RN
Ralph Nelson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Deuel-County, South Dakota
Our Model Tree links this Ralph Nelson across the 1930 and 1940 US Censuses in Deuel-County, South Dakota (XGBoost, ~Confirmed) — first a head (b.~1901), then head of a 8-person household.
Age 39
b. ~1901
Male
Head
Born: South Dakota
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Deuel-County, South Dakota |
| Surname | Nelson |
| Given Name | Ralph |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | South Dakota |
| 1935 Residence (City) | Toronto |
| 1935 Residence (County) | Deuel |
| Additional Details | |
| Occupation | Electrician |
| Industry | Union Public Co. |
| Class of Worker | E |
| Hours Worked | 60 |
| Income (1939) | 1200 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
| Occupation | Electrician |
| Township / Ward | Toronto |
| Est. Birth Year | ~1901 |
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 Ralph | Age | Birth yr |
|---|---|---|---|---|
| Ralph Nelson | Head | — | 39 | ~1901 |
| Lydia Nelson | Spouse | — | 27 | ~1913 |
| Orville Nelson | Son | — | 11 | ~1929 |
| Arlen Nelson | Son | — | 10 | ~1930 |
| Beverly Nelson | Daughter | — | 8 | ~1932 |
| Laverne Nelson | Daughter | — | 3 | ~1937 |
| Larry Nelson | Son | — | ~1940 | |
| Roger Nelson | Son | — | 16 | ~1924 |
Census Appearances
1930
Deuel, South …
Other, age 29
Deuel, South Dakota · implied b. ~1901 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nelson |
| Given Name | Ralph |
| Relationship to Head | Son-in-law |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Married |
| Birthplace | South Dakota |
| Age at First Marriage | 23 |
| Father's Birthplace | South Dakota |
| Mother's Birthplace | Norway |
| Occupation | Laborer |
| Industry | Farm |
| Class of Worker | VVVV |
| Can Read/Write | Yes |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
1940
Deuel-County, South …
Head, age 39
Deuel-County, South Dakota · implied b. ~1901 — 8 household members
| Surname | Nelson |
| Given Name | Ralph |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | South Dakota |
| 1935 Residence (City) | Toronto |
| 1935 Residence (County) | Deuel |
| Occupation | Electrician |
| Industry | Union Public Co. |
| Class of Worker | E |
| Hours Worked | 60 |
| Income (1939) | 1200 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| 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 Ralph Nelson across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Ralph Nelson
Head · 1940 · age 39 · b. ~1901 · South Dakota
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Deuel-County, South Dakota
Open full size
1940 US Federal Census — Deuel-County, South Dakota
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03854-00722)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Lena Underland | 45 | Head | Housework | South Dakota |
| 42 | Lorna Underland | 17 | Daughter | — | South Dakota |
| 43 | Shirley Underland | 15 | Daughter | — | South Dakota |
| 44 | Arvella Underland | 14 | Daughter | — | South Dakota |
| 45 | Norma Underland | 11 | Daughter | — | South Dakota |
| 46 | Dennis Underland | 9 | Son | — | South Dakota |
| 47 | Ralph Nelson THIS PERSON | 39 | Head | Electrician | South Dakota |
| 48 | Lydia Nelson | 27 | Wife | — | South Dakota |
| 49 | Roger Nelson | 16 | Son | — | South Dakota |
| 50 | Orville Nelson | 11 | Son | — | South Dakota |
| 51 | Arlen Nelson | 10 | Son | — | South Dakota |
| 52 | Beverly Nelson | 8 | Daughter | — | South Dakota |
| 53 | Laverne Nelson | 3 | Daughter | — | South Dakota |
| 54 | Larry Nelson | 0 | Son | — | South Dakota |
| 55 | Louis Lunden | 31 | Head | Laborer | South Dakota |
| 56 | Mae Lunden | 26 | Wife | — | South Dakota |
| 57 | Lester Lunden | 5 | Son | — | South Dakota |
| 58 | Loretta Lunden | 3 | Daughter | — | South Dakota |
| 59 | Diane Lunden | 2 | Daughter | — | South Dakota |
| 60 | Ole Mikkelson | 62 | Head | Retired | Wisconsin |
| 61 | Anna Mikkelson | 60 | Wife | — | Norway |
| 62 | Gladys Mikkelson | 28 | Daughter | Teacher | South Dakota |
| 63 | John Okay | 36 | Head | Manager | President | South Dakota |
| 64 | Lola Okay | 34 | Wife | — | South Dakota |
| 65 | Wallace Okay | 12 | Son | — | South Dakota |
| 66 | Hildegarde Okay | 5 | Daughter | — | Minnesota |
| 67 | Andy Bjerke | 25 | Lodger | Trucker | — |
| 68 | Ella Jeglum | 42 | Head | — | South Dakota |
| 69 | Gerald Jeglum | 17 | Son | — | — |
| 70 | Betty Jeglum | 14 | Daughter | — | — |
| 71 | Donha Jeglum | 12 | Daughter | — | — |
| 72 | Ardell Jeglum | 9 | Son | — | — |
| 73 | Donald Jeglum | 6 | Son | — | South Dakota |
| 74 | Jo Anne Jeglum | 2 | Daughter | — | — |
| 75 | Marvin Thompson | 42 | Head | Manager | South Dakota |
| 76 | Anna Thompson | 32 | Wife | — | South Dakota |
| 77 | Marylou Thompson | 11 | Daughter | — | Minnesota |
| 78 | Betty Clara Thompson | 4 | Daughter | — | Minnesota |
| 79 | Wayne Thompson | 1 | Son | — | Minnesota |
| 80 | Shirley Jean Thompson | 0 | Daughter | — | South Dakota |
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)