JC
Joseph Cooper — 1940 US Census Record
Model Tree available1940 United States Federal Census · Sussex-County, Delaware
Our Model Tree links this Joseph Cooper across the 1920, 1930 and 1940 US Censuses in Sussex-County, Delaware (XGBoost, ~Confirmed), with identified parents Mary & Robert — first a son (b.~1914), then head of a 6-person household.
Age 26
b. ~1914
Male
Son
Born: Delaware
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Sussex-County, Delaware |
| Surname | Cooper |
| Given Name | Joseph R. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Delaware |
| 1935 Residence (City) | Representative District 4 Little Creek Hundred |
| 1935 Residence (County) | Sussex |
| Additional Details | |
| Occupation | Painter |
| Industry | Painting Houses |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 340 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Delaware |
| Birth Country | United States |
| Birthplace (normalized) | delaware |
| Occupation | Painter |
| Township / Ward | Representative District 4 Little Creek Hundred |
| Est. Birth Year | ~1914 |
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 Joseph | Age | Birth yr |
|---|---|---|---|---|
| Mary Cooper | Spouse | — | 48 | ~1892 |
| Joseph Cooper | Son | — | 26 | ~1914 |
| Robert Cooper | Head | — | 48 | ~1892 |
| Dorothy Cooper | Daughter | — | 11 | ~1929 |
| Alinicia Cooper | Daughter | — | 14 | ~1926 |
| Roland Cooper | Son | — | 21 | ~1919 |
Census Appearances
1920
Sussex, Delaware
Son, age 5
Sussex, Delaware · implied b. ~1915 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cooper |
| Given Name | Joseph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Delaware |
| Father's Birthplace | Delaware |
| Mother's Birthplace | Delaware |
| Birth State | Delaware |
| Birth Country | United States |
| Birthplace (normalized) | delaware |
1930
Sussex, Delaware
Son, age 16
Sussex, Delaware · implied b. ~1914 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cooper |
| Given Name | Joseph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Delaware |
| Father's Birthplace | Delaware |
| Mother's Birthplace | Pennsylvania |
| Occupation | Laborer |
| Industry | Truck Farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Delaware |
| Birth Country | United States |
| Birthplace (normalized) | delaware |
1940
Sussex-County, Delaware
Son, age 26
Sussex-County, Delaware · implied b. ~1914 — 6 household members
| Surname | Cooper |
| Given Name | Joseph R. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Delaware |
| 1935 Residence (City) | Representative District 4 Little Creek Hundred |
| 1935 Residence (County) | Sussex |
| Occupation | Painter |
| Industry | Painting Houses |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 340 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Delaware |
| Birth Country | United States |
| Birthplace (normalized) | delaware |
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 Joseph Cooper across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Mary Cooper (~0.92 confidence) and father Robert Cooper (~0.92 confidence) and mother Mary Cooper (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Mary Cooper
b. ~1892
Source mother
● Household
· direct · ~0.92
Father
Robert Cooper
b. ~1893
Source father
● Household
· direct · ~0.92
Mother
Mary Cooper
b. ~1897
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Joseph Cooper
Son · 1940 · age 26 · b. ~1914 · Delaware
★ You are viewing this record
Sibling
Dorothy Cooper
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Roland Cooper
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alinicia Cooper
Sibling · 1940 · age 14
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 — Sussex-County, Delaware
Open full size
1940 US Federal Census — Sussex-County, Delaware
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00548-00122)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John H. O. Steele | 49 | Head | Farming | Delaware |
| 2 | Margaret C. Steele | 17 | Daughter | — | Delaware |
| 3 | Adelia White | 59 | Lodger | — | Delaware |
| 4 | Earl S. Pippin | 37 | Head | Salesman | Delaware |
| 5 | Evel C. Pippin | 23 | Wife | — | Delaware |
| 6 | Amala R. Pippin | 2 | Son | — | Delaware |
| 7 | David H. O. Means | 46 | Head | Farm | Delaware |
| 8 | Ethel G. Means | 45 | Wife | — | Delaware |
| 9 | James B. Means | 18 | Son | Farming | Delaware |
| 10 | Kathrine Means | 8 | Daughter | — | Delaware |
| 11 | Robert W. O. Cooper | 48 | Head | Farm | Delaware |
| 12 | Mary S. Cooper | 48 | Wife | — | Pennsylvania |
| 13 | Joseph R. Cooper THIS PERSON | 26 | Son | Painter | Delaware |
| 14 | Roland J. Cooper | 21 | Son | Truck Driver | Delaware |
| 15 | Alinicia R. Cooper | 14 | Daughter | — | Delaware |
| 16 | Dorothy E. Cooper | 11 | Daughter | — | Delaware |
| 17 | George W. O. Marvel | 60 | Head | Farm | Delaware |
| 18 | Lila Marvel | 61 | Wife | — | Delaware |
| 19 | Elsie K. Marvel | 27 | Daughter | — | Delaware |
| 20 | Byard Buttingham | 22 | Head | Farming | Delaware |
| 21 | Helen V. O. Buttingham | 21 | Wife | — | Delaware |
| 22 | Donald B. V. Buttingham | 0 | Son | — | Delaware |
| 23 | Jean Savage | 60 | Head | Laborer | Maryland |
| 24 | Herbert P. King | 20 | Head | Farm | Delaware |
| 25 | Blanche K. King | 20 | Wife | — | Delaware |
| 26 | Donis R. King | 0 | Son | — | Delaware |
| 27 | Theodoshia G. O. Short | 75 | Head | — | Delaware |
| 28 | Larry Haleter | 39 | Head | Farming | Delaware |
| 29 | Edith May Haleter | 34 | Wife | — | Delaware |
| 30 | Margaret Haleter | 13 | Daughter | — | Delaware |
| 31 | Elwood W. Haleter | 10 | Son | — | Delaware |
| 32 | Reese L. Haleter | 8 | Son | — | Delaware |
| 33 | Ray Haleter | 3 | Son | — | Delaware |
| 34 | Guiley O. Johnson | 60 | Head | Farming | Delaware |
| 35 | Doris Effie Johnson | 58 | Housekeeper | — | Delaware |
| 36 | Annie Marvel | 70 | Head | — | Delaware |
| 37 | George D. O. Barrett | 63 | Head | Garden | Delaware |
| 38 | Ida S. Barrett | 53 | Wife | — | Delaware |
| 39 | Joshua J. Barrett | 26 | Son | Teacher School | Delaware |
| 40 | Janet Barrett | 26 | Daughter-in-law | — | Delaware |
Related Census Records
Pedigree Summary
Joseph + 3 siblings
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)