Mary Daniels — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · King-County, Washington

Our Model Tree links this Mary Daniels across the 1920, 1930 and 1940 US Censuses in King-County, Washington (XGBoost, ~Confirmed) — first a spouse (b.~1888), then head of a 3-person household.

Age 52 b. ~1888 Female Spouse Born: Sweden Married

1940 Census Record Details

Census Year	1940
Location	King-County, Washington
Surname	Daniels
Given Name	Mary
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	52
Marital Status	Married
Birthplace	Sweden
1935 Residence (City)	Mercer Island
1935 Residence (County)	King
Naturalization Status	Naturalized
Additional Details
Highest Grade	Hs 2
1935 Residence	Same place
Birth Country	Sweden
Birthplace (normalized)	sweden
Township / Ward	Mercer Island
Est. Birth Year	~1888

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.

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

Name	Relation to head	Relative to Mary	Age	Birth yr
Olaf Daniels	Head	—	52	~1888
Olaf Daniels	Son	—	20	~1920
Mary Daniels	Spouse	—	52	~1888

Census Appearances

1920

King, Washington

Spouse, age 32

King, Washington · implied b. ~1888 — 3 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Daniels
Given Name	May M.
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	32
Marital Status	Married
Birthplace	Sweden
Year of Immigration	1907
Naturalization Status	Alien
Father's Birthplace	Sweden
Mother's Birthplace	Sweden
Occupation	none
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Mother Tongue	Swedish
Birth Country	Sweden
Birthplace (normalized)	sweden

1930

King, Washington

Spouse, age 42

King, Washington · implied b. ~1888 — 4 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Daniels
Given Name	Marie S
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	42
Marital Status	Married
Birthplace	Sweden
Naturalization Status	Alien
Year of Immigration	1907
Age at First Marriage	21
Father's Birthplace	Sweden
Mother's Birthplace	Sweden
Can Read/Write	Yes
Mother Tongue	Swedish
Veteran	No
Birth Country	Sweden
Birthplace (normalized)	sweden

1940

King-County, Washington

Spouse, age 52

King-County, Washington · implied b. ~1888 — 3 household members

Surname	Daniels
Given Name	Mary
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	52
Marital Status	Married
Birthplace	Sweden
1935 Residence (City)	Mercer Island
1935 Residence (County)	King
Naturalization Status	Naturalized
Highest Grade	Hs 2
1935 Residence	Same place
Birth Country	Sweden
Birthplace (normalized)	sweden

Model Tree

Linked across censuses

Our Model Tree links Mary Daniels 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 Daniels

Spouse · 1940 · age 52 · b. ~1888 · Washington

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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 — King-County, Washington Open full size

Page Contents

39 people indexed on this census page (nara:1940:m-t0627-04345-00323)

Line	Name	Age	Relation	Occupation	Birthplace
1	Olaf B Daniels	52	Head	Contractor	Sweden
2	Mary Daniels THIS PERSON	52	Wife	—	Sweden
3	Olaf Paul Daniels	20	Son	Building	Washington
4	William Crockett	25	Head	Mechanic	Washington
5	Angeline Crockett	24	Wife	—	Washington
6	Ronald Crockett	0	Son	—	Washington
7	Carl V Larson	37	Head	Salesman	Washington
8	Elizabeth Larson	40	Wife	—	Washington
9	John W. Larson	10	Son	—	Washington
10	Carl Jr. Larson	10	Son	—	Washington
11	Howard R. Horan	40	Head	Dept Head	California
12	Anna M. Horan	35	Wife	—	Oregon
13	E. Gus. Sundfelt	45	Head	Salesman	Minnesota
14	Faith Sundfelt	39	Wife	—	Washington
15	Delia May Sundfelt	8	Daughter	—	Washington
16	John A. Sundfelt	6	Son	—	Washington
17	James R. Carr	74	Head	Carpenter	Iowa
18	Ellen S Carr	68	Wife	—	Virginia
19	Clarence W Carr	32	Son	Concession Man	Washington
20	Alice May Fletcher	51	Head	Promotional	British Columbia
21	George D. Valentine	27	Head	Harbormaster	Minnesota
22	Germaine Valentine	22	Wife	—	Minnesota
23	Wayne Sutton	49	Head	Contractor	Washington
24	Florence Sutton	44	Wife	—	Massachusetts
25	Frank Clark	27	Head	Iron Worker	Washington
26	Gertrude Clark	27	Wife	—	Washington
27	Patricia Clark	8	Daughter	—	Washington
28	Frankie Clark	5	Son	—	Washington
29	Margaret Clark	2	Daughter	—	Washington
30	Frederick Murphy	43	Head	Engineer	Washington
31	Marion Murphy	41	Wife	—	Washington
32	Laura Mcmonagle	74	Head	—	Tennessee
33	Grace Mcmonagle	48	Daughter	Nurse	Washington
34	John Dunney	49	Head	Salesman	Massachusetts
35	Grace Dunney	40	Wife	Saleswoman	Massachusetts
36	Mary E O'Connell	71	Mother in law	—	Massachusetts
37	A. Charles Hansen	56	Head	Accountant	England
38	Martha C. Hansen	65	Wife	—	Illinois
39	Olsen Frank Hansen	47	Hired Hand	Truck Driver	Washington

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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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