DC
Donald Clark — 1940 US Census Record
Model Tree available1940 United States Federal Census · Washington-County, Pennsylvania
Our Model Tree links this Donald Clark across the 1920, 1930 and 1940 US Censuses in Washington-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents James & James — first a son (b.~1913), then head of a 3-person household.
Age 27
b. ~1913
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Washington-County, Pennsylvania |
| Surname | Clark |
| Given Name | Donald |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Chartiers |
| 1935 Residence (County) | Washington |
| Additional Details | |
| Occupation | Miner |
| Industry | Coal |
| Class of Worker | PW |
| Hours Worked | 12 |
| Income (1939) | 400 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Miner |
| Township / Ward | Chartiers |
| 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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Donald | Age | Birth yr |
|---|---|---|---|---|
| Alice Clark | Spouse | — | 58 | ~1882 |
| James Clark | Head | — | 63 | ~1877 |
| Donald Clark | Son | — | 27 | ~1913 |
Census Appearances
1920
Washington, Pennsylvania
Son, age 7
Washington, Pennsylvania · implied b. ~1913 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Donald |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Washington, Pennsylvania
Son, age 17
Washington, Pennsylvania · implied b. ~1913 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Donald G. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Washington-County, Pennsylvania
Son, age 27
Washington-County, Pennsylvania · implied b. ~1913 — 3 household members
| Surname | Clark |
| Given Name | Donald |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Chartiers |
| 1935 Residence (County) | Washington |
| Occupation | Miner |
| Industry | Coal |
| Class of Worker | PW |
| Hours Worked | 12 |
| Income (1939) | 400 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
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 Donald Clark across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father James Clark (~0.92 confidence) and father James Clark (~0.92 confidence) and father James Clark (~0.92 confidence) and mother Alice Clark (~0.92 confidence) and mother Alice Clark (~0.92 confidence) and mother Alice Clark (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
James Clark
b. ~1877
Source father
● Household
· direct · ~0.92
Father
James Clark
b. ~1877
Source father
● Household
· direct · ~0.92
Father
James Clark
b. ~1878
Source father
● Household
· direct · ~0.92
Mother
Alice Clark
b. ~1883
Source mother
● Household
· direct · ~0.92
Mother
Alice Clark
b. ~1882
Source mother
● Household
· direct · ~0.92
Mother
Alice Clark
b. ~1884
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Donald Clark
Son · 1940 · age 27 · b. ~1913 · Pennsylvania
★ 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 — Washington-County, Pennsylvania
Open full size
1940 US Federal Census — Washington-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03622-00136)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Maud Micklean | 54 | Wife | H | Pennsylvania |
| 42 | Ralph Micklean | 25 | Son | Miner | Pennsylvania |
| 43 | Guy Micklean | 51 | Brother-in-law | Laborer | Pennsylvania |
| 44 | Charles Horne | 35 | Head | Miner | Pennsylvania |
| 45 | Hazel Horne | 33 | Wife | H | Pennsylvania |
| 46 | Lois Ann Horne | 12 | Daughter | — | Pennsylvania |
| 47 | Charles Jr. Horne | 7 | Son | — | Pennsylvania |
| 48 | Harry Smith | 39 | Head | Laborer | Pennsylvania |
| 49 | Florence Smith | 30 | Wife | H | Pennsylvania |
| 50 | Christine Smith | 2 | Daughter | — | Pennsylvania |
| 51 | John Mccartney | 58 | Head | Miner | Scotland |
| 52 | Ruby Mccartney | 49 | Wife | H | Pennsylvania |
| 53 | Jane Mccartney | 25 | Daughter | Clerk | Pennsylvania |
| 54 | Robert Ballentzee | 24 | Head | Truck Driver | Pennsylvania |
| 55 | Helen Ballentzee | 24 | Wife | H | Pennsylvania |
| 56 | Gertie Ballentzee | 54 | Mother | H | Pennsylvania |
| 57 | Frank Collins | 32 | Head | Laborer | Pennsylvania |
| 58 | Margaret Collins | 28 | Wife | H | Pennsylvania |
| 59 | Kathleen Collins | 5 | Daughter | — | Pennsylvania |
| 60 | Frank Jr. Collins | 2 | Son | — | Pennsylvania |
| 61 | Delmar Phillips | 28 | Head | Laborer | Pennsylvania |
| 62 | Ethel Phillips | 27 | Wife | H | West Virginia |
| 63 | June Phillips | 4 | Daughter | — | Pennsylvania |
| 64 | Jean Phillips | 2 | Daughter | — | Pennsylvania |
| 65 | Paul Phillips | 2 | Son | — | Pennsylvania |
| 66 | James Clark | 63 | Head | Supervisor | Pennsylvania |
| 67 | Alice Clark | 58 | Wife | H | Pennsylvania |
| 68 | Donald Clark THIS PERSON | 27 | Son | Miner | Pennsylvania |
| 69 | Grover Farmer | 56 | Head | Laborer | Ohio |
| 70 | Helena Farmer | 66 | Wife | H | Pennsylvania |
| 71 | Frank Lauzel | 39 | Head | Miner | Pennsylvania |
| 72 | Julia Lauzel | 27 | Wife | H | Pennsylvania |
| 73 | Patricia Ann Lauzel | 5 | Daughter | — | Pennsylvania |
| 74 | Geraldine Ann Lauzel | 3 | Daughter | — | Pennsylvania |
| 75 | Vincent Sikora | 44 | Head | Mechanic Helper | Jugoslavia |
| 76 | Mary Sikora | 35 | Wife | H | West Virginia |
| 77 | Henry Sikora | 12 | Son | — | West Virginia |
| 78 | Clara Sikora | 10 | Daughter | — | West Virginia |
| 79 | Vincent Jr. Sikora | 2 | Son | — | Pennsylvania |
| 80 | Mary Sikora | 74 | Mother | H | Jugoslavia |
Pedigree Summary
Donald
Gen 1 · 6 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)