MC
Martha Clark — 1940 US Census Record
Model Tree available1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Martha Clark across the 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents David & David — first a spouse (b.~1918), then head of a 2-person household.
Age 22
b. ~1918
Female
Spouse
Born: Pennsylvania
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Clark |
| Given Name | Martha |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Highest Grade | No 6 |
| 1935 Residence | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Harrison Twp |
| Est. Birth Year | ~1918 |
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.
2 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Martha | Age | Birth yr |
|---|---|---|---|---|
| Gail Clark | Daughter | — | 1 | ~1939 |
| Martha Clark | Spouse | — | 22 | ~1918 |
Census Appearances
1920
Allegheny, Pennsylvania
Daughter, age 2
Allegheny, Pennsylvania · implied b. ~1918 — 12 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Martha |
| 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
Allegheny, Pennsylvania
Daughter, age 12
Allegheny, Pennsylvania · implied b. ~1918 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Martha |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Spouse, age 22
Allegheny-County, Pennsylvania · implied b. ~1918 — 2 household members
| Surname | Clark |
| Given Name | Martha |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Allegheny |
| Highest Grade | No 6 |
| 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 Martha Clark across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father David Clark (~0.92 confidence) and father David Clark (~0.92 confidence) and mother Clara Clark (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
David Clark
b. ~1874
Source father
● Household
· direct · ~0.92
Father
David Clark
b. ~1879
Source father
● Household
· direct · ~0.92
Mother
Clara Clark
b. ~1882
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Martha Clark
Spouse · 1940 · age 22 · b. ~1918 · 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 — Allegheny-County, Pennsylvania
Open full size
1940 US Federal Census — Allegheny-County, Pennsylvania
Page Contents
21 people indexed on this census page (nara:1940:m-t0627-03405-00034)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Martha Clark THIS PERSON | 22 | Wife | — | Pennsylvania |
| 2 | Gail Alberta Clark | 1 | Daughter | — | Pennsylvania |
| 3 | Arthur L. Clark | 32 | Head | Grinder-Electric | Pennsylvania |
| 4 | Lois Carlyn Clark | 29 | Wife | — | Pennsylvania |
| 5 | Donald Lee Clark | 5 | Son | — | Pennsylvania |
| 6 | Bernice Jeanne Clark | 1 | Daughter | — | Pennsylvania |
| 7 | Kate A. Burtner | 84 | Head | — | Pennsylvania |
| 8 | Helen Burtner | 45 | Daughter | — | Pennsylvania |
| 9 | Dorothea Burtner | 16 | Gr. Daughter | — | Pennsylvania |
| 10 | Dwight Jack | 33 | Head | Chemist Lab. | Pennsylvania |
| 11 | Helen Jack | 31 | Wife | — | Pennsylvania |
| 12 | Helen Charlotte Jack | 11 | Daughter | — | Pennsylvania |
| 13 | Edith Dawn Jack | 8 | Daughter | — | Pennsylvania |
| 14 | Dwight Jr. Jack | 2 | Son | — | Pennsylvania |
| 15 | Lyle Albaugh | 27 | Head | Miner | Pennsylvania |
| 16 | Catherine Albaugh | 25 | Wife | — | Pennsylvania |
| 17 | Catherine Mary Albaugh | 7 | Daughter | — | Pennsylvania |
| 18 | Lyle Robert Albaugh | 3 | Son | — | Pennsylvania |
| 19 | Audrey Jean Albaugh | 3 | Daughter | — | Pennsylvania |
| 20 | Mae Remaley | 17 | Sister-in-law | Domestic | Pennsylvania |
| 21 | Holmes Burtner | 43 | Head | Farmer | Pennsylvania |
Pedigree Summary
Martha
Gen 1 · 3 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)