RN
Ralph Nelson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Roberts-County, South Dakota
Our Model Tree links this Ralph Nelson across the 1930 and 1940 US Censuses in Roberts-County, South Dakota (XGBoost, ~Confirmed) — first a son (b.~1917), then head of a 7-person household.
Age 23
b. ~1917
Male
Son
Born: South Dakota
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Roberts-County, South Dakota |
| Surname | Nelson |
| Given Name | Ralph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | South Dakota |
| 1935 Residence (City) | White Rock Township |
| 1935 Residence (County) | Roberts |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 52 |
| Income (1939) | 0 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
| Occupation | Farmer |
| Township / Ward | White Rock Township |
| Est. Birth Year | ~1917 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Ralph | Age | Birth yr |
|---|---|---|---|---|
| Bernice Nelson | Daughter | — | 16 | ~1924 |
| Grace Nelson | Daughter | — | 21 | ~1919 |
| Lillian Nelson | Spouse | — | 44 | ~1896 |
| Virginia Nelson | Daughter | — | 14 | ~1926 |
| Archie Nelson | Son | — | 19 | ~1921 |
| Ralph Nelson | Son | — | 23 | ~1917 |
| H Nelson | Head | — | 50 | ~1890 |
Census Appearances
1930
Roberts, South …
Son, age 13
Roberts, South Dakota · implied b. ~1917 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nelson |
| Given Name | Ralph E. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | South Dakota |
| Father's Birthplace | Minnesota |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
1940
Roberts-County, South …
Son, age 23
Roberts-County, South Dakota · implied b. ~1917 — 7 household members
| Surname | Nelson |
| Given Name | Ralph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | South Dakota |
| 1935 Residence (City) | White Rock Township |
| 1935 Residence (County) | Roberts |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 52 |
| Income (1939) | 0 |
| Highest Grade | 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.
Show:
This person
Anchor record
Ralph Nelson
Son · 1940 · age 23 · b. ~1917 · South Dakota
★ You are viewing this record
Sibling
Archie Nelson
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Grace Nelson
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bernice Nelson
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Virginia Nelson
Sibling · 1940 · age 14
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 — Roberts-County, South Dakota
Open full size
1940 US Federal Census — Roberts-County, South Dakota
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03866-01001)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Soren J. Hanson | 28 | Head | Farmer | North Dakota |
| 2 | Ann (X) Hanson | 22 | Wife | — | North Dakota |
| 3 | Marianne Hanson | 3 | Daughter | — | North Dakota |
| 4 | Maureen Hanson | 1 | Daughter | — | North Dakota |
| 5 | Jennie (X) Johnson | 63 | Head | — | Minnesota |
| 6 | Walter Johnson | 36 | Son | Farmer | South Dakota |
| 7 | Clarence Johnson | 31 | Son | Farm Laborer | South Dakota |
| 8 | Clifford Johnson | 23 | Son | Farmer | South Dakota |
| 9 | Margaret Johnson | 19 | Daughter in law | — | Minnesota |
| 10 | Maggie (X) Birchem | 57 | Head | — | Germany |
| 11 | Henry Birchem | 21 | Son | Farm Laborer | South Dakota |
| 12 | Leo Birchem | 20 | Son | Farm Laborer | South Dakota |
| 13 | Matt Birchem | 18 | Son | Farm Laborer | South Dakota |
| 14 | Joseph Birchem | 15 | Son | — | South Dakota |
| 15 | Louis (X) Birchem | 30 | Head | Farm Laborer | South Dakota |
| 16 | Esther Birchem | 30 | Wife | — | Minnesota |
| 17 | Donald Birchem | 9 | Son | — | South Dakota |
| 18 | Louis Birchem | 7 | Son | — | South Dakota |
| 19 | Lillian Birchem | 4 | Daughter | — | South Dakota |
| 20 | Carol Birchem | 3 | Daughter | — | South Dakota |
| 21 | Marianne Birchem | 1 | Daughter | — | South Dakota |
| 22 | Newell H. Hardie | 29 | Head | Laborer | North Dakota |
| 23 | Ethel (X) Hardie | 24 | Wife | — | South Dakota |
| 24 | Walter Hardie | 1 | Son | — | North Dakota |
| 25 | Norma Hardie | 0 | Daughter | — | South Dakota |
| 26 | Guy J. (X) Bardsley | 69 | Head | Farmer | Wisconsin |
| 27 | Lillie Larson | 65 | Sister | — | Iowa |
| 28 | Matt Kiefer | 70 | Head | Farmer | Iowa |
| 29 | William Bush | 41 | Son in law | Laborer | Iowa |
| 30 | Leona (X) Bush | 40 | Daughter | — | Iowa |
| 31 | Donald Bush | 14 | Grandson | — | Minnesota |
| 32 | John L. (X) Drummond | 55 | Head | Farmer | Minnesota |
| 33 | Belle M. Drummond | 54 | Wife | — | South Dakota |
| 34 | H. E. Manuel Nelson | 50 | Head | Farmer | Minnesota |
| 35 | Lillian (X) Nelson | 44 | Wife | — | Illinois |
| 36 | Ralph Nelson THIS PERSON | 23 | Son | Farmer | South Dakota |
| 37 | Grace Nelson | 21 | Daughter | Maid | South Dakota |
| 38 | Archie Nelson | 19 | Son | Farm Laborer | North Dakota |
| 39 | Bernice Nelson | 16 | Daughter | — | South Dakota |
| 40 | Virginia Nelson | 14 | Daughter | — | South Dakota |
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)