MD
Mary Decker — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Grayson-County, Kentucky
Our Model Tree links this Mary Decker across the 1930 and 1940 US Censuses in Grayson-County, Kentucky (XGBoost, ~Confirmed) — first a daughter (b.~1927), then head of a 9-person household.
Age 13
b. ~1927
Female
Daughter
Born: Kentucky
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Grayson-County, Kentucky |
| Surname | Decker |
| Given Name | Mary S. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Kentucky |
| 1935 Residence (City) | Mag. Dist. 3 |
| 1935 Residence (County) | Grayson |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | No 5 |
| 1935 Residence | Same place |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
| Township / Ward | Mag Dist 3 |
| Est. Birth Year | ~1927 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Decker | Daughter | — | 13 | ~1927 |
| Sam Decker | Son | — | 15 | ~1925 |
| Evart Decker | Son | — | 5 | ~1935 |
| Rollie Decker | Spouse | — | 42 | ~1898 |
| Otha Decker | Son | — | 11 | ~1929 |
| Ruby Decker | Daughter | — | 9 | ~1931 |
| Birch Decker | Son | — | 9 | ~1931 |
| Herman Decker | Son | — | 2 | ~1938 |
| Lester Decker | Head | — | 48 | ~1892 |
Census Appearances
1930
Grayson, Kentucky
Daughter, age 3
Grayson, Kentucky · implied b. ~1927 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Decker |
| Given Name | Mary L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Kentucky |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1940
Grayson-County, Kentucky
Daughter, age 13
Grayson-County, Kentucky · implied b. ~1927 — 9 household members
| Surname | Decker |
| Given Name | Mary S. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Kentucky |
| 1935 Residence (City) | Mag. Dist. 3 |
| 1935 Residence (County) | Grayson |
| Income (1939) | 0 |
| Highest Grade | No 5 |
| 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 13 · b. ~1927 · Kentucky
★ You are viewing this record
Sibling
Herman Decker
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ruby Decker
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Birch Decker
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Sam Decker
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Otha Decker
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Evart Decker
Sibling · 1940 · age 5
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 — Grayson-County, Kentucky
Open full size
1940 US Federal Census — Grayson-County, Kentucky
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01310-00296)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Celena Tilford | 54 | Mother | — | Kentucky |
| 2 | Smith Quetermous | 73 | Head | — | Kentucky |
| 3 | Laura Quetermous | 62 | Wife | — | Kentucky |
| 4 | Riley Stone | 58 | Head | Farm Laborer | Kentucky |
| 5 | Josephine Stone | 57 | Wife | — | Kentucky |
| 6 | Nancy J. Stone | 16 | Daughter | — | Kentucky |
| 7 | Willis Green | 70 | Head | Head Of House Furniture & Mill | Kentucky |
| 8 | Preston Green | 62 | Brother | Farm Manager | Kentucky |
| 9 | Jennie E. Green | 60 | Sister | — | Kentucky |
| 10 | Robert Green | 58 | Brother | Farm Manager | Kentucky |
| 11 | Tom Davis | 23 | Servant | House Servant | Kentucky |
| 12 | Delilah Davis | 26 | Servant | House Maid | Kentucky |
| 13 | Ira Garver | 45 | Head | Store Manager | Kentucky |
| 14 | Ree Garver | 40 | Wife | — | Kentucky |
| 15 | Carl S. Garver | 14 | Son | — | Kentucky |
| 16 | Carl Shrewsbury | 46 | Head | Mill Operator | Kentucky |
| 17 | Eva Shrewsbury | 33 | Wife | — | Kentucky |
| 18 | Wayne Irene Shrewsbury | 14 | Daughter | — | Kentucky |
| 19 | Samuel E. Stanley | 73 | Head | Medical Doctor | Kentucky |
| 20 | Alice Stanley | 44 | Wife | — | Kentucky |
| 21 | Lester Decker | 48 | Head | Farmer | Kentucky |
| 22 | Rollie Decker | 42 | Wife | — | Kentucky |
| 23 | Sam H. Decker | 15 | Son | Farm Laborer | Kentucky |
| 24 | Mary S. Decker THIS PERSON | 13 | Daughter | — | Kentucky |
| 25 | Otha R. Decker | 11 | Son | — | Kentucky |
| 26 | Ruby S. Decker | 9 | Daughter | — | Kentucky |
| 27 | Birch F. Decker | 9 | Son | — | Kentucky |
| 28 | Evart P. Decker | 5 | Son | — | Kentucky |
| 29 | Herman C. Decker | 2 | Son | — | Kentucky |
| 30 | Harkin Porter | 28 | Head | Farmer | Kentucky |
| 31 | Kate Porter | 24 | Wife | — | Kentucky |
| 32 | Harry Porter | 34 | Son | Farmer | Kentucky |
| 33 | Betsy Porter | 32 | Daughter-in-law | — | Kentucky |
| 34 | Julia Geary | 30 | Cook | Cook | Kentucky |
| 35 | Yeoman Patterson | 44 | Hired hand | Farm Laborer | Kentucky |
| 36 | Barney Smith | 37 | Hired hand | Farm Laborer | Kentucky |
| 37 | Wang Willoughby | 40 | Head | Farm Laborer | Kentucky |
| 38 | Sylvia Willoughby | 22 | Wife | — | Kentucky |
| 39 | Charles R. Willoughby | 4 | Son | — | Kentucky |
| 40 | Mike D. Porter | 36 | Head | Farmer | 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)