DC
Dorothy Cooper — 1940 US Census Record
Model Tree available1940 United States Federal Census · Delaware-County, Pennsylvania
Our Model Tree links this Dorothy Cooper across the 1920, 1930 and 1940 US Censuses in Delaware-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents George & James — first a daughter (b.~1915), then head of a 6-person household.
Age 25
b. ~1915
Female
Daughter
Born: Pennsylvania
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Delaware-County, Pennsylvania |
| Surname | Cooper |
| Given Name | Dorothy |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Chester |
| Additional Details | |
| Occupation | Laborer |
| Industry | Carpenter |
| Class of Worker | PW |
| Hours Worked | 13 |
| Income (1939) | 988 |
| Highest Grade | No 5 |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Laborer |
| Township / Ward | Chester |
| Est. Birth Year | ~1915 |
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 Dorothy | Age | Birth yr |
|---|---|---|---|---|
| Henrietta Cooper | Spouse | — | 45 | ~1895 |
| Henrietta Sanderson | Other | — | 54 | ~1886 |
| William Cooper | Son | — | 22 | ~1918 |
| Anna Cooper | Other | — | 8 | ~1932 |
| James Cooper | Head | — | 50 | ~1890 |
| Dorothy Cooper | Daughter | — | 25 | ~1915 |
Census Appearances
1920
Delaware, Pennsylvania
Daughter, age 5
Delaware, Pennsylvania · implied b. ~1915 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cooper |
| Given Name | Dorothy M |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | none |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Delaware, Pennsylvania
Daughter, age 15
Delaware, Pennsylvania · implied b. ~1915 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cooper |
| Given Name | Dorothy |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Pennsylvania |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Delaware-County, Pennsylvania
Daughter, age 25
Delaware-County, Pennsylvania · implied b. ~1915 — 6 household members
| Surname | Cooper |
| Given Name | Dorothy |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Chester |
| Occupation | Laborer |
| Industry | Carpenter |
| Class of Worker | PW |
| Hours Worked | 13 |
| Income (1939) | 988 |
| Highest Grade | No 5 |
| 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 Dorothy Cooper across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father George Cooper (~0.92 confidence) and father James Cooper (~0.92 confidence) and mother Henrietta Cooper (~0.92 confidence) and mother Henrietta Cooper (~0.92 confidence) and mother Ida Cooper (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
George Cooper
b. ~1887
Source father
● Household
· direct · ~0.92
Father
James Cooper
b. ~1892
Source father
● Household
· direct · ~0.92
Mother
Henrietta Cooper
b. ~1895
Source mother
● Household
· direct · ~0.92
Mother
Henrietta Cooper
b. ~1895
Source mother
● Household
· direct · ~0.92
Mother
Ida Cooper
b. ~1891
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Dorothy Cooper
Daughter · 1940 · age 25 · b. ~1915 · Pennsylvania
★ You are viewing this record
Sibling
William Cooper
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Delaware-County, Pennsylvania
Open full size
1940 US Federal Census — Delaware-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03488-00436)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Pauline Oaker | 42 | Wife | — | Russia |
| 2 | Victor Oaker | 18 | Son | — | Pennsylvania |
| 3 | Milton Oaker | 10 | Son | — | Pennsylvania |
| 4 | Ida Saunders | 40 | Head | House Keeper | Pennsylvania |
| 5 | Charles Kicks | 41 | Lodger | Laborer | Virginia |
| 6 | Carl Richards | 32 | Head | Laborer | Maryland |
| 7 | Daisy Richards | 31 | Wife | — | Maryland |
| 8 | James Thorne | 45 | Lodger | Laborer | Maryland |
| 9 | Ella Haywood | 32 | Head | — | South Carolina |
| 10 | Thelma Haywood | 6 | Daughter | — | Pennsylvania |
| 11 | John Wright | 33 | Brother | Laborer | South Carolina |
| 12 | Eleanore Wright | 26 | Sister | — | Ohio |
| 13 | William Brown | 34 | Head | Laborer | Maryland |
| 14 | Dorothy Brown | 35 | Wife | Waitress | Pennsylvania |
| 15 | Charles Burke | 17 | Step-son | — | Pennsylvania |
| 16 | George Burke | 19 | Step-son | Guard | Pennsylvania |
| 17 | John Price | 35 | Head | Laborer | Pennsylvania |
| 18 | Anna Price | 37 | Wife | — | Maryland |
| 19 | Ella Price | 7 | Daughter | — | Pennsylvania |
| 20 | George Minor | 28 | Head | Laborer | Maryland |
| 21 | Carrie Minor | 40 | Wife | — | Maryland |
| 22 | Earl Minor | 4 | Son | — | Pennsylvania |
| 23 | Edward Brown | 21 | Step-son | Laborer | Maryland |
| 24 | William Blair | 55 | Head | Laborer | Maryland |
| 25 | Georgeanna Blair | 52 | Wife | — | Maryland |
| 26 | Howard Blair | 21 | Son | New Worker | Pennsylvania |
| 27 | Myrtle Blair | 16 | Daughter | — | Pennsylvania |
| 28 | Ella Blair | 12 | Daughter | — | Pennsylvania |
| 29 | Frances Johnson | 53 | Head | — | Maryland |
| 30 | Eugene Johnson | 23 | Son | Candy Man | Pennsylvania |
| 31 | Percy Johnson | 20 | Son | Laborer | Pennsylvania |
| 32 | James Cooper | 50 | Head | Maid | Maryland |
| 33 | Henrietta Cooper | 45 | Wife | Maid | Pennsylvania |
| 34 | Dorothy Cooper THIS PERSON | 25 | Daughter | Laborer | Pennsylvania |
| 35 | William Cooper | 22 | Son | — | Pennsylvania |
| 36 | Anna Cooper | 8 | Granddaughter | — | Pennsylvania |
| 37 | Henrietta Sanderson | 54 | Aunt | — | Maryland |
| 38 | Alexander Moore | 38 | Head | Laborer | North Carolina |
| 39 | Alma Moore | 27 | Wife | — | South Carolina |
| 40 | Emily Richardson | 16 | Sister-in-law | New Worker | South Carolina |
Related Census Records
Pedigree Summary
Dorothy + 1 sibling
Gen 1 · 5 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)