Mary Lewis — 1940 US Census Record

Linked across censuses

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

Our Model Tree links this Mary Lewis across the 1920, 1930 and 1940 US Censuses in St.-Clair-County, Illinois (XGBoost, ~Confirmed) — first a spouse (b.~1888), then head of a 8-person household.

Age 52 b. ~1888 Female Spouse Born: Mississippi Married

1940 Census Record Details

Census Year	1940
Location	St.-Clair-County, Illinois
Surname	Lewis
Given Name	Mary
Relationship to Head	Wife
Sex	F
Color / Race	Black
Age	52
Marital Status	Married
Birthplace	Mississippi
1935 Residence (City)	E. St. Louis City
1935 Residence (County)	St. Clair
Additional Details
Industry	0
Highest Grade	No 8
1935 Residence	Same Place
Birth State	Mississippi
Birth Country	United States
Birthplace (normalized)	mississippi
Township / Ward	E St Louis City
Est. Birth Year	~1888

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.

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

Name	Relation to head	Relative to Mary	Age	Birth yr
Claudia Lewis	Daughter	—	20	~1920
Barbara Lewis	Daughter	—	16	~1924
Nellie Lewis	Daughter	—	30	~1910
Mack Lewis	Head	—	52	~1888
Alex Lewis	Son	—	29	~1911
Dudley Lewis	Son	—	13	~1927
Stanley Lewis	Son	—	18	~1922
Mary Lewis	Spouse	—	52	~1888

Census Appearances

1920

St Clair, …

Spouse, age 32

St Clair, Illinois · implied b. ~1888 — 6 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Lewis
Given Name	Mary
Relationship to Head	Wife
Sex	F
Color / Race	Black
Age	32
Marital Status	Married
Birthplace	Mississippi
Father's Birthplace	Mississippi
Mother's Birthplace	Mississippi
Occupation	none
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Birth State	Mississippi
Birth Country	United States
Birthplace (normalized)	mississippi

1930

St Clair, …

Spouse, age 42

St Clair, Illinois · implied b. ~1888 — 8 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Lewis
Given Name	Mary
Relationship to Head	Wife
Sex	F
Color / Race	Black
Age	42
Marital Status	Married
Birthplace	Mississippi
Age at First Marriage	21
Father's Birthplace	Mississippi
Mother's Birthplace	Mississippi
Occupation	Laundress
Industry	Private Family
Class of Worker	W
Can Read/Write	Yes
Birth State	Mississippi
Birth Country	United States
Birthplace (normalized)	mississippi

1940

St.-Clair-County, Illinois

Spouse, age 52

St.-Clair-County, Illinois · implied b. ~1888 — 8 household members

Surname	Lewis
Given Name	Mary
Relationship to Head	Wife
Sex	F
Color / Race	Black
Age	52
Marital Status	Married
Birthplace	Mississippi
1935 Residence (City)	E. St. Louis City
1935 Residence (County)	St. Clair
Industry	0
Highest Grade	No 8
1935 Residence	Same Place
Birth State	Mississippi
Birth Country	United States
Birthplace (normalized)	mississippi

Model Tree

Linked across censuses

Our Model Tree links Mary Lewis 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 Lewis

Spouse · 1940 · age 52 · b. ~1888 · 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

40 people indexed on this census page (nara:1940:m-t0627-00881-00323)

Line	Name	Age	Relation	Occupation	Birthplace
41	Sylvester Merritt	17	Son	—	Illinois
42	Eddie Mae Merritt	16	Daughter	—	Illinois
43	Edward Merritt	14	Daughter	—	Illinois
44	Alice Jackson	35	Head	Janitress	Mississippi
45	James Jackson	9	Son	—	Illinois
46	Anna Potter	None	The	—	57
47	Anna Polk	42	Head	Housekeeper	Tennessee
48	Johnnie L. Nelson	13	Grandson	—	Illinois
49	Harrison Merritt	50	Head	Chipper	Louisiana
50	Jannie Merritt	40	Wife	—	Tennessee
51	Mack Lewis	52	Head	—	Mississippi
52	Mary Lewis THIS PERSON	52	Wife	—	Mississippi
53	Nellie Lewis	30	Daughter	—	Mississippi
54	Alex Lewis	29	Son	—	Mississippi
55	Claudia Lewis	20	Daughter	—	Illinois
56	Stanley Lewis	18	Son	—	Illinois
57	Barbara Lewis	16	Daughter	—	Illinois
58	Dudley Lewis	13	Son	—	Illinois
59	Walter Harpie	30	Head	Laborer	Arkansas
60	Louie Harpie	28	Wife	—	Illinois
61	Following The	None	people	—	—
62	John Smith	45	Head	Cleaner	Arkansas
63	Anna Smith	38	Wife	—	Mississippi
64	James Boyd	26	Cousin	Laborer	Mississippi
65	Callie Payne	62	Head	—	Mississippi
66	Frank Thomas	27	Son	Laborer	Mississippi
67	James Williams	34	Head	Laborer	Mississippi
68	Lucille Williams	32	Wife	—	Oklahoma
69	Laverne Williams	13	Daughter	—	Illinois
70	John Childs	25	Head	Lug Grinder	Tennessee
71	John Miles	55	Head	Laborer	Arkansas
72	Velma L. Miles	12	Daughter	—	Arkansas
73	Andrew Theodore	37	Head	Laborer	Arkansas
74	Mary L. Richard	75	Mother	—	Georgia
75	Nellie Madison	28	Head	Housekeeper	Kentucky
76	Odessa Madison	12	Daughter	—	Mississippi
77	Arch Neely	57	Head	Laborer	Tennessee
78	Lillian Robinson	37	Lodger	Housekeeper	Tennessee
79	Lucy Dunlap	39	Lodger	Laundress	Tennessee
80	Charles Burney	34	Head	Shipper	Mississippi

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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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