MJ
Mary Johnson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Jefferson-County, Kentucky
Our Model Tree links this Mary Johnson across the 1920, 1930 and 1940 US Censuses in Jefferson-County, Kentucky (XGBoost, ~Confirmed) — first a spouse (b.~1889), then head of a 6-person household.
Age 51
b. ~1889
Female
Spouse
Born: Kentucky
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Jefferson-County, Kentucky |
| Surname | Johnson |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 51 |
| Marital Status | Married |
| Birthplace | Kentucky |
| 1935 Residence (City) | Louisville City |
| 1935 Residence (County) | Jefferson |
| Additional Details | |
| Occupation | no |
| Industry | no |
| Class of Worker | no |
| Hours Worked | 7 |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
| Township / Ward | Louisville City |
| Est. Birth Year | ~1889 |
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 |
|---|---|---|---|---|
| Elsa Price | Daughter | — | 38 | ~1902 |
| Ernest Johnson | Head | — | 50 | ~1890 |
| H Price | Other | — | 65 | ~1875 |
| Richard Johnson | Son | — | 22 | ~1918 |
| Ernest Johnson | Son | — | 25 | ~1915 |
| Mary Johnson | Spouse | — | 51 | ~1889 |
Census Appearances
1920
Jefferson, Kentucky
Spouse, age 31
Jefferson, Kentucky · implied b. ~1889 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Kentucky |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Occupation | Laborer |
| Industry | Tobacco House |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1930
Jefferson, Kentucky
Other, age 40
Jefferson, Kentucky · implied b. ~1890 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Mary |
| Relationship to Head | Lodger |
| Sex | F |
| Color / Race | Black |
| Age | 40 |
| Marital Status | Widowed |
| Birthplace | Kentucky |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Occupation | Laborer |
| Industry | Store house |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1940
Jefferson-County, Kentucky
Spouse, age 51
Jefferson-County, Kentucky · implied b. ~1889 — 6 household members
| Surname | Johnson |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 51 |
| Marital Status | Married |
| Birthplace | Kentucky |
| 1935 Residence (City) | Louisville City |
| 1935 Residence (County) | Jefferson |
| Occupation | no |
| Industry | no |
| Class of Worker | no |
| Hours Worked | 7 |
| Highest Grade | No 7 |
| 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 Mary Johnson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Johnson
Spouse · 1940 · age 51 · b. ~1889 · 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-t0627-01371-00217)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | D. R. Washman | 17 | Head | No | Kentucky |
| 42 | Shirley Holbart | 14 | Lodger | No | Kentucky |
| 43 | Pauline Carter | 31 | Head | No | Kentucky |
| 44 | Melvin Carter | 10 | Son | No | Kentucky |
| 45 | Marguerite Carter | 8 | Daughter | No | Kentucky |
| 46 | Norman Carter | 5 | Son | No | Kentucky |
| 47 | Jessie Spuer | 17 | Lodger | Maid | Kentucky |
| 48 | Eugene Spuer | 17 | Lodger | No | Kentucky |
| 49 | Alma Eddy | 45 | Lodger | No | Kentucky |
| 50 | Lora Sandi | 47 | Head | Laundress | Illinois |
| 51 | Joseph Hughes | 51 | Head | No | Michigan |
| 52 | Adha Hughes | 57 | Wife | Laundress | Kentucky |
| 53 | Marion Hughes | 24 | Son | Laborer | Kentucky |
| 54 | Robert Hughes | 24 | Son | Laborer | Kentucky |
| 55 | L. W. Jarrett | 33 | Head | Laborer | Kentucky |
| 56 | Mabel Jarrett | 36 | Wife | No | Kentucky |
| 57 | Maude Jarrett | 9 | Daughter | No | Kentucky |
| 58 | Alice Jarrett | 8 | Daughter | No | Kentucky |
| 59 | Rozella Jarrett | 4 | Daughter | No | Kentucky |
| 60 | Nannie Reed | 47 | Head | No | Kentucky |
| 61 | Charlie Reed | 26 | Son | No | Kentucky |
| 62 | Albert Reed | 23 | Son | No | Kentucky |
| 63 | Edward Reed | 21 | Son | Labour | Kentucky |
| 64 | Hill Washington | 24 | Head | No | Kentucky |
| 65 | Dempsey Starks | 31 | Head | Housework | Kentucky |
| 66 | Arthur Starks | 8 | Son | No | Kentucky |
| 67 | Charlie Word | 27 | Head | Janitor | Tennessee |
| 68 | Elizabeth Word | 35 | Wife | No | Kentucky |
| 69 | Mary Gay | 35 | Head | Labourer | Kentucky |
| 70 | Gilbert Gay | 15 | Son | No | Kentucky |
| 71 | Christina Packer | 30 | Head | Maid | Kentucky |
| 72 | Edward Packer | 8 | Son | No | Kentucky |
| 73 | Mary Packer | 13 | Daughter | No | Kentucky |
| 74 | Frances Packer | 10 | Daughter | No | Kentucky |
| 75 | Ernest Johnson | 50 | Head | Mechanic | Kentucky |
| 76 | Mary Johnson THIS PERSON | 51 | Wife | No | Kentucky |
| 77 | Ernest Jr. Johnson | 25 | Son | No | Kentucky |
| 78 | Richard Johnson | 22 | Son | Laborer | Kentucky |
| 79 | H. Deg (Mrs) Price | 65 | Mother | No | Kentucky |
| 80 | Elsa Line Price | 38 | Daughter | No | 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)