HC
Harold Clark — 1940 US Census Record
Model Tree available1940 United States Federal Census · Muskingum-County, Ohio
Our Model Tree links this Harold Clark across the 1920, 1930 and 1940 US Censuses in Muskingum-County, Ohio (XGBoost, ~Confirmed), with identified parents William & William — first a son (b.~1898), then head of a 4-person household.
Age 42
b. ~1898
Male
Son
Born: Ohio
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Muskingum-County, Ohio |
| Surname | Clark |
| Given Name | Harold L. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 42 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Cass Twp |
| 1935 Residence (County) | Muskingum |
| Additional Details | |
| Occupation | Janitor |
| Industry | M.E. Church |
| Class of Worker | PW |
| Hours Worked | 12 |
| Income (1939) | 84 |
| Highest Grade | No 0 |
| 1935 Residence | Same House |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Occupation | Janitor |
| Township / Ward | Cass Twp |
| Est. Birth Year | ~1898 |
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 |
|---|---|---|---|---|
| Harold Clark | Son | — | 42 | ~1898 |
| William Clark | Head | — | 80 | ~1860 |
| Virgil Clark | Son | — | 38 | ~1902 |
| Lucy Clark | Spouse | — | 78 | ~1862 |
Census Appearances
1920
Muskingum, Ohio
Son, age 23
Muskingum, Ohio · implied b. ~1897 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Harold S |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1930
Muskingum, Ohio
Son, age 34
Muskingum, Ohio · implied b. ~1896 — 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 | 34 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Occupation | Laborer |
| Industry | Odd jobs |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
Muskingum-County, Ohio
Son, age 42
Muskingum-County, Ohio · implied b. ~1898 — 4 household members
| Surname | Clark |
| Given Name | Harold L. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 42 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Cass Twp |
| 1935 Residence (County) | Muskingum |
| Occupation | Janitor |
| Industry | M.E. Church |
| Class of Worker | PW |
| Hours Worked | 12 |
| Income (1939) | 84 |
| Highest Grade | No 0 |
| 1935 Residence | Same House |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
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 William Clark (~0.92 confidence) and father William Clark (~0.92 confidence) and father William Clark (~0.92 confidence) and mother Lucy Clark (~0.92 confidence) and mother Nancy Clark (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Clark
b. ~1860
Source father
● Household
· direct · ~0.92
Father
William Clark
b. ~1860
Source father
● Household
· direct · ~0.92
Father
William Clark
b. ~1861
Source father
● Household
· direct · ~0.92
Mother
Lucy Clark
b. ~1862
Source mother
● Household
· direct · ~0.92
Mother
Nancy Clark
b. ~1862
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Harold Clark
Son · 1940 · age 42 · b. ~1898 · Ohio
★ You are viewing this record
Sibling
Virgil Clark
Sibling · 1940 · age 38
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 — Muskingum-County, Ohio
Open full size
1940 US Federal Census — Muskingum-County, Ohio
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03122-00072)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Leonard M. Park | 19 | Son | — | Ohio |
| 42 | Wayne E. Park | 6 | Son | — | Ohio |
| 43 | Vernon G. Green | 34 | Head | Watchman Crossing | Ohio |
| 44 | B. Alice Green | 32 | Wife | — | Ohio |
| 45 | V. Victor Green | 10 | Son | — | Ohio |
| 46 | William L. Green | 7 | Son | — | Ohio |
| 47 | Raymond E. Corder | 21 | Head | Stripper | Ohio |
| 48 | Betty F. Corder | 21 | Wife | — | Ohio |
| 49 | Susan Carol Corder | 0 | Daughter | — | Ohio |
| 50 | Clayton E. Somerville | 65 | Head | Farmer | West Virginia |
| 51 | Jennie G. Somerville | 57 | Wife | — | Ohio |
| 52 | William C. Somerville | 19 | Grandson | Farmer | Ohio |
| 53 | B. Maxine Somerville | 19 | Daughter-in-law | — | Ohio |
| 54 | Jannie M. Somerville | 1 | Great-Granddaughter | — | Ohio |
| 55 | Willard W. Cox | 39 | Head | Heat Helper | Ohio |
| 56 | Mary A. Cox | 40 | Wife | — | Ohio |
| 57 | Raymond H. Cox | 13 | Son | — | Ohio |
| 58 | Mary E. Cox | 6 | Daughter | — | Ohio |
| 59 | Mable M. Schneider | 70 | Head | — | Ohio |
| 60 | H. Eugene Struller | 34 | Son-in-law | Sales Man | Ohio |
| 61 | H. Irene Struller | 33 | Daughter | — | Ohio |
| 62 | David H. Gist | 61 | Head | — | Ohio |
| 63 | C. Opal Gist | 61 | Wife | — | Ohio |
| 64 | Donald D. Smith | 34 | Step-Son | Labor | Ohio |
| 65 | Charles C. Munro | 72 | Head | — | Ohio |
| 66 | Mary I. Munro | 78 | Wife | — | Ohio |
| 67 | William A. Clark | 80 | Head | — | Ohio |
| 68 | Lucy I. Clark | 78 | Wife | — | Ohio |
| 69 | Harold L. Clark THIS PERSON | 42 | Son | Janitor | Ohio |
| 70 | Virgil H. Clark | 38 | Son | — | Ohio |
| 71 | Bernard D. Lacy | 43 | Head | Telegrapher | Ohio |
| 72 | Lucile E. Lacy | 40 | Wife | — | Ohio |
| 73 | Dale B. Lacy | 20 | Son | Rodman | Ohio |
| 74 | Marilyn E. Lacy | 17 | Daughter | — | Ohio |
| 75 | Mildred L. Lacy | 17 | Daughter | — | Ohio |
| 76 | Minnie Sawyer | 66 | Mother-in-law | — | Ohio |
| 77 | Blake Mcfarland | 47 | Head | Crossing Watchman | Ohio |
| 78 | Florence Mcfarland | 33 | Wife | — | Ohio |
| 79 | Gloria J. Mcfarland | 12 | Daughter | — | Ohio |
| 80 | Shierlie A. Mcfarland | 10 | Daughter | — | Ohio |
Pedigree Summary
Harold + 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)