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James Jensen — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Alameda-County, California

Our Model Tree links this James Jensen across the 1930 and 1940 US Censuses in Alameda-County, California (XGBoost, ~Confirmed) — first a son (b.~1924), then head of a 8-person household.

Age 16 b. ~1924 Male Son Born: California Single

1940 Census Record Details

Census Year1940
LocationAlameda-County, California
SurnameJensen
Given NameJames Jr.
Relationship to HeadSon
SexM
Color / RaceWhite
Age16
Marital StatusSingle
BirthplaceCalifornia
1935 Residence (City)Livermore City
1935 Residence (County)Alameda
Additional Details
Industry20
Highest GradeNo 8
1935 ResidenceSame Place
Birth StateCalifornia
Birth CountryUnited States
Birthplace (normalized)california
Township / WardLivermore City
Est. Birth Year~1924

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 James Age Birth yr
Alice Jensen Spouse — 41 ~1899
Marie Jensen Daughter — 13 ~1927
Helen Vera Daughter — 9 ~1931
Le Jensen Son — 15 ~1925
James Jensen Head — 51 ~1889
James Jensen Son — 16 ~1924
Howard Jensen Son — 17 ~1923
Walter Jensen Son — 10 ~1930

Census Appearances

1930
Alameda, California
Son, age 6
Alameda, California · implied b. ~1924 — 6 household members
●  Primary link · ~Confirmed · 2 sources
XGBoost Household
Surname Jensen
Given Name James C
Relationship to Head Son
Sex M
Color / Race White
Age 6
Marital Status Single
Birthplace California
Father's Birthplace California
Mother's Birthplace California
Birth State California
Birth Country United States
Birthplace (normalized) california
1940
Alameda-County, California
Son, age 16
Alameda-County, California · implied b. ~1924 — 8 household members
Surname Jensen
Given Name James Jr.
Relationship to Head Son
Sex M
Color / Race White
Age 16
Marital Status Single
Birthplace California
1935 Residence (City) Livermore City
1935 Residence (County) Alameda
Industry 20
Highest Grade No 8
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 James Jensen across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
James Jensen
Son · 1940 · age 16 · b. ~1924 · California
★ You are viewing this record
Sibling
Marie Jensen
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Le Jensen
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Walter Jensen
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Howard Jensen
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Vera
Sibling · 1940 · age 9
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-t0627-00186-00036)

Line Name Age Relation Occupation Birthplace
1 Robert Valponi 14 Son — California
2 Betty Jean Valponi 12 Daughter — California
3 Byron Wallace Gamble 32 Head Powder Man Wisconsin
4 Margaret Gamble 31 Wife — California
5 Daniel Lee Gamble 0 Son — California
6 Dennis Higara 66 Head — California
7 James Jr. Jensen 51 Head Laborer Denmark
8 Alice Jensen 41 Wife — Pennsylvania
9 Howard Jensen 17 Son — California
10 James Jr. Jensen THIS PERSON 16 Son — California
11 Le Roy Jensen 15 Son — California
12 Walter Jensen 10 Son — California
13 Marie Jensen 13 Daughter — California
14 Helen Vera 9 Daughter — California
16 Natalino Zappina 39 Head Laborer Italy
17 Angela Zappina 62 Wife — Italy
18 Julius Favilla 36 Head Lineman California
19 Elsa Favilla 31 Wife — Italy
20 Juleda Favilla 5 Daughter — California
21 Julius Favilla 2 Son — California
22 Emil Ward Rucker 41 Head Waiter California
23 Maud Rucker 39 Wife — Illinois
24 Jack Gallagher 15 Stepson — California
25 John Ravazzini 47 Head Gardner Italy
26 Anita Ravazzini 37 Wife Gardner Italy
27 Cleo Ravazzini 17 Daughter — California
28 Mary Ravazzini 15 Daughter — California
29 Deloris Ravazzini 12 Daughter — California
30 John George Ravazzini 4 Son — California
31 Georgia Alice Awen 74 Head — Kentucky
32 Florence E. Williams 52 Head Boarding Children Kentucky
33 Samuel B. Williams 19 Son Salesman Kentucky
34 John Thomas Noonan 5 Lodger — Iowa
35 Jimmie Topley 3 Lodger — Missouri
36 Russell L. Hockinson 24 Head Carpenter California
37 Beverley Hockinson 21 Wife — California
38 Russell Jr. Hockinson 2 Son — California
39 Julia Sangmaster 64 Head — California
40 Catherine Pirata 82 Head — Italy

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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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