Isaac Thomas — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Jefferson-County, Ohio

Our Model Tree links this Isaac Thomas across the 1920, 1930 and 1940 US Censuses in Jefferson-County, Ohio (XGBoost, ~Confirmed) — first a head (b.~1875), then head of a 6-person household.

Age 65 b. ~1875 Male Head Born: Wales Married

1940 Census Record Details

Census Year	1940
Location	Jefferson-County, Ohio
Surname	Thomas
Given Name	Isaac G.
Relationship to Head	Head
Sex	M
Color / Race	White
Age	65
Marital Status	Married
Birthplace	Wales
1935 Residence (City)	Steubenville City
1935 Residence (County)	Jefferson
Naturalization Status	Naturalized
Additional Details
Occupation	Machinist
Industry	Steel Mill
Class of Worker	PW
Hours Worked	40
Income (1939)	1664
Highest Grade	H 2
1935 Residence	Same place
Birth Country	Wales
Birthplace (normalized)	wales
Occupation	Machinist
Township / Ward	Steubenville City
Est. Birth Year	~1875

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.

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

Name	Relation to head	Relative to Isaac	Age	Birth yr
Mathilda Thomas	Daughter	—	24	~1916
Mary Thomas	Spouse	—	54	~1886
Virginia Vance	Daughter	—	27	~1913
Donald Vance	Son	—	3	~1937
Isaac Thomas	Head	—	65	~1875
Reed Vance	Other	—	29	~1911

Census Appearances

1920

Jefferson, Ohio

Head, age 45

Jefferson, Ohio · implied b. ~1875 — 6 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Thomas
Given Name	Isaac
Relationship to Head	Head
Sex	M
Color / Race	White
Age	45
Marital Status	Married
Birthplace	Wales
Year of Immigration	1875
Naturalization Status	un
Father's Birthplace	Wales
Mother's Birthplace	Wales
Occupation	Machinist
Industry	La Belle M
Class of Worker	W
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Mother Tongue	Welsh
Home Owned/Rented	O
Home Free/Mortgaged	M
Birth Country	Wales
Birthplace (normalized)	wales

1930

Jefferson, Ohio

Head, age 53

Jefferson, Ohio · implied b. ~1877 — 4 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Thomas
Given Name	Isaac G
Relationship to Head	Head
Sex	M
Color / Race	White
Age	53
Marital Status	Married
Birthplace	Wales
Naturalization Status	Naturalized
Year of Immigration	1906
Age at First Marriage	26
Father's Birthplace	Wales
Mother's Birthplace	Wales
Occupation	Machinist
Industry	Machine Shop
Class of Worker	W
Can Read/Write	Yes
Mother Tongue	Welsh
Home Owned/Rented	O
Home Value / Rent	5000
Birth Country	Wales
Birthplace (normalized)	wales

1940

Jefferson-County, Ohio

Head, age 65

Jefferson-County, Ohio · implied b. ~1875 — 6 household members

Surname	Thomas
Given Name	Isaac G.
Relationship to Head	Head
Sex	M
Color / Race	White
Age	65
Marital Status	Married
Birthplace	Wales
1935 Residence (City)	Steubenville City
1935 Residence (County)	Jefferson
Naturalization Status	Naturalized
Occupation	Machinist
Industry	Steel Mill
Class of Worker	PW
Hours Worked	40
Income (1939)	1664
Highest Grade	H 2
1935 Residence	Same place
Birth Country	Wales
Birthplace (normalized)	wales

Model Tree

Linked across censuses

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

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This person

Anchor record

Isaac Thomas

Head · 1940 · age 65 · b. ~1875 · Ohio

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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 — Jefferson-County, Ohio Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-03091-00509)

Line	Name	Age	Relation	Occupation	Birthplace
1	Geno Geno	7	Son	—	Ohio
2	Frank Gaylord	43	Head	Locomotive Engineer	Italy
3	Mary Gaylord	34	Wife	—	Italy
4	James Gaylord	17	Son	—	Ohio
5	Irene Gaylord	12	Daughter	—	Ohio
6	Fred C. Myers	39	Head	Salesman	Ohio
7	Alice S. Myers	36	Wife	—	W. Virginia
8	Joseph Myers	14	Son	—	Ohio
9	Kathleen Myers	10	Daughter	—	Ohio
10	Ronald Myers	5	Son	—	Ohio
11	Mary Tomsky	46	Head	—	Lithuania
12	John Tomsky	22	Son	General Laborer	Ohio
13	Andrew Tomsky	17	Son	—	Ohio
14	Adam Koneski	26	Head	Machinist	Ohio
15	Anna Koneski	25	Wife	—	Ohio
16	Georgiana Koneski	6	Daughter	—	Ohio
17	Robert Koneski	2	Son	—	Ohio
18	Isaac G. Thomas THIS PERSON	65	Head	Machinist	Wales
19	Mary C. Thomas	54	Wife	—	W. Virginia
20	Mathilda Thomas	24	Daughter	Interviewer	Ohio
21	Reed M. Vance	29	Son in law	Clerk	W. Virginia
22	Virginia M. Vance	27	Daughter	—	Ohio
23	Donald R. Vance	3	Son	—	Ohio
24	Curtis Leonhart	29	Head	Roller	Ohio
25	Leona Leonhart	25	Wife	—	Pennsylvania
26	Mildred A. Leonhart	1	Daughter	—	Ohio
27	William Zablackas	45	Head	Loader	Lithuania
28	Antoinette Zablackas	50	Wife	—	Lithuania
29	Frank Zablackas	25	Son	Machinist	Ohio
30	Adella Zablackas	23	Daughter	Presser	Ohio
31	Loretta Zablackas	19	Daughter	Presser	Ohio
32	Anthony Sr. Gober	63	Head	General Labor	Lithuania
33	Matilda Gober	49	Wife	—	Lithuania
34	Peter Gober	33	Son	Cutter	Pennsylvania
35	Joseph Gober	31	Son	Caster	Ohio
36	Anthony Jr. Gober	22	Son	General Labor	Ohio
37	Albert Gober	21	Son	Bottler	Ohio
38	Stella Gober	19	Daughter	Presser	Ohio
39	Anna Gober	15	Daughter	—	Ohio
40	Charles Gober	15	Son	—	Ohio

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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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