HC
Harold Clark — 1940 US Census Record
Model Tree available1940 United States Federal Census · Sullivan-County, Indiana
Our Model Tree links this Harold Clark across the 1920, 1930 and 1940 US Censuses in Sullivan-County, Indiana (XGBoost, ~Confirmed), with identified parents Carl & Art — first a head (b.~1913), then head of a 4-person household.
Age 27
b. ~1913
Male
Head
Born: Indiana
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Sullivan-County, Indiana |
| Surname | Clark |
| Given Name | Harold |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Indiana |
| 1935 Residence (City) | Fairbanks Twp |
| 1935 Residence (County) | Sullivan |
| Additional Details | |
| Occupation | Laborer |
| Industry | Road work |
| Class of Worker | GW |
| Hours Worked | 36 |
| Income (1939) | 227 |
| Highest Grade | H 2 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Occupation | Laborer |
| Township / Ward | Fairbanks Twp |
| Est. Birth Year | ~1913 |
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 Harold | Age | Birth yr |
|---|---|---|---|---|
| Frances Clark | Other | — | 20 | ~1920 |
| Herbert Clark | Son | — | 1 | ~1939 |
| Marguerite Clark | Spouse | — | 25 | ~1915 |
| Harold Clark | Head | — | 27 | ~1913 |
Census Appearances
1920
Sullivan, Indiana
Son, age 7
Sullivan, Indiana · implied b. ~1913 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Harold E |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Indiana |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1930
Sullivan, Indiana
Son, age 17
Sullivan, Indiana · implied b. ~1913 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Harold |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Indiana |
| Can Read/Write | Yes |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1940
Sullivan-County, Indiana
Head, age 27
Sullivan-County, Indiana · implied b. ~1913 — 4 household members
| Surname | Clark |
| Given Name | Harold |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Indiana |
| 1935 Residence (City) | Fairbanks Twp |
| 1935 Residence (County) | Sullivan |
| Occupation | Laborer |
| Industry | Road work |
| Class of Worker | GW |
| Hours Worked | 36 |
| Income (1939) | 227 |
| Highest Grade | H 2 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
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 Harold Clark across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Carl Clark (~0.92 confidence) and father Art Clark (~0.92 confidence) and mother Pearl Clark (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Carl Clark
b. ~1888
Source father
● Household
· direct · ~0.92
Father
Art Clark
b. ~1889
Source father
● Household
· direct · ~0.92
Mother
Pearl Clark
b. ~1893
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Harold Clark
Head · 1940 · age 27 · b. ~1913 · Indiana
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Sullivan-County, Indiana
Open full size
1940 US Federal Census — Sullivan-County, Indiana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01097-00240)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Harold Clark THIS PERSON | 27 | Head | Laborer | Indiana |
| 2 | Marguerite Clark | 25 | Wife | Housewife | Indiana |
| 3 | Herbert Dean Clark | 1 | Son | — | Indiana |
| 4 | Frances Clark | 20 | Brother | New Worker | Indiana |
| 5 | Walter Sluder | 58 | Head | Farmer | Indiana |
| 6 | Bessie Sluder | 54 | Wife | Housewife | Indiana |
| 7 | Fred Case | 64 | Head | Farmer | Indiana |
| 8 | Zella Case | 55 | Wife | — | Indiana |
| 9 | Joe Case | 27 | Son | Farmer | Indiana |
| 10 | John E. Mccookey | 64 | Head | Farmer | Indiana |
| 11 | Effie Mccookey | 61 | Wife | — | Indiana |
| 12 | Asher T. Hall | 85 | Boarder | — | Indiana |
| 13 | Dan E. Hurst | 41 | Head | Farmer | Indiana |
| 14 | Robie E. Hurst | 40 | Wife | — | Indiana |
| 15 | Kathleen Hurst | 19 | Daughter | — | Indiana |
| 16 | Harriett Ann Hurst | 12 | Daughter | — | Indiana |
| 17 | Dow D. Johnson | 53 | Head | Carpenter | Indiana |
| 18 | Lou Johnson | 52 | Wife | — | Indiana |
| 19 | Reva Johnson | 23 | Daughter | — | Indiana |
| 20 | Donald Jr. Johnson | 13 | Son | — | Indiana |
| 21 | James Riley Johnson | 91 | Father | — | West Virginia |
| 22 | James Pittman | 64 | Head | Farmer | Indiana |
| 23 | Ida Pittman | 62 | Wife | — | Indiana |
| 24 | Harold Case | 28 | Head | Farmer | Indiana |
| 25 | Marybelle Case | 21 | Wife | — | Indiana |
| 26 | Wilbur Jewell | 65 | Head | — | Indiana |
| 27 | Dow Starkey | 47 | Head | Farmer | Indiana |
| 28 | Ida M. Starkey | 49 | Wife | — | Indiana |
| 29 | Hester Starkey | 24 | Daughter | — | Indiana |
| 30 | Hugh Finley | 38 | Head | Farmer | Indiana |
| 31 | Verna D. Finley | 39 | Wife | — | Indiana |
| 32 | Oleta T. Finley | 12 | Daughter | — | Indiana |
| 33 | Marjorie Finley | 7 | Daughter | — | Indiana |
| 34 | Kathryn Finley | 4 | Daughter | — | Indiana |
| 35 | Billie Hayes | 17 | Nephew | — | Indiana |
| 36 | Ezra Malone | 27 | Head | Trucker | Indiana |
| 37 | Mona W. Malone | 24 | Wife | — | Indiana |
| 38 | Donald Ray Malone | 4 | Son | — | Indiana |
| 39 | Forrest Harris | 31 | Head | Trucker | Indiana |
| 40 | Ethel Harris | 26 | Wife | — | Indiana |
Related Census Records
Pedigree Summary
Harold
Gen 1 · 3 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)