GC
Grace Clark — 1940 US Census Record
Model Tree available1940 United States Federal Census · Washington-County, Pennsylvania
Our Model Tree links this Grace Clark across the 1920, 1930 and 1940 US Censuses in Washington-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents George & Anna — first a spouse (b.~1917), then head of a 6-person household.
Age 23
b. ~1917
Female
Spouse
Born: Pennsylvania
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Washington-County, Pennsylvania |
| Surname | Clark |
| Given Name | Grace |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Charleroi |
| 1935 Residence (County) | Washington |
| Additional Details | |
| Industry | H |
| Highest Grade | Hs 1 |
| 1935 Residence | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Fallowfield Township |
| Est. Birth Year | ~1917 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Grace | Age | Birth yr |
|---|---|---|---|---|
| Frank Clark | Head | — | 27 | ~1913 |
| Kirby Clark | Son | — | ~1940 | |
| Billy Clark | Other | — | 7 | ~1933 |
| Jay Clark | Son | — | 2 | ~1938 |
| Grace Clark | Spouse | — | 23 | ~1917 |
| Gary Clark | Son | — | 1 | ~1939 |
Census Appearances
1920
Washington, Pennsylvania
Daughter, age 2
Washington, Pennsylvania · implied b. ~1918 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Grace S |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 2 |
| 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
Daughter, age 12
Washington, Pennsylvania · implied b. ~1918 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Grace |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| 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
Spouse, age 23
Washington-County, Pennsylvania · implied b. ~1917 — 6 household members
| Surname | Clark |
| Given Name | Grace |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Charleroi |
| 1935 Residence (County) | Washington |
| Industry | H |
| Highest Grade | Hs 1 |
| 1935 Residence | Pennsylvania |
| 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 Grace Clark across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father George Clark (~0.92 confidence) and mother Anna Clark (~0.92 confidence) and mother Anna Clark (~0.92 confidence) and mother Grace Clark (~0.60 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.84
Father
George Clark
b. ~1883
Source father
● Household
· direct · ~0.92
Mother
Anna Clark
b. ~1889
Source mother
● Household
· direct · ~0.92
Mother
Anna Clark
b. ~1890
Source mother
● Household
· direct · ~0.92
Mother
Grace Clark
b. ~1910
Source mother
● Household
· direct · ~0.6
This person
Anchor record
Grace Clark
Spouse · 1940 · age 23 · b. ~1917 · 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-t0627-03623-00536)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Carol Lea Cooper | 12 | — | — | Pennsylvania |
| 2 | Mario Sismondo | 33 | Head | Electric Welder | Pennsylvania |
| 3 | Florence Sismondo | 28 | Wife | — | Pennsylvania |
| 4 | Millie Joseph Sismondo | 2 | Son | — | Pennsylvania |
| 5 | James D. Hamilton | 58 | Head | Pipe Fitter | Illinois |
| 6 | Eva Hamilton | 54 | Wife | — | Ohio |
| 7 | Dorothy Mae Hamilton | 17 | Daughter | — | Pennsylvania |
| 8 | Grace Hamilton | 9 | Daughter | — | Pennsylvania |
| 9 | Harold J. Henry | 43 | Head | Shipper | Michigan |
| 10 | Emma Henry | 28 | Wife | — | Pennsylvania |
| 11 | Myrta May Henry | 5 | Daughter | — | Pennsylvania |
| 12 | Shirley Ada Henry | 4 | Daughter | — | Pennsylvania |
| 13 | Frank Clark | 27 | Head | Burner | Pennsylvania |
| 14 | Grace Clark THIS PERSON | 23 | Wife | — | Pennsylvania |
| 15 | Jay Clark | 2 | Son | — | Pennsylvania |
| 16 | Gary Clark | 1 | Son | — | Pennsylvania |
| 17 | Kirby Clark | 0 | Son | — | Pennsylvania |
| 18 | Billy Clark | 7 | Adopted Son | — | Pennsylvania |
| 19 | Jacob Clark | 49 | Head | Foreman | Pennsylvania |
| 20 | Cora Clark | 48 | Wife | — | Pennsylvania |
| 21 | Ira Howard | 36 | Head | Trimmer | Pennsylvania |
| 22 | Bessie Howard | 31 | Wife | — | Pennsylvania |
| 23 | Ira Jr. Howard | 13 | Son | — | Pennsylvania |
| 24 | Cora Ellen Howard | 8 | Daughter | — | Pennsylvania |
| 25 | Claudia Jane Howard | 5 | Daughter | — | Pennsylvania |
| 26 | Nancy Jane Howard | 2 | Daughter | — | Pennsylvania |
| 27 | Matti Kokkila | 46 | Head | Heater | Finland |
| 28 | Ida Kokkila | 53 | Wife | — | Finland |
| 29 | Matthew Kokkila | 22 | Son | Laborer | Pennsylvania |
| 30 | Bernard Kokkila | 21 | Son | Laborer | Pennsylvania |
| 31 | Velma Kokkila | 17 | Daughter | — | Pennsylvania |
| 32 | Esther Kokkila | 19 | Daughter | House Keeper | Pennsylvania |
| 33 | Dwight D. Timmons | 33 | Head | Pilot | Ohio |
| 34 | Julia Timmons | 36 | Wife | — | Pennsylvania |
| 35 | Dwight R. Timmons | 9 | Son | — | Pennsylvania |
| 36 | Anna Clara Timmons | 64 | Mother | — | Ohio |
| 37 | Michael A. Gerber | 39 | Head | Chipper | Pennsylvania |
| 38 | Margaret Gerber | 33 | Wife | — | Pennsylvania |
| 39 | Jack Nelson Gerber | 5 | Son | — | Pennsylvania |
| 40 | Margaret Gerber | 3 | Daughter | — | Pennsylvania |
Pedigree Summary
Grace
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)