John Mills — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Cook-County, Illinois

Our Model Tree links this John Mills across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1885), then head of a 5-person household.

Age 55 b. ~1885 Male Head Born: Sweden Married

1940 Census Record Details

Census Year	1940
Location	Cook-County, Illinois
Surname	Mills
Given Name	John
Relationship to Head	Head
Sex	M
Color / Race	White
Age	55
Marital Status	Married
Birthplace	Sweden
1935 Residence (City)	Wilmette Village
1935 Residence (County)	Cook
Naturalization Status	First papers filed
Additional Details
Occupation	Carpenter
Industry	Building
Class of Worker	OA
Hours Worked	24
Income (1939)	368
Highest Grade	No 8
1935 Residence	Same house
Birth Country	Sweden
Birthplace (normalized)	sweden
Occupation	Carpenter
Township / Ward	Wilmette Village
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.

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

Name	Relation to head	Relative to John	Age	Birth yr
Edith Mills	Daughter	—	21	~1919
John Mills	Head	—	55	~1885
Arnold Mills	Son	—	18	~1922
John Mills	Son	—	20	~1920
Elizabeth Mills	Spouse	—	49	~1891

Census Appearances

1920

Cook, Illinois

Head, age 34

Cook, Illinois · implied b. ~1886 — 8 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Mills
Given Name	John
Relationship to Head	Head
Sex	M
Color / Race	White
Age	34
Marital Status	Married
Birthplace	Sweden
Year of Immigration	1903
Naturalization Status	First papers filed
Father's Birthplace	Sweden
Mother's Birthplace	Sweden
Occupation	Carpenter
Industry	House
Class of Worker	W
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Mother Tongue	Swedish
Home Owned/Rented	O
Home Free/Mortgaged	M
Birth Country	Sweden
Birthplace (normalized)	sweden

1930

Cook, Illinois

Head, age 43

Cook, Illinois · implied b. ~1887 — 11 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Mills
Given Name	John
Relationship to Head	Head
Sex	M
Color / Race	White
Age	43
Marital Status	Married
Birthplace	Sweden
Naturalization Status	Naturalized
Year of Immigration	1908
Age at First Marriage	26
Father's Birthplace	Sweden
Mother's Birthplace	Sweden
Occupation	Carpenter
Industry	Building
Class of Worker	W
Can Read/Write	Yes
Mother Tongue	Swedish
Home Owned/Rented	O
Home Value / Rent	9000
Radio Set	R
Veteran	No
Birth Country	Sweden
Birthplace (normalized)	sweden

1940

Cook-County, Illinois

Head, age 55

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

Surname	Mills
Given Name	John
Relationship to Head	Head
Sex	M
Color / Race	White
Age	55
Marital Status	Married
Birthplace	Sweden
1935 Residence (City)	Wilmette Village
1935 Residence (County)	Cook
Naturalization Status	First papers filed
Occupation	Carpenter
Industry	Building
Class of Worker	OA
Hours Worked	24
Income (1939)	368
Highest Grade	No 8
1935 Residence	Same house
Birth Country	Sweden
Birthplace (normalized)	sweden

Model Tree

Linked across censuses

Our Model Tree links John Mills 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 Mills

Head · 1940 · age 55 · b. ~1885 · 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-t0627-00783-00712)

Line	Name	Age	Relation	Occupation	Birthplace
1	Oberlein	56	—	Laundress	Indiana
2	Tolly Simonson	53	Head	Gardener	Norway
3	Minnie O Simonson	51	Wife	—	Norway
4	Betty Simonson	20	Daughter	Bottle Labeler	Illinois
5	Leif Larson	35	Lodger	Chauffeur	Norway
6	Daniel Leonard	39	Head	Trader	New York
7	Mary O Leonard	34	Wife	—	Illinois
8	Daniel Jr Leonard	4	Son	—	Illinois
9	Sally Leonard	2	Daughter	—	Illinois
10	Tyne Holma	22	Servant	Domestic Servant	Michigan
11	William Haines	29	Head	Manager	New York
12	Patricia O Haines	29	Wife	—	New York
13	William H Haines	2	Son	—	Illinois
14	Daniel Katz	59	Head	Agent	Germany
15	Hortense O Katz	43	Wife	Representative	Illinois
16	Bertha L Katz	16	Daughter	—	Illinois
17	Sidney M Katz	14	Son	—	Illinois
18	James Jr Mcfadzean	59	Head	Carpenter	Scotland
19	Davina O Mcfadzean	59	Wife	—	Scotland
20	James C. Ab. Mcfadzean	20	Son	Dishwasher	Illinois
21	Mary Oliver	26	Daughter	Domestic Servant	Illinois
22	Dina Alliaum	64	Head	Servant	Germany
23	Katherine Will	54	Sister	Domestic Servant	Illinois
24	Carl Barranti	32	Lodger	Order Clerk	Scotland
25	Donald J Murphy	30	Head	Salesman	Iowa
26	Anabel O Murphy	24	Wife	Assistant Assessor	Illinois
27	James Greenebaum	52	Head	Merchant	Illinois
28	Helen O Greenebaum	48	Wife	Case Worker	Illinois
29	Clara Sinsheimer	80	Mother-in-law	—	Ohio
30	Dagne Machola	24	Servant	Domestic Servant	Michigan
31	John Mills THIS PERSON	55	Head	Carpenter	Sweden
32	Elizabeth O Mills	49	Wife	Laundress	Sweden
33	Edith Mills	21	Daughter	—	Illinois
34	John Mills	20	Son	Apprentice Carpenter	Illinois
35	Arnold Mills	18	Son	Delivery Boy	Illinois
36	Garnet Cole	29	Head	Attendant	Illinois
37	Marie O Cole	29	Wife	—	Nebraska
38	Judith Cole	0	Daughter	—	Illinois
39	Edward Nis	49	Head	Technical Engineer	Texas
40	Mary O Nis	40	Wife	—	Tennessee

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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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