WC
William Cooper — 1940 US Census Record
Model Tree available1940 United States Federal Census · Wicomico-County, Maryland
Our Model Tree links this William Cooper across the 1920, 1930 and 1940 US Censuses in Wicomico-County, Maryland (XGBoost, ~Confirmed), with identified parents Clifford & Samuel — first a head (b.~1913), then head of a 4-person household.
Age 27
b. ~1913
Male
Head
Born: Maryland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Wicomico-County, Maryland |
| Surname | Cooper |
| Given Name | William H. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Election District 7 |
| 1935 Residence (County) | Wicomico |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 60 |
| Income (1939) | 0 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Farmer |
| Township / Ward | Election District 7 |
| Est. Birth Year | ~1913 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| F Cooper | Daughter | — | 3 | ~1937 |
| William Cooper | Head | — | 27 | ~1913 |
| William Cooper | Son | — | ~1940 | |
| Anita Cooper | Spouse | — | 21 | ~1919 |
Census Appearances
1920
None, Maryland
Son, age 8
None, Maryland · implied b. ~1912 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cooper |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | none |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Wicomico, Maryland
Son, age 19
Wicomico, Maryland · implied b. ~1911 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cooper |
| Given Name | William H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Laborer |
| Industry | Truck farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Wicomico-County, Maryland
Head, age 27
Wicomico-County, Maryland · implied b. ~1913 — 4 household members
| Surname | Cooper |
| Given Name | William H. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Election District 7 |
| 1935 Residence (County) | Wicomico |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 60 |
| Income (1939) | 0 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
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 William Cooper across 3 US Census years (1920, 1930 and 1940) in 3 locations, using XGBoost record linkage. Identified parents: father Clifford Cooper (~0.92 confidence) and father Samuel Cooper (~0.92 confidence) and mother Sarah Cooper (~0.92 confidence) and mother Sallie Cooper (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Clifford Cooper
b. ~1881
Source father
● Household
· direct · ~0.92
Father
Samuel Cooper
b. ~1882
Source father
● Household
· direct · ~0.92
Mother
Sarah Cooper
b. ~1883
Source mother
● Household
· direct · ~0.92
Mother
Sallie Cooper
b. ~1888
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Cooper
Head · 1940 · age 27 · b. ~1913 · Maryland
★ 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 — Wicomico-County, Maryland
Open full size
1940 US Federal Census — Wicomico-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01563-00638)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Ellen Cox | 15 | Daughter | — | Maryland |
| 2 | Gordon Cox | 12 | Son | — | Maryland |
| 3 | Robert Cox | 11 | Son | — | Maryland |
| 4 | Hazel Cox | 10 | Daughter | — | Maryland |
| 5 | Kenneth Cox | 8 | Son | — | Maryland |
| 6 | David Cox | 5 | Son | — | Maryland |
| 7 | Margaret M. Smith | 33 | Head | Farmer | Maryland |
| 8 | Cloudeus Smith | 15 | Son | Farmer | Delaware |
| 9 | James Smith | 6 | Son | — | Maryland |
| 10 | Ernest O. Simmons | 56 | Head | Farmer | Maryland |
| 11 | Mason Simmons | 23 | Son | Farmer | Maryland |
| 12 | Martha Simmons | 20 | Daughter | — | Maryland |
| 13 | Charles W. Simmons | 52 | Head | Farm Laborer | Maryland |
| 14 | Carlo W. Mills | 50 | Head | Farmer | Maryland |
| 15 | Bessie M. Mills | 47 | Wife | — | Maryland |
| 16 | Arthur William Cooper | 59 | Head | Farmer | Germany |
| 17 | Kay D. Helen Cooper | 57 | Wife | — | Maryland |
| 18 | Howard Cooper | 25 | Son | Farmer | Pennsylvania |
| 19 | William H. Cooper THIS PERSON | 27 | Head | Farmer | Maryland |
| 20 | Anita P. Cooper | 21 | Wife | — | Maryland |
| 21 | F. Jean Cooper | 3 | Daughter | — | Maryland |
| 22 | William H. Jr. Cooper | 0 | Son | — | Maryland |
| 23 | William John James | 29 | Head | Trucker | Maryland |
| 24 | Irene E. James | 28 | Wife | — | Maryland |
| 25 | Patricia M. James | 7 | Daughter | — | Maryland |
| 26 | Carlton Causey | 22 | Head | Laborer | Maryland |
| 27 | Ida Causey | 21 | Wife | — | Maryland |
| 28 | Lucila Causey | 3 | Daughter | — | Maryland |
| 29 | Mary Anne Causey | 0 | Daughter | — | Maryland |
| 30 | Henry J. Marshall | 23 | Head | Farm Laborer | Maryland |
| 31 | Linda R. Marshall | 48 | Wife | — | Maryland |
| 32 | Barbara D. Marshall | 12 | Daughter | — | Maryland |
| 33 | Denny Dines | 16 | Brother-in-law | — | Maryland |
| 34 | Luther Banks | 48 | Head | Laborer | Maryland |
| 35 | Dennis Banks | 22 | Son | Farm Laborer | Maryland |
| 36 | Alvin Pentcost | 24 | Son-in-law | Farm Laborer | Maryland |
| 37 | Doreen Pentcost | 28 | Daughter | Farm Laborer | Maryland |
| 38 | Raymond Jones | 25 | Head | Farm Laborer | Maryland |
| 39 | Missouri Jones | 27 | Wife | Farm Laborer | Maryland |
| 40 | Margaret Jones | 19 | Sister | Farm Laborer | Maryland |
Pedigree Summary
William
Gen 1 · 4 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)