HC
Harold Clark — 1940 US Census Record
Model Tree available1940 United States Federal Census · Allen-County, Ohio
Our Model Tree links this Harold Clark across the 1910, 1920, 1930 and 1940 US Censuses in Allen-County, Ohio (XGBoost, ~Confirmed), with identified parents John & Elmira — first a head (b.~1902), then head of a 5-person household.
Age 38
b. ~1902
Male
Head
Born: Ohio
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Allen-County, Ohio |
| Surname | Clark |
| Given Name | Harold O. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Ohio |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Allen |
| Additional Details | |
| Occupation | Teacher |
| Industry | Lima Public Schools |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1500 |
| Highest Grade | C 4 |
| 1935 Residence | Ohio |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Occupation | Teacher |
| Township / Ward | Lima |
| Est. Birth Year | ~1902 |
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 |
|---|---|---|---|---|
| Marylin Clark | Daughter | — | 10 | ~1930 |
| Miriam Clark | Daughter | — | 13 | ~1927 |
| Carol Clark | Daughter | — | 6 | ~1934 |
| Harold Clark | Head | — | 38 | ~1902 |
| Eneta Clark | Spouse | — | 34 | ~1906 |
Census Appearances
1910
Allen, Ohio
Son, age 8
Allen, Ohio · implied b. ~1902 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Herald O |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1920
Allen, Ohio
Son, age 17
Allen, Ohio · implied b. ~1903 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Harold O |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| 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
Allen, Ohio
Head, age 27
Allen, Ohio · implied b. ~1903 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Harold |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Ohio |
| Age at First Marriage | 22 |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 15 |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
Allen-County, Ohio
Head, age 38
Allen-County, Ohio · implied b. ~1902 — 5 household members
| Surname | Clark |
| Given Name | Harold O. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Ohio |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Allen |
| Occupation | Teacher |
| Industry | Lima Public Schools |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1500 |
| Highest Grade | C 4 |
| 1935 Residence | Ohio |
| 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 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Clark (~0.92 confidence) and mother Elmira Clark (~0.92 confidence) and father Frank Clark (~0.92 confidence) and mother Clara Clark (~0.60 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.84
Father
John Clark
b. ~1870
Source father
● Household
· direct · ~0.92
Mother
Elmira Clark
b. ~1877
Source mother
● Household
· direct · ~0.92
Father
Frank Clark
b. ~1879
Source father
● Household
· direct · ~0.92
Mother
Clara Clark
b. ~1894
Source mother
● Household
· direct · ~0.6
This person
Anchor record
Harold Clark
Head · 1940 · age 38 · b. ~1902 · Ohio
★ 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 — Allen-County, Ohio
Open full size
1940 US Federal Census — Allen-County, Ohio
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-03020-00777)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Herman R. Williams | 33 | Head | Prop. | Ohio |
| 2 | Ethel R. Williams | 33 | Wife | Housewife | Ohio |
| 3 | Thomas Williams | 8 | Son | — | Ohio |
| 4 | Robert Williams | 5 | Son | — | Ohio |
| 5 | Melvin Williams | 3 | Son | — | Ohio |
| 6 | Jeanine Williams | 0 | Daughter | — | Ohio |
| 7 | Irene Schraer | 20 | Lodger | 40 | Ohio |
| 8 | Wilson Fryzinger | 32 | Head | Foreman | Ohio |
| 9 | Hazel R. Fryzinger | 27 | Wife | Housewife | Ohio |
| 10 | Hazel Copeland | 36 | Lodger | Saleslady | Ohio |
| 11 | Harold O. Clark THIS PERSON | 38 | Head | Teacher | Ohio |
| 12 | Eneta Q. Clark | 34 | Wife | Housewife | Ohio |
| 13 | Miriam Clark | 13 | Daughter | — | Ohio |
| 14 | Marylin Clark | 10 | Daughter | — | Ohio |
| 15 | Carol Clark | 6 | Daughter | — | Ohio |
| 16 | John D. Bourk | 42 | Head | Yard Clerk | Ohio |
| 17 | Dorothy Bourk | 42 | Wife | Housewife | Ohio |
| 18 | John Bourk | 12 | Son | — | Ohio |
| 19 | Joseph Bourk | 10 | Son | — | Ohio |
| 20 | James Bourk | 7 | Son | — | Ohio |
| 21 | William Bourk | 5 | Son | — | Ohio |
| 22 | Dorothy Bourk | 3 | Daughter | — | Ohio |
| 23 | Harold Steger | 26 | Head | Machinist | Ohio |
| 24 | Helen Q. Steger | 23 | Wife | Housewife | Ohio |
| 25 | Darlene Steger | 2 | Daughter | — | Ohio |
| 26 | Ralph M. Brown | 48 | Head | Machine Foreman | Ohio |
| 27 | Harriett E. Brown | 37 | Wife | Housewife | Ohio |
| 28 | John S. Fletcher | 14 | Step-son | — | Ohio |
| 29 | Charlotte D. Pursley | 46 | Head | Saleslady | Ohio |
| 30 | R. Craig Pursley | 21 | Son | — | Ohio |
| 31 | Della Fryzinger | 83 | Mother | — | Ohio |
| 33 | Russel Baker | 54 | Head | Bookkeeper | Ohio |
| 34 | Marie V. Baker | 44 | Wife | Housewife | Ohio |
| 35 | Kathrine Baker | 27 | Daughter | Stenographer | Michigan |
| 36 | Mary Margaret Baker | 21 | Daughter | Telephone Operator | Ohio |
| 37 | Thomas Baker | 25 | Son | Clerical Worker | Michigan |
| 38 | Margaret Ann Baker | 5 | Daughter | — | Ohio |
| 39 | Miriam M. Baker | 3 | Grandchild | — | Ohio |
| 40 | George Traub | 46 | Head | Manager | New York |
Pedigree Summary
Harold
Gen 1 · 4 parents
~0.84
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)