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Robert Olson — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Alameda-County, California

Our Model Tree links this Robert Olson across the 1930 and 1940 US Censuses in Alameda-County, California (XGBoost, ~Confirmed) — first a son (b.~1928), then head of a 8-person household.

Age 12 b. ~1928 Male Son Born: California Single

1940 Census Record Details

Census Year1940
LocationAlameda-County, California
SurnameOlson
Given NameRobert J
Relationship to HeadSon
SexM
Color / RaceWhite
Age12
Marital StatusSingle
BirthplaceCalifornia
1935 Residence (City)Berkeley
1935 Residence (County)Alameda
Additional Details
Highest Grade6
1935 ResidenceSame place
Birth StateCalifornia
Birth CountryUnited States
Birthplace (normalized)california
Township / WardBerkeley
Est. Birth Year~1928

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.

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

Name Relation to head Relative to Robert Age Birth yr
Tom Elliott Son — 7 ~1933
Kathrine Elliott Other — 53 ~1887
Robert Olson Son — 12 ~1928
Lawrence Olson Son — 13 ~1927
Clara Olson Spouse — 31 ~1909
James Olson Son — 10 ~1930
Lawrence Olson Head — 33 ~1907
Carolyn Olson Daughter — 8 ~1932

Census Appearances

1930
Alameda, California
Son, age 1
Alameda, California · implied b. ~1929 — 4 household members
●  Primary link · ~Confirmed · 2 sources
XGBoost Household
Surname Olsen
Given Name Robert E
Relationship to Head Son
Sex M
Color / Race White
Age 1
Marital Status Single
Birthplace California
Father's Birthplace Illinois
Mother's Birthplace New Jersey
Birth State California
Birth Country United States
Birthplace (normalized) california
1940
Alameda-County, California
Son, age 12
Alameda-County, California · implied b. ~1928 — 8 household members
Surname Olson
Given Name Robert J
Relationship to Head Son
Sex M
Color / Race White
Age 12
Marital Status Single
Birthplace California
1935 Residence (City) Berkeley
1935 Residence (County) Alameda
Highest Grade 6
1935 Residence Same place
Birth State California
Birth Country United States
Birthplace (normalized) california

Model Tree

An inferred pedigree reconstructed from census links — up to 4 generations within the 1900–1950 window. Closer generations are built from household co-residence; deeper ones are bridged by following a relative to their own childhood census. Confidence compounds and weakens with each generation.
Linked across censuses
Our Model Tree links Robert Olson across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Robert Olson
Son · 1940 · age 12 · b. ~1928 · California
★ You are viewing this record
Sibling
Lawrence Olson
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Tom Elliott
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Olson
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Carolyn Olson
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
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

39 people indexed on this census page (nara:1940:m-t0627-00188-00465)

Line Name Age Relation Occupation Birthplace
41 Cecil S Mccollom 29 Head Record Clerk Washington
42 Helen A Mccollom 23 Wife — Pennsylvania
43 Marianne M Mccollom 1 Daughter — California
44 Arbbella M Butterfield 65 Mother-in-law — England
45 Fredrick A Lope 31 Head Shipping Clerk Oregon
46 Margaret Lope 32 Wife — California
47 Shirley M Lope 5 Daughter — California
48 Fredrick A Lope 3 Son — California
49 James W Wilkerson 44 Head Salesman Missouri
50 Caroline Wilkerson 37 Wife — New York
51 Frederick E Martin 28 Head Agent Pennsylvania
52 Maryon H Martin 26 Wife — California
53 Arthur A Ojala 32 Head Pricey California
54 Hilma E Ojala 30 Wife — California
55 Jean R Ojala 5 Daughter — California
56 Tom J Elliott 34 Head Salesman England
57 Frances M Elliott 30 Wife — California
58 Mervin T Elliott 14 Son — California
59 Richard D Hinds 35 Head Tester California
60 Lucile M Hinds 36 Wife — Missouri
61 Vera L Dixon 49 Head Forelady California
62 James Marita A Dixon 32 Sister Bookkeeper California
63 Roy L Dixon 24 Nephew Shipping Clerk California
64 June L Dixon 22 Daughter New Worker Oregon
65 Faye L Dixon 17 Daughter — California
66 Lawrence H Olson 33 Head Roofer Minnesota
67 Clara J Olson 31 Wife — Wisconsin
68 Lawrence H Olson 13 Son — California
69 Robert J Olson THIS PERSON 12 Son — California
70 James R Olson 10 Son — California
71 Carolyn J Olson 8 Daughter — California
72 Tom J Elliott 7 Son — California
73 Kathrine A Elliott 53 Mother — Irish Free State
74 William J Chappelka 76 Head Salesman Ohio
75 Clara Chappelka 72 Wife — Ohio
76 Shannon B Taylor 24 Head Barber Wyoming
77 Helen E Taylor 22 Wife Do Pennsylvania
78 Diane S Taylor 4 Daughter — Colorado
79 Marilyn R Taylor 2 Daughter — California

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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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