HC
Harold Clark — 1940 US Census Record
Model Tree available1940 United States Federal Census · Montgomery-County, Kansas
Our Model Tree links this Harold Clark across the 1920, 1930 and 1940 US Censuses in Montgomery-County, Kansas (XGBoost, ~Confirmed), with identified parents Roll & Myrtle — first a son (b.~1919), then head of a 5-person household.
Age 21
b. ~1919
Male
Son
Born: Kansas
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Montgomery-County, Kansas |
| Surname | Clark |
| Given Name | Harold |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Kansas |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Montgomery |
| Additional Details | |
| Occupation | Mechanic |
| Industry | Auto |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 100 |
| Highest Grade | H 4 |
| 1935 Residence | Kansas |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
| Occupation | Mechanic |
| Township / Ward | Fawn Creek |
| Est. Birth Year | ~1919 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Harold | Age | Birth yr |
|---|---|---|---|---|
| Lurlea Clark | Other | — | 21 | ~1919 |
| Harold Clark | Son | — | 21 | ~1919 |
| Dale Clark | Son | — | 17 | ~1923 |
| Myrtle Clark | Spouse | — | 48 | ~1892 |
| Carl Clark | Son | — | 24 | ~1916 |
Census Appearances
1920
Montgomery, Kansas
Son, age 1
Montgomery, Kansas · implied b. ~1919 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Harold |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Kansas |
| Father's Birthplace | Kansas |
| Mother's Birthplace | Oklahoma |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
1930
Montgomery, Kansas
Son, age 11
Montgomery, Kansas · implied b. ~1919 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Harold |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Kansas |
| Father's Birthplace | Kansas |
| Mother's Birthplace | Oklahoma |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
1940
Montgomery-County, Kansas
Son, age 21
Montgomery-County, Kansas · implied b. ~1919 — 5 household members
| Surname | Clark |
| Given Name | Harold |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Kansas |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Montgomery |
| Occupation | Mechanic |
| Industry | Auto |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 100 |
| Highest Grade | H 4 |
| 1935 Residence | Kansas |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
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 Roll Clark (~0.92 confidence) and mother Myrtle Clark (~0.92 confidence) and mother Myrtle Clark (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Roll Clark
b. ~1891
Source father
● Household
· direct · ~0.92
Mother
Myrtle Clark
b. ~1892
Source mother
● Household
· direct · ~0.92
Mother
Myrtle Clark
b. ~1892
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Harold Clark
Son · 1940 · age 21 · b. ~1919 · Kansas
★ You are viewing this record
Sibling
Dale Clark
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Carl Clark
Sibling · 1940 · age 24
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 — Montgomery-County, Kansas
Open full size
1940 US Federal Census — Montgomery-County, Kansas
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-01247-00815)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Myrtle Clark | 48 | Wife | — | Kansas |
| 42 | Harold Clark THIS PERSON | 21 | Son | Mechanic | Kansas |
| 43 | Dale Clark | 17 | Son | — | Kansas |
| 44 | Carl Lovell Clark | 24 | Son | Molder | Kansas |
| 45 | Lurlea Clark | 21 | Dau-Law | — | Kansas |
| 47 | Rosco Nance | 59 | Head | Farmer | Illinois |
| 48 | Alta Nance | 50 | Wife | — | Kansas |
| 49 | Paul Nance | 21 | Son | Laborer | Kansas |
| 50 | Maxine Nance | 18 | Daughter | New Worker | Kansas |
| 51 | Alice Nance | 16 | Daughter | New Worker | Kansas |
| 52 | Shirley Nance | 12 | Daughter | — | Kansas |
| 53 | Ernest Schafer | 26 | Head | Farmer | Kansas |
| 54 | Eva Schafer | 30 | Wife | — | Kansas |
| 55 | Irene Schafer | 8 | Daughter | — | Kansas |
| 56 | Harold Schafer | 3 | Son | — | Kansas |
| 57 | Otto Eben | 53 | Head | Farmer | Germany |
| 58 | Orin Denny | 36 | Head | Farmer | Kansas |
| 59 | Georgia Denny | 33 | Wife | — | Oklahoma |
| 60 | Edward Denny | 15 | Son | Laborer | Oklahoma |
| 61 | Emma Denny | 10 | Daughter | — | Kansas |
| 62 | Dorothy Denny | 2 | Daughter | — | Kansas |
| 63 | Carl Clark | 75 | Head | — | Kansas |
| 64 | Ivan Clark | 62 | Brother | — | Kansas |
| 65 | W M Clark | 65 | Brother | — | Kansas |
| 66 | S H Attebery | 49 | Head | Farmer | Kansas |
| 67 | Agatha Attebery | 43 | Wife | — | Kansas |
| 68 | Lee Attebery | 18 | Son | — | Kansas |
| 69 | Agatha Attebery | 16 | Daughter | — | Kansas |
| 70 | June Attebery | 14 | Daughter | — | Kansas |
| 71 | Velma Attebery | 11 | Daughter | — | Kansas |
| 72 | Marvine Attebery | 9 | Daughter | — | Kansas |
| 73 | Pauline Attebery | 5 | Daughter | — | Kansas |
| 74 | Ray Attebery | 3 | Son | — | Kansas |
| 75 | Harley Harrison | 55 | Head | Farmer | Kansas |
| 76 | Effie Harrison | 51 | Wife | — | Oklahoma |
| 77 | Albert Harrison | 14 | Son | — | Kansas |
| 78 | Roberta Harrison | 14 | Daughter | — | Kansas |
| 79 | Harold Harkrader | 44 | Head | Farmer | Kansas |
| 80 | Pearl Harkrader | 40 | Wife | — | Kansas |
Pedigree Summary
Harold + 2 siblings
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)