Ruby Johnson — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Alameda-County, California

Our Model Tree links this Ruby Johnson across the 1920, 1930 and 1940 US Censuses in Alameda-County, California (XGBoost, ~Confirmed) — first a spouse (b.~1897), then head of a 4-person household.

Age 43 b. ~1897 Female Spouse Born: Connecticut Married

1940 Census Record Details

Census Year	1940
Location	Alameda-County, California
Surname	Johnson
Given Name	Ruby
Relationship to Head	wife
Sex	F
Color / Race	White
Age	43
Marital Status	Married
Birthplace	Connecticut
1935 Residence (City)	Oakland
1935 Residence (County)	Alameda
Additional Details
Highest Grade	8
1935 Residence	Same house
Birth State	Connecticut
Birth Country	United States
Birthplace (normalized)	connecticut
Township / Ward	Oakland
Est. Birth Year	~1897

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 Ruby	Age	Birth yr
Mabel Johnson	Daughter	—	29	~1911
Harriet Johnson	Daughter	—	18	~1922
Robert Johnson	Head	—	51	~1889
Ruby Johnson	Spouse	—	43	~1897

Census Appearances

1920

Alameda, California

Spouse, age 23

Alameda, California · implied b. ~1897 — 2 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Johnson
Given Name	Ruby
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	23
Marital Status	Married
Birthplace	Connecticut
Father's Birthplace	England
Mother's Birthplace	Missouri
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Birth State	Connecticut
Birth Country	United States
Birthplace (normalized)	connecticut

1930

Alameda, California

Other, age 33

Alameda, California · implied b. ~1897 — 4 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Johnson
Given Name	Ruby
Relationship to Head	Wife-H
Sex	F
Color / Race	White
Age	33
Marital Status	Married
Birthplace	Connecticut
Age at First Marriage	18
Father's Birthplace	United States
Mother's Birthplace	United States
Can Read/Write	Yes
Birth State	Connecticut
Birth Country	United States
Birthplace (normalized)	connecticut

1940

Alameda-County, California

Spouse, age 43

Alameda-County, California · implied b. ~1897 — 4 household members

Surname	Johnson
Given Name	Ruby
Relationship to Head	wife
Sex	F
Color / Race	White
Age	43
Marital Status	Married
Birthplace	Connecticut
1935 Residence (City)	Oakland
1935 Residence (County)	Alameda
Highest Grade	8
1935 Residence	Same house
Birth State	Connecticut
Birth Country	United States
Birthplace (normalized)	connecticut

Model Tree

Linked across censuses

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

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This person

Anchor record

Ruby Johnson

Spouse · 1940 · age 43 · b. ~1897 · California

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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 — Alameda-County, California Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-00433-00724)

Line	Name	Age	Relation	Occupation	Birthplace
41	Hastings Bertha Hastings	37	wife	—	California
42	Shirley Ann Hastings	5	daughter	—	California
43	Daniel J. Mervin	41	head	Lineman	Michigan
44	Marguerite Mervin	35	wife	—	Colorado
45	Dana Richardson	66	head	Shipping Clerk	Tennessee
46	Gertrude Richardson	58	wife	—	California
47	Marjorie Richardson	25	daughter	Maid	California
48	Emelda Richardson	22	daughter	Secretary	California
49	Milton Richardson	19	son	Bookkeeper	California
50	James Richardson	16	son	—	California
51	Dan Richardson	12	son	—	California
52	Allegra Richardson	29	daughter	—	Illinois
53	Beverly Richardson	7	grand daughter	—	California
54	Donald Richison	36	head	Machine Dept Foreman	West Virginia
55	Esther Richison	26	wife	—	Kansas
56	Richard Richison	2	son	—	California
57	Marie Ipsen	45	head	—	California
58	Harvey Frank Ipsen	40	son	Traveling Salesman	Hawaii
59	Hazel Ipsen	19	daughter	Typist	California
60	Evelyn Ipsen	15	daughter	—	California
61	Marie Ipsen	11	daughter	—	California
62	John Costa	39	head	Laborer	Portugal
63	Tillie Costa	33	wife	Assembly Worker	Portugal
64	Gilda Costa	16	daughter	—	Rhode Island
65	Albert Costa	11	son	—	California
66	Manuel Joaquin	67	head	Moulder'S Helper	Portugal
67	Mary Joaquin	67	wife	—	Portugal
68	Josephine Joaquin	36	daughter	Cutter	Portugal
69	—	None	—	—	—
70	Michael A. Croker	55	head	Retail Salesman	Iowa
71	Gladys Croker	46	wife	—	Massachusetts
72	Francis Croker	15	son	—	Oahu, T.H.
73	Dorothy Croker	12	daughter	—	Samoa
74	Richard Croker	10	son	—	California
75	Robert Johnson	51	head	Painter	Connecticut
76	Ruby Johnson THIS PERSON	43	wife	—	Connecticut
77	Mabel Johnson	29	daughter	Stenographer	California
78	Harriet Johnson	18	daughter	—	California
79	James Harper	76	head	Jack-Of-All-Trades	New York
80	Marie Johnson	73	head	—	Norway

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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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