John Simpson — 1940 US Census Record

Model Tree available

1940 United States Federal Census · Multnomah-County, Oregon

Our Model Tree links this John Simpson across the 1920, 1930 and 1940 US Censuses in Multnomah-County, Oregon (XGBoost, ~Confirmed), with identified parents Janet & John — first a son (b.~1917), then head of a 4-person household.

Age 23 b. ~1917 Male Son Born: Oregon Single

1940 Census Record Details

Census Year	1940
Location	Multnomah-County, Oregon
Surname	Simpson
Given Name	John A Jr
Relationship to Head	Son
Sex	M
Color / Race	White
Age	23
Marital Status	Single
Birthplace	Oregon
1935 Residence (City)	Portland City
1935 Residence (County)	Multnomah
Additional Details
Highest Grade	C 3
1935 Residence	Same House
Birth State	Oregon
Birth Country	United States
Birthplace (normalized)	oregon
Township / Ward	Portland City
Est. Birth Year	~1917

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 Simpson	Head	—	51	~1889
John Simpson	Son	—	23	~1917
William Simpson	Son	—	20	~1920
Janet Simpson	Spouse	—	53	~1887

Census Appearances

1920

Multnomah, Oregon

Son, age 3

Multnomah, Oregon · implied b. ~1917 — 2 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Simpson
Given Name	John W
Relationship to Head	Son
Sex	M
Color / Race	White
Age	3
Marital Status	Single
Birthplace	Oregon
Father's Birthplace	Scotland
Mother's Birthplace	Scotland
Birth State	Oregon
Birth Country	United States
Birthplace (normalized)	oregon

1930

Multnomah, Oregon

Son, age 13

Multnomah, Oregon · implied b. ~1917 — 4 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Simpson
Given Name	John A Jr
Relationship to Head	Son
Sex	M
Color / Race	White
Age	13
Marital Status	Single
Birthplace	Oregon
Father's Birthplace	Scotland
Mother's Birthplace	Scotland
Can Read/Write	Yes
Birth State	Oregon
Birth Country	United States
Birthplace (normalized)	oregon

1940

Multnomah-County, Oregon

Son, age 23

Multnomah-County, Oregon · implied b. ~1917 — 4 household members

Surname	Simpson
Given Name	John A Jr
Relationship to Head	Son
Sex	M
Color / Race	White
Age	23
Marital Status	Single
Birthplace	Oregon
1935 Residence (City)	Portland City
1935 Residence (County)	Multnomah
Highest Grade	C 3
1935 Residence	Same House
Birth State	Oregon
Birth Country	United States
Birthplace (normalized)	oregon

Model Tree

Model Tree available

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

Show:

Gen 1 Parents confidence ≈ 0.92

Mother

Janet Simpson

b. ~1887

Source mother

● Household · direct · ~0.92

Father

John Simpson

b. ~1889

Source father

● Household · direct · ~0.92

This person

Anchor record

John Simpson

Son · 1940 · age 23 · b. ~1917 · Oregon

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Sibling

William Simpson

Sibling · 1940 · age 20

Source co-child of head (derived)

● Co-child · derived · ~0.88

Confirmed / household (~0.90+) Probable / derived (~0.65–0.89) Candidate (<0.65, unverified)

Original Census Page

1940 US Federal Census — Multnomah-County, Oregon Open full size

Page Contents

39 people indexed on this census page (nara:1940:m-t0627-03391-00460)

Line	Name	Age	Relation	Occupation	Birthplace
41	Gertrude E Green	59	Wife	Teacher	Nebraska
42	John A Simpson	51	Head	Owner	Scotland
43	Janet C B Simpson	53	Wife	—	Scotland
44	John A Jr Simpson THIS PERSON	23	Son	—	Oregon
45	William B Simpson	20	Son	Tech Assistant	Oregon
46	Hugh L Biggs	35	Head	Lawyer	Oregon
47	Elva Ware Biggs	32	Wife	—	Washington
48	Suzanne Biggs	7	Daughter	—	Oregon
49	Barrington Hugh Biggs	5	Son	—	Oregon
50	Charles B Skinner	56	Head	Senior Clerk	New York
51	Irma A Skinner	47	Wife	—	Oregon
52	Carol Skinner	13	Son	—	Oregon
54	John M Colon	44	Head	Lawyer	New York
55	Winona M Colon	42	Wife	—	Oregon
56	Margaret A Colon	21	Daughter	Saleswoman	Oregon
57	John M Jr Colon	18	Son	—	Oregon
58	Stanley D Swiers	46	Head	Signal Foreman	Iowa
59	Beulah E Swiers	43	Wife	—	Illinois
60	George Richard Swiers	21	Son	Real Estate Salesman	Oregon
61	Keith Edwin Swiers	16	Son	Paper Carrier	Oregon
62	Harold A Weiss	38	Head	Branch Loan Examiner	Oregon
63	Regina E Weiss	37	Wife	—	Oregon
64	H. Allen Weiss	10	Son	—	Oregon
65	Geo W Mimnaugh	34	Head	Manager	Oregon
66	Lois L Mimnaugh	34	Wife	—	Georgia
67	Joan L Mimnaugh	11	Daughter	—	Oregon
68	Lois L Mimnaugh	7	Daughter	—	Oregon
69	George Jr Mimnaugh	4	Son	—	Oregon
70	Walter G Page	49	Head	Mgr Claims Dept	Oregon
71	Gladys E Page	44	Wife	—	Oregon
72	Robert W Page	11	Son	—	Oregon
73	Leland S Davis	39	Head	Division Pole Clerk	Washington
74	Vera S Davis	39	Wife	—	South Dakota
75	Leland S Jr Davis	20	Son	Messenger	Oregon
76	Rose L Pratt	70	Mother-in-law	—	Iowa
77	Marguerite H Cornell	54	Head	—	Oregon
78	Janet L Cornell	18	Daughter	—	Idaho
79	Phil R Brownell	24	Lodger	Statistician	Oregon
80	—	None	—	—	—

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Pedigree Summary

John + 1 sibling

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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