John Irwin — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Montgomery-County, Ohio

Our Model Tree links this John Irwin across the 1930 and 1940 US Censuses in Montgomery-County, Ohio (XGBoost, ~Confirmed) — first a head (b.~1893), then head of a 5-person household.

Age 47 b. ~1893 Male Head Born: Indiana Married

1940 Census Record Details

Census Year	1940
Location	Montgomery-County, Ohio
Surname	Irwin
Given Name	John W.
Relationship to Head	Head
Sex	M
Color / Race	White
Age	47
Marital Status	Married
Birthplace	Indiana
1935 Residence (City)	Dayton
Additional Details
Occupation	plant engineer
Industry	refrigeration
Class of Worker	PW
Hours Worked	40
Income (1939)	122
Highest Grade	Hs 3
1935 Residence	Ohio
Birth State	Indiana
Birth Country	United States
Birthplace (normalized)	indiana
Occupation	Plant Engineer
Township / Ward	Washington Twp
Est. Birth Year	~1893

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
Elsie Irwin	Spouse	—	35	~1905
Sandra Irwin	Daughter	—		~1940
Carolyn Irwin	Daughter	—	10	~1930
Sally Irwin	Daughter	—	2	~1938
John Irwin	Head	—	47	~1893

Census Appearances

1930

Montgomery, Ohio

Head, age 37

Montgomery, Ohio · implied b. ~1893 — 4 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Irwin
Given Name	John W.
Relationship to Head	Head
Sex	M
Color / Race	White
Age	37
Marital Status	Married
Birthplace	Indiana
Age at First Marriage	30
Father's Birthplace	Indiana
Mother's Birthplace	Maryland
Occupation	Construction Engineer
Industry	Buildings
Class of Worker	W
Can Read/Write	Yes
Home Owned/Rented	R
Home Value / Rent	25
Radio Set	R
Veteran	No
Birth State	Indiana
Birth Country	United States
Birthplace (normalized)	indiana

1940

Montgomery-County, Ohio

Head, age 47

Montgomery-County, Ohio · implied b. ~1893 — 5 household members

Surname	Irwin
Given Name	John W.
Relationship to Head	Head
Sex	M
Color / Race	White
Age	47
Marital Status	Married
Birthplace	Indiana
1935 Residence (City)	Dayton
Occupation	plant engineer
Industry	refrigeration
Class of Worker	PW
Hours Worked	40
Income (1939)	122
Highest Grade	Hs 3
1935 Residence	Ohio
Birth State	Indiana
Birth Country	United States
Birthplace (normalized)	indiana

Model Tree

Linked across censuses

Our Model Tree links John Irwin across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.

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This person

Anchor record

John Irwin

Head · 1940 · age 47 · b. ~1893 · 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 — Montgomery-County, Ohio Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-03120-00596)

Line	Name	Age	Relation	Occupation	Birthplace
1	Arthur Watkins	59	Head	Farmer	Ohio
2	Bertha Watkins	58	Wife	—	Ohio
3	Russell Watkins	33	Son	Farmer	Ohio
4	Gladys Watkins	34	Daughter-in-law	—	Ohio
5	Janet Watkins	4	Granddaughter	—	Ohio
6	Harry Gebhart	60	Head	Farmer	Ohio
7	Lillie Gebhart	58	Wife	—	Ohio
8	Ernest Miller	56	Head	Farmer	Ohio
9	Reva Miller	55	Wife	—	Ohio
10	Vern Dowlar	11	Grandson	—	Ohio
11	William Brown	62	Head	Farmer	Ohio
12	Bessie Brown	56	Wife	—	Ohio
13	Edgar Poff	49	Head	Farmer	Ohio
14	Clara Poff	46	Wife	—	Ohio
15	Velda Poff	23	Daughter	Clerk Typist	Ohio
16	Kenneth Poff	19	Son	Assembly Helper	Ohio
17	Nevin Poff	12	Son	—	Ohio
18	John W. Irwin THIS PERSON	47	Head	Plant Engineer	Indiana
19	Elsie Irwin	35	Wife	—	Indiana
20	Carolyn Sue Irwin	10	Daughter	—	Indiana
21	Sally Ann Irwin	2	Daughter	—	Ohio
22	Sandra Kay Irwin	0	Daughter	—	Ohio
23	Luther Allen	53	Head	Farmer	Ohio
24	Lucy Allen	51	Wife	—	Ohio
25	Kermith Allen	30	Son	Farmer	Ohio
26	Dorothy Allen	28	Daughter-in-law	—	South Carolina
27	Vernon Allen	7	Grandson	—	Ohio
28	Ronald Allen	2	Grandson	—	Ohio
29	Frank M. Leese	51	Head	Farmer	Kentucky
30	Sella Leese	47	Wife	—	Kentucky
31	Arthur Leese	21	Son	Watchman	Kentucky
32	William Leese	16	Son	—	Ohio
33	Nannie Nunnalley	67	Mother-in-law	—	Kentucky
34	George Hechaline	58	Hired man	Farm Laborer	Ohio
35	Herbert Leitner	55	Head	Clerical Clerk	Ohio
36	Ina Leitner	58	Wife	—	Ohio
37	Dale Leitner	32	Son	Farmer	Ohio
38	Dorothy Leitner	24	Daughter	Special Printer	Ohio
39	Harriet Leitner	20	Daughter	Typist	Ohio
40	Alice Leitner	17	Daughter	—	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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