JD
John Decker — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Ozaukee-County, Wisconsin
Our Model Tree links this John Decker across the 1930 and 1940 US Censuses in Ozaukee-County, Wisconsin (XGBoost, ~Confirmed) — first a son (b.~1924), then head of a 11-person household.
Age 16
b. ~1924
Male
Son
Born: Wisconsin
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Ozaukee-County, Wisconsin |
| Surname | Decker |
| Given Name | John G. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Wisconsin |
| 1935 Residence (City) | Port Washington town |
| 1935 Residence (County) | Ozaukee |
| Additional Details | |
| Highest Grade | Hs 1 |
| 1935 Residence | Same place |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
| Township / Ward | Port Washington Town |
| Est. Birth Year | ~1924 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| John Decker | Son | — | 16 | ~1924 |
| Jean Decker | Daughter | — | 13 | ~1927 |
| John Decker | Son | — | 1 | ~1939 |
| John Decker | Head | — | 53 | ~1887 |
| Anna Decker | Spouse | — | 50 | ~1890 |
| Mildred Decker | Daughter | — | 28 | ~1912 |
| Shirley Decker | Daughter | — | 10 | ~1930 |
| Clarence Decker | Son | — | 26 | ~1914 |
| Orlando Decker | Son | — | 22 | ~1918 |
| Bernice Decker | Daughter | — | 21 | ~1919 |
| Marvin Decker | Son | — | 19 | ~1921 |
Census Appearances
1930
Ozaukee, Wisconsin
Son, age 6
Ozaukee, Wisconsin · implied b. ~1924 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Decker |
| Given Name | John A. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Wisconsin |
| Father's Birthplace | Wisconsin |
| Mother's Birthplace | Wisconsin |
| Occupation | none |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
1940
Ozaukee-County, Wisconsin
Son, age 16
Ozaukee-County, Wisconsin · implied b. ~1924 — 11 household members
| Surname | Decker |
| Given Name | John G. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Wisconsin |
| 1935 Residence (City) | Port Washington town |
| 1935 Residence (County) | Ozaukee |
| Highest Grade | Hs 1 |
| 1935 Residence | Same place |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
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 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Decker
Son · 1940 · age 16 · b. ~1924 · Wisconsin
★ You are viewing this record
Sibling
Jean Decker
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Shirley Decker
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marvin Decker
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Orlando Decker
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Clarence Decker
Sibling · 1940 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Decker
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mildred Decker
Sibling · 1940 · age 28
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bernice Decker
Sibling · 1940 · age 21
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 — Ozaukee-County, Wisconsin
Open full size
1940 US Federal Census — Ozaukee-County, Wisconsin
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-04510-00488)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Kenneth Austen | 31 | Hired hand | Farm Helper | Michigan |
| 42 | Albert A. Rudolph | 11 | Son | — | Wisconsin |
| 43 | John P. O. Decker | 53 | Head | Truck Driver | Wisconsin |
| 44 | Anna Decker | 50 | Wife | — | Wisconsin |
| 45 | Mildred J. Decker | 28 | Daughter | Housework | Wisconsin |
| 46 | Clarence M. Decker | 26 | Son | Sander | Wisconsin |
| 47 | Orlando R. Decker | 22 | Son | Laborer | Wisconsin |
| 48 | Bernice F. Decker | 21 | Daughter | Waitress | Wisconsin |
| 49 | Marvin A. Decker | 19 | Son | Laborer | Wisconsin |
| 50 | John G. Decker THIS PERSON | 16 | Son | — | Wisconsin |
| 51 | Jean F. Decker | 13 | Daughter | — | Wisconsin |
| 52 | Shirley A. Decker | 10 | Daughter | — | Wisconsin |
| 53 | John Decker | 1 | Son | — | Wisconsin |
| 54 | William C. A. Witte | 24 | Head | Laborer | Wisconsin |
| 55 | Margaret Witte | 28 | Wife | — | Wisconsin |
| 56 | Donald Witte | 2 | Son | — | Wisconsin |
| 57 | Alvin A. O. Thomas | 51 | Head | Farmer | Wisconsin |
| 58 | Ursula M. Thomas | 50 | Wife | — | Wisconsin |
| 59 | Florence U. Thomas | 27 | Daughter | Telephone Operator | Wisconsin |
| 60 | Geraldine E. Thomas | 18 | Daughter | — | Wisconsin |
| 61 | Robert A. Thomas | 15 | Son | — | Wisconsin |
| 62 | Ruth A. Thomas | 10 | Daughter | — | Wisconsin |
| 63 | Matthew N. O. Biever | 56 | Head | Machinist | Wisconsin |
| 64 | Anna E. Biever | 55 | Wife | — | Wisconsin |
| 65 | Albert G. O. Schuh | 30 | Head | Fireman | Wisconsin |
| 66 | Lily E. Schuh | 32 | Wife | — | Wisconsin |
| 67 | Kenneth G. Schuh | 9 | Son | — | Wisconsin |
| 68 | Russell K. Schuh | 6 | Son | — | Wisconsin |
| 69 | Anita A. King | 8 | Niece | — | Wisconsin |
| 70 | Henry F. O. Heller | 68 | Head | Cabinet Maker | Wisconsin |
| 71 | Bertha Heller | 62 | Wife | — | Germany |
| 72 | Raymond Heller | 40 | Son | Superintendent | Wisconsin |
| 73 | Raymond Heller | 15 | Grandson | — | Wisconsin |
| 74 | Bert W. Allen | 27 | Head | Sales Advertising | Missouri |
| 75 | Marion M. O. Allen | 22 | Wife | — | Wisconsin |
| 76 | George O. Kelly | 70 | Head | Farmer | Wisconsin |
| 77 | Harriet Kelly | 66 | Wife | — | Illinois |
| 78 | Harvey Kelly | 33 | Son | Cement Work | Wisconsin |
| 79 | Emil Simon | 47 | Head | — | Germany |
| 80 | Rudolph O. Simon | 23 | Son | Laborer | South Dakota |
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)