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Mary Blackburn — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Johnson-County, Tennessee
Our Model Tree links this Mary Blackburn across the 1930 and 1940 US Censuses in Johnson-County, Tennessee (XGBoost, ~Confirmed) — first a spouse (b.~1892), then head of a 6-person household.
Age 48
b. ~1892
Female
Spouse
Born: Tennessee
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Johnson-County, Tennessee |
| Surname | Blackburn |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 48 |
| Marital Status | Married |
| Birthplace | Tennessee |
| 1935 Residence (City) | Civil District 1 |
| 1935 Residence (County) | Johnson |
| Additional Details | |
| Highest Grade | No 4 |
| 1935 Residence | Same house |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
| Township / Ward | Civil District 1 |
| Est. Birth Year | ~1892 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Carl Blackburn | Son | — | 21 | ~1919 |
| Brown Blackburn | Head | — | 51 | ~1889 |
| Dora Blackburn | Daughter | — | 15 | ~1925 |
| W Blackburn | Son | — | 18 | ~1922 |
| Christine Blackburn | Daughter | — | 13 | ~1927 |
| Mary Blackburn | Spouse | — | 48 | ~1892 |
Census Appearances
1930
Johnson, Tennessee
Other, age 38
Johnson, Tennessee · implied b. ~1892 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blackburn |
| Given Name | Mary |
| Relationship to Head | Wife H |
| Sex | F |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Tennessee |
| Age at First Marriage | 17 |
| Father's Birthplace | Tennessee |
| Mother's Birthplace | Tennessee |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
1940
Johnson-County, Tennessee
Spouse, age 48
Johnson-County, Tennessee · implied b. ~1892 — 6 household members
| Surname | Blackburn |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 48 |
| Marital Status | Married |
| Birthplace | Tennessee |
| 1935 Residence (City) | Civil District 1 |
| 1935 Residence (County) | Johnson |
| Highest Grade | No 4 |
| 1935 Residence | Same house |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
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.
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This person
Anchor record
Mary Blackburn
Spouse · 1940 · age 48 · b. ~1892 · Tennessee
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Johnson-County, Tennessee
Open full size
1940 US Federal Census — Johnson-County, Tennessee
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03908-00756)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Belle Murray | 52 | Sister | — | Tennessee |
| 42 | Robert Murray | 27 | Nephew | Laborer | Tennessee |
| 43 | Clyde Hodge | 9 | Nephew | — | Tennessee |
| 44 | Richard Fletcher | 29 | Head | Farmer | Tennessee |
| 45 | Gladys Fletcher | 31 | Wife | — | Tennessee |
| 46 | P. E. Jr. Fletcher | 6 | Son | — | Tennessee |
| 47 | Irene Fletcher | 5 | Daughter | — | Tennessee |
| 48 | Ruby Mae Fletcher | 3 | Daughter | — | Tennessee |
| 49 | Ralph Fletcher | 1 | Son | — | Tennessee |
| 50 | Noah Fletcher | 43 | Head | Laborer | Tennessee |
| 51 | Effie D. Fletcher | 33 | Wife | — | Tennessee |
| 52 | Leona Fletcher | 14 | Daughter | — | Tennessee |
| 53 | Spencer Fletcher | 12 | Son | — | Tennessee |
| 54 | Millard Fletcher | 11 | Son | — | Tennessee |
| 55 | Waneta Fletcher | 9 | Daughter | — | Tennessee |
| 56 | Dennis Fletcher | 5 | Son | — | Tennessee |
| 57 | Hazel Fletcher | 3 | Daughter | — | Tennessee |
| 58 | Doris Fletcher | 1 | Daughter | — | Tennessee |
| 59 | Dewey Fletcher | 28 | Head | Farmer | Tennessee |
| 60 | Lottie Mae Fletcher | 23 | Wife | — | Tennessee |
| 61 | Edward Fletcher | 2 | Son | — | Tennessee |
| 62 | Alice Fletcher | 75 | Mother | — | Tennessee |
| 63 | Robert Campbell | 40 | Head | Farmer | Tennessee |
| 64 | Nancy Campbell | 60 | Wife | — | Tennessee |
| 65 | Ron Fritts | 24 | Head | Laborer | Tennessee |
| 66 | Bertha Fritts | 20 | Wife | — | Tennessee |
| 67 | Vaught Grindstaff | 56 | Head | Farmer | Tennessee |
| 68 | Betty Grindstaff | 26 | Wife | — | Virginia |
| 69 | Calvin Dugger | 52 | Head | Laborer | North Carolina |
| 70 | Adie Dugger | 47 | Wife | — | Tennessee |
| 71 | Syria Dugger | 14 | Daughter | — | Tennessee |
| 72 | Christine Dugger | 13 | Daughter | — | Tennessee |
| 73 | Mary Dugger | 10 | Daughter | — | Tennessee |
| 74 | Rena Dugger | 8 | Daughter | — | Tennessee |
| 75 | Brown Blackburn | 51 | Head | Farmer | Tennessee |
| 76 | Mary Blackburn THIS PERSON | 48 | Wife | — | Tennessee |
| 77 | Carl Blackburn | 21 | Son | Farmer | Tennessee |
| 78 | W. A. Blackburn | 18 | Son | Laborer | Tennessee |
| 79 | Dora Blackburn | 15 | Daughter | — | Tennessee |
| 80 | Christine Blackburn | 13 | Daughter | — | Tennessee |
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)