MB
Mary Blackwell — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Washington-County, Virginia
Our Model Tree links this Mary Blackwell across the 1930 and 1940 US Censuses in Washington-County, Virginia (XGBoost, ~Confirmed) — first a daughter (b.~1926), then head of a 10-person household.
Age 14
b. ~1926
Female
Daughter
Born: Virginia
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Washington-County, Virginia |
| Surname | Blackwell |
| Given Name | Mary Bell |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Virginia |
| 1935 Residence (City) | Saltville District |
| 1935 Residence (County) | Washington |
| Additional Details | |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth State | Virginia |
| Birth Country | United States |
| Birthplace (normalized) | virginia |
| Township / Ward | Saltville District |
| Est. Birth Year | ~1926 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Blackwell | Daughter | — | 14 | ~1926 |
| Ernest Blackwell | Son | — | 13 | ~1927 |
| Geneva Blackwell | Daughter | — | 8 | ~1932 |
| Sallie Blackwell | Spouse | — | 43 | ~1897 |
| Roscoe Blackwell | Son | — | 10 | ~1930 |
| Lucille Blackwell | Daughter | — | 20 | ~1920 |
| Isabelle Blackwell | Other | — | 95 | ~1845 |
| Clarence Blackwell | Son | — | 18 | ~1922 |
| Virgie Blackwell | Daughter | — | 17 | ~1923 |
| Palmer Blackwell | Son | — | 16 | ~1924 |
Census Appearances
1930
Washington, Virginia
Daughter, age 4
Washington, Virginia · implied b. ~1926 — 49 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blackwell |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Virginia |
| Father's Birthplace | Virginia |
| Mother's Birthplace | Virginia |
| Can Read/Write | No |
| Birth State | Virginia |
| Birth Country | United States |
| Birthplace (normalized) | virginia |
1940
Washington-County, Virginia
Daughter, age 14
Washington-County, Virginia · implied b. ~1926 — 10 household members
| Surname | Blackwell |
| Given Name | Mary Bell |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Virginia |
| 1935 Residence (City) | Saltville District |
| 1935 Residence (County) | Washington |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth State | Virginia |
| Birth Country | United States |
| Birthplace (normalized) | virginia |
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 Blackwell across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Blackwell
Daughter · 1940 · age 14 · b. ~1926 · Virginia
★ You are viewing this record
Sibling
Clarence Blackwell
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lucille Blackwell
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Virgie Blackwell
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Palmer Blackwell
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Roscoe Blackwell
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Geneva Blackwell
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ernest Blackwell
Sibling · 1940 · age 13
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 — Washington-County, Virginia
Open full size
1940 US Federal Census — Washington-County, Virginia
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-04300-01013)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Sallie Blackwell | 43 | Wife | — | Virginia |
| 42 | Lucille Blackwell | 20 | Daughter | — | Virginia |
| 43 | Clarence Blackwell | 18 | Son | Farmer | Virginia |
| 44 | Virgie Blackwell | 17 | Daughter | — | Virginia |
| 45 | Palmer Blackwell | 16 | Son | Farmer | Virginia |
| 46 | Mary Bell Blackwell THIS PERSON | 14 | Daughter | — | Virginia |
| 47 | Ernest Blackwell | 13 | Son | — | Virginia |
| 48 | Roscoe Blackwell | 10 | Son | — | Virginia |
| 49 | Geneva Blackwell | 8 | Daughter | — | Virginia |
| 50 | Isabelle Blackwell | 95 | Mother | — | Virginia |
| 51 | Harman Colley | 31 | Head | Farmer | Virginia |
| 52 | Omah Colley | 23 | Wife | — | Virginia |
| 53 | James Lee Colley | 7 | Son | — | Virginia |
| 54 | Robert Thompson | 35 | Head | Farmer | Virginia |
| 55 | Lou Ella Thompson | 33 | Wife | — | Virginia |
| 56 | Virginia Thompson | 8 | Daughter | — | Virginia |
| 57 | Kay Francis Thompson | 6 | Daughter | — | Virginia |
| 58 | Wayne Lee Thompson | 4 | Son | — | Virginia |
| 59 | Margaret Thompson | 3 | Daughter | — | Virginia |
| 60 | Louise Belvins | 17 | — | Housekeeper | Virginia |
| 61 | Andrew Arnett | 84 | Head | — | Virginia |
| 62 | Mary Arnett | 63 | Wife | — | Virginia |
| 63 | Fletcher Arnett | 33 | Son | Time Keeper | Virginia |
| 64 | Lelia Arnett | 34 | Daughter-in-law | — | Virginia |
| 65 | Palmer Arnett | 7 | Granddaughter | — | Virginia |
| 66 | James Oscar Arnett | 5 | Grandson | — | Virginia |
| 67 | George S. Arnett | 2 | Grandson | — | Virginia |
| 68 | Egbert William Arnett | 0 | Grandson | — | Virginia |
| 69 | Homer Martin | 36 | Head | Trader | Virginia |
| 70 | Elizabeth Martin | 35 | Wife | — | Virginia |
| 71 | Audrey Martin | 16 | Daughter | — | Virginia |
| 72 | Ernestine Martin | 15 | Daughter | — | Virginia |
| 73 | Earl Martin | 14 | Son | — | Virginia |
| 74 | Ora Lee Martin | 12 | Daughter | — | Virginia |
| 75 | Reta Mae Martin | 10 | Daughter | — | Virginia |
| 76 | Evelyn Martin | 7 | Daughter | — | Virginia |
| 77 | Wanda Martin | 5 | Daughter | — | Virginia |
| 78 | Eva Martin | 3 | Daughter | — | Virginia |
| 79 | Fullen Martin | 1 | Son | — | Virginia |
| 80 | George Herndon | 67 | Head | Clerk | Virginia |
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)