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Joseph Griffin — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Crawford-County, Iowa

Our Model Tree links this Joseph Griffin across the 1930 and 1940 US Censuses in Crawford-County, Iowa (XGBoost, ~Confirmed) — first a son (b.~1923), then head of a 7-person household.

Age 17 b. ~1923 Male Son Born: Iowa Single

1940 Census Record Details

Census Year1940
LocationCrawford-County, Iowa
SurnameGriffin
Given NameJoseph
Relationship to HeadSon
SexM
Color / RaceWhite
Age17
Marital StatusSingle
BirthplaceIowa
1935 Residence (City)Washington Twp.
1935 Residence (County)Crawford
Additional Details
OccupationHelper
IndustryFarm
Class of WorkerNP
Hours Worked60
Income (1939)0
Highest GradeNo 8
1935 ResidenceSame place
Birth StateIowa
Birth CountryUnited States
Birthplace (normalized)iowa
OccupationHelper
Township / WardWashington Twp
Est. Birth Year~1923

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.

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

Name Relation to head Relative to Joseph Age Birth yr
Clement Griffin Son — 13 ~1927
Mary Griffin Daughter — 19 ~1921
Therese Griffin Daughter — 8 ~1932
Joseph Griffin Son — 17 ~1923
Edna Griffin Spouse — 51 ~1889
Edna Griffin Daughter — 10 ~1930
Dennis Griffin Head — 54 ~1886

Census Appearances

1930
Crawford, Iowa
Son, age 6
Crawford, Iowa · implied b. ~1924 — 8 household members
●  Primary link · ~Confirmed · 2 sources
XGBoost Household
Surname Griffin
Given Name Joseph C.
Relationship to Head son
Sex M
Color / Race White
Age 6
Marital Status Single
Birthplace Iowa
Father's Birthplace Irish Free State
Mother's Birthplace Iowa
Occupation none
Birth State Iowa
Birth Country United States
Birthplace (normalized) iowa
1940
Crawford-County, Iowa
Son, age 17
Crawford-County, Iowa · implied b. ~1923 — 7 household members
Surname Griffin
Given Name Joseph
Relationship to Head Son
Sex M
Color / Race White
Age 17
Marital Status Single
Birthplace Iowa
1935 Residence (City) Washington Twp.
1935 Residence (County) Crawford
Occupation Helper
Industry Farm
Class of Worker NP
Hours Worked 60
Income (1939) 0
Highest Grade No 8
1935 Residence Same place
Birth State Iowa
Birth Country United States
Birthplace (normalized) iowa

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 Joseph Griffin across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Joseph Griffin
Son · 1940 · age 17 · b. ~1923 · Iowa
★ You are viewing this record
Sibling
Edna Griffin
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Clement Griffin
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Griffin
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Therese Griffin
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 — Crawford-County, Iowa Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-01152-00567)

Line Name Age Relation Occupation Birthplace
1 Joseph W. Bauman 62 Head Operator New York
2 Joe Bauman 34 Son Hired Hand Iowa
3 Nellie Bauman 31 Daughter — Iowa
4 Charley Stover 52 Head Operator Pennsylvania
5 Emma Stover 49 Wife — Kansas
6 Thomas Stover 20 Son Helper Iowa
7 Harry Stover 19 Son Helper Iowa
8 Ernest Lalone 39 Head Operator Iowa
9 Minnie Lalone 40 Wife — Iowa
10 Devon Lalone 15 Son — Iowa
11 Robert Lalone 10 Son — Iowa
12 Donna Mae Lalone 8 Daughter — Iowa
13 Elmer H Polzien 54 Head Operator Iowa
14 Cora Polzien 57 Wife — Iowa
15 Marvin Polzien 15 Son — Iowa
16 George Ahrenholtz 60 Head Operator Germany
17 Sophie Ahrenholtz 54 Wife — Iowa
18 Murl Ahrenholtz 27 Son Hired Hand Iowa
19 Earnest Ahrenholtz 25 Son Hired Hand Iowa
20 Dennis L. Griffin 54 Head Operator Irish Free State
21 Edna Griffin 51 Wife — Iowa
22 Mary Denice Griffin 19 Daughter Teacher Iowa
23 Joseph Griffin THIS PERSON 17 Son Helper Iowa
24 Clement Griffin 13 Son — Iowa
25 Edna E. Griffin 10 Daughter — Iowa
26 Therese Griffin 8 Daughter — Iowa
27 Marie Mallen 64 Head — Irish Free State
28 Frank Mallen 39 Son Operator Iowa
29 Leonard Mallen 33 Son Co-Operator Iowa
30 Rudolph Zimmerman 39 Head Operator Iowa
31 Lena Zimmerman 39 Wife — Iowa
32 Leo Zimmerman 8 Son — Iowa
33 Alfred Zimmerman 5 Son — Iowa
34 Irban Zimmerman 3 Son — Iowa
35 Herman L. Hast 33 Head Operator Iowa
36 Irene Hast 30 Wife — Iowa
37 Ferdanna Hast 5 Daughter — Iowa
38 Gottfried Brandle 54 Head Operator Germany
39 Joe Stoll 67 Head Operator Iowa
40 Margaret Stoll 55 Wife — Iowa

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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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