MC
Mary Cooper — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Williamsburg-County, South Carolina
Our Model Tree links this Mary Cooper across the 1920, 1930 and 1940 US Censuses in Williamsburg-County, South Carolina (XGBoost, ~Confirmed) — first a spouse (b.~1888), then head of a 8-person household.
Age 52
b. ~1888
Female
Spouse
Born: South Carolina
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Williamsburg-County, South Carolina |
| Surname | Cooper |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 52 |
| Marital Status | Married |
| Birthplace | South Carolina |
| 1935 Residence (City) | Ridge Township |
| 1935 Residence (County) | Williamsburg |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | No 4 |
| 1935 Residence | Same place |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
| Township / Ward | Ridge Township |
| Est. Birth Year | ~1888 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Dessa Cooper | Daughter | — | 7 | ~1933 |
| Sammy Cooper | Head | — | 56 | ~1884 |
| Clyde Cooper | Son | — | 5 | ~1935 |
| London Cooper | Son | — | 26 | ~1914 |
| Sam Cooper | Son | — | 19 | ~1921 |
| Henry Cooper | Son | — | 12 | ~1928 |
| James Cooper | Son | — | 17 | ~1923 |
| Mary Cooper | Spouse | — | 52 | ~1888 |
Census Appearances
1920
Williamsburg, South …
Spouse, age 32
Williamsburg, South Carolina · implied b. ~1888 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cooper |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 32 |
| Marital Status | Married |
| Birthplace | South Carolina |
| Father's Birthplace | South Carolina |
| Mother's Birthplace | South Carolina |
| Occupation | none |
| Can Read | No |
| Can Write | No |
| Speaks English | Yes |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
1930
Williamsburg, South …
Spouse, age 43
Williamsburg, South Carolina · implied b. ~1887 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cooper |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 43 |
| Marital Status | Married |
| Birthplace | South Carolina |
| Age at First Marriage | 17 |
| Father's Birthplace | South Carolina |
| Mother's Birthplace | South Carolina |
| Occupation | Labour |
| Industry | Farm |
| Class of Worker | W |
| Can Read/Write | No |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
1940
Williamsburg-County, South …
Spouse, age 52
Williamsburg-County, South Carolina · implied b. ~1888 — 8 household members
| Surname | Cooper |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 52 |
| Marital Status | Married |
| Birthplace | South Carolina |
| 1935 Residence (City) | Ridge Township |
| 1935 Residence (County) | Williamsburg |
| Class of Worker | 0 |
| Highest Grade | No 4 |
| 1935 Residence | Same place |
| Birth State | South Carolina |
| Birth Country | United States |
| Birthplace (normalized) | south carolina |
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 Mary Cooper across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Cooper
Spouse · 1940 · age 52 · b. ~1888 · South Carolina
★ 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 — Williamsburg-County, South Carolina
Open full size
1940 US Federal Census — Williamsburg-County, South Carolina
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03844-00812)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Oliver Barr | 58 | Head | Operator | South Carolina |
| 42 | Flora Barr | 52 | Wife | — | South Carolina |
| 43 | Rosia Barr | 22 | Daughter | — | South Carolina |
| 44 | Joe Barr | 20 | Son | Farm Laborer | South Carolina |
| 45 | Bell Barr | 16 | Daughter | — | South Carolina |
| 46 | Bookertee Barr | 14 | Son | — | South Carolina |
| 47 | Sarah Carington | 62 | Head | Operator | South Carolina |
| 48 | O. A. Johnston | 49 | Brother | — | South Carolina |
| 49 | Pearl Johnston | 30 | Wife | — | South Carolina |
| 50 | Maude Ruth Johnston | 12 | Niece | — | South Carolina |
| 51 | Doris Ellen Johnston | 4 | Niece | — | South Carolina |
| 52 | H. J. Foxworth | 34 | Head | Operator | South Carolina |
| 53 | Alice Foxworth | 30 | Wife | — | South Carolina |
| 54 | Henry G. Foxworth | 12 | Son | — | South Carolina |
| 55 | Wesley Foxworth | 11 | Son | — | South Carolina |
| 56 | Roland Foxworth | 10 | Son | — | South Carolina |
| 57 | Bobbie Foxworth | 5 | Son | — | South Carolina |
| 58 | Joe Cooper | 27 | Head | Operator | South Carolina |
| 59 | Naomi Cooper | 25 | Wife | Teacher | South Carolina |
| 60 | Daphney Cooper | 1 | Son | — | South Carolina |
| 61 | Dathia Cooper | 65 | Mother | — | South Carolina |
| 62 | Stanie Cooper | 35 | Sister | Teacher | South Carolina |
| 63 | Lorraine Cooper | 19 | Sister | — | South Carolina |
| 64 | Lizzie Cooper | 27 | Sister | Nurse | South Carolina |
| 65 | William Cooper | 15 | Nephew | — | South Carolina |
| 66 | Sammy O. Cooper | 56 | Head | Operator | South Carolina |
| 67 | Mary Cooper THIS PERSON | 52 | Wife | — | South Carolina |
| 68 | London Cooper | 26 | Son | Farm Laborer | South Carolina |
| 69 | Sam Cooper | 19 | Son | Farm Laborer | South Carolina |
| 70 | James Cooper | 17 | Son | — | South Carolina |
| 71 | Henry Cooper | 12 | Son | — | South Carolina |
| 72 | Dessa Cooper | 7 | Daughter | — | South Carolina |
| 73 | Clyde Cooper | 5 | Son | — | South Carolina |
| 74 | George Jr. Barr | 27 | Head | Operator | South Carolina |
| 75 | Isabel Barr | 23 | Wife | — | South Carolina |
| 76 | Earlina Barr | 4 | Daughter | — | South Carolina |
| 77 | Jeanetta Barr | 2 | Daughter | — | South Carolina |
| 78 | Elizabeth Mcknight | 58 | Head | Operator | South Carolina |
| 79 | Annie Mcknight | 38 | Daughter | — | South Carolina |
| 80 | Hattie Mcknight | 30 | Daughter | — | South Carolina |
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)