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John Blackburn — 1940 US Census Record
Model Tree available1940 United States Federal Census · Rockcastle-County, Kentucky
Our Model Tree links this John Blackburn across the 1920, 1930 and 1940 US Censuses in Rockcastle-County, Kentucky (XGBoost, ~Confirmed), with identified parents Charlie & Chas — first a son (b.~1915), then head of a 9-person household.
Age 25
b. ~1915
Male
Son
Born: Kentucky
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Rockcastle-County, Kentucky |
| Surname | Blackburn |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Kentucky |
| 1935 Residence (City) | nr |
| 1935 Residence (County) | Rockcastle |
| Additional Details | |
| Occupation | Coal Miner |
| Industry | Coal Mining |
| Class of Worker | OA |
| Hours Worked | 60 |
| Income (1939) | 0 |
| Highest Grade | 5 |
| 1935 Residence | Same place |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
| Occupation | Coal Miner |
| Township / Ward | Nr |
| Est. Birth Year | ~1915 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Bessie Blackburn | Spouse | — | 47 | ~1893 |
| Charlie Blackburn | Head | — | 56 | ~1884 |
| Jean Blackburn | Daughter | — | 5 | ~1935 |
| Jack Blackburn | Son | — | 10 | ~1930 |
| John Blackburn | Son | — | 25 | ~1915 |
| Thomas Blackburn | Son | — | 15 | ~1925 |
| Sam Blackburn | Son | — | 22 | ~1918 |
| Flora Blackburn | Daughter | — | 19 | ~1921 |
| Mae Blackburn | Daughter | — | 17 | ~1923 |
Census Appearances
1920
Rockcastle, Kentucky
Son, age 5
Rockcastle, Kentucky · implied b. ~1915 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blackburn |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Kentucky |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1930
Rockcastle, Kentucky
Son, age 15
Rockcastle, Kentucky · implied b. ~1915 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blackburn |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Kentucky |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Can Read/Write | Yes |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1940
Rockcastle-County, Kentucky
Son, age 25
Rockcastle-County, Kentucky · implied b. ~1915 — 9 household members
| Surname | Blackburn |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Kentucky |
| 1935 Residence (City) | nr |
| 1935 Residence (County) | Rockcastle |
| Occupation | Coal Miner |
| Industry | Coal Mining |
| Class of Worker | OA |
| Hours Worked | 60 |
| Income (1939) | 0 |
| Highest Grade | 5 |
| 1935 Residence | Same place |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
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 Blackburn across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Charlie Blackburn (~0.92 confidence) and father Chas Blackburn (~0.92 confidence) and mother Bessie Blackburn (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Charlie Blackburn
b. ~1886
Source father
● Household
· direct · ~0.92
Father
Chas Blackburn
b. ~1884
Source father
● Household
· direct · ~0.92
Mother
Bessie Blackburn
b. ~1893
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Blackburn
Son · 1940 · age 25 · b. ~1915 · Kentucky
★ You are viewing this record
Sibling
Thomas Blackburn
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jack Blackburn
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Flora Blackburn
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jean Blackburn
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Sam Blackburn
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mae Blackburn
Sibling · 1940 · age 17
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 — Rockcastle-County, Kentucky
Open full size
1940 US Federal Census — Rockcastle-County, Kentucky
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01353-00169)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Herbert D. Bullock | 37 | Head | Farmer | Kentucky |
| 42 | Mary Bullock | 42 | Wife | — | Kentucky |
| 43 | Edward Bullock | 15 | Son | Farm Helper | Kentucky |
| 44 | Ruby Bullock | 15 | Daughter | — | Kentucky |
| 45 | James Frederick | 36 | Head | — | Kentucky |
| 46 | Beulah D. Frederick | 33 | Wife | Seamstress | Kentucky |
| 47 | Chloe C. Frederick | 12 | Daughter | — | Kentucky |
| 48 | Joyce Faye Frederick | 5 | Daughter | — | Kentucky |
| 49 | Sue Anne Frederick | 1 | Daughter | — | Kentucky |
| 50 | James Mullins | 49 | Head | Berry Driller | Kentucky |
| 51 | Stella D. Mullins | 38 | Wife | — | Kentucky |
| 52 | Rubina Mullins | 69 | Mother-in-law | — | Kentucky |
| 53 | James Arthur Mullins | 15 | Nephew | — | Kentucky |
| 54 | Robert Bussell | 15 | Lodger | — | Kentucky |
| 55 | Ella Owens | 49 | Head | — | Kentucky |
| 56 | Raymond Owens | 25 | Son | Truck Driver | Kentucky |
| 57 | Woodrow Owens | 20 | Son | N.Y.A. | Kentucky |
| 58 | Ada D. Owens | 17 | Daughter | — | Kentucky |
| 59 | Lester Owens | 15 | Son | — | Kentucky |
| 60 | Nadine Owens | 6 | Daughter | — | Kentucky |
| 61 | Sherman Jones | 26 | Head | Truck Driver | Kentucky |
| 62 | Lucy Jones | 32 | Wife | — | Kentucky |
| 63 | Hazel R. Jones | 12 | Son | — | Kentucky |
| 64 | Charlie D. Adams | 64 | Head | Bridge | Kentucky |
| 65 | Lola Adams | 40 | Wife | — | Kentucky |
| 66 | Connie Adams | 36 | Son | — | Kentucky |
| 67 | Gertrude Adams | 15 | Daughter | — | Kentucky |
| 68 | Charles Adams | 8 | Son | — | Kentucky |
| 69 | Thomas J. Adams | 6 | Son | — | Kentucky |
| 70 | Charlie Blackburn | 56 | Head | Truck Driver And Farmer | Kentucky |
| 71 | Bessie D. Blackburn | 47 | Wife | — | Kentucky |
| 72 | John Blackburn THIS PERSON | 25 | Son | Coal Miner | Kentucky |
| 73 | Sam Blackburn | 22 | Son | Farm Helper | Kentucky |
| 74 | Flora Blackburn | 19 | Daughter | — | Kentucky |
| 75 | Mae Blackburn | 17 | Daughter | — | Kentucky |
| 76 | Thomas J. Blackburn | 15 | Son | Farm Helper | Kentucky |
| 77 | Jack Blackburn | 10 | Son | — | Kentucky |
| 78 | Jean Blackburn | 5 | Daughter | — | Kentucky |
| 79 | Shirley Adams | 25 | Head | Farm Helper | Kentucky |
| 80 | Florence D. Adams | 21 | Wife | — | Kentucky |
Pedigree Summary
John + 6 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)