MD
Mary Decker — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Columbia-County, New York
Our Model Tree links this Mary Decker across the 1930 and 1940 US Censuses in Columbia-County, New York (XGBoost, ~Confirmed) — first a spouse (b.~1903), then head of a 11-person household.
Age 37
b. ~1903
Female
Spouse
Born: New York
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Columbia-County, New York |
| Surname | Decker |
| Given Name | Mary A. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | New York |
| 1935 Residence (City) | Hillsdale Town |
| 1935 Residence (County) | Columbia |
| Additional Details | |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
| Township / Ward | Hillsdale Town |
| Est. Birth Year | ~1903 |
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.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Robert Decker | Son | — | 10 | ~1930 |
| Oswald Decker | Head | — | 40 | ~1900 |
| Mary Decker | Spouse | — | 37 | ~1903 |
| Jean Decker | Daughter | — | 2 | ~1938 |
| John Decker | Son | — | 4 | ~1936 |
| Oswald Decker | Son | — | 14 | ~1926 |
| Margaret Decker | Daughter | — | 16 | ~1924 |
| Helen Decker | Daughter | — | 12 | ~1928 |
| Mary Decker | Daughter | — | 1 | ~1939 |
| Harold Decker | Son | — | 8 | ~1932 |
| Alma Decker | Daughter | — | 6 | ~1934 |
Census Appearances
1930
Columbia, New …
Spouse, age 27
Columbia, New York · implied b. ~1903 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Decker |
| Given Name | Mary A |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | New York |
| Age at First Marriage | 18 |
| Father's Birthplace | New York |
| Mother's Birthplace | Canada |
| Can Read/Write | Yes |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1940
Columbia-County, New …
Spouse, age 37
Columbia-County, New York · implied b. ~1903 — 11 household members
| Surname | Decker |
| Given Name | Mary A. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | New York |
| 1935 Residence (City) | Hillsdale Town |
| 1935 Residence (County) | Columbia |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
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.
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This person
Anchor record
Mary Decker
Spouse · 1940 · age 37 · b. ~1903 · New York
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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 — Columbia-County, New York
Open full size
1940 US Federal Census — Columbia-County, New York
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02518-00566)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Clement Rockhill | 35 | Head | Draughtsman | New York |
| 2 | Alice Rockhill | 34 | Wife | — | Canada French |
| 3 | Mabel Rockhill | 9 | Daughter | — | New York |
| 4 | Carol Rockhill | 4 | Son | — | New York |
| 5 | Helene V. Gold | 33 | Head | — | New York |
| 6 | Joseph H. Gold | 13 | Son | — | North Carolina |
| 7 | Geraldine Gold | 11 | Daughter | — | North Carolina |
| 8 | Helene V. Gold | 9 | Daughter | — | North Carolina |
| 9 | John W. Gold | 6 | Son | — | North Carolina |
| 10 | Lee Wilkinson | 37 | Hired man | — | North Carolina |
| 11 | George Atwood | 28 | Head | Farm Manager | Connecticut |
| 12 | Caroline Atwood | 28 | Wife | — | New York |
| 13 | Harold Atwood | 2 | Son | — | New York |
| 14 | Nora Borthwick | 47 | Head | — | Scotland |
| 15 | Sarah Cox | 35 | Maid | Housemaid | Scotland |
| 16 | Clarence Klans | 28 | Head | Manager | New York |
| 17 | Catherine Klans | 27 | Wife | Housekeeper | New York |
| 18 | Charles Ostrander | 40 | Head | Farm Hand | Massachusetts |
| 19 | Joseph Newell | 54 | Boarder | Farm Hand | Vermont |
| 20 | Stanley Coons | 15 | Boarder | Farm Hand | New York |
| 21 | Otto Hammerschmidt | 53 | Head | Waiter | Germany |
| 22 | Helen Hammerschmidt | 52 | Wife | — | New York |
| 23 | Harry Faulkner | 17 | Hired boy | Hired Boy | New York |
| 24 | Harold Shultis | 45 | Head | Manager | New York |
| 25 | John L. Burns | 42 | Boarder | Clerk | New York |
| 26 | Oswald B. Decker | 40 | Head | Molder | Same place |
| 27 | Mary A. Decker THIS PERSON | 37 | Wife | — | New York |
| 28 | Margaret Decker | 16 | Daughter | — | Same place |
| 29 | Oswald Decker | 14 | Son | — | Same place |
| 30 | Helen Decker | 12 | Daughter | — | Same place |
| 31 | Robert Decker | 10 | Son | — | Same place |
| 32 | Harold Decker | 8 | Son | — | Same place |
| 33 | Alma Decker | 6 | Daughter | — | Same place |
| 34 | John Decker | 4 | Son | — | Same place |
| 35 | Jean Decker | 2 | Daughter | — | Same place |
| 36 | Mary Decker | 1 | Daughter | — | Same place |
| 37 | James Bruschi | 58 | Head | Gardner | Italy |
| 38 | Margaret Bruschi | 46 | Wife | — | Hungary |
| 39 | Frank Mercer | 75 | Head | — | New York |
| 40 | Mary Mercer | 74 | Wife | — | Same place |
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)