Martha Johnson — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Los-Angeles-County, California

Our Model Tree links this Martha Johnson across the 1920, 1930 and 1940 US Censuses in Los-Angeles-County, California (XGBoost, ~Confirmed) — first a spouse (b.~1900), then head of a 3-person household.

Age 40 b. ~1900 Female Spouse Born: Finland Married

1940 Census Record Details

Census Year	1940
Location	Los-Angeles-County, California
Surname	Johnson
Given Name	Martha
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	40
Marital Status	Married
Birthplace	Finland
1935 Residence (City)	Los Angeles City
1935 Residence (County)	Los Angeles County
Naturalization Status	Naturalized
Additional Details
Highest Grade	No 4
1935 Residence	Same House
Birth Country	Finland
Birthplace (normalized)	finland
Township / Ward	Los Angeles City
Est. Birth Year	~1900

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 Martha	Age	Birth yr
Howard Johnson	Daughter	—	12	~1928
Swan Johnson	Head	—	49	~1891
Martha Johnson	Spouse	—	40	~1900

Census Appearances

1920

Randolph, Indiana

Spouse, age 21

Randolph, Indiana · implied b. ~1899 — 3 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Johnson
Given Name	Martha
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	21
Marital Status	Married
Birthplace	Finland
Year of Immigration	1911
Naturalization Status	Alien
Father's Birthplace	Finland
Mother's Birthplace	Finland
Occupation	none
Can Read	Yes
Can Write	Yes
Speaks English	Yes
Mother Tongue	Finnish
Birth Country	Finland
Birthplace (normalized)	finland

1930

Los Angeles, …

Spouse, age 30

Los Angeles, California · implied b. ~1900 — 3 household members

● Primary link · ~Confirmed · 2 sources

XGBoost Household

Surname	Johnson
Given Name	Martha
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	30
Marital Status	Married
Birthplace	Finland
Naturalization Status	Naturalized
Year of Immigration	1912
Age at First Marriage	22
Father's Birthplace	Finland
Mother's Birthplace	Finland
Can Read/Write	Yes
Mother Tongue	Finnish
Birth Country	Finland
Birthplace (normalized)	finland

1940

Los-Angeles-County, California

Spouse, age 40

Los-Angeles-County, California · implied b. ~1900 — 3 household members

Surname	Johnson
Given Name	Martha
Relationship to Head	Wife
Sex	F
Color / Race	White
Age	40
Marital Status	Married
Birthplace	Finland
1935 Residence (City)	Los Angeles City
1935 Residence (County)	Los Angeles County
Naturalization Status	Naturalized
Highest Grade	No 4
1935 Residence	Same House
Birth Country	Finland
Birthplace (normalized)	finland

Model Tree

Linked across censuses

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

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This person

Anchor record

Martha Johnson

Spouse · 1940 · age 40 · b. ~1900 · 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 — Los-Angeles-County, California Open full size

Page Contents

39 people indexed on this census page (nara:1940:m-t0627-00403-00226)

Line	Name	Age	Relation	Occupation	Birthplace
1	Lorene Brannon	25	Wife	—	Texas
2	Joan Brannon	2	Daughter	—	California
3	Melvin Jr. Brannon	0	Son	—	California
4	Ella Craig	69	Head	—	Ohio
5	Emma Kelly	87	Mother	—	Illinois
6	W. Roy Bray	35	Head	Asst Central Operator	California
7	E. Bernice Bray	36	Wife	Bookkeeper	Missouri
8	John B. Enright	15	Step son	—	Missouri
9	Leo E. Enright	14	Step son	—	Missouri
10	Frances Brown	48	Head	Draper	Scotland
11	Ina Brown	47	Sister	Power Machine Operator	Scotland
12	Swan Johnson	49	Head	Painter	Sweden
13	Martha Johnson THIS PERSON	40	Wife	—	Finland
14	Howard Johnson	12	Daughter	—	California
15	John Kalske	66	Head	Sailor	Finland
16	Anna M. Kalske	62	Wife	—	Finland
17	Emie Bald	66	Head	—	Scotland
18	Angelo Arkadis	48	Head	Fruit Salesman	Greece
19	Rose O. Arkadis	43	Wife	—	Tennessee
20	Mary Flahive	76	Lodger	—	New York
21	Darling Birnbaum	41	Head	Piler Cutter	Poland
22	Mildred Birnbaum	33	Wife	Bookkeeper	New York
23	Theresa Remes	21	Sister-in-law	Bookkeeper	New York
24	Thomas Jarvis	54	Head	Watchmaker	Missouri
25	James H. Roberts	26	Head	Box Maker	Missouri
26	Dorothy Roberts	22	Wife	—	Nebraska
27	Edward Jones	37	Head	Welder	Missouri
28	Marie Jones	32	Wife	Office Clerk	Texas
29	Nicholas Karaly	22	Head	Barman	Rhode Island
30	Martha Karaly	19	Wife	—	California
31	John Robinson	28	Head	Clerk	Utah
32	Lillian Robinson	27	Wife	Stenographer	New Jersey
33	Joseph Scull	30	Head	Cook	New Jersey
34	Irene Scull	32	Wife	—	Pennsylvania
35	Ludwig Retyri	59	Head	—	Poland
36	Josephine Retyri	57	Wife	—	Poland
37	Edmund Retyri	23	Son	Cutter	California
38	Stephen Retyri	27	Son	Cutter	California
39	Sophie Swertz	67	Head	—	Russia

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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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