John Duncan — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Harris-County, Texas

Our Model Tree links this John Duncan across the 1920, 1930 and 1940 US Censuses in Harris-County, Texas (XGBoost, ~Confirmed) — first a head (b.~1879), then head of a 4-person household.

Age 61 b. ~1879 Male Head Born: Iowa Married

1940 Census Record Details

Census Year	1940
Location	Harris-County, Texas
Surname	Duncan
Given Name	John A
Relationship to Head	Head
Sex	M
Color / Race	White
Age	61
Marital Status	Married
Birthplace	Iowa
1935 Residence (City)	Houston
1935 Residence (County)	Harris
Additional Details
Occupation	Assessor Collector
Industry	Public School
Class of Worker	GW
Hours Worked	44
Income (1939)	2700
Highest Grade	Hs 4
1935 Residence	Texas
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa
Occupation	Assessor Collector
Township / Ward	Pasadena Town
Est. Birth Year	~1879

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
Muriel Duncan	Daughter	—	26	~1914
John Duncan	Head	—	61	~1879
Hurlyn Duncan	Son	—	36	~1904
Verna Duncan	Spouse	—	61	~1879

Census Appearances

1920

Harris, Texas

Head, age 41

Harris, Texas · implied b. ~1879 — 6 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Duncan
Given Name	John A.
Relationship to Head	Head
Sex	M
Color / Race	White
Age	41
Marital Status	Married
Birthplace	Iowa
Father's Birthplace	Iowa
Mother's Birthplace	Tennessee
Occupation	Deputy Clerk
Industry	Co. Precinct
Class of Worker	W
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Home Owned/Rented	O
Home Free/Mortgaged	F
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa

1930

Harris, Texas

Head, age 49

Harris, Texas · implied b. ~1881 — 2 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Duncan
Given Name	John
Relationship to Head	Head
Sex	M
Color / Race	White
Age	49
Marital Status	Married
Birthplace	Iowa
Age at First Marriage	24
Father's Birthplace	Iowa
Mother's Birthplace	Iowa
Can Read/Write	Yes
Home Owned/Rented	R
Home Value / Rent	45
Radio Set	no
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa

1940

Harris-County, Texas

Head, age 61

Harris-County, Texas · implied b. ~1879 — 4 household members

Surname	Duncan
Given Name	John A
Relationship to Head	Head
Sex	M
Color / Race	White
Age	61
Marital Status	Married
Birthplace	Iowa
1935 Residence (City)	Houston
1935 Residence (County)	Harris
Occupation	Assessor Collector
Industry	Public School
Class of Worker	GW
Hours Worked	44
Income (1939)	2700
Highest Grade	Hs 4
1935 Residence	Texas
Birth State	Iowa
Birth Country	United States
Birthplace (normalized)	iowa

Model Tree

Linked across censuses

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

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This person

Anchor record

John Duncan

Head · 1940 · age 61 · b. ~1879 · Texas

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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 — Harris-County, Texas Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-04053-00861)

Line	Name	Age	Relation	Occupation	Birthplace
1	Owen D Laird	31	Head	Welder	Texas
2	Lola A Laird	32	Wife	—	Texas
3	John Ellis Laird	10	Son	—	Texas
4	Jasper Clawson	33	Head	Tool Grinder	Texas
5	Ola M Clawson	31	Wife	—	Texas
6	Jacquelyn Clawson	2	Daughter	—	Texas
7	Tyler R Burns	31	Head	General Office Assistant	Canada-English
8	Virgie Burns	29	Wife	—	Texas
9	Robert Paul Burns	2	Son	—	Texas
10	John A Duncan THIS PERSON	61	Head	Assessor Collector	Iowa
11	Verna H Duncan	61	Wife	—	Iowa
12	Hurlyn H Duncan	36	Son	General Office Assistant	Texas
13	Muriel Duncan	26	Daughter	—	Texas
14	Andrew G Mckinzie	30	Head	Business Manager	Texas
15	Marian S Mckinzie	27	Wife	—	Texas
16	Robert Mckinzie	4	Son	—	Texas
17	Roger Parker	31	Head	Timekeeper	Texas
18	La Nelle Parker	28	Wife	—	Texas
19	Barbara Ann Parker	5	Daughter	—	Texas
20	Kenneth L Parker	3	Son	—	Texas
21	Hubert L Swasey	43	Head	Chemical Engineer	Oregon
22	Rachel Swasey	34	Wife	—	Iowa
23	Kathleen Swasey	5	Daughter	—	Oregon
24	Jane Swasey	2	Daughter	—	Oregon
25	Linford L Swasey	43	Head	Chief Chemist	Maine
26	Mabel G Swasey	43	Wife	—	Massachusetts
27	Robert Swasey	16	Son	—	Maine
28	Allan Swasey	10	Son	—	Maine
29	George Herely	50	Head	Book Mill Superintendent	Virginia
30	Mae Herely	47	Wife	—	Ohio
31	Madonna Herely	23	Daughter	—	Minnesota
32	Mozelle Herely	16	Daughter	—	North Carolina
33	Clyde W Miller	31	Head	Black Room Operator	Kentucky
34	Inez Miller	31	Wife	—	Florida
35	La Rue Miller	3	Daughter	—	North Carolina
36	O. F. Fortwood	36	Head	Proprietor	South Carolina
37	Margie Fortwood	29	Wife	Pharmacist Assistant	Texas
38	Robert B. Fortwood	5	Son	—	Texas
39	Lola Fortwood	59	Mother	—	South Carolina
40	—	None	—	—	—

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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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