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John Fitzgerald — 1940 US Census Record

Linked across censuses

1940 United States Federal Census · Union-County, South Dakota

Our Model Tree links this John Fitzgerald across the 1930 and 1940 US Censuses in Union-County, South Dakota (XGBoost, ~Confirmed) — first a head (b.~1893), then head of a 11-person household.

Age 47 b. ~1893 Male Head Born: South Dakota Married

1940 Census Record Details

Census Year1940
LocationUnion-County, South Dakota
SurnameFitzgerald
Given NameJohn J.
Relationship to HeadHead
SexM
Color / RaceWhite
Age47
Marital StatusMarried
BirthplaceSouth Dakota
1935 Residence (City)Emmett Township
1935 Residence (County)Union
Additional Details
OccupationFarmer
IndustryGrain & Stock farm
Class of WorkerOA
Hours Worked60
Income (1939)0
Highest Grade8
1935 ResidenceSame place
Birth StateSouth Dakota
Birth CountryUnited States
Birthplace (normalized)south dakota
OccupationFarmer
Township / WardEmmett Township
Est. Birth Year~1893

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.

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

Name Relation to head Relative to John Age Birth yr
Marjorie Fitzgerald Daughter — 3 ~1937
Lucile Fitzgerald Daughter — 11 ~1929
Violet Fitzgerald Daughter — 5 ~1935
Marcella Fitzgerald Daughter — 12 ~1928
Mildred Fitzgerald Daughter — 9 ~1931
Veronica Fitzgerald Daughter — 7 ~1933
Helen Fitzgerald Daughter — 14 ~1926
John Fitzgerald Head — 47 ~1893
Leo Fitzgerald Son — 16 ~1924
Edmond Fitzgerald Son — 20 ~1920
Theresa Fitzgerald Spouse — 40 ~1900

Census Appearances

1930
Union, South …
Other, age 37
Union, South Dakota · implied b. ~1893 — 46 household members
●  Primary link · ~Confirmed · 2 sources
XGBoost Household
Surname Fitzgerald
Given Name John J.
Relationship to Head O
Sex M
Color / Race White
Age 37
Marital Status Married
Birthplace South Dakota
Age at First Marriage 27
Father's Birthplace Irish Free State
Mother's Birthplace Illinois
Occupation Farmer
Industry General farm
Class of Worker W
Can Read/Write Yes
Birth State South Dakota
Birth Country United States
Birthplace (normalized) south dakota
1940
Union-County, South …
Head, age 47
Union-County, South Dakota · implied b. ~1893 — 11 household members
Surname Fitzgerald
Given Name John J.
Relationship to Head Head
Sex M
Color / Race White
Age 47
Marital Status Married
Birthplace South Dakota
1935 Residence (City) Emmett Township
1935 Residence (County) Union
Occupation Farmer
Industry Grain & Stock farm
Class of Worker OA
Hours Worked 60
Income (1939) 0
Highest Grade 8
1935 Residence Same place
Birth State South Dakota
Birth Country United States
Birthplace (normalized) south dakota

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 John Fitzgerald across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Fitzgerald
Head · 1940 · age 47 · b. ~1893 · South Dakota
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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 — Union-County, South Dakota Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-03869-00233)

Line Name Age Relation Occupation Birthplace
1 Clarence M. Andrews 38 Head Farmer Minnesota
2 Clara M. Andrews 33 Wife — Iowa
3 Melvin O. Andrews 14 Son Laborer South Dakota
4 Donald C. Andrews 13 Son — South Dakota
5 Emil J. Stene 47 Head Farmer South Dakota
6 Ida V. Stene 42 Wife — South Dakota
7 Joan E. Stene 17 Daughter — South Dakota
8 Elwood L. Stene 15 Son Laborer South Dakota
9 Harlan L. Stene 12 Son — South Dakota
10 Delmer O. Stene 9 Son — South Dakota
11 V. Adele Stene 6 Daughter — South Dakota
12 Howard L. Stene 2 Son — South Dakota
13 Otto Nygard 61 Head Farmer Iowa
14 Alma Nygard 59 Wife — South Dakota
15 John J. Fitzgerald THIS PERSON 47 Head Farmer South Dakota
16 Theresa H. Fitzgerald 40 Wife — South Dakota
17 Edmond J. Fitzgerald 20 Son Laborer South Dakota
18 Leo H. Fitzgerald 16 Son Laborer South Dakota
19 Helen T. Fitzgerald 14 Daughter — South Dakota
20 Marcella M. Fitzgerald 12 Daughter — South Dakota
21 Lucile M. Fitzgerald 11 Daughter — South Dakota
22 Mildred A. Fitzgerald 9 Daughter — South Dakota
23 Veronica A. Fitzgerald 7 Daughter — South Dakota
24 Violet L. Fitzgerald 5 Daughter — South Dakota
25 Marjorie L. Fitzgerald 3 Daughter — South Dakota
26 Ole E. Stene 42 Head Farmer South Dakota
27 Thorl J. Seglem 33 Hired hand Laborer Iowa
28 Lavina Seglem 35 Wife — Nebraska
29 Joyce A. Seglem 12 Daughter — Iowa
30 Donald G. Seglem 10 Son — South Dakota
31 Delano F. Seglem 6 Son — South Dakota
32 Mikel Ustad 68 Head Farmer Norway
33 Inga H. Ustad 60 Wife — Michigan
34 Gilbert Ustad 36 Head Farmer South Dakota
35 Mildred L.S. Ustad 26 Wife — South Dakota
36 Elmer R. Behnke 47 Head Farmer South Dakota
37 Gladys M. Behnke 43 Wife — Iowa
38 Robert E. Behnke 20 Son Laborer Iowa
39 Howard E. Behnke 18 Son — South Dakota
40 Vera M. Behnke 15 Daughter — South Dakota

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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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