DC
Dorothy Cooper — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Chester-County, Pennsylvania
Our Model Tree links this Dorothy Cooper across the 1930 and 1940 US Censuses in Chester-County, Pennsylvania (XGBoost, ~Confirmed) — first a daughter (b.~1925), then head of a 9-person household.
Age 15
b. ~1925
Female
Daughter
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Chester-County, Pennsylvania |
| Surname | Cooper |
| Given Name | Dorothy |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | West Chester |
| 1935 Residence (County) | Chester |
| Additional Details | |
| Highest Grade | G 8 |
| 1935 Residence | Same house |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | West Chester |
| Est. Birth Year | ~1925 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Dorothy | Age | Birth yr |
|---|---|---|---|---|
| Alice Cooper | Daughter | — | 8 | ~1932 |
| Alice Cooper | Spouse | — | 33 | ~1907 |
| Eleanor Cooper | Daughter | — | 7 | ~1933 |
| James Dawson | Other | — | 26 | ~1914 |
| Dorothy Cooper | Daughter | — | 15 | ~1925 |
| Joseph Cooper | Head | — | 33 | ~1907 |
| Mary Cooper | Daughter | — | 12 | ~1928 |
| Joseph Cooper | Son | — | 1 | ~1939 |
| John Cooper | Son | — | 5 | ~1935 |
Census Appearances
1930
Chester, Pennsylvania
Other, age 5
Chester, Pennsylvania · implied b. ~1925 — 13 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cooper |
| Given Name | Dorothy |
| Relationship to Head | Grandchild |
| Sex | F |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Veteran | No |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Chester-County, Pennsylvania
Daughter, age 15
Chester-County, Pennsylvania · implied b. ~1925 — 9 household members
| Surname | Cooper |
| Given Name | Dorothy |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | West Chester |
| 1935 Residence (County) | Chester |
| Highest Grade | G 8 |
| 1935 Residence | Same house |
| 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 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Dorothy Cooper
Daughter · 1940 · age 15 · b. ~1925 · Pennsylvania
★ You are viewing this record
Sibling
Joseph Cooper
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alice Cooper
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eleanor Cooper
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Cooper
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Cooper
Sibling · 1940 · age 12
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 — Chester-County, Pennsylvania
Open full size
1940 US Federal Census — Chester-County, Pennsylvania
Page Contents
37 people indexed on this census page (nara:1940:m-t0627-03467-00342)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 44 | Geo. W. Blount | 61 | Head | Clerk | N. Carolina |
| 45 | Emily H. Blount | 53 | Wife | — | Georgia |
| 46 | Smith A. Blount | 12 | Son | — | Pennsylvania |
| 47 | Emily J. Blount | 21 | Daughter | Maid | Virginia |
| 48 | John Brandon | 60 | Head | Night Watchman | N. Carolina |
| 49 | M. Irene Brandon | 57 | Wife | — | Pennsylvania |
| 50 | Garnett R. Scott | 15 | Boarder | — | Pennsylvania |
| 51 | Stella D. Scott | 10 | Boarder | — | Pennsylvania |
| 52 | Jacob C. Barger | 53 | Brother-in-law | Laborer | Pennsylvania |
| 53 | Anna Mccleary | 52 | Head | — | Pennsylvania |
| 54 | Emily Mccleary | 21 | Daughter | Stenographer | Pennsylvania |
| 55 | Mary Mccleary | 16 | Daughter | — | Pennsylvania |
| 56 | Norman Mccleary | 14 | Son | — | Pennsylvania |
| 57 | Walter E. Smith | 63 | Head | — | Pennsylvania |
| 58 | Alphonsine Smith | 41 | Daughter | Beautician | New Jersey |
| 59 | George Burton | 37 | Head | Laborer | Pennsylvania |
| 60 | Gladys Burton | 27 | Wife | Servant | New Jersey |
| 61 | Cornelia Hopkins | 65 | Boarder | — | Pennsylvania |
| 62 | John Hopkins | 4 | Boarder | — | Pennsylvania |
| 63 | Philip Hopkins | 3 | Boarder | — | Pennsylvania |
| 64 | Joseph Cooper | 33 | Head | Laborer | Pennsylvania |
| 65 | Alice Cooper | 33 | Wife | — | Pennsylvania |
| 66 | Dorothy Cooper THIS PERSON | 15 | Daughter | — | Pennsylvania |
| 67 | Mary Cooper | 12 | Daughter | — | Pennsylvania |
| 68 | Alice Cooper | 8 | Daughter | — | Pennsylvania |
| 69 | Eleanor Cooper | 7 | Daughter | — | Pennsylvania |
| 70 | John Cooper | 5 | Son | — | Pennsylvania |
| 71 | Joseph Cooper | 1 | Son | — | Pennsylvania |
| 72 | James Dawson | 26 | Brother-in-law | Helper | Pennsylvania |
| 73 | John A. Reed | 62 | Head | Upholstery | Pennsylvania |
| 74 | Eva G. Reed | 65 | Wife | — | Pennsylvania |
| 75 | John J. Reed | 27 | Son | Laborer | Pennsylvania |
| 76 | Fern Reed | 25 | Daughter-in-law | Housework | Pennsylvania |
| 77 | George Reed | 24 | Son | New Worker | Pennsylvania |
| 78 | John Jr. Reed | 4 | Grandson | — | Pennsylvania |
| 79 | Leila Durnell | 49 | Head | — | Pennsylvania |
| 80 | Philip Durnell | 53 | Son | — | Pennsylvania |
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)