CN
Carl Nelson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Mclean-County, Illinois
Our Model Tree links this Carl Nelson across the 1920, 1930 and 1940 US Censuses in Mclean-County, Illinois (XGBoost, ~Confirmed), with identified parents Gust & Gus — first a son (b.~1913), then head of a 5-person household.
Age 27
b. ~1913
Male
Son
Born: South Dakota
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Mclean-County, Illinois |
| Surname | Nelson |
| Given Name | Carl |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | South Dakota |
| 1935 Residence (City) | Bloomington |
| 1935 Residence (County) | McLean |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | C-3 |
| 1935 Residence | Illinois |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
| Township / Ward | Mount Hope Township |
| Est. Birth Year | ~1913 |
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 Carl | Age | Birth yr |
|---|---|---|---|---|
| Marian Nelson | Daughter | — | 18 | ~1922 |
| Lillian Nelson | Daughter | — | 35 | ~1905 |
| Gust Nelson | Head | — | 58 | ~1882 |
| Carl Nelson | Son | — | 27 | ~1913 |
| Gerda Nelson | Spouse | — | 55 | ~1885 |
Census Appearances
1920
Mclean, Illinois
Son, age 7
Mclean, Illinois · implied b. ~1913 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nelson |
| Given Name | Carl |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | South Dakota |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Swedish |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
1930
Mclean, Illinois
Son, age 17
Mclean, Illinois · implied b. ~1913 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nelson |
| Given Name | Carl |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | South Dakota |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Can Read/Write | Yes |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
1940
Mclean-County, Illinois
Son, age 27
Mclean-County, Illinois · implied b. ~1913 — 5 household members
| Surname | Nelson |
| Given Name | Carl |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | South Dakota |
| 1935 Residence (City) | Bloomington |
| 1935 Residence (County) | McLean |
| Income (1939) | 0 |
| Highest Grade | C-3 |
| 1935 Residence | Illinois |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
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 Carl Nelson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Gust Nelson (~0.92 confidence) and father Gus Nelson (~0.92 confidence) and father Gust Nelson (~0.92 confidence) and mother Linda Nelson (~0.92 confidence) and mother Gertie Nelson (~0.92 confidence) and mother Gerda Nelson (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Gust Nelson
b. ~1882
Source father
● Household
· direct · ~0.92
Father
Gus Nelson
b. ~1883
Source father
● Household
· direct · ~0.92
Father
Gust Nelson
b. ~1883
Source father
● Household
· direct · ~0.92
Mother
Linda Nelson
b. ~1885
Source mother
● Household
· direct · ~0.92
Mother
Gertie Nelson
b. ~1885
Source mother
● Household
· direct · ~0.92
Mother
Gerda Nelson
b. ~1885
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Carl Nelson
Son · 1940 · age 27 · b. ~1913 · Illinois
★ You are viewing this record
Sibling
Marian Nelson
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lillian Nelson
Sibling · 1940 · age 35
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 — Mclean-County, Illinois
Open full size
1940 US Federal Census — Mclean-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00842-00266)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Avery G. Crawford | 49 | Head | Farmer | Illinois |
| 2 | Clara Crawford | 49 | Wife | — | Illinois |
| 3 | L. H. Crawford | 92 | Father | — | Ohio |
| 4 | Harry Belcamp | 65 | Head | Farmer | Holland |
| 5 | Anna Belcamp | 66 | Wife | — | Illinois |
| 6 | Frank Belcamp | 38 | Son | Farm Hand | Illinois |
| 7 | James M. Smith | 51 | Head | Farmer | Pennsylvania |
| 8 | Laura E. Smith | 47 | Wife | — | Illinois |
| 9 | Agnes Ebert | 8 | Niece | — | Illinois |
| 10 | Jones B. Reynolds | 46 | Head | Farmer | Illinois |
| 11 | Jessie M. Reynolds | 50 | Wife | — | Illinois |
| 12 | Charles Shake | 33 | Hired Man | Farm Hand | Indiana |
| 13 | Earl Smith | 30 | Head | Farmer | Illinois |
| 14 | Louise Smith | 31 | Wife | — | Illinois |
| 15 | Robert E. Smith | 2 | Son | — | Illinois |
| 16 | Lorraine Eades | 20 | Hired Girl | Maid | Minnesota |
| 17 | George Butts | 19 | Hired Man | Farm Hand | Missouri |
| 18 | Gust Nelson | 58 | Head | Farmer | Sweden |
| 19 | Gerda Nelson | 55 | Wife | — | Sweden |
| 20 | Lillian Nelson | 35 | Daughter | — | Illinois |
| 21 | Carl Nelson THIS PERSON | 27 | Son | — | South Dakota |
| 22 | Marian Nelson | 18 | Daughter | — | Illinois |
| 23 | Oscar Hockerby | 53 | Head | Farmer | Illinois |
| 24 | Eola Hockerby | 50 | Wife | — | Illinois |
| 25 | Vivian Hockerby | 20 | Daughter | — | Illinois |
| 26 | Freda Cruikshank | 24 | Daughter | — | Illinois |
| 27 | Alva Owens | 49 | Head | Farm Hand | Kentucky |
| 28 | Lorene Owens | 39 | Wife | — | Kentucky |
| 29 | James Owens | 14 | Son | — | Ohio |
| 30 | Wilmont Taylor | 44 | Laborer | Farm Hand | Kentucky |
| 31 | Florence Hensley | 48 | Head | — | Kansas |
| 32 | Wilbur Scott | 25 | Son-in-law | Farm Hand | Illinois |
| 33 | Edith Scott | 26 | Daughter | — | Missouri |
| 34 | Richard Scott | 4 | Grand-son | — | Illinois |
| 35 | Emory Arbuckle | 32 | Head | Farmer | Illinois |
| 36 | Ruby Arbuckle | 30 | Wife | — | Illinois |
| 37 | Weldon Girdler | 32 | Head | Farm Hand | Kentucky |
| 38 | Bessie Girdler | 28 | Wife | — | Illinois |
| 39 | Patricia Girdler | 9 | Daughter | — | Illinois |
| 40 | Robert Ray Girdler | 7 | Son | — | Illinois |
Related Census Records
Pedigree Summary
Carl + 2 siblings
Gen 1 · 6 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)