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John Decker — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this John Decker across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1885), then head of a 5-person household.
Age 55
b. ~1885
Male
Head
Born: Holland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Decker |
| Given Name | John M |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 55 |
| Marital Status | Married |
| Birthplace | Holland |
| 1935 Residence (City) | Cicero town |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | garbage collector |
| Industry | municipal business |
| Class of Worker | OA |
| Hours Worked | 40 |
| Income (1939) | 0 |
| Highest Grade | No 4 |
| 1935 Residence | Same house |
| Birth Country | Netherlands |
| Birthplace (normalized) | holland |
| Occupation | Garbage Collector |
| Township / Ward | Cicero Town |
| Est. Birth Year | ~1885 |
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 |
|---|---|---|---|---|
| Melvin Decker | Son | — | 19 | ~1921 |
| Teresa Decker | Daughter | — | 21 | ~1919 |
| Lena Decker | Spouse | — | 56 | ~1884 |
| Margaret Decker | Daughter | — | 26 | ~1914 |
| John Decker | Head | — | 55 | ~1885 |
Census Appearances
1920
Cook, Illinois
Head, age 35
Cook, Illinois · implied b. ~1885 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Decker |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Holland |
| Year of Immigration | 1905 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Holland |
| Mother's Birthplace | Holland |
| Occupation | Mechanic |
| Industry | Automobile |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Dutch |
| Home Owned/Rented | O |
| Home Free/Mortgaged | M |
| Birth Country | Netherlands |
| Year of Naturalization | 1912 |
| Birthplace (normalized) | holland |
1930
Cook, Illinois
Head, age 45
Cook, Illinois · implied b. ~1885 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Decker |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Holland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1901 |
| Age at First Marriage | 22 |
| Father's Birthplace | Holland |
| Mother's Birthplace | Holland |
| Occupation | Scavenger |
| Industry | Private |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Mother Tongue | Dutch |
| Home Owned/Rented | O |
| Home Value / Rent | 3,000 |
| Radio Set | R |
| Veteran | No |
| Birth Country | Netherlands |
| Birthplace (normalized) | holland |
1940
Cook-County, Illinois
Head, age 55
Cook-County, Illinois · implied b. ~1885 — 5 household members
| Surname | Decker |
| Given Name | John M |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 55 |
| Marital Status | Married |
| Birthplace | Holland |
| 1935 Residence (City) | Cicero town |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Occupation | garbage collector |
| Industry | municipal business |
| Class of Worker | OA |
| Hours Worked | 40 |
| Income (1939) | 0 |
| Highest Grade | No 4 |
| 1935 Residence | Same house |
| Birth Country | Netherlands |
| Birthplace (normalized) | holland |
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 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Decker
Head · 1940 · age 55 · b. ~1885 · Illinois
★ 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 — Cook-County, Illinois
Open full size
1940 US Federal Census — Cook-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00776-00278)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mary Ann Elia | 5 | Daughter | — | Illinois |
| 2 | John Elia | 2 | Son | — | Illinois |
| 3 | John Necker | 65 | Head | Button Hole Maker | Czechoslovakia |
| 4 | Julia Necker | 57 | Wife | — | Czechoslovakia |
| 5 | George H Necker | 30 | Son | Clerk | Illinois |
| 6 | Emil O Kocher | 45 | Head | Polisher | Illinois |
| 7 | Josephine H Kocher | 43 | Wife | — | Illinois |
| 8 | George E Kocher | 24 | Son | Shipping Clerk | Illinois |
| 9 | William A Breton | 50 | Head | Bricklayer | Illinois |
| 10 | Emma L Breton | 44 | Wife | — | Illinois |
| 11 | Wilfred A Breton | 15 | Son | — | Illinois |
| 12 | Joseph H Patgelt | 45 | Head | Packer | Illinois |
| 13 | Rose Patgelt | 46 | Wife | — | Illinois |
| 14 | Vernella H Patgelt | 25 | Daughter | Assembler | Illinois |
| 15 | Bernice L Patgelt | 23 | Daughter | Maid | Illinois |
| 16 | Elizabeth A Patgelt | 21 | Daughter | Assembler | Illinois |
| 17 | Joseph E Patgelt | 19 | Son | New Worker | Illinois |
| 18 | Audrey A Patgelt | 17 | Daughter | — | Illinois |
| 19 | Raymond A Patgelt | 14 | Son | — | Illinois |
| 20 | Ethel D Patgelt | 11 | Daughter | — | Illinois |
| 21 | Howard F Patgelt | 9 | Son | — | Illinois |
| 22 | Donald E Patgelt | 8 | Son | — | Illinois |
| 23 | Kenneth E Patgelt | 6 | Son | — | Illinois |
| 24 | Elmer H Patgelt | 45 | Brother | Salesman | Illinois |
| 25 | Joseph J Bekeny | 60 | Head | Wood Worker | Czechoslovakia |
| 26 | Marie S Bekeny | 58 | Wife | — | Czechoslovakia |
| 27 | Marie Bekeny | 31 | Daughter | Stenographer | Illinois |
| 28 | Ervin Bekeny | 23 | Son | Salesman | Illinois |
| 29 | Ben Boer | 51 | Head | Truck Driver | Holland |
| 30 | Teresa Boer | 47 | Wife | — | Holland |
| 31 | Elizabeth P Boer | 21 | Daughter | Stenographer | Holland |
| 32 | Arthur H Boer | 18 | Son | Machine Operator | Holland |
| 33 | Herman S Boer | 12 | Son | — | Illinois |
| 34 | George Hlava | 50 | Head | Clothing Cutter | Illinois |
| 35 | Molly V Hlava | 44 | Wife | — | Illinois |
| 36 | John M Decker THIS PERSON | 55 | Head | Garbage Collector | Holland |
| 37 | Lena Decker | 56 | Wife | — | Holland |
| 38 | Margaret Decker | 26 | Daughter | Clerk | Illinois |
| 39 | Teresa Decker | 21 | Daughter | Typist | Illinois |
| 40 | Melvin Decker | 19 | Son | Garage Helper | Illinois |
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)