JD
John Decker — 1940 US Census Record
Model Tree available1940 United States Federal Census · York-County, Pennsylvania
Our Model Tree links this John Decker across the 1910, 1920, 1930 and 1940 US Censuses in York-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents Irwin & Ada — first a head (b.~1902), then head of a 5-person household.
Age 38
b. ~1902
Male
Head
Born: Pennsylvania
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | York-County, Pennsylvania |
| Surname | Decker |
| Given Name | John D. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Shrewsbury Twp |
| 1935 Residence (County) | York |
| Additional Details | |
| Occupation | Polisher |
| Industry | Furniture Factory |
| Class of Worker | PW |
| Hours Worked | 5 |
| Income (1939) | 760 |
| Highest Grade | H 8 |
| 1935 Residence | Same house |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Polisher |
| Township / Ward | Shrewsbury Twp |
| Est. Birth Year | ~1902 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Decker | Head | — | 38 | ~1902 |
| Ada Decker | Spouse | — | 37 | ~1903 |
| Carroll Decker | Son | — | 9 | ~1931 |
| Robert Decker | Son | — | 7 | ~1933 |
| Donald Decker | Son | — | 12 | ~1928 |
Census Appearances
1910
York, Pennsylvania
Son, age 8
York, Pennsylvania · implied b. ~1902 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Decker |
| Given Name | John S |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1920
York, Pennsylvania
Son, age 18
York, Pennsylvania · implied b. ~1902 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Decker |
| Given Name | John D. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | Machinist |
| Industry | Machine Shop |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
York, Pennsylvania
Head, age 28
York, Pennsylvania · implied b. ~1902 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Decker |
| Given Name | John D |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| Age at First Marriage | 24 |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | Rubber |
| Industry | Furniture factory |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | 19 |
| Home Value / Rent | R |
| Veteran | R |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
York-County, Pennsylvania
Head, age 38
York-County, Pennsylvania · implied b. ~1902 — 5 household members
| Surname | Decker |
| Given Name | John D. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Shrewsbury Twp |
| 1935 Residence (County) | York |
| Occupation | Polisher |
| Industry | Furniture Factory |
| Class of Worker | PW |
| Hours Worked | 5 |
| Income (1939) | 760 |
| Highest Grade | H 8 |
| 1935 Residence | Same house |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
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 John Decker across 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Irwin Decker (~0.92 confidence) and mother Ada Decker (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Irwin Decker
b. ~1877
Source father
● Household
· direct · ~0.92
Mother
Ada Decker
b. ~1879
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Decker
Head · 1940 · age 38 · b. ~1902 · Pennsylvania
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — York-County, Pennsylvania
Open full size
1940 US Federal Census — York-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03644-00061)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Daisy E. Taylor | 43 | Wife | — | Pennsylvania |
| 2 | Clarence S. Bryner | 28 | Head | Agronomist | Pennsylvania |
| 3 | Mary E. Bryner | 27 | Wife | — | Pennsylvania |
| 4 | John W. Bryner | 5 | Son | — | Pennsylvania |
| 5 | John D. Decker THIS PERSON | 38 | Head | Polisher | Pennsylvania |
| 6 | Ada N. Decker | 37 | Wife | — | Pennsylvania |
| 7 | Donald D. Decker | 12 | Son | — | Pennsylvania |
| 8 | Carroll J. Decker | 9 | Son | — | Pennsylvania |
| 9 | Robert L. Decker | 7 | Son | — | Pennsylvania |
| 10 | Paul B. Rohrbaugh | 41 | Head | Farmer | Pennsylvania |
| 11 | Mabel Rohrbaugh | 40 | Wife | — | Pennsylvania |
| 12 | Gordon E. Rohrbaugh | 17 | Son | Laborer | Pennsylvania |
| 13 | Paul Jr. Rohrbaugh | 13 | Son | — | Pennsylvania |
| 14 | Harold R. Rohrbaugh | 11 | Son | — | Pennsylvania |
| 15 | Lyndon S. Rohrbaugh | 8 | Son | — | Pennsylvania |
| 16 | Harry H. Hildebrand | 61 | Head | Farmer | Pennsylvania |
| 17 | Minnie E. Hildebrand | 61 | Wife | — | Pennsylvania |
| 18 | Elmer L. Briner | 29 | Head | Soil Conservationist | Ohio |
| 19 | Mary F. Briner | 27 | Wife | — | Ohio |
| 20 | Walter J. Ludwig | 26 | Head | Laborer | Pennsylvania |
| 21 | Mary E. Ludwig | 41 | Wife | — | Pennsylvania |
| 22 | Thelma R. Ludwig | 3 | Daughter | — | Pennsylvania |
| 23 | Helen M. Torbert | 16 | Stepdaughter | — | Pennsylvania |
| 24 | Alice E. Torbert | 10 | Stepdaughter | — | Pennsylvania |
| 25 | Janet F. Torbert | 7 | Stepdaughter | — | Pennsylvania |
| 26 | Emanuel S. Allison | 85 | Head | — | Pennsylvania |
| 27 | Leah Allison | 80 | Wife | — | Pennsylvania |
| 28 | Erma E. Allison | 49 | Daughter | Teacher | Pennsylvania |
| 29 | Jack J. Smith | 29 | Head | Laborer | Virginia |
| 30 | Elizabeth C. Smith | 25 | Wife | — | Virginia |
| 31 | Tommy E. Smith | 0 | Son | — | Pennsylvania |
| 32 | Paul W. Shepperd | 38 | Head | Mechanic | Pennsylvania |
| 33 | Anna M. Shepperd | 38 | Wife | — | Pennsylvania |
| 34 | Margaret V. Shepperd | 17 | Daughter | — | Pennsylvania |
| 35 | Paul W. Shepperd | 15 | Son | — | Pennsylvania |
| 36 | Linda A. Shepperd | 7 | Daughter | — | Pennsylvania |
| 37 | Julia E. Shepperd | 2 | Daughter | — | Pennsylvania |
| 38 | Harry S. Gemmill | 66 | Head | Mechanic | Pennsylvania |
| 39 | Malinda Gemmill | 71 | Wife | — | Pennsylvania |
| 40 | Rebecca Gerbrick | 72 | Lodger | — | Pennsylvania |
Pedigree Summary
John
Gen 1 · 2 parents
~0.92
Max depth 4 (1900–1950 window)
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)