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Curtis Smith — 1940 US Census Record

Linked across censuses

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

Our Model Tree links this Curtis Smith across the 1930 and 1940 US Censuses in Sully-County, South Dakota (XGBoost, ~Confirmed) — first a son (b.~1925), then head of a 10-person household.

Age 15 b. ~1925 Male Son Born: South Dakota Single

1940 Census Record Details

Census Year1940
LocationSully-County, South Dakota
SurnameSmith
Given NameCurtis
Relationship to HeadSon
SexM
Color / RaceWhite
Age15
Marital StatusSingle
BirthplaceSouth Dakota
1935 Residence (City)Twp 113 R 80
1935 Residence (County)Sully
Additional Details
OccupationNew worker
Income (1939)0
Highest GradeG-8
1935 ResidenceSame place
Birth StateSouth Dakota
Birth CountryUnited States
Birthplace (normalized)south dakota
OccupationNew Worker
Township / WardTwp 113 R 80
Est. Birth Year~1925

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.

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

Name Relation to head Relative to Curtis Age Birth yr
Edna Smith Daughter — 11 ~1929
Curtis Smith Son — 15 ~1925
Eugene Smith Son — 10 ~1930
Richard Smith Son — 13 ~1927
Lowell Smith Son — 14 ~1926
Virginia Smith Daughter — 2 ~1938
Frances Smith Spouse — 34 ~1906
Clarence Smith Head — 47 ~1893
Cecil Smith Son — 8 ~1932
Donald Smith Son — 17 ~1923

Census Appearances

1930
Sully, South …
Son, age 5
Sully, South Dakota · implied b. ~1925 — 8 household members
●  Primary link · ~Confirmed · 2 sources
XGBoost Household
Surname Smith
Given Name Curtis
Relationship to Head Son
Sex M
Color / Race White
Age 5
Marital Status Single
Birthplace South Dakota
Father's Birthplace South Dakota
Mother's Birthplace Nebraska
Birth State South Dakota
Birth Country United States
Birthplace (normalized) south dakota
1940
Sully-County, South …
Son, age 15
Sully-County, South Dakota · implied b. ~1925 — 10 household members
Surname Smith
Given Name Curtis
Relationship to Head Son
Sex M
Color / Race White
Age 15
Marital Status Single
Birthplace South Dakota
1935 Residence (City) Twp 113 R 80
1935 Residence (County) Sully
Occupation New worker
Income (1939) 0
Highest Grade G-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 Curtis Smith across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Curtis Smith
Son · 1940 · age 15 · b. ~1925 · South Dakota
★ You are viewing this record
Sibling
Donald Smith
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Cecil Smith
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Virginia Smith
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eugene Smith
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Smith
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lowell Smith
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edna Smith
Sibling · 1940 · age 11
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 — Sully-County, South Dakota Open full size

Page Contents

32 people indexed on this census page (nara:1940:m-t0627-03868-00064)

Line Name Age Relation Occupation Birthplace
1 William F. Luecke 33 Head Farmer Missouri
2 Mary Luecke 30 Wife — Kansas
3 William T. Luecke 8 Son — South Dakota
4 Margaret I. Luecke 5 Daughter — South Dakota
5 John Luecke 2 Son — South Dakota
6 Bill Brick 37 Hired man Farm Labor South Dakota
7 Francis Heinemann 35 Head Farmer South Dakota
8 Ted Klemann 29 Head Farm Manager South Dakota
9 Mary Klemann 28 Wife — Iowa
10 Robert Klemann 1 Son — South Dakota
11 Anton Ziltener 31 Head Farmer Switzerland
12 Delores Ziltener 22 Wife — South Dakota
13 Clarence B. Smith 47 Head Farmer Nebraska
14 Frances Smith 34 Wife — South Dakota
15 Donald Smith 17 Son New Worker South Dakota
16 Curtis Smith THIS PERSON 15 Son New Worker South Dakota
17 Lowell Smith 14 Son — South Dakota
18 Richard Smith 13 Son — South Dakota
19 Edna Alice Smith 11 Daughter — South Dakota
20 Eugene Smith 10 Son — South Dakota
21 Cecil Smith 8 Son — South Dakota
22 Virginia May Smith 2 Daughter — South Dakota
23 Charles Luecke 35 Head Farmer Missouri
24 Floyd Baker 21 Hired man Farm Labor South Dakota
25 Henry Groschere 55 Head Farmer South Dakota
26 Florence Groschere 53 Wife — Minnesota
27 Roger Groschere 20 Son — South Dakota
28 James Groschere 19 Son Farm Labor South Dakota
29 William Groschere 17 Son — South Dakota
30 Paul Steffen 59 Head Farmer Iowa
31 Regina Steffen 54 Wife — Nebraska
32 Albert Steffen 27 Son Farm Labor 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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