Mary Dillon — 1940 US Census Record

Model Tree available

1940 United States Federal Census · Cook-County, Illinois

Our Model Tree links this Mary Dillon across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Daniel & Anna — first a spouse (b.~1885), then head of a 3-person household.

Age 55 b. ~1885 Female Spouse Born: Illinois Married

1940 Census Record Details

Census Year	1940
Location	Cook-County, Illinois
Surname	Dillon
Given Name	Mary
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	55
Marital Status	Married
Birthplace	Illinois
1935 Residence (City)	Chicago
1935 Residence (County)	Cook
Additional Details
Highest Grade	H-4
1935 Residence	Same place
Birth State	Illinois
Birth Country	United States
Birthplace (normalized)	illinois
Township / Ward	Chicago
Est. Birth Year	~1885

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
Mildred Dillon	Daughter	—	16	~1924
William Dillon	Head	—	60	~1880
Mary Dillon	Spouse	—	55	~1885

Census Appearances

1920

Cook, Illinois

Daughter, age 34

Cook, Illinois · implied b. ~1886 — 5 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Dillon
Given Name	Mary
Relationship to Head	Daughter
Sex	F
Color / Race	White
Age	34
Marital Status	Single
Birthplace	Illinois
Father's Birthplace	Ireland
Mother's Birthplace	Ireland
Occupation	Hand sewer
Industry	Stops
Class of Worker	W
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Birth State	Illinois
Birth Country	United States
Birthplace (normalized)	illinois

1930

Cook, Illinois

Other, age 45

Cook, Illinois · implied b. ~1885 — 5 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Dillon
Given Name	Mary A.
Relationship to Head	Sister-in-law
Sex	F
Color / Race	White
Age	45
Marital Status	Single
Birthplace	Illinois
Father's Birthplace	Ireland
Mother's Birthplace	Ireland
Occupation	Collector
Industry	Newspaper
Class of Worker	W
Can Read/Write	Yes
Birth State	Illinois
Birth Country	United States
Birthplace (normalized)	illinois

1940

Cook-County, Illinois

Spouse, age 55

Cook-County, Illinois · implied b. ~1885 — 3 household members

Surname	Dillon
Given Name	Mary
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	55
Marital Status	Married
Birthplace	Illinois
1935 Residence (City)	Chicago
1935 Residence (County)	Cook
Highest Grade	H-4
1935 Residence	Same place
Birth State	Illinois
Birth Country	United States
Birthplace (normalized)	illinois

Model Tree

Model Tree available

Our Model Tree links Mary Dillon across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Daniel Dillon (~0.92 confidence) and mother Anna Dillon (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.

Show:

Gen 1 Parents confidence ≈ 0.92

Father

Daniel Dillon

b. ~1855

Source father

● Household · direct · ~0.92

Mother

Anna Dillon

b. ~1860

Source mother

● Household · direct · ~0.92

This person

Anchor record

Mary Dillon

Spouse · 1940 · age 55 · b. ~1885 · Illinois

★ 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 — Cook-County, Illinois Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-00945-00281)

Line	Name	Age	Relation	Occupation	Birthplace
1	James Lynch	30	Head	Switchman	Illinois
2	Gertrude Lynch	30	Wife	—	Illinois
3	Fred Strohacker	52	Head	Captain	Illinois
4	Anna Strohacker	48	Wife	—	Illinois
5	Lois Strohacker	26	Daughter	Typist	Illinois
6	Fred Strohacker	24	Son	Laborer	Illinois
7	Josephine Flannery	40	Head	—	Illinois
8	John Mcnamara	47	Head	Bricklayer	Illinois
9	James Mcnamara	45	Brother	Carpenter	Illinois
10	Elizabeth Mcnamara	39	Sister	—	Illinois
11	Harry Mcnamara	37	Brother	Laborer	Illinois
12	Arthur Sardwell	31	Head	Laborer	Illinois
13	Ruth Sardwell	26	Wife	—	Illinois
14	Sharon Sardwell	7	Daughter	—	Illinois
15	Thomas Sardwell	6	Son	—	Illinois
16	John Tomkins	19	Cousin	Packer	Illinois
17	Fred Gembric	56	Head	Conductor	Illinois
18	Emma Gembric	52	Wife	—	Illinois
19	Esther Gembric	25	Daughter	Clerk	Illinois
20	Harvey Gembric	23	Son	Clerk	Illinois
21	William Dillon	60	Head	—	Illinois
22	Mary Dillon THIS PERSON	55	Wife	—	Illinois
23	Mildred Dillon	16	Daughter	—	Illinois
24	William Toneray	56	Head	—	Illinois
25	William Toneray	26	Son	Shipping Clerk	Illinois
26	Richard Kent	67	Head	Salesman (Furniture)	Illinois
27	Sophia Kent	62	Wife	—	Germany
28	John Kent	42	Son	Conductor	Illinois
29	Richard Kent	19	Son	Clerk	Illinois
30	Nelda Kent	21	Daughter	Clerk	Illinois
31	Stanley Fowler	31	Head	Clerk	Illinois
32	Maybelle Fowler	28	Wife	—	Illinois
33	Charles Fowler	5	Son	—	Illinois
34	Marlene Fowler	2	Daughter	—	Illinois
35	John Nau	49	Head	—	Michigan
36	Catherine Nau	44	Wife	—	Missouri
37	August Buck	63	Head	Butcher	Germany
38	Ida Buck	53	Wife	—	Illinois
39	Catherine Buck	21	Daughter	—	Illinois
40	Russell Kenzel	26	Son	Machinist	Wisconsin

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Pedigree Summary

Mary

Gen 1 · 2 parents ~0.92

Max depth 4 (1900–1950 window)

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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