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Mary Blackburn — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Shelby-County, Kentucky
Our Model Tree links this Mary Blackburn across the 1930 and 1940 US Censuses in Shelby-County, Kentucky (XGBoost, ~Confirmed) — first a daughter (b.~1922), then head of a 13-person household.
Age 18
b. ~1922
Female
Daughter
Born: Kentucky
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Shelby-County, Kentucky |
| Surname | Blackburn |
| Given Name | Mary K. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Kentucky |
| 1935 Residence (City) | Mag Dist #5 |
| 1935 Residence (County) | Shelby |
| Additional Details | |
| Highest Grade | No 8 |
| 1935 Residence | Same house |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
| Township / Ward | Mag Dist 5 |
| Est. Birth Year | ~1922 |
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.
13 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| James Blackburn | Son | — | 14 | ~1926 |
| Elythe Blackburn | Daughter | — | 4 | ~1936 |
| John Blackburn | Son | — | 9 | ~1931 |
| Dorothy Blackburn | Daughter | — | 2 | ~1938 |
| William Blackburn | Son | — | 11 | ~1929 |
| Rachel Blackburn | Spouse | — | 43 | ~1897 |
| Mary Blackburn | Daughter | — | 18 | ~1922 |
| Emma Blackburn | Daughter | — | 17 | ~1923 |
| Rose Blackburn | Daughter | — | 5 | ~1935 |
| Elmore Blackburn | Head | — | 56 | ~1884 |
| Vernice Blackburn | Daughter | — | 1 | ~1939 |
| Eugene Blackburn | Son | — | 15 | ~1925 |
| Martha Blackburn | Daughter | — | 8 | ~1932 |
Census Appearances
1930
Shelby, Kentucky
Daughter, age 8
Shelby, Kentucky · implied b. ~1922 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blackburn |
| Given Name | Mary Ky. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Kentucky |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1940
Shelby-County, Kentucky
Daughter, age 18
Shelby-County, Kentucky · implied b. ~1922 — 13 household members
| Surname | Blackburn |
| Given Name | Mary K. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Kentucky |
| 1935 Residence (City) | Mag Dist #5 |
| 1935 Residence (County) | Shelby |
| Highest Grade | No 8 |
| 1935 Residence | Same house |
| 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 Mary Blackburn across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Blackburn
Daughter · 1940 · age 18 · b. ~1922 · Kentucky
★ You are viewing this record
Sibling
John Blackburn
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Emma Blackburn
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elythe Blackburn
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Blackburn
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eugene Blackburn
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Blackburn
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Vernice Blackburn
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Blackburn
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Martha Blackburn
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rose Blackburn
Sibling · 1940 · age 5
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 — Shelby-County, Kentucky
Open full size
1940 US Federal Census — Shelby-County, Kentucky
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01356-00367)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Elmore Blackburn | 56 | Head | Farmer | Kentucky |
| 42 | Rachel Blackburn | 43 | Wife | — | Kentucky |
| 43 | Mary K. Blackburn THIS PERSON | 18 | Daughter | — | Kentucky |
| 44 | Emma Blackburn | 17 | Daughter | — | Kentucky |
| 45 | Eugene Blackburn | 15 | Son | — | Kentucky |
| 46 | James Blackburn | 14 | Son | — | Kentucky |
| 47 | William Blackburn | 11 | Son | — | Kentucky |
| 48 | John H. Blackburn | 9 | Son | — | Kentucky |
| 49 | Martha Blackburn | 8 | Daughter | — | Kentucky |
| 50 | Rose Blackburn | 5 | Daughter | — | Kentucky |
| 51 | Elythe Blackburn | 4 | Daughter | — | Kentucky |
| 52 | Dorothy Blackburn | 2 | Daughter | — | Kentucky |
| 53 | Vernice Blackburn | 1 | Daughter | — | Kentucky |
| 54 | Martha Ellison | 81 | Head | — | Kentucky |
| 55 | Lee Ellison | 43 | Son | Farm Labor | Kentucky |
| 56 | Fanny Ellison | 32 | Daughter-in-law | — | Kentucky |
| 57 | R. A. Renfro | 52 | Head | Carpenter | Kentucky |
| 58 | Rola Renfro | 44 | Wife | — | Kentucky |
| 59 | Dorothy Renfro | 19 | Daughter | — | Kentucky |
| 60 | Gladys Renfro | 15 | Daughter | — | Kentucky |
| 61 | Charles Renfro | 14 | Son | — | Kentucky |
| 62 | Marvin Renfro | 12 | Son | — | Kentucky |
| 63 | Virginia Renfro | 9 | Daughter | — | Kentucky |
| 64 | Tomey R. Renfro | 6 | Son | — | Kentucky |
| 65 | Willie Renfro | 54 | Head | Carpenter | Kentucky |
| 66 | Lutitia Renfro | 71 | Mother | — | Kentucky |
| 67 | Willard Harlow | 70 | Head | Farmer | Kentucky |
| 68 | Mattie Harlow | 53 | Wife | — | Kentucky |
| 69 | Tommy Harlow | 25 | Son | Farmer | Kentucky |
| 70 | Phyllis Harlow | 21 | Daughter-in-law | — | Kentucky |
| 71 | Silas Harlow | 63 | Brother | — | Kentucky |
| 72 | Russel Rodgers | 39 | Head | Farmer | Kentucky |
| 73 | Blanch Rodgers | 30 | Wife | — | Kentucky |
| 74 | Joyce Rodgers | 9 | Daughter | — | Kentucky |
| 75 | Joan A. Rodgers | 5 | Daughter | — | Kentucky |
| 76 | Judy C. Rodgers | 0 | Daughter | — | Kentucky |
| 77 | Norman Mccarty | 39 | Head | Farmer | Kentucky |
| 78 | Goldie Mccarty | 38 | Wife | — | Kentucky |
| 79 | Herbert Mccarty | 15 | Son | — | Kentucky |
| 80 | Lester Mccarty | 12 | Son | — | Kentucky |
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)