MD
Mary Decker — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Jackson-County, Missouri
Our Model Tree links this Mary Decker across the 1930 and 1940 US Censuses in Jackson-County, Missouri (XGBoost, ~Confirmed) — first a daughter (b.~1926), then head of a 9-person household.
Age 14
b. ~1926
Female
Daughter
Born: Missouri
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Jackson-County, Missouri |
| Surname | Decker |
| Given Name | Mary E. |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Missouri |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Texas County |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | No 5 |
| 1935 Residence | Missouri |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
| Township / Ward | Prairie Twp |
| Est. Birth Year | ~1926 |
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 |
|---|---|---|---|---|
| Percy Decker | Son | — | 18 | ~1922 |
| Alfred Decker | Head | — | 54 | ~1886 |
| Betty Decker | Daughter | — | 11 | ~1929 |
| Clarence Decker | Son | — | 20 | ~1920 |
| Mary Decker | Daughter | — | 14 | ~1926 |
| Ira Decker | Son | — | 22 | ~1918 |
| Theodore Thompson | Other | — | 50 | ~1890 |
| Leonard Decker | Son | — | 16 | ~1924 |
| Iva Decker | Spouse | — | 53 | ~1887 |
Census Appearances
1930
Jackson, Missouri
Daughter, age 4
Jackson, Missouri · implied b. ~1926 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Decker |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Missouri |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Missouri |
| Occupation | none |
| Can Read/Write | No |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1940
Jackson-County, Missouri
Daughter, age 14
Jackson-County, Missouri · implied b. ~1926 — 9 household members
| Surname | Decker |
| Given Name | Mary E. |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Missouri |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Texas County |
| Income (1939) | 0 |
| Highest Grade | No 5 |
| 1935 Residence | Missouri |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
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 14 · b. ~1926 · Missouri
★ You are viewing this record
Sibling
Ira Decker
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Betty Decker
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Percy Decker
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Leonard Decker
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Clarence Decker
Sibling · 1940 · age 20
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 — Jackson-County, Missouri
Open full size
1940 US Federal Census — Jackson-County, Missouri
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02116-00287)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Agnes E. Hollyday | 50 | Head | — | Missouri |
| 2 | Carroll P. Hollyday | 54 | brother | Carpenter | Kansas |
| 3 | Margaret R. Hollyday | 46 | sister | — | Missouri |
| 4 | Anton C. Hartman | 52 | Head | Farm Operator | Missouri |
| 5 | Christena Hartman | 47 | wife | — | Missouri |
| 6 | John R. Birdsong | 55 | Head | Stone Mason | Missouri |
| 7 | Susie F. Birdsong | 44 | wife | — | Missouri |
| 8 | Dan W. Birdsong | 18 | son | New Worker | Missouri |
| 9 | Jimmie R. Birdsong | 18 | son | New Worker | Missouri |
| 10 | Joe E. Birdsong | 14 | son | — | Missouri |
| 11 | Alfred Decker | 54 | Head | Farm Laborer | Missouri |
| 12 | Iva M. Decker | 53 | wife | — | Missouri |
| 13 | Ira W. Decker | 22 | son | Laborer | Missouri |
| 14 | Clarence R. Decker | 20 | son | Farm Laborer | Missouri |
| 15 | Percy W. Decker | 18 | son | Laborer | Missouri |
| 16 | Leonard A. Decker | 16 | son | New Worker | Missouri |
| 17 | Mary E. Decker THIS PERSON | 14 | daughter | — | Missouri |
| 18 | Betty M. Decker | 11 | daughter | — | Missouri |
| 19 | Theodore Thompson | 50 | brother-in-law | Farm Laborer | Missouri |
| 20 | Bernard F. Hollyday | 57 | Head | Farm Operator | Kansas |
| 21 | Dora W. Hollyday | 45 | wife | — | Missouri |
| 22 | Bernard P. Hollyday | 13 | son | — | Missouri |
| 23 | Virgil Decker | 31 | laborer | Farm Labor | Missouri |
| 24 | James H. Clarkson | 47 | Head | Laborer | Missouri |
| 25 | Nellie N. Clarkson | 37 | wife | — | Missouri |
| 26 | Annie E. Clarkson | 13 | daughter | — | Missouri |
| 27 | Charles A. Clarkson | 11 | son | — | Missouri |
| 28 | Dorothy M. Clarkson | 8 | daughter | — | Missouri |
| 29 | Opal C. Clarkson | 4 | daughter | — | Missouri |
| 30 | Emma J. Clarkson | 2 | daughter | — | Missouri |
| 31 | Annie L. Clarkson | 63 | sister | — | Missouri |
| 32 | Charles C. Jones | 40 | Head | Laborer | Tennessee |
| 33 | Lu Vernie Jones | 46 | wife | — | Missouri |
| 34 | Elma F. Jones | 15 | daughter | — | Missouri |
| 35 | Mary M. Jones | 12 | daughter | — | Missouri |
| 36 | Robert L. Jones | 9 | son | — | Missouri |
| 37 | Walter F. Drake | 33 | Head | Farm Laborer | Missouri |
| 38 | Pearl E. Drake | 26 | wife | — | Missouri |
| 39 | W. Edward Drake | 4 | son | — | Missouri |
| 40 | Roy K. Drake | 1 | son | — | Missouri |
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)