CN
Carl Nelson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Marshall-County, Iowa
Our Model Tree links this Carl Nelson across the 1920, 1930 and 1940 US Censuses in Marshall-County, Iowa (XGBoost, ~Confirmed), with identified parents Carl & Christina — first a head (b.~1902), then head of a 8-person household.
Age 38
b. ~1902
Male
Head
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Marshall-County, Iowa |
| Surname | Nelson |
| Given Name | Carl E. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Minerva Twp |
| 1935 Residence (County) | Marshall |
| Additional Details | |
| Occupation | Dragline operator |
| Industry | Drag line |
| Class of Worker | PW |
| Hours Worked | 60 |
| Income (1939) | 1200 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Dragline Operator |
| Township / Ward | Minerva Twp |
| Est. Birth Year | ~1902 |
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 1940 census.
| Name | Relation to head | Relative to Carl | Age | Birth yr |
|---|---|---|---|---|
| Shirley Nelson | Daughter | — | 12 | ~1928 |
| Carl Nelson | Head | — | 38 | ~1902 |
| Richard Nelson | Son | — | 14 | ~1926 |
| Max Nelson | Son | — | 10 | ~1930 |
| Larry Nelson | Son | — | 2 | ~1938 |
| Donald Nelson | Son | — | 7 | ~1933 |
| Earl Nelson | Son | — | 4 | ~1936 |
| Florence Nelson | Spouse | — | 35 | ~1905 |
Census Appearances
1920
Marshall, Iowa
Son, age 17
Marshall, Iowa · implied b. ~1903 — 8 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 | Iowa |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Laborer |
| Industry | Farm |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Marshall, Iowa
Head, age 28
Marshall, Iowa · implied b. ~1902 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nelson |
| Given Name | Carl E |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Iowa |
| Age at First Marriage | 23 |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Laborer |
| Industry | Sand Plant |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 12.00 |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Marshall-County, Iowa
Head, age 38
Marshall-County, Iowa · implied b. ~1902 — 8 household members
| Surname | Nelson |
| Given Name | Carl E. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Minerva Twp |
| 1935 Residence (County) | Marshall |
| Occupation | Dragline operator |
| Industry | Drag line |
| Class of Worker | PW |
| Hours Worked | 60 |
| Income (1939) | 1200 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
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 Carl Nelson (~0.92 confidence) and mother Christina Nelson (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Carl Nelson
b. ~1874
Source father
● Household
· direct · ~0.92
Mother
Christina Nelson
b. ~1880
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Carl Nelson
Head · 1940 · age 38 · b. ~1902 · Iowa
★ 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 — Marshall-County, Iowa
Open full size
1940 US Federal Census — Marshall-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01182-00888)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Merrill Rhodes | 19 | Head | Laborer | Iowa |
| 42 | Mildred Rhodes | 17 | Daughter | — | Iowa |
| 43 | Thelma Rhodes | 14 | Daughter | — | Iowa |
| 44 | Norman Rhodes | 5 | Son | — | Iowa |
| 45 | Lowell Rhodes | 0 | Son | — | Iowa |
| 46 | George Jeter | 72 | Head | Information From Neighbor | N. Carolina |
| 47 | Matilda Jeter | 87 | Wife | — | N. Carolina |
| 48 | Carl E. Nelson THIS PERSON | 38 | Head | Dragline Operator | Iowa |
| 49 | Florence Nelson | 35 | Wife | — | Iowa |
| 50 | Richard R. Nelson | 14 | Son | — | Iowa |
| 51 | Shirley N. Nelson | 12 | Daughter | — | Iowa |
| 52 | Max E. Nelson | 10 | Son | — | Iowa |
| 53 | Donald C. Nelson | 7 | Son | — | Iowa |
| 54 | Earl P. Nelson | 4 | Son | — | Iowa |
| 55 | Larry V. Nelson | 2 | Son | — | Iowa |
| 56 | Harold Clark | 29 | Head | Farmer | Illinois |
| 57 | Margaret Clark | 25 | Wife | — | Missouri |
| 58 | Doris Clark | 4 | Daughter | — | Iowa |
| 59 | Florence Clark | 2 | Daughter | — | Iowa |
| 60 | Keith Clark | 0 | Son | — | Iowa |
| 61 | Isaac Thimel | 54 | Head | Farm Hand | Iowa |
| 62 | Cora Thimel | 44 | Wife | — | Iowa |
| 63 | Melvin Thimel | 16 | Son | — | Iowa |
| 64 | Marvin Thimel | 11 | Son | — | Iowa |
| 65 | Corrine Thimel | 5 | Daughter | — | Iowa |
| 66 | Frank Tucker | 69 | Head | Farmer | Iowa |
| 67 | William Jones | 44 | Son-in-law | Truck Driver | Iowa |
| 68 | Edna Jones | 39 | Daughter | — | Iowa |
| 69 | Ella Mae Jones | 14 | Granddaughter | — | Iowa |
| 70 | Vernon Jones | 5 | Grandson | — | Iowa |
| 71 | — | None | — | — | — |
| 72 | Frank Clemons | 56 | Head | Farmer | Iowa |
| 73 | Clyde Clemons | 18 | Son | Farm Hand | Iowa |
| 74 | Louis Nichols | 31 | Head | Farmer | Iowa |
| 75 | Marie Nichols | 31 | Wife | — | Missouri |
| 76 | Shirley Mae Nichols | 10 | Daughter | — | Iowa |
| 77 | Fred Nichols | 9 | Son | — | Iowa |
| 78 | Wayne Elsberry | 23 | Head | Truck Driver | Wisconsin |
| 79 | Mary Elsberry | 23 | Wife | — | Iowa |
| 80 | — | None | — | — | — |
Pedigree Summary
Carl
Gen 1 · 2 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)