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John Blair — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Johnson-County, Kentucky
Our Model Tree links this John Blair across the 1920, 1930 and 1940 US Censuses in Johnson-County, Kentucky (XGBoost, ~Confirmed) — first a head (b.~1872), then head of a 3-person household.
Age 68
b. ~1872
Male
Head
Born: Kentucky
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Johnson-County, Kentucky |
| Surname | Blair |
| Given Name | John M. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 68 |
| Marital Status | Married |
| Birthplace | Kentucky |
| 1935 Residence (City) | Magisterial Dist. No. 1 |
| 1935 Residence (County) | Johnson |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | No 0 |
| 1935 Residence | Same place |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
| Township / Ward | Magisterial Dist No 1 |
| Est. Birth Year | ~1872 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Ruby Spradlin | Daughter | — | 10 | ~1930 |
| John Blair | Head | — | 68 | ~1872 |
| Neva Blair | Spouse | — | 38 | ~1902 |
Census Appearances
1920
Johnson, Kentucky
Head, age 51
Johnson, Kentucky · implied b. ~1869 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blair |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | Kentucky |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Occupation | Farmer |
| Industry | General farm |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | O |
| Home Free/Mortgaged | F |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1930
Johnson, Kentucky
Head, age 61
Johnson, Kentucky · implied b. ~1869 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blair |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 61 |
| Marital Status | Married |
| Birthplace | Kentucky |
| Age at First Marriage | 28 |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Occupation | Farmer |
| Industry | General Farm |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Veteran | No |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1940
Johnson-County, Kentucky
Head, age 68
Johnson-County, Kentucky · implied b. ~1872 — 3 household members
| Surname | Blair |
| Given Name | John M. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 68 |
| Marital Status | Married |
| Birthplace | Kentucky |
| 1935 Residence (City) | Magisterial Dist. No. 1 |
| 1935 Residence (County) | Johnson |
| Class of Worker | 0 |
| Highest Grade | No 0 |
| 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 Blair across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Blair
Head · 1940 · age 68 · b. ~1872 · Kentucky
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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 — Johnson-County, Kentucky
Open full size
1940 US Federal Census — Johnson-County, Kentucky
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01322-00421)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Minnie Castle | 10 | Daughter | — | Kentucky |
| 42 | Alice Janette Castle | 5 | Daughter | — | Kentucky |
| 43 | William Harold Castle | 3 | Son | — | Kentucky |
| 44 | Zella Castle | 53 | Mother | — | Kentucky |
| 45 | Curtis Salyer | 25 | Head | Laborer | Kentucky |
| 46 | Berniece Salyer | 23 | Wife | Laborer | Kentucky |
| 47 | Bobby Joe Salyer | 2 | Son | — | Kentucky |
| 48 | John Stapleton | 48 | Head | Clerk | Kentucky |
| 49 | Chloe Stapleton | 50 | Wife | — | Kentucky |
| 50 | Warden Al Stapleton | 18 | Son | New Worker | Kentucky |
| 51 | Gordon Stapleton | 15 | Son | — | Kentucky |
| 52 | Robert Stapleton | 80 | Father | — | Kentucky |
| 53 | Craig Tackitt | 55 | Head | — | Kentucky |
| 54 | Etta Tackitt | 51 | Wife | — | Kentucky |
| 55 | Glenn Cooper | 22 | Head | New Worker | Kentucky |
| 56 | Jennie Cooper | 20 | Wife | — | Kentucky |
| 57 | Phillip M. Cooper | 2 | Son | — | Kentucky |
| 58 | Delores Rae Cooper | 5 | Daughter | — | Kentucky |
| 59 | Claudia Sue Cooper | 0 | Daughter | — | Kentucky |
| 60 | James G. Hill | 21 | Head | Body Repairman | Kentucky |
| 61 | Nancy Hill | 21 | Wife | — | Kentucky |
| 62 | Sam Bayes | 76 | Head | — | Virginia |
| 63 | Martha Bayes | 80 | Wife | — | Kentucky |
| 64 | Sam Calvin | 62 | Head | — | Kentucky |
| 65 | Mary Lou Calvin | 55 | Wife | — | Kentucky |
| 66 | Leonard Al Calvin | 22 | Son | Miner | W. Virginia |
| 67 | Laura B. Pelphrey | 64 | Head | — | Kentucky |
| 68 | Lucy Spears | 59 | Head | Seamstress | Kentucky |
| 69 | George Spears | 34 | Son | Attendant | Kentucky |
| 70 | Garnett Spears | 14 | Daughter | — | Kentucky |
| 71 | John M. Blair THIS PERSON | 68 | Head | — | Kentucky |
| 72 | Neva Blair | 38 | Wife | — | Kentucky |
| 73 | Ruby Spradlin | 10 | Daughter | — | Kentucky |
| 74 | Dewey Selvage | 40 | Head | Laborer | Kentucky |
| 75 | Bertha Selvage | 37 | Wife | — | Kentucky |
| 76 | Reba Selvage | 16 | Daughter | — | Kentucky |
| 77 | Archie Selvage | 13 | Son | — | Kentucky |
| 78 | Lasera Selvage | 10 | Daughter | — | Kentucky |
| 79 | Jesse Jayne | 37 | Head | Miner | Kentucky |
| 80 | Edna Jayne | 36 | Wife | — | 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)