DC
David Clark — 1940 US Census Record
Model Tree available1940 United States Federal Census · Buffalo-County, South Dakota
Our Model Tree links this David Clark across the 1920, 1930 and 1940 US Censuses in Buffalo-County, South Dakota (XGBoost, ~Confirmed), with identified parents Daria & David — first a son (b.~1920), then head of a 4-person household.
Age 20
b. ~1920
Male
Son
Born: South Dakota
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Buffalo-County, South Dakota |
| Surname | Clark |
| Given Name | David W. Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | South Dakota |
| 1935 Residence (City) | Park Thompson |
| 1935 Residence (County) | Buffalo |
| Additional Details | |
| Occupation | Secretary |
| Industry | Library |
| Class of Worker | PW |
| Hours Worked | 1 |
| Income (1939) | 500 |
| Highest Grade | C-2 |
| 1935 Residence | Same House |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
| Occupation | Secretary |
| Township / Ward | Park Thompson |
| Est. Birth Year | ~1920 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to David | Age | Birth yr |
|---|---|---|---|---|
| Elisabeth Clark | Spouse | — | 47 | ~1893 |
| Elisabeth Clark | Daughter | — | 19 | ~1921 |
| David Clark | Son | — | 20 | ~1920 |
| Daria Clark | Head | — | 51 | ~1889 |
Census Appearances
1920
Buffalo, South …
Son, age
Buffalo, South Dakota · implied b. ~1920 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | David A. Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | South Dakota |
| Father's Birthplace | New York |
| Mother's Birthplace | Connecticut |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
1930
Buffalo, South …
Son, age 10
Buffalo, South Dakota · implied b. ~1920 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | David |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | South Dakota |
| Father's Birthplace | New York |
| Mother's Birthplace | Connecticut |
| Can Read/Write | Yes |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
1940
Buffalo-County, South …
Son, age 20
Buffalo-County, South Dakota · implied b. ~1920 — 4 household members
| Surname | Clark |
| Given Name | David W. Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | South Dakota |
| 1935 Residence (City) | Park Thompson |
| 1935 Residence (County) | Buffalo |
| Occupation | Secretary |
| Industry | Library |
| Class of Worker | PW |
| Hours Worked | 1 |
| Income (1939) | 500 |
| Highest Grade | C-2 |
| 1935 Residence | Same House |
| 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.
Our Model Tree links David Clark across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Daria Clark (~0.92 confidence) and father David Clark (~0.92 confidence) and father David Clark (~0.92 confidence) and mother E Clark (~0.92 confidence) and mother Elisabeth Clark (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Daria Clark
b. ~1889
Source father
● Household
· direct · ~0.92
Father
David Clark
b. ~1889
Source father
● Household
· direct · ~0.92
Father
David Clark
b. ~1889
Source father
● Household
· direct · ~0.92
Mother
E Clark
b. ~1893
Source mother
● Household
· direct · ~0.92
Mother
Elisabeth Clark
b. ~1893
Source mother
● Household
· direct · ~0.92
This person
Anchor record
David Clark
Son · 1940 · age 20 · b. ~1920 · South Dakota
★ You are viewing this record
Sibling
Elisabeth Clark
Sibling · 1940 · age 19
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 — Buffalo-County, South Dakota
Open full size
1940 US Federal Census — Buffalo-County, South Dakota
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03850-00041)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Louis D. Voss | 38 | Head | Laborer | South Dakota |
| 42 | Susie Voss | 43 | Wife | Attendant | South Dakota |
| 43 | Verdell V. Voss | 10 | Son | — | South Dakota |
| 44 | Selina Briggs | 70 | Mother | — | New York |
| 45 | Daria W. Clark | 51 | Head | Minister | New York |
| 46 | Elisabeth M. Clark | 47 | Wife | Social Worker | Connecticut |
| 47 | David W. Jr. Clark THIS PERSON | 20 | Son | Secretary | South Dakota |
| 48 | Elisabeth P. Clark | 19 | Daughter | — | South Dakota |
| 49 | Irene Hoskins | 25 | Head | Social Worker | Iowa |
| 50 | Arthur H. Burkholder | 52 | Roomer | Salesman | South Dakota |
| 51 | Elisabeth Burkholder | 49 | Roomer | Teacher | South Dakota |
| 52 | Nelson D. Jennessen | 31 | Head | Engineer | South Dakota |
| 53 | Hazel M. Jennessen | 25 | Wife | — | Nebraska |
| 54 | Barbara R. Jennessen | 5 | Daughter | — | South Dakota |
| 55 | Ja Nelsen | 4 | Son | — | South Dakota |
| 56 | Robert E. Nelsen | 3 | Son | — | South Dakota |
| 57 | Elizabeth Nelsen | 1 | Daughter | — | South Dakota |
| 58 | Henry Comes Flying | 39 | Head | Janitor | South Dakota |
| 59 | Philomine B. Comes Flying | 31 | Wife | — | South Dakota |
| 60 | Bertha Comes Flying | 13 | Daughter | — | South Dakota |
| 61 | George Comes Flying | 11 | Son | — | South Dakota |
| 62 | Nathaniel Comes Flying | 4 | Son | — | South Dakota |
| 63 | Elverda Comes Flying | 1 | Daughter | — | South Dakota |
| 64 | Stanley R. Fallis | 28 | Head | Light Plant | South Dakota |
| 65 | Viola G. Fallis | 25 | Wife | — | South Dakota |
| 66 | Joyce Fallis | 9 | Daughter | — | South Dakota |
| 67 | Donovan L. Fallis | 7 | Son | — | South Dakota |
| 68 | Alvin R. Fallis | 3 | Son | — | South Dakota |
| 69 | Yvonne G. Fallis | 1 | Son | — | South Dakota |
| 70 | Maurice La Roche | 29 | Head | Attendant | South Dakota |
| 71 | Florence La Roche | 25 | Wife | Attendant | South Dakota |
| 72 | Louis La Roche | 3 | Son | — | South Dakota |
| 73 | Exel La Roche | 1 | Daughter | — | South Dakota |
| 74 | Pearl Mcbride | 20 | Step-daughter | — | South Dakota |
| 75 | Pete Yellow Ear Ring | 32 | Head | Janitor | South Dakota |
| 76 | Gladys C. Yellow Ear Ring | 24 | Wife | — | South Dakota |
| 77 | Alyce L. Yellow Ear Ring | 8 | Daughter | — | South Dakota |
| 78 | Harold L. Withhorn | 12 | Step-son | — | South Dakota |
| 79 | Mae Bridge | 46 | Head | Teacher | Illinois |
| 80 | Margaret I. Price | 27 | Lodger | Teacher | South Dakota |
Pedigree Summary
David + 1 sibling
Gen 1 · 5 parents
~0.92
Max depth 4 (1900–1950 window)
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)