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Mary Blackburn — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Jefferson-County, Kentucky
Our Model Tree links this Mary Blackburn across the 1930 and 1940 US Censuses in Jefferson-County, Kentucky (XGBoost, ~Confirmed) — first a spouse (b.~1900), then head of a 7-person household.
Age 40
b. ~1900
Female
Spouse
Born: Kentucky
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Jefferson-County, Kentucky |
| Surname | Blackburn |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Kentucky |
| 1935 Residence (City) | Louisville City |
| 1935 Residence (County) | Jefferson |
| Additional Details | |
| Occupation | Maid |
| Industry | Hospital |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 468 |
| Highest Grade | Hs 4-3 |
| 1935 Residence | Same House |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
| Occupation | Maid |
| Township / Ward | Louisville City |
| Est. Birth Year | ~1900 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Harold Blackburn | Son | — | 8 | ~1932 |
| Vivian Blackburn | Daughter | — | 17 | ~1923 |
| James Blackburn | Son | — | 14 | ~1926 |
| Smith Blackburn | Son | — | 19 | ~1921 |
| Mary Blackburn | Spouse | — | 40 | ~1900 |
| Antonia Blackburn | Head | — | 40 | ~1900 |
| Jr Blackburn | Son | — | 10 | ~1930 |
Census Appearances
1930
Jefferson, Kentucky
Spouse, age 33
Jefferson, Kentucky · implied b. ~1897 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blackburn |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 33 |
| Marital Status | Married |
| Birthplace | Kentucky |
| Age at First Marriage | 20 |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Can Read/Write | Yes |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1940
Jefferson-County, Kentucky
Spouse, age 40
Jefferson-County, Kentucky · implied b. ~1900 — 7 household members
| Surname | Blackburn |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Kentucky |
| 1935 Residence (City) | Louisville City |
| 1935 Residence (County) | Jefferson |
| Occupation | Maid |
| Industry | Hospital |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 468 |
| Highest Grade | Hs 4-3 |
| 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
Spouse · 1940 · age 40 · b. ~1900 · 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 — Jefferson-County, Kentucky
Open full size
1940 US Federal Census — Jefferson-County, Kentucky
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01373-00437)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Mary Robinson | 13 | Daughter | — | Kentucky |
| 42 | William Robinson | 12 | Son | — | Kentucky |
| 43 | Haynes Robinson | 9 | Son | — | Kentucky |
| 44 | Igorne Robinson | 8 | Daughter | — | Kentucky |
| 45 | Bettie Robinson | 6 | Daughter | — | Kentucky |
| 46 | Bennie Robinson | 4 | Son | — | Kentucky |
| 47 | Rodrick Clay | 41 | Head | Mover And Packer | Kentucky |
| 48 | Bobbie Clay | 31 | Wife | Laundress | Tennessee |
| 49 | Eva Parson | 36 | Head | Servant | Kentucky |
| 50 | Sam Jenkins | 38 | Head | Molder | Alabama |
| 51 | Fanny Jenkins | 30 | Wife | — | Georgia |
| 52 | Bedford Murphy | 53 | Head | Hod Carrier | Tennessee |
| 53 | Vashti Murphy | 51 | Wife | Servant | Tennessee |
| 54 | Antonia Blackburn | 40 | Head | Fireman | Kentucky |
| 55 | Mary Blackburn THIS PERSON | 40 | Wife | Maid | Kentucky |
| 56 | Smith Blackburn | 19 | Son | — | Kentucky |
| 57 | Vivian Blackburn | 17 | Daughter | — | Kentucky |
| 58 | James Blackburn | 14 | Son | — | Kentucky |
| 59 | Jr. Antonia Blackburn | 10 | Son | — | Kentucky |
| 60 | Harold Blackburn | 8 | Son | — | Kentucky |
| 61 | Napoleon Mccutchen | 42 | Head | Porter | Kentucky |
| 62 | Henrietta Mccutchen | 37 | Wife | Cook | Kentucky |
| 63 | James Beard | 53 | Head | Shoe Repairer | Kentucky |
| 64 | Marie Beard | 45 | Wife | Helper In Shoe Shop | Kentucky |
| 65 | Will Davis | 78 | Father | — | Kentucky |
| 66 | Emma Nellem | 51 | Head | Proprietor Of Restaurant | Kentucky |
| 67 | Mary C Nellem | 19 | Daughter | Waitress | Kentucky |
| 68 | Andrew E Nellem | 15 | Son | — | Kentucky |
| 69 | Laura Board | 56 | Sister | — | Kentucky |
| 70 | Mary Williams | 53 | Head | Servant | Tennessee |
| 71 | Laura Williams | 30 | Lodger | Day Maid | Kentucky |
| 72 | Mary J Graham | 40 | Cousin | Maid | Tennessee |
| 73 | Louise Rogers | 45 | Lodger | Servant | Kentucky |
| 74 | Nellie Ellis | 49 | Head | Waitress | Kentucky |
| 75 | Chauncey Ellis | 27 | Son | Porter | Kentucky |
| 76 | Willie M Ellis | 28 | Daughter-in-law | — | Alabama |
| 77 | Geoffrey Ellis | 0 | Grandson | — | Kentucky |
| 78 | Creamery Clark | 19 | Daughter | — | Kentucky |
| 79 | John C Clark | 2 | Grandson | — | Kentucky |
| 80 | Bessie Ellis | 39 | Sister-in-law | — | 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)