Age	51
Marital Status	Married
Birthplace	ILLINOIS
1935 Residence (City)	CHICAGO CITY
1935 Residence (County)	COOK
Highest Grade	No 6
1935 Residence	Same place
Birth State	Illinois
Birth Country	United States
Birthplace (normalized)	illinois

Model Tree

Linked across censuses

Our Model Tree links Olga 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

Olga Johnson

Spouse · 1940 · age 51 · b. ~1889 · 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

40 people indexed on this census page (nara:1940:m-t0627-01002-00407)

Line	Name	Age	Relation	Occupation	Birthplace
41	William Thesen	25	SON	Laborer	ILLINOIS
42	Charles Thesen	24	SON	Scale Assembler	ILLINOIS
43	Lorraine Thesen	20	DAUGHTER	—	ILLINOIS
44	Mary Thesen	18	DAUGHTER	—	ILLINOIS
45	Elmer Jr Thesen	15	SON	—	ILLINOIS
46	Donald Thesen	11	SON	—	ILLINOIS
47	John W. Johnson	47	HEAD	Mechanic Assembler	SWEDEN
48	Olga Johnson THIS PERSON	51	WIFE	—	ILLINOIS
49	Raymond Johnson	11	SON	—	ILLINOIS
50	Clarence Sundmacher	49	HEAD	Travelling Salesman	ILLINOIS
51	Margaret Sundmacher	47	WIFE	—	ILLINOIS
52	Robert Sundmacher	15	SON	—	ILLINOIS
53	Carrie Gleim	51	HEAD	Biller-Stenographer	ILLINOIS
54	Hilda Gleim	53	SISTER	—	ILLINOIS
55	Mary Gleim	80	MOTHER	—	ILLINOIS
56	Charles Campion	49	BROTHER	Biller	ILLINOIS
57	Tony Campion	44	HEAD	Proprietor	ITALY
58	Esther Campion	41	WIFE	—	RUSSIA
59	May Campion	22	DAUGHTER	Stenographer	ILLINOIS
60	Marjorie Campion	18	DAUGHTER	—	ILLINOIS
61	Sylvia Campion	15	DAUGHTER	—	ILLINOIS
62	Sam Campion	39	HEAD	Salesmanager Auditing Dept.	ILLINOIS
63	Philomene Campion	30	WIFE	—	ILLINOIS
64	Robert Campion	8	SON	—	ILLINOIS
65	Cecil Sparks	44	HEAD	Brick-Layer	KANSAS
66	Ottie Sparks	46	WIFE	—	GERMANY
67	Cecil Jr Sparks	22	SON	—	MISSOURI
68	Alfred Edelman	42	HEAD	Truck Driver	ILLINOIS
69	Clara Edelman	40	WIFE	Chauffeur	ILLINOIS
70	Joyce M. Edelman	3	FOSTER-DAUGHTER	—	ILLINOIS
71	Robert K. Shipman	22	FOSTER-SON	Office Clerk	ILLINOIS
72	Ernest Speal	62	HEAD	Shoe Repairman	GERMANY
73	Elizabeth Speal	59	WIFE	—	GERMANY
74	Ernest Jr Speal	23	SON	Apprentice Tin-Smith	ILLINOIS
75	William Speal	18	SON	Reforestation Laborer	ILLINOIS
76	Benjamin Landquist	55	HEAD	Foreman-Factory	SWEDEN
77	Hulda Landquist	54	WIFE	—	MINNESOTA
78	Edward Landquist	25	HEAD	Office Clerk	ILLINOIS
79	Anny Landquist	20	WIFE	—	NEBRASKA
80	Joseph Ouimet	57	HEAD	Metal Polisher	CANADA-FRENCH

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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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