MJ
Mary Johnson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Nelson-County, Kentucky
Our Model Tree links this Mary Johnson across the 1920, 1930 and 1940 US Censuses in Nelson-County, Kentucky (XGBoost, ~Confirmed), with identified parents Harrison & Annie — first a daughter (b.~1915), then head of a 8-person household.
Age 25
b. ~1915
Female
Daughter
Born: Kentucky
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Nelson-County, Kentucky |
| Surname | Johnson |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Kentucky |
| 1935 Residence (City) | Bardstown |
| 1935 Residence (County) | Nelson |
| Additional Details | |
| Occupation | Cook |
| Industry | Private home |
| Class of Worker | PW |
| Hours Worked | 54 |
| Income (1939) | 520 |
| Highest Grade | No 8 |
| 1935 Residence | Same house |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
| Occupation | Cook |
| Township / Ward | Bardstown |
| 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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Amelda Johnson | Daughter | — | 15 | ~1925 |
| Margaret Johnson | Daughter | — | 23 | ~1917 |
| Mamie Johnson | Daughter | — | 32 | ~1908 |
| Mary Johnson | Daughter | — | 25 | ~1915 |
| Susie Johnson | Head | — | 49 | ~1891 |
| Will Johnson | Son | — | 24 | ~1916 |
| L Johnson | Son | — | 14 | ~1926 |
| Bessie Johnson | Son | — | 23 | ~1917 |
Census Appearances
1920
Nelson, Kentucky
Daughter, age 4
Nelson, Kentucky · implied b. ~1916 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Kentucky |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1930
Nelson, Kentucky
Other, age 15
Nelson, Kentucky · implied b. ~1915 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Mary |
| Sex | F |
| Color / Race | Black |
| 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
Nelson-County, Kentucky
Daughter, age 25
Nelson-County, Kentucky · implied b. ~1915 — 8 household members
| Surname | Johnson |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Kentucky |
| 1935 Residence (City) | Bardstown |
| 1935 Residence (County) | Nelson |
| Occupation | Cook |
| Industry | Private home |
| Class of Worker | PW |
| Hours Worked | 54 |
| Income (1939) | 520 |
| 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 Johnson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Harrison Johnson (~0.92 confidence) and mother Annie Johnson (~0.92 confidence) and mother Susie Johnson (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Harrison Johnson
b. ~1896
Source father
● Household
· direct · ~0.92
Mother
Annie Johnson
b. ~1893
Source mother
● Household
· direct · ~0.92
Mother
Susie Johnson
b. ~1891
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Johnson
Daughter · 1940 · age 25 · b. ~1915 · Kentucky
★ You are viewing this record
Sibling
Amelda Johnson
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Johnson
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bessie Johnson
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
L Johnson
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Will Johnson
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mamie Johnson
Sibling · 1940 · age 32
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 — Nelson-County, Kentucky
Open full size
1940 US Federal Census — Nelson-County, Kentucky
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01345-00168)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Betty Abell | 4 | Daughter | — | Kentucky |
| 2 | Carol Abell | 3 | Daughter | — | Kentucky |
| 3 | John Williams | 54 | Head | Laborer | Kentucky |
| 4 | Carrie Williams | 52 | Wife | Laundress | Kentucky |
| 5 | Sidney Porter | 21 | Nephew | Porter | Kentucky |
| 6 | Jeanette Porter | 19 | Niece | Nurse | Kentucky |
| 7 | James B. Fortune | 46 | Head | Truck Driver | Georgia |
| 8 | James Jr. Fortune | 19 | Son | Truck Driver | Kentucky |
| 9 | Mary Lee Linton | 23 | Head | Cook | Kentucky |
| 10 | Willet J. Linton | 6 | Son | — | Kentucky |
| 11 | George Racer | 49 | Head | — | Kentucky |
| 12 | Joe Ed Owens | 34 | Partner | Laborer | Kentucky |
| 13 | Susie Johnson | 49 | Head | Maid | Kentucky |
| 14 | Mamie Johnson | 32 | Daughter | Cook | Kentucky |
| 15 | Margaret Johnson | 23 | Daughter | — | Kentucky |
| 16 | Will Ed Johnson | 24 | Son | Truck Driver | Kentucky |
| 17 | Mary Johnson THIS PERSON | 25 | Daughter | Cook | Kentucky |
| 18 | Bessie Johnson | 23 | Son | Truck Driver | Kentucky |
| 19 | Amelda Johnson | 15 | Daughter | — | Kentucky |
| 20 | L. F. Johnson | 14 | Son | — | Kentucky |
| 21 | Mary Linton | 56 | Head | — | Kentucky |
| 22 | Gertrude Hayden | 26 | Daughter | — | Kentucky |
| 23 | James Hayden | 20 | Son | Porter | Kentucky |
| 24 | John T. Hays | 32 | Head | Janitor | Kentucky |
| 25 | Mamie Hays | 20 | Wife | Cook | Kentucky |
| 26 | Amelia Lee Hays | 20 | Cousin | Cook | Kentucky |
| 27 | Charles Linton | 39 | Head | Laborer | Kentucky |
| 28 | Emily Linton | 38 | Wife | — | Kentucky |
| 29 | James Linton | 21 | Son | Laborer | Kentucky |
| 30 | Charles P. Linton | 19 | Son | House Boy | Kentucky |
| 31 | L. T. Linton | 10 | Son | — | Kentucky |
| 32 | Dorothy Linton | 7 | Daughter | — | Kentucky |
| 33 | Barney Linton | 6 | Son | — | Kentucky |
| 34 | Robert Borders | 52 | Lodger | Helper | Kentucky |
| 35 | Edward Maddox | 37 | Lodger | Laborer | Kentucky |
| 36 | Thomas Green | 37 | Head | Porter | Kentucky |
| 37 | Minnie Green | 32 | Sister | Maid | Kentucky |
| 38 | J. Leon Ballard | 38 | Head | Salesman | Kentucky |
| 39 | Louise Ballard | 37 | Wife | — | Kentucky |
| 40 | Edna Mae Ballard | 14 | Daughter | — | Kentucky |
Pedigree Summary
Mary + 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)