Mary Riley — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Cook-County, Illinois

Our Model Tree links this Mary Riley across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1849), then head of a 3-person household.

Age 91 b. ~1849 Female Head Born: Ohio Widowed

1940 Census Record Details

Census Year	1940
Location	Cook-County, Illinois
Surname	Riley
Given Name	Mary
Relationship to Head	Head
Sex	F
Color / Race	White
Age	91
Marital Status	Widowed
Birthplace	Ohio
1935 Residence (City)	CHICAGO
1935 Residence (County)	COOK
Additional Details
Income (1939)	0
Highest Grade	No 4
1935 Residence	Same place
Birth State	Ohio
Birth Country	United States
Birthplace (normalized)	ohio
Township / Ward	Chicago
Est. Birth Year	~1849

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 Mary	Age	Birth yr
Hazel Riley	Daughter	—	54	~1886
Mary Riley	Head	—	91	~1849
George Riley	Son	—	65	~1875

Census Appearances

1920

Cook, Illinois

Spouse, age 70

Cook, Illinois · implied b. ~1850 — 6 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Riely
Given Name	Mary
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	70
Marital Status	Married
Birthplace	Ohio
Father's Birthplace	Ireland
Mother's Birthplace	Ireland
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Birth State	Ohio
Birth Country	United States
Birthplace (normalized)	ohio

1930

Cook, Illinois

Head, age 80

Cook, Illinois · implied b. ~1850 — 3 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Riley
Given Name	Mary
Relationship to Head	Head
Sex	F
Color / Race	White
Age	80
Marital Status	Married
Birthplace	Ohio
Age at First Marriage	22
Father's Birthplace	Ireland
Mother's Birthplace	Ireland
Can Read/Write	Yes
Home Owned/Rented	O
Home Value / Rent	12,000
Radio Set	R
Veteran	No
Birth State	Ohio
Birth Country	United States
Birthplace (normalized)	ohio

1940

Cook-County, Illinois

Head, age 91

Cook-County, Illinois · implied b. ~1849 — 3 household members

Surname	Riley
Given Name	Mary
Relationship to Head	Head
Sex	F
Color / Race	White
Age	91
Marital Status	Widowed
Birthplace	Ohio
1935 Residence (City)	CHICAGO
1935 Residence (County)	COOK
Income (1939)	0
Highest Grade	No 4
1935 Residence	Same place
Birth State	Ohio
Birth Country	United States
Birthplace (normalized)	ohio

Model Tree

Linked across censuses

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

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This person

Anchor record

Mary Riley

Head · 1940 · age 91 · b. ~1849 · 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-t0627-01007-00741)

Line	Name	Age	Relation	Occupation	Birthplace
1	Joseph Haselwanter	48	Head	Cabinet Maker	Austria
2	Rosena Haselwanter	49	Wife	—	Germany
3	Rita Barnes	14	Grand Daughter	—	Illinois
4	Emil Krucek	26	Head	Truck Driver	Illinois
5	Catherine Krucek	27	Wife	Trouble Clerk	Michigan
6	Gerald Krucek	1	Son	—	Illinois
7	Mathias Schafer	55	Father in law	Dispenser	Michigan
8	Mary Riley THIS PERSON	91	Head	—	Ohio
9	George Riley	65	Son	President	Illinois
10	Hazel Riley	54	Daughter	—	Illinois
11	Jane Hudock	46	Head	—	Wisconsin
12	Catherine Hudock	20	Daughter	Stenographer	Indiana
13	Mary Hudock	17	Daughter	New Worker	Indiana
14	Jack Gelsomimo	62	Head	—	Italy
15	Josephine Gelsomimo	58	Wife	—	Italy
16	Joseph Gelsomimo	34	Son	Laborer	Illinois
17	Samuel Gelsomimo	28	Son	Laborer	Illinois
18	Dominick Ciaccil	52	Head	Proprietor	Italy
19	Rose Ciaccil	44	Wife	—	Louisiana
20	Josephine Ciaccil	22	Daughter	New Worker	Illinois
21	Loretta Ciaccil	19	Daughter	Shoe Inspector	Illinois
22	Anna Depierro	64	Head	—	Italy
23	Tony Depierro	43	Son	Laborer	Illinois
24	Joseph Kvarda	44	Son in law	—	Illinois
25	Rose Kvarda	42	Wife	—	Illinois
26	John Klan	48	Head	Piano Strings	Illinois
27	Laura Klan	49	Wife	—	Illinois
28	Joseph Barret	45	Lodger	Freight Checker	Kentucky
29	Anthony Diganci	41	Head	Proprietor	Italy
30	Mary Diganci	39	Wife	—	Illinois
31	Thomas Diganci	17	Son	Helper Stock	Illinois
32	John Diganci	13	Son	—	Illinois
33	Frank Koskosky	37	Head	Truck Driver	Illinois
34	Jessie Koskosky	32	Wife	—	Italy
35	Frank Jr. Koskosky	5	Son	—	Illinois
36	Susan Koskosky	3	Daughter	—	Illinois
37	William Thorsen	34	Head	Salesman	Denmark
38	Marie Thorsen	35	Wife	—	Germany
39	June Thorsen	7	Daughter	—	Illinois
40	William Jr. Thorsen	6	Son	—	Illinois

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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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