EN
Earl Nelson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Mcdonough-County, Illinois
Our Model Tree links this Earl Nelson across the 1930 and 1940 US Censuses in Mcdonough-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1919), then head of a 9-person household.
Age 21
b. ~1919
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Mcdonough-County, Illinois |
| Surname | Nelson |
| Given Name | Earl |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chalmers Township |
| 1935 Residence (County) | McDonough |
| Additional Details | |
| Class of Worker | NP |
| Hours Worked | 0 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chalmers Township |
| Est. Birth Year | ~1919 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Earl | Age | Birth yr |
|---|---|---|---|---|
| Tommy Nelson | Son | — | 23 | ~1917 |
| Lois Nelson | Daughter | — | 3 | ~1937 |
| Betty Nelson | Daughter | — | 7 | ~1933 |
| Earl Nelson | Son | — | 21 | ~1919 |
| Frank Nelson | Head | — | 56 | ~1884 |
| Mildred Nelson | Daughter | — | 18 | ~1922 |
| Dorathey Nelson | Daughter | — | 12 | ~1928 |
| Ollie Nelson | Spouse | — | 51 | ~1889 |
| Edna Nelson | Daughter | — | 15 | ~1925 |
Census Appearances
1930
Mcdonough, Illinois
Son, age 10
Mcdonough, Illinois · implied b. ~1920 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nelson |
| Given Name | Earl |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Mcdonough-County, Illinois
Son, age 21
Mcdonough-County, Illinois · implied b. ~1919 — 9 household members
| Surname | Nelson |
| Given Name | Earl |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chalmers Township |
| 1935 Residence (County) | McDonough |
| Class of Worker | NP |
| Hours Worked | 0 |
| 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 Earl Nelson across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Earl Nelson
Son · 1940 · age 21 · b. ~1919 · Illinois
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Sibling
Lois Nelson
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mildred Nelson
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Betty Nelson
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edna Nelson
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorathey Nelson
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Tommy Nelson
Sibling · 1940 · age 23
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 — Mcdonough-County, Illinois
Open full size
1940 US Federal Census — Mcdonough-County, Illinois
Page Contents
20 people indexed on this census page (nara:1940:m-t0627-00839-00226)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Ambrose J. Phillips | 40 | Head | Farmer | Missouri |
| 2 | Sina L. Phillips | 36 | Wife | — | Missouri |
| 3 | Erma M. Phillips | 16 | Daughter | — | Missouri |
| 4 | Vera D. Phillips | 14 | Daughter | — | Missouri |
| 5 | Dennis G. Phillips | 10 | Son | — | Iowa |
| 6 | William D. James | 62 | Head | Farmer | Penn |
| 7 | Lydia James | 55 | Wife | — | Sweden |
| 8 | Frank Nelson | 56 | Head | Rock Crusher | Illinois |
| 9 | Ollie P. Nelson | 51 | Wife | — | Illinois |
| 10 | Tommy Nelson | 23 | Son | — | Illinois |
| 11 | Earl Nelson THIS PERSON | 21 | Son | — | Illinois |
| 12 | Mildred Nelson | 18 | Daughter | — | Illinois |
| 13 | Edna Mae Nelson | 15 | Daughter | — | Illinois |
| 14 | Dorathey Nelson | 12 | Daughter | — | Illinois |
| 15 | Betty Nelson | 7 | Daughter | — | Illinois |
| 16 | Lois Nelson | 3 | Daughter | — | Illinois |
| 17 | Arland Harker | 36 | Head | Farmer | Illinois |
| 18 | Hilda Harker | 32 | Wife | — | Illinois |
| 19 | Harriet Harker | 11 | Daughter | — | Illinois |
| 20 | Arland Jr. Harker | 7 | Son | — | Illinois |
Related Census Records
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)