Mary Olsen — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Coos-County, Oregon

Our Model Tree links this Mary Olsen across the 1920, 1930 and 1940 US Censuses in Coos-County, Oregon (XGBoost, ~Confirmed) — first a head (b.~1883), then head of a 4-person household.

Age 57 b. ~1883 Female Head Born: Washington Widowed

1940 Census Record Details

Census Year	1940
Location	Coos-County, Oregon
Surname	Olsen
Given Name	Mary
Relationship to Head	Head
Sex	F
Color / Race	White
Age	57
Marital Status	Widowed
Birthplace	Washington
1935 Residence (City)	division of county 28 Fat Elk
1935 Residence (County)	Coos
Additional Details
Occupation	manager
Industry	Dairy Ranch
Class of Worker	OA
Income (1939)	0
Highest Grade	No 6
1935 Residence	Same house
Birth State	Washington
Birth Country	United States
Birthplace (normalized)	washington
Occupation	Manager
Township / Ward	Division Of County 28 Fat Elk
Est. Birth Year	~1883

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
Basil Olsen	Son	—	22	~1918
Roy Detillion	Other	—	38	~1902
Mary Olsen	Head	—	57	~1883
Rosetta Olsen	Daughter	—	3	~1937

Census Appearances

1920

Coos, Oregon

Spouse, age 38

Coos, Oregon · implied b. ~1882 — 5 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Olson
Given Name	Mary E
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	38
Marital Status	Married
Birthplace	Washington
Father's Birthplace	Washington
Mother's Birthplace	Minnesota
Occupation	none
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Birth State	Washington
Birth Country	United States
Birthplace (normalized)	washington

1930

Coos, Oregon

Other, age 48

Coos, Oregon · implied b. ~1882 — 45 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Olsen
Given Name	Mary
Relationship to Head	Wife-H
Sex	F
Color / Race	White
Age	48
Marital Status	Married
Birthplace	Washington
Age at First Marriage	16
Father's Birthplace	Minnesota
Mother's Birthplace	Minnesota
Can Read/Write	Yes
Birth State	Washington
Birth Country	United States
Birthplace (normalized)	washington

1940

Coos-County, Oregon

Head, age 57

Coos-County, Oregon · implied b. ~1883 — 4 household members

Surname	Olsen
Given Name	Mary
Relationship to Head	Head
Sex	F
Color / Race	White
Age	57
Marital Status	Widowed
Birthplace	Washington
1935 Residence (City)	division of county 28 Fat Elk
1935 Residence (County)	Coos
Occupation	manager
Industry	Dairy Ranch
Class of Worker	OA
Income (1939)	0
Highest Grade	No 6
1935 Residence	Same house
Birth State	Washington
Birth Country	United States
Birthplace (normalized)	washington

Model Tree

Linked across censuses

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

Show:

This person

Anchor record

Mary Olsen

Head · 1940 · age 57 · b. ~1883 · Oregon

★ You are viewing this record

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

Original Census Page

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

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-03358-00664)

Line	Name	Age	Relation	Occupation	Birthplace
1	Kay Doyle	4	daughter	—	Nebraska
2	Mona Doyle	8	daughter	—	Oregon
3	Edward S. Dettlefsen	54	Head	Dairyman	Germany
4	Marguerite Dettlefsen	50	wife	—	Germany
5	Howard Dettlefsen	23	Son	Ranch Hand	Oregon
6	Ernest Dettlefsen	20	Son	—	Oregon
7	Ronda Johnson	28	Head	Ranch Hand	N. Carolina
8	Mary Johnson	23	wife	—	Virginia
9	Elsie Johnson	7	daughter	—	Virginia
10	Leota Johnson	5	daughter	—	Virginia
11	Louise Johnson	3	daughter	—	Virginia
12	Ray Dettlefsen	28	Head	Farmer	Oregon
13	Frances Dettlefsen	27	wife	—	Oregon
14	Patricia Dettlefsen	5	daughter	—	Oregon
15	Arnold Willson	56	Head	Farmer	Nebraska
16	Bertie Willson	52	wife	—	Arkansas
17	Ralph Willson	21	Son	Assistant Cheesemaker	Colorado
18	Wanda Willson	15	daughter	—	Oregon
19	Mary Anderson	62	Head	Manager	Illinois
20	Graydon Anderson	27	Son	Farmer	Oregon
21	Darrell Anderson	24	Son	Farmer	Oregon
22	Ellis Barklow	24	Head	Laborer	Oregon
23	Hazel Barklow	22	wife	—	Oregon
24	Rose Marie Barklow	1	daughter	—	Oregon
25	Ithamer Robison	56	Head	Farmer	Oregon
26	Lola Robison	48	wife	—	Oregon
27	Josephine Robison	20	daughter	—	Oregon
28	Ithamer Robison	17	Son	Laborer	Oregon
29	Wendell Robison	1	Grandson	—	Oregon
30	Gene Robison	25	Head	Cheesemaker	Oregon
31	Marjorie Robison	21	wife	—	Oregon
32	Extra Line	None	—	—	—
33	John Mchair	54	Head	Farm Hand	Colorado
34	Lena Mchair	50	wife	—	Colorado
35	Laura Mchair	19	daughter	Maid	Oregon
36	Extra Line	None	—	—	—
37	Mary Olsen THIS PERSON	57	Head	Manager	Washington
38	Basil Olsen	22	Son	Carpenter	Oregon
39	Rosetta Olsen	3	daughter	—	Oregon
40	Roy Detillion	38	Hired Hand	Farm Hand	Washington

Related Census Records

(household member (Spouse))

Search for Mary Olsen

All Mary Olsen Census Records Discover Olsen Family Tree

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)

Report inaccurate data