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William Decker — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Marion, Illinois
Our Model Tree links this William Decker across the 1930 and 1940 US Censuses in Marion, Illinois (XGBoost, ~Confirmed) — first a son (b.~1926), then head of a 8-person household.
Age 4
b. ~1926
Male
Son
Born: Illinois
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Marion, Illinois |
| Surname | Decker |
| Given Name | William Leon |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Salem City |
| 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.
8 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| William Decker | Son | — | 4 | ~1926 |
| Alice Decker | Spouse | — | 40 | ~1890 |
| Cecil Decker | Son | — | 16 | ~1914 |
| Jake Decker | Head | — | 44 | ~1886 |
| Nellie Decker | Daughter | — | 20 | ~1910 |
| Noble Decker | Son | — | 20 | ~1910 |
| Opal Decker | Daughter | — | 14 | ~1916 |
| Earl Decker | Son | — | 19 | ~1911 |
Census Appearances
1930
Marion, Illinois
Son, age 4
Marion, Illinois · implied b. ~1926 — 8 household members
| Surname | Decker |
| Given Name | William Leon |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Marion-County, Illinois
Other, age 13
Marion-County, Illinois · implied b. ~1927 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Dicker |
| Given Name | William |
| Relationship to Head | Step-son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Omega Township |
| 1935 Residence (County) | Marion |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 William Decker across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Decker
Son · 1930 · age 4 · b. ~1926 · Illinois
★ You are viewing this record
Sibling
Noble Decker
Sibling · 1930 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Cecil Decker
Sibling · 1930 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Nellie Decker
Sibling · 1930 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Opal Decker
Sibling · 1930 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Earl Decker
Sibling · 1930 · age 19
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
1930 US Federal Census — Marion, Illinois
Open full size
1930 US Federal Census — Marion, Illinois
Page Contents
50 people indexed on this census page (ia:1930:illinoiscensus00reel543:0890)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Bedford Wilkins | 23 | Head | Truck Driver | Illinois |
| 52 | Marie Wilkins | 20 | Wife | — | Illinois |
| 53 | Francis L. Wilkins | 1 | Daughter | — | Illinois |
| 54 | Pleasant B. Wilkins | 50 | Head | Laborer | Illinois |
| 55 | Emma Wilkins | 50 | Wife | — | Illinois |
| 56 | Sharon Wilkins | 18 | Son | Laborer | Illinois |
| 57 | Henry D. Sellers | 29 | Head | Laborer | Illinois |
| 58 | Delala Sellers | 27 | Wife | — | Illinois |
| 59 | Albert Hinman | 57 | Father-in-law | Contractor | Indiana |
| 60 | Jake Decker | 44 | Head | Laborer | Illinois |
| 61 | Alice M. Decker | 40 | Wife | — | Illinois |
| 62 | Noble Decker | 20 | Son | Laborer | Illinois |
| 63 | Nellie Decker | 20 | Daughter | Inspector | Illinois |
| 64 | Earl Decker | 19 | Son | Tracer | Illinois |
| 65 | Cecil Decker | 16 | Son | Laborer | Illinois |
| 66 | Opal M. Decker | 14 | Daughter | — | Illinois |
| 67 | William Leon Decker THIS PERSON | 4 | Son | — | Illinois |
| 68 | Robert Sellers | 34 | Head | Laborer | Illinois |
| 69 | Eva Sellers | 26 | Wife | — | Missouri |
| 70 | Lyle J. Sellers | 4 | Daughter | — | Illinois |
| 71 | Thelma C. Sellers | 2 | Daughter | — | Illinois |
| 72 | Betty Mae Sellers | 0 | Daughter | — | Illinois |
| 73 | Otto Henry | 21 | Brother | Contractor | Illinois |
| 74 | Elza Odell | 38 | Head | Machinist | Illinois |
| 75 | Zella Odell | 36 | Wife | — | Illinois |
| 76 | Estel Odell | 17 | Son | — | Illinois |
| 77 | Francis Odell | 11 | Son | — | Illinois |
| 78 | Lawrence Odell | 8 | Son | — | Illinois |
| 79 | Laurel Decker | 40 | Head | Farmer | Illinois |
| 80 | Faye Decker | 40 | Wife | — | Ohio |
| 81 | Lawrence Decker | 19 | Son | Laborer | Illinois |
| 82 | Roberta Decker | 11 | Daughter | — | Illinois |
| 83 | Harvey Decker | 2 | Son | — | Illinois |
| 84 | Golden Dodson | 30 | Head | Laborer | Illinois |
| 85 | Lilia Dodson | 31 | Wife | — | Germany |
| 86 | Gason Dodson | 9 | Son | — | Illinois |
| 87 | Tina Dodson | 8 | Daughter | — | Illinois |
| 88 | Martha Dodson | 5 | Daughter | — | Illinois |
| 89 | Freddie Dodson | 2 | Son | — | Illinois |
| 90 | Charles Dodson | 28 | Head | Laborer | Illinois |
| 91 | Ruby Dodson | 21 | Wife | — | Illinois |
| 92 | Harry L. Dodson | 2 | Son | — | Illinois |
| 93 | Clyde Dodson | 17 | Brother | Stamping | Illinois |
| 94 | Arron Wilkins | 22 | Head | Laborer | Illinois |
| 95 | Mabel Wilkins | 17 | Wife | — | Illinois |
| 96 | Doil M. Horn | 37 | Head | Teamster | Arkansas |
| 97 | Martha Horn | 35 | Wife | — | Arkansas |
| 98 | Raymond O. Horn | 19 | Son | Laborer | Arkansas |
| 99 | Harold Horn | 16 | Son | — | Arkansas |
| 100 | Guy Horn | 12 | Son | — | Arkansas |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)