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John Blackwell — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Greenville-County, South Carolina
Our Model Tree links this John Blackwell across the 1930 and 1940 US Censuses in Greenville-County, South Carolina (XGBoost, ~Confirmed) — first a head (b.~1901), then head of a 10-person household.
Age 39
b. ~1901
Male
Head
Born: North Carolina
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Greenville-County, South Carolina |
| Surname | Blackwell |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | North Carolina |
| 1935 Residence (City) | Glassy Mountain |
| 1935 Residence (County) | Greenville |
| Additional Details | |
| Occupation | Laborer |
| Industry | Boy Scout Camp |
| Class of Worker | PW |
| Hours Worked | 18 |
| Income (1939) | 264 |
| Highest Grade | No 0 |
| 1935 Residence | Same place |
| Birth State | North Carolina |
| Birth Country | United States |
| Birthplace (normalized) | north carolina |
| Occupation | Laborer |
| Township / Ward | Glassy Mountain |
| Est. Birth Year | ~1901 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Ramick Blackwell | Son | — | 12 | ~1928 |
| Arnell Blackwell | Son | — | 9 | ~1931 |
| Margaret Blackwell | Daughter | — | 4 | ~1936 |
| Agnes Blackwell | Spouse | — | 45 | ~1895 |
| Gertrude Dormley | Daughter | — | 45 | ~1895 |
| John Blackwell | Head | — | 39 | ~1901 |
| Magdaline Blackwell | Daughter | — | 16 | ~1924 |
| Claude Dormley | Son | — | 25 | ~1915 |
| Johnnie Blackwell | Son | — | 2 | ~1938 |
| Keith Blackwell | Son | — | 7 | ~1933 |
Census Appearances
1930
Greenville, South …
Head, age 29
Greenville, South Carolina · implied b. ~1901 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blackwell |
| Given Name | John A. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Married |
| Birthplace | North Carolina |
| Age at First Marriage | 22 |
| Father's Birthplace | North Carolina |
| Mother's Birthplace | North Carolina |
| Occupation | Farmer |
| Industry | Corn Crop |
| Class of Worker | OA |
| Can Read/Write | No |
| Home Owned/Rented | R |
| Veteran | No |
| Birth State | North Carolina |
| Birth Country | United States |
| Birthplace (normalized) | north carolina |
1940
Greenville-County, South …
Head, age 39
Greenville-County, South Carolina · implied b. ~1901 — 10 household members
| Surname | Blackwell |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | North Carolina |
| 1935 Residence (City) | Glassy Mountain |
| 1935 Residence (County) | Greenville |
| Occupation | Laborer |
| Industry | Boy Scout Camp |
| Class of Worker | PW |
| Hours Worked | 18 |
| Income (1939) | 264 |
| Highest Grade | No 0 |
| 1935 Residence | Same place |
| Birth State | North Carolina |
| Birth Country | United States |
| Birthplace (normalized) | north 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 John Blackwell across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Blackwell
Head · 1940 · age 39 · b. ~1901 · South Carolina
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Greenville-County, South Carolina
Open full size
1940 US Federal Census — Greenville-County, South Carolina
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03811-01116)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | J. D. Blackwell | 8 | Son | — | South Carolina |
| 42 | Marshal Blackwell | 6 | Son | — | South Carolina |
| 43 | Woodrow Blackwell | 4 | Son | — | South Carolina |
| 44 | Arline Blackwell | 1 | Son | — | South Carolina |
| 45 | John Blackwell THIS PERSON | 39 | Head | Laborer | North Carolina |
| 46 | Agnes Blackwell | 45 | Wife | — | South Carolina |
| 47 | Magdaline Blackwell | 16 | Daughter | Maid | South Carolina |
| 48 | Ramick Lee Blackwell | 12 | Son | — | South Carolina |
| 49 | Arnell Blackwell | 9 | Son | — | South Carolina |
| 50 | Keith Blackwell | 7 | Son | — | South Carolina |
| 51 | Margaret Blackwell | 4 | Daughter | — | South Carolina |
| 52 | Johnnie Joe Blackwell | 2 | Son | — | South Carolina |
| 53 | Gertrude Dormley | 45 | Daughter | — | South Carolina |
| 54 | Claude Dormley | 25 | Son | Laborer | South Carolina |
| 55 | Mark Ballew | 47 | Head | Carpenter | North Carolina |
| 56 | Delora Ballew | 48 | Wife | — | Kentucky |
| 57 | Della Plumley | 54 | Head | Farmer | South Carolina |
| 58 | Fred Plumley | 28 | Son | Laborer | South Carolina |
| 59 | Earl Plumley | 26 | Son | Laborer | South Carolina |
| 60 | Audrey Plumley | 12 | Daughter | — | South Carolina |
| 61 | Nellie Plumley | 8 | Daughter | — | South Carolina |
| 62 | Edgar Plumley | 34 | Son | — | South Carolina |
| 63 | John W. Lankford | 48 | Head | Caretaker | North Carolina |
| 64 | Dorothy J. Lankford | 49 | Wife | — | North Carolina |
| 65 | Dorothy L. Lankford | 28 | Daughter | — | North Carolina |
| 66 | Darcie B. Lindsey | 34 | Head | Plumber | South Carolina |
| 67 | Naomi D. Lindsey | 30 | Wife | — | South Carolina |
| 68 | Betty D. Lindsey | 6 | Daughter | — | South Carolina |
| 69 | James D. Lindsey | 0 | Son | — | North Carolina |
| 70 | Allen A. Ashley | 40 | Head | Truck Driver | Oklahoma |
| 71 | Mary A. Ashley | 40 | Wife | — | Oklahoma |
| 72 | Ruby A. Ashley | 9 | Daughter | — | Oklahoma |
| 73 | Allen J. Jr. Ashley | 7 | Son | — | Oklahoma |
| 74 | Polly A. Ashley | 5 | Daughter | — | Oklahoma |
| 75 | Richard Durham | 58 | Head | — | South Carolina |
| 76 | J. Frank Mcdade | 49 | Lodger | — | South Carolina |
| 77 | Smokey J. Campbell | 33 | Head | Farmer | South Carolina |
| 78 | Ola D. Campbell | 33 | Wife | — | South Carolina |
| 79 | James Campbell | 11 | Son | — | South Carolina |
| 80 | Frank Campbell | 6 | Son | — | 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)