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William Post — 1940 US Census Record

Linked across censuses

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

Our Model Tree links this William Post across the 1930 and 1940 US Censuses in Brookings-County, South Dakota (XGBoost, ~Confirmed) — first a son (b.~1907), then head of a 6-person household.

Age 33 b. ~1907 Male Son Born: Iowa Single

1940 Census Record Details

Census Year1940
LocationBrookings-County, South Dakota
SurnamePost
Given NameWilliam
Relationship to Headson
SexM
Color / RaceWhite
Age33
Marital StatusSingle
BirthplaceIowa
1935 Residence (City)Volga City
1935 Residence (County)Brookings
Additional Details
Occupationtrucker
Industrycattle buyer
Class of WorkerPW
Hours Worked54
Income (1939)420
Highest GradeNo 1
1935 ResidenceSame place
Birth StateIowa
Birth CountryUnited States
Birthplace (normalized)iowa
OccupationTrucker
Township / WardVolga City
Est. Birth Year~1907

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.

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

Name Relation to head Relative to William Age Birth yr
Nellie Post Daughter — 14 ~1926
Daphne Post Head — 52 ~1888
Jacob Post Son — 20 ~1920
William Post Son — 33 ~1907
Clara Post Daughter — 17 ~1923
Peter Post Son — 31 ~1909

Census Appearances

1930
Brookings, South …
Other, age 22
Brookings, South Dakota · implied b. ~1908 — 4 household members
●  Primary link · ~Confirmed · 2 sources
XGBoost Household
Surname Post
Given Name William
Relationship to Head Boarder
Sex M
Color / Race White
Age 22
Marital Status Single
Birthplace Iowa
Father's Birthplace Holland
Mother's Birthplace Michigan
Occupation Laborer
Industry General Farm
Class of Worker W
Can Read/Write Yes
Veteran No
Birth State Iowa
Birth Country United States
Birthplace (normalized) iowa
1940
Brookings-County, South …
Son, age 33
Brookings-County, South Dakota · implied b. ~1907 — 6 household members
Surname Post
Given Name William
Relationship to Head son
Sex M
Color / Race White
Age 33
Marital Status Single
Birthplace Iowa
1935 Residence (City) Volga City
1935 Residence (County) Brookings
Occupation trucker
Industry cattle buyer
Class of Worker PW
Hours Worked 54
Income (1939) 420
Highest Grade No 1
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 William Post across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Post
Son · 1940 · age 33 · b. ~1907 · South Dakota
★ You are viewing this record
Sibling
Jacob Post
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Clara Post
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Peter Post
Sibling · 1940 · age 31
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Nellie Post
Sibling · 1940 · age 14
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 — Brookings-County, South Dakota Open full size

Page Contents

40 people indexed on this census page (nara:1940:m-t0627-03848-00803)

Line Name Age Relation Occupation Birthplace
1 Daphne Post 52 Head — Iowa
2 William Post THIS PERSON 33 son Trucker Iowa
3 Peter Post 31 son Laborer Iowa
4 Jacob Post 20 son Laborer S. Dak.
5 Clara Post 17 daughter Maid S. Dak.
6 Nellie Post 14 daughter — S. Dak.
7 Ellen Krumm 68 Head — Iowa
8 Ethel Krumm 43 daughter Teacher Iowa
9 Ruth Krumm 25 daughter Egg Candler S. Dak.
10 Engebret Shefte 45 Head Dentist Norway
11 Lora Shefte 43 wife — S. Dak.
12 Duane Shefte 18 son — S. Dak.
13 Lois Shefte 15 daughter — S. Dak.
14 Charles Lee 48 Head Cashier S. Dak.
15 Amy Lee 45 wife — Iowa
16 Richard Lee 22 son Teller S. Dak.
17 Howard Lee 20 son — S. Dak.
18 Walter Lee 18 son — S. Dak.
19 Harriet Lee 16 daughter — S. Dak.
20 Lawrence Lee 13 son — S. Dak.
21 Ruth Ann Lee 3 daughter — S. Dak.
22 Sophia Thompson 25 maid Maid S. Dak.
23 Ralph Breeschoten 32 Head Mechanic S. Dak.
24 Nellie Breeschoten 29 wife Practical Nurse S. Dak.
25 Robert Breeschoten 2 son — S. Dak.
26 Sidney Vastad 34 Head Trucker Iowa
27 Lillian Vastad 33 wife — Illinois
28 John Vastad 5 son — S. Dak.
29 Mark Holm 42 Head Janitor S. Dak.
30 Eunice Holm 35 wife Cook S. Dak.
31 Curtis Holm 16 son — S. Dak.
32 Roland Holm 14 son — S. Dak.
33 Merlynn Holm 9 daughter — S. Dak.
34 Gerrit De Knikker 30 Head Trucker Iowa
35 Emma De Knikker 29 wife — S. Dak.
36 Kenneth De Knikker 8 son — S. Dak.
37 Lyle De Knikker 6 son — S. Dak.
38 Darrel De Knikker 4 son — S. Dak.
39 Dorothy De Knikker 2 daughter — S. Dak.
40 Cornelius Baan 49 Head Laborer Holland

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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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