MD
Mary Decker — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Union-County, Kentucky
Our Model Tree links this Mary Decker across the 1930 and 1940 US Censuses in Union-County, Kentucky (XGBoost, ~Confirmed) — first a daughter (b.~1920), then head of a 10-person household.
Age 20
b. ~1920
Female
Daughter
Born: Kentucky
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Union-County, Kentucky |
| Surname | Decker |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Kentucky |
| 1935 Residence (City) | Morganfield City |
| 1935 Residence (County) | Union |
| Additional Details | |
| Occupation | Child nurse |
| Industry | Private Family |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 104 |
| Highest Grade | Hs 1 |
| 1935 Residence | Same Place |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
| Occupation | Child Nurse |
| Township / Ward | Morganfield City |
| Est. Birth Year | ~1920 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| George Decker | Son | — | 16 | ~1924 |
| Calvin Decker | Son | — | 5 | ~1935 |
| Cornelius Decker | Son | — | 8 | ~1932 |
| Robert Decker | Son | — | 23 | ~1917 |
| Emma Decker | Daughter | — | 6 | ~1934 |
| Jimmie Decker | Son | — | 3 | ~1937 |
| Mary Decker | Spouse | — | 43 | ~1897 |
| Robert Decker | Head | — | 48 | ~1892 |
| Mary Decker | Daughter | — | 20 | ~1920 |
| James Decker | Son | — | 17 | ~1923 |
Census Appearances
1930
Union, Kentucky
Daughter, age 9
Union, Kentucky · implied b. ~1921 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Decker |
| Given Name | Mary G. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Kentucky |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1940
Union-County, Kentucky
Daughter, age 20
Union-County, Kentucky · implied b. ~1920 — 10 household members
| Surname | Decker |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Kentucky |
| 1935 Residence (City) | Morganfield City |
| 1935 Residence (County) | Union |
| Occupation | Child nurse |
| Industry | Private Family |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 104 |
| Highest Grade | Hs 1 |
| 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 Decker across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Decker
Daughter · 1940 · age 20 · b. ~1920 · Kentucky
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Sibling
Calvin Decker
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jimmie Decker
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Decker
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
George Decker
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Emma Decker
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Decker
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Cornelius Decker
Sibling · 1940 · age 8
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 — Union-County, Kentucky
Open full size
1940 US Federal Census — Union-County, Kentucky
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01359-00223)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mary Everhart | 57 | Head | Laborer | Kentucky |
| 2 | John Brown | 28 | Son | — | Kentucky |
| 3 | Eddie Harris | 56 | Brother | Laborer | Kentucky |
| 4 | Sip Cattlet | 71 | Head | Laborer | Kentucky |
| 5 | Allie Cattlet | 42 | Wife | — | Kentucky |
| 6 | Chapman | None | — | — | — |
| 7 | Tom Wilson | 43 | Head | Truck Driver | Kentucky |
| 8 | Beatrice Barby | 32 | Lodger | — | Kentucky |
| 9 | John Henry Stone | 38 | Head | Laborer | Kentucky |
| 10 | Maud Saucer | 42 | Lodger | — | Kentucky |
| 11 | George Polley | 40 | Head | House Boy | Illinois |
| 12 | Viola Polley | 32 | Wife | — | Alabama |
| 13 | George Nathan Polley | 1 | Son | — | Kentucky |
| 14 | George Wakefield | 51 | Head | School Teacher | Kentucky |
| 15 | Josephine Wakefield | 35 | Wife | — | Kentucky |
| 16 | Richard Moore | 40 | Head | Laborer | Kentucky |
| 17 | Mary E. Moore | 34 | Wife | — | Kentucky |
| 18 | Eugene Moore | 21 | Son | Mud Worker | Kentucky |
| 19 | Grace Moore | 7 | Daughter | — | Kentucky |
| 20 | Frederick Moore | 3 | Son | — | Kentucky |
| 21 | James Moore | 3 | Son | — | Kentucky |
| 22 | George Moore | 42 | Brother | Mechanic | Kentucky |
| 23 | Clara Ash | 16 | Step daughter | — | Indiana |
| 24 | Mary Belle Ash | 13 | Step daughter | — | Indiana |
| 25 | Lizzie Stewart | 91 | Head | — | Kentucky |
| 26 | Robert H. Mcguire | 16 | Grandson | Mud Worker | Kentucky |
| 27 | Jennie Hogard | 65 | Head | — | Kentucky |
| 28 | Will Johnson | 42 | Lodger | Laborer | Kentucky |
| 29 | Courtney Oliver | 76 | Head | — | Kentucky |
| 30 | Roscoe Rawlins | 33 | Lodger | Waiter | Kentucky |
| 31 | Robert Decker | 48 | Head | Laborer | Kentucky |
| 32 | Mary Decker | 43 | Wife | — | Kentucky |
| 33 | Robert H. Decker | 23 | Son | Laborer | Kentucky |
| 34 | Mary E. Decker THIS PERSON | 20 | Daughter | Child Nurse | Kentucky |
| 35 | James W. Decker | 17 | Son | Mud Worker | Kentucky |
| 36 | George T. Decker | 16 | Son | Mud Worker | Kentucky |
| 37 | Cornelius Decker | 8 | Son | — | Kentucky |
| 38 | Emma Jean Decker | 6 | Daughter | — | Kentucky |
| 39 | Calvin Decker | 5 | Son | — | Kentucky |
| 40 | Jimmie Decker | 3 | Son | — | Kentucky |
Related Census Records
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)