Margaret Cox — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · St.-Clair-County, Illinois

Our Model Tree links this Margaret Cox across the 1920, 1930 and 1940 US Censuses in St.-Clair-County, Illinois (XGBoost, ~Confirmed) — first a spouse (b.~1877), then head of a 5-person household.

Age 63 b. ~1877 Female Spouse Born: Illinois Married

1940 Census Record Details

Census Year	1940
Location	St.-Clair-County, Illinois
Surname	Cox
Given Name	Margaret
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	63
Marital Status	Married
Birthplace	Illinois
1935 Residence (City)	East St. Louis
1935 Residence (County)	St. Clair
Additional Details
Highest Grade	Hs 4
1935 Residence	Same place
Birth State	Illinois
Birth Country	United States
Birthplace (normalized)	illinois
Township / Ward	East St Louis
Est. Birth Year	~1877

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 Margaret	Age	Birth yr
George Cox	Other	—	85	~1855
Margaret Cox	Spouse	—	63	~1877
Morris Elliott	Son	—	32	~1908
Hattie Cox	Daughter	—	50	~1890
Herbert Cox	Head	—	75	~1865

Census Appearances

1920

St Clair, …

Spouse, age 43

St Clair, Illinois · implied b. ~1877 — 6 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Cox
Given Name	Margaret
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	43
Marital Status	Married
Birthplace	Illinois
Father's Birthplace	Kentucky
Mother's Birthplace	Illinois
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Birth State	Illinois
Birth Country	United States
Birthplace (normalized)	illinois

1930

St Clair, …

Spouse, age 53

St Clair, Illinois · implied b. ~1877 — 5 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Cox
Given Name	Margaret H.
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	53
Marital Status	Married
Birthplace	Illinois
Age at First Marriage	23
Father's Birthplace	Kentucky
Mother's Birthplace	Illinois
Can Read/Write	Yes
Birth State	Illinois
Birth Country	United States
Birthplace (normalized)	illinois

1940

St.-Clair-County, Illinois

Spouse, age 63

St.-Clair-County, Illinois · implied b. ~1877 — 5 household members

Surname	Cox
Given Name	Margaret
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	63
Marital Status	Married
Birthplace	Illinois
1935 Residence (City)	East St. Louis
1935 Residence (County)	St. Clair
Highest Grade	Hs 4
1935 Residence	Same place
Birth State	Illinois
Birth Country	United States
Birthplace (normalized)	illinois

Model Tree

Linked across censuses

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

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This person

Anchor record

Margaret Cox

Spouse · 1940 · age 63 · b. ~1877 · 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 — St.-Clair-County, Illinois Open full size

Page Contents

38 people indexed on this census page (nara:1940:m-t0627-00881-00154)

Line	Name	Age	Relation	Occupation	Birthplace
1	Elmer Allison	26	Head	—	Missouri
2	Elizabeth Allison	22	Wife	—	Illinois
3	Harry Harper	50	Lodger	Waiter	Ohio
4	Minnie Harper	36	Lodger	Cook	Illinois
5	Martha Throck	60	Lodger	—	Illinois
6	Fred Hillagored	60	Lodger	Salesman	Germany
7	Herbert W. Cox	75	Head	Real Estate Agent	Wisconsin
8	Margaret Cox THIS PERSON	63	Wife	—	Illinois
9	Hattie Cox	50	Daughter	Private Sect.	Oklahoma
10	Morris Elliott	32	Son	Laborer	Illinois
11	George Cox	85	Brother	—	Kansas
12	Mary Midgly	39	Head	Asst.	Illinois
13	Morris Midgly	15	Son	—	Illinois
14	John E. Wuest	33	Head	Freight Office	Illinois
15	Catherine Wuest	31	Wife	—	Missouri
16	John Jr. Wuest	8	Son	—	Illinois
17	Alvin Cullison	62	Grandfather	—	Missouri
18	Grace Cullison	61	Grandmother	—	Missouri
19	Roosevelt Mccormick	37	Lodger	Laborer	Illinois
20	Virgil Canery	31	Lodger	Salesman	Missouri
21	Dudley S. Vaughan	52	Head	Watchman	Arkansas
22	Eloise Vaughan	47	Wife	—	Tennessee
23	Ivon Vaughan	21	Daughter	New Worker	Missouri
24	Dudley Vaughan	13	Son	—	Illinois
25	Gene Vaughan	7	Son	—	Illinois
26	Glen Vaughan	7	Son	—	Illinois
28	Dolores Dal Campbell	17	Head	—	Illinois
29	William Starkel	56	Lodger	Bartender	Illinois
30	Donaldson Lavina	40	Head	Teaching	Illinois
31	Edna Lavina	30	Sister	Teaching	Illinois
32	James Langay	45	Head	Salesman	Illinois
33	Ruth Langay	42	Wife	—	Illinois
34	Donna L. Langay	22	Daughter	Sect.	Illinois
35	Eval Thompson	33	Head	Clerk	Illinois
36	Mildred Thompson	22	Wife	—	Missouri
37	Donald Reeves	25	Head	Radio Salesman	Illinois
38	Dorothy Reeves	27	Wife	Order Clerk	Illinois
39	Kathleen Angin	22	Lodger	Operator	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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