John Johnston — 1940 US Census Record

Model Tree available

1940 United States Federal Census · Wapello-County, Iowa

Our Model Tree links this John Johnston across the 1920, 1930 and 1940 US Censuses in Wapello-County, Iowa (XGBoost, ~Confirmed), with identified parents Jake & Cordelia — first a head (b.~1902), then head of a 4-person household.

Age 38 b. ~1902 Male Head Born: Iowa Married

1940 Census Record Details

Census Year	1940
Location	Wapello-County, Iowa
Surname	Johnston
Given Name	John
Relationship to Head	Head
Sex	M
Color / Race	White
Age	38
Marital Status	Married
Birthplace	Iowa
1935 Residence (City)	Ottumwa
1935 Residence (County)	Wapello County
Additional Details
Occupation	Picture Mach. Operator
Industry	Ottumwa Theater
Class of Worker	PW
Hours Worked	35
Income (1939)	2204
Highest Grade	H 1
1935 Residence	Same place
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa
Occupation	Picture Mach. Operator
Township / Ward	Ottumwa
Est. Birth Year	~1902

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.

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

Name	Relation to head	Relative to John	Age	Birth yr
John Johnston	Head	—	38	~1902
Jimmie Johnston	Son	—	6	~1934
Jack Johnston	Son	—	10	~1930
Iva Johnston	Spouse	—	36	~1904

Census Appearances

1920

Wapello, Iowa

Son, age 18

Wapello, Iowa · implied b. ~1902 — 6 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Johnston
Given Name	John
Relationship to Head	Son
Sex	M
Color / Race	White
Age	18
Marital Status	Single
Birthplace	Iowa
Father's Birthplace	Iowa
Mother's Birthplace	Iowa
Occupation	Operator
Industry	Moving Picture
Class of Worker	W
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa

1930

Wapello, Iowa

Head, age 28

Wapello, Iowa · implied b. ~1902 — 3 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Johnston
Given Name	John
Relationship to Head	Head
Sex	M
Color / Race	White
Age	28
Marital Status	Married
Birthplace	Iowa
Age at First Marriage	24
Father's Birthplace	Iowa
Mother's Birthplace	Iowa
Occupation	Operator
Industry	Moving Picture
Class of Worker	W
Can Read/Write	Yes
Home Owned/Rented	O
Home Value / Rent	1800
Radio Set	no
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa

1940

Wapello-County, Iowa

Head, age 38

Wapello-County, Iowa · implied b. ~1902 — 4 household members

Surname	Johnston
Given Name	John
Relationship to Head	Head
Sex	M
Color / Race	White
Age	38
Marital Status	Married
Birthplace	Iowa
1935 Residence (City)	Ottumwa
1935 Residence (County)	Wapello County
Occupation	Picture Mach. Operator
Industry	Ottumwa Theater
Class of Worker	PW
Hours Worked	35
Income (1939)	2204
Highest Grade	H 1
1935 Residence	Same place
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa

Model Tree

Model Tree available

Our Model Tree links John Johnston across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Jake Johnston (~0.92 confidence) and mother Cordelia Johnston (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.

Show:

Gen 1 Parents confidence ≈ 0.92

Father

Jake Johnston

b. ~1875

Source father

● Household · direct · ~0.92

Mother

Cordelia Johnston

b. ~1879

Source mother

● Household · direct · ~0.92

This person

Anchor record

John Johnston

Head · 1940 · age 38 · b. ~1902 · Iowa

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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 — Wapello-County, Iowa Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-01209-00817)

Line	Name	Age	Relation	Occupation	Birthplace
1	Edna Robinson	43	Wife	—	Iowa
2	Helen Robinson	16	Daughter	—	Iowa
3	Doris Robinson	12	Daughter	—	Iowa
4	Elsie Mc Clenahan	44	Head	—	Iowa
5	Guy Mc Clenahan	19	Son	Laborer	Iowa
6	E. D. Harnden	61	Head	—	Iowa
7	Della Harnden	56	Wife	—	Iowa
8	John Johnston THIS PERSON	38	Head	Picture Mach. Operator	Iowa
9	Iva Johnston	36	Wife	—	Iowa
10	Jack Johnston	10	Son	—	Iowa
11	Jimmie Johnston	6	Son	—	Iowa
12	Floyd Ebers	43	Head	Salesman	Illinois
13	Ethel Ebers	36	Wife	—	Iowa
14	William Nolan	63	Head	Ass. Foreman	Iowa
15	Stella Nolan	54	Wife	—	Iowa
16	Estella Nolan	21	Son	Laborer	Iowa
17	Bertha De Ford	57	Head	—	Iowa
18	William De Ford	21	Son	Laborer	Iowa
19	Florence Carey	76	Head	—	Iowa
20	Edward Jones	35	Head	Laborer	Iowa
21	Minnie Jones	37	Wife	Laborer	Iowa
22	Clyde Mc Clure	51	Head	Trucksmith	Iowa
23	Daisy Mc Clure	44	Wife	—	Iowa
24	Marion Joseph	68	Head	—	Illinois
25	Mattie Joseph	71	Wife	—	Iowa
26	Harry Joseph	45	Son	Operator Deck	Iowa
27	Ralph Joseph	30	Son	Laborer	Iowa
28	Homer Haney	42	Head	—	Iowa
29	Stella Haney	39	Wife	—	Iowa
30	Donald Haney	2	Son	—	Iowa
31	Maude Chamberlin	60	Head	—	Iowa
32	Rodger Chamberlin	20	Son	Laborer	Iowa
33	Edward Evans	50	Head	—	Iowa
34	Sadie Evans	47	Wife	—	Iowa
35	Everett Johnston	29	Son	Coal Miner	Iowa
36	Lavon Johnston	28	Daughter	—	Iowa
37	Melodene Johnston	4	Grand Daughter	—	Iowa
38	Alfred Evans	79	Father	—	England
39	Charles O. Hosler	58	Head	Checker	Iowa
40	Inez M. Hosler	56	Wife	—	Iowa

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Pedigree Summary

John

Gen 1 · 2 parents ~0.92

Max depth 4 (1900–1950 window)

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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