Mary Chapman — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Clackamas-County, Oregon

Our Model Tree links this Mary Chapman across the 1920, 1930 and 1940 US Censuses in Clackamas-County, Oregon (XGBoost, ~Confirmed) — first a spouse (b.~1885), then head of a 4-person household.

Age 55 b. ~1885 Female Spouse Born: Wisconsin Married

1940 Census Record Details

Census Year	1940
Location	Clackamas-County, Oregon
Surname	Chapman
Given Name	Mary
Relationship to Head	wife
Sex	F
Color / Race	White
Age	55
Marital Status	Married
Birthplace	Wisconsin
1935 Residence (City)	Precinct 3-21
1935 Residence (County)	Clackamas
Additional Details
Income (1939)	0
Highest Grade	No 8
1935 Residence	Same house
Birth State	Wisconsin
Birth Country	United States
Birthplace (normalized)	wisconsin
Township / Ward	Precinct 321
Est. Birth Year	~1885

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 Mary	Age	Birth yr
Fredrick Chapman	Head	—	59	~1881
Norman Chapman	Son	—	14	~1926
Kenneth Chapman	Son	—	17	~1923
Mary Chapman	Spouse	—	55	~1885

Census Appearances

1920

Clackamas, Oregon

Spouse, age 36

Clackamas, Oregon · implied b. ~1884 — 5 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Chapman
Given Name	Mary
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	36
Marital Status	Married
Birthplace	Wisconsin
Father's Birthplace	England
Mother's Birthplace	England
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Mother Tongue	English
Birth State	Wisconsin
Birth Country	United States
Birthplace (normalized)	wisconsin

1930

Clackamas, Oregon

Spouse, age 45

Clackamas, Oregon · implied b. ~1885 — 8 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Chapman
Given Name	Mary E.
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	45
Marital Status	Married
Birthplace	Wisconsin
Age at First Marriage	23
Father's Birthplace	England
Mother's Birthplace	England
Can Read/Write	Yes
Birth State	Wisconsin
Birth Country	United States
Birthplace (normalized)	wisconsin

1940

Clackamas-County, Oregon

Spouse, age 55

Clackamas-County, Oregon · implied b. ~1885 — 4 household members

Surname	Chapman
Given Name	Mary
Relationship to Head	wife
Sex	F
Color / Race	White
Age	55
Marital Status	Married
Birthplace	Wisconsin
1935 Residence (City)	Precinct 3-21
1935 Residence (County)	Clackamas
Income (1939)	0
Highest Grade	No 8
1935 Residence	Same house
Birth State	Wisconsin
Birth Country	United States
Birthplace (normalized)	wisconsin

Model Tree

Linked across censuses

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

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This person

Anchor record

Mary Chapman

Spouse · 1940 · age 55 · b. ~1885 · Oregon

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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 — Clackamas-County, Oregon Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-03354-00440)

Line	Name	Age	Relation	Occupation	Birthplace
41	George Albert O'Connor	11	son	—	Oregon
42	Charles O'Connor	34	head	Farmer	South Dakota
43	Mary O'Connor	27	wife	—	South Dakota
44	John Idler	76	head	Farmer	Oregon
45	Kittie Idler	65	wife	—	Oregon
46	Ruby Idler	31	daughter	—	Oregon
47	Clarence Mcconnell	54	head	Farmer	Oregon
48	James Mcconnell	67	brother	Farmer	Oregon
49	Anna Mcconnell	56	sister	—	Oregon
50	Minnie Comstock	71	step sister	—	Oregon
51	Leslie D. Comstock	73	head	—	Iowa
52	Joseph D. Taylor	59	head	Farmer	Wisconsin
53	Lorena Taylor	48	wife	—	Oregon
54	Joseph Jr. Taylor	17	son	—	Oregon
55	Doris Taylor	15	daughter	—	Oregon
56	Darnell Kelley	39	head	Farmer	Oregon
57	Jessie Kelley	63	aunt	—	Oregon
58	Charles Guyton	63	head	Farmer	Oregon
59	Cora Guyton	61	wife	—	Illinois
60	Fredrick Chapman	59	head	Farmer	Canada
61	Mary Chapman THIS PERSON	55	wife	—	Wisconsin
62	Kenneth Chapman	17	son	—	Oregon
63	Norman Chapman	14	son	—	Oregon
64	Raymond Taylor	25	head	Carpenter	Oregon
65	Mina Taylor	27	wife	—	Iowa
66	Waldo Moor	35	head	Lineman	Wisconsin
67	Anna Moor	32	wife	—	Illinois
68	Joyce Moor	6	daughter	—	California
69	Muriel Moor	4	daughter	—	Oregon
70	Jesse Lee Moor	2	son	—	Oregon
71	Charles Ballard	33	head	Farmer	Oregon
72	Mildred Ballard	28	wife	—	Oregon
73	Dorothy Ballard	10	daughter	—	Oregon
74	Doris Ballard	8	daughter	—	Oregon
75	Billy Mae Ballard	4	daughter	—	Oregon
76	Charlene Ballard	2	daughter	—	Oregon
77	Julia Grunder	53	head	—	Oregon
78	Matilda Knight	80	mother	—	Missouri
79	Fred H. Eggimann	52	head	Farmer	North Dakota
80	Rose Eggimann	50	wife	—	Minnesota

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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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