HC
Harry Clark — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Washington-County, Maryland
Our Model Tree links this Harry Clark across the 1920, 1930 and 1940 US Censuses in Washington-County, Maryland (XGBoost, ~Confirmed) — first a head (b.~1883), then head of a 4-person household.
Age 57
b. ~1883
Male
Head
Born: Maryland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Washington-County, Maryland |
| Surname | Clark |
| Given Name | Harry E |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 57 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Hagerstown |
| 1935 Residence (County) | Washington |
| Additional Details | |
| Occupation | Night Watchman |
| Industry | Hosiery Mill |
| Class of Worker | PW |
| Hours Worked | 52 |
| Income (1939) | 602 |
| Highest Grade | H 3 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Night Watchman |
| Township / Ward | Hagerstown |
| Est. Birth Year | ~1883 |
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 Harry | Age | Birth yr |
|---|---|---|---|---|
| Harry Clark | Head | — | 57 | ~1883 |
| Mary Clark | Other | — | 85 | ~1855 |
| Raymond Clark | Son | — | 37 | ~1903 |
| Mary Clark | Spouse | — | 58 | ~1882 |
Census Appearances
1920
Washington, Maryland
Head, age 37
Washington, Maryland · implied b. ~1883 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Harry E |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Machinist |
| Industry | Automobile |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Washington, Maryland
Head, age 47
Washington, Maryland · implied b. ~1883 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Harry E. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Maryland |
| Age at First Marriage | 19 |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Mechanic |
| Industry | Automobile |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 4000 |
| Veteran | No |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Washington-County, Maryland
Head, age 57
Washington-County, Maryland · implied b. ~1883 — 4 household members
| Surname | Clark |
| Given Name | Harry E |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 57 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Hagerstown |
| 1935 Residence (County) | Washington |
| Occupation | Night Watchman |
| Industry | Hosiery Mill |
| Class of Worker | PW |
| Hours Worked | 52 |
| Income (1939) | 602 |
| Highest Grade | H 3 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
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 Harry Clark across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Harry Clark
Head · 1940 · age 57 · b. ~1883 · Maryland
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Washington-County, Maryland
Open full size
1940 US Federal Census — Washington-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01561-00455)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mildred H Kipink | 32 | Daughter | Teacher | Maryland |
| 2 | Catherine Kipink | 55 | Wife | — | Maryland |
| 3 | Thomas A Miller | 52 | Head | Clerk | Maryland |
| 4 | Anna A Miller | 45 | Wife | — | Maryland |
| 5 | Marvin O Miller | 19 | Son | Knitter | Maryland |
| 6 | Doris L Miller | 15 | Daughter | — | Maryland |
| 7 | — | None | — | — | — |
| 8 | Estella M Eisidore | 41 | Head | Stenographer | Maryland |
| 9 | Alton H Eisidore | 24 | Son | Draftsman | District of Columbia |
| 10 | Robert B Eisidore | 17 | Son | New Worker | Maryland |
| 11 | Frank A Coss | 49 | Head | Clerk | Maryland |
| 12 | Margaret E Coss | 47 | Wife | — | Maryland |
| 13 | Richard E Coss | 22 | Son | Draftsman | Maryland |
| 14 | Alice R Coss | 15 | Daughter | — | Maryland |
| 15 | Roy E Rohrer | 68 | Head | Sole Cutter | Maryland |
| 16 | Cora B Rohrer | 66 | Wife | — | Maryland |
| 17 | Daniel S Young | 42 | Head | Chauffeur | Maryland |
| 18 | Catherine E Young | 37 | Wife | — | Pennsylvania |
| 19 | Harry E Clark THIS PERSON | 57 | Head | Night Watchman | Maryland |
| 20 | Mary B Clark | 58 | Wife | — | Maryland |
| 21 | Raymond E Clark | 37 | Son | Truck Driver | Maryland |
| 22 | Mary J Clark | 85 | Mother | — | Maryland |
| 23 | Lawrence Stauffer | 23 | Head | Pressman | Maryland |
| 24 | Pauline Stauffer | 25 | Wife | Hand Finisher | Maryland |
| 25 | Charles Stauffer | 5 | Son | — | Maryland |
| 26 | Bettie Lee Stauffer | 4 | Daughter | — | Maryland |
| 27 | — | None | — | — | — |
| 28 | — | None | — | — | — |
| 29 | Fred C White | 40 | Head | Salesman | Maryland |
| 30 | Mary F White | 45 | Wife | — | Maryland |
| 31 | Timmie E White | 15 | Son | — | Maryland |
| 32 | William Goodrich | 21 | Son | Laborer | Pennsylvania |
| 33 | June A Goodrich | 19 | Daughter | — | Maryland |
| 34 | Patricia Goodrich | 0 | Grandson | — | Maryland |
| 35 | Jesse T Young | 54 | Head | — | Maryland |
| 36 | Lillian V Young | 28 | Daughter | — | Maryland |
| 37 | L. Franklin Young | 26 | Son | Machinist | Maryland |
| 38 | Austin T Young | 24 | Son | Machinist | Maryland |
| 39 | Sue B Hoover | 49 | Head | Seamstress | Maryland |
| 40 | Fred Hoover | 22 | Son | Office Work | Maryland |
Related Census Records
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)