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Robert Olson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Minnehaha-County, South Dakota
Our Model Tree links this Robert Olson across the 1930 and 1940 US Censuses in Minnehaha-County, South Dakota (XGBoost, ~Confirmed) — first a son (b.~1921), then head of a 8-person household.
Age 19
b. ~1921
Male
Son
Born: South Dakota
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Minnehaha-County, South Dakota |
| Surname | Olson |
| Given Name | Robert W |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | South Dakota |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Minnehaha |
| Additional Details | |
| Occupation | Hired Hand |
| Industry | Agriculture |
| Class of Worker | PW |
| Hours Worked | 50 |
| Income (1939) | 240 |
| Highest Grade | H 4 |
| 1935 Residence | South Dakota |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
| Occupation | Hired Hand |
| Township / Ward | Red Rock Township |
| Est. Birth Year | ~1921 |
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 Robert | Age | Birth yr |
|---|---|---|---|---|
| Alan Olson | Son | — | 10 | ~1930 |
| Joyce Olson | Daughter | — | 13 | ~1927 |
| Quentin Olson | Son | — | 17 | ~1923 |
| Robert Olson | Son | — | 19 | ~1921 |
| Carl Olson | Head | — | 50 | ~1890 |
| Vernon Olson | Son | — | 15 | ~1925 |
| Richard Olson | Son | — | 6 | ~1934 |
| Edna Olson | Spouse | — | 49 | ~1891 |
Census Appearances
1930
Minnehaha, South …
Son, age 9
Minnehaha, South Dakota · implied b. ~1921 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Olson |
| Given Name | Robert W. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | South Dakota |
| Father's Birthplace | Norway |
| Mother's Birthplace | South Dakota |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
1940
Minnehaha-County, South …
Son, age 19
Minnehaha-County, South Dakota · implied b. ~1921 — 8 household members
| Surname | Olson |
| Given Name | Robert W |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | South Dakota |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Minnehaha |
| Occupation | Hired Hand |
| Industry | Agriculture |
| Class of Worker | PW |
| Hours Worked | 50 |
| Income (1939) | 240 |
| Highest Grade | H 4 |
| 1935 Residence | South Dakota |
| 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 Robert Olson across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Robert Olson
Son · 1940 · age 19 · b. ~1921 · South Dakota
★ You are viewing this record
Sibling
Quentin Olson
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joyce Olson
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Vernon Olson
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Olson
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alan Olson
Sibling · 1940 · age 10
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 — Minnehaha-County, South Dakota
Open full size
1940 US Federal Census — Minnehaha-County, South Dakota
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03863-00354)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Harold E Kellogg | 38 | Head | Farmer | South Dakota |
| 2 | Mary A Kellogg | 35 | Wife | — | Minnesota |
| 3 | Barbara J Kellogg | 13 | Daughter | — | South Dakota |
| 4 | Anne E Kellogg | 10 | Daughter | — | South Dakota |
| 5 | Emil V Danielson | 43 | Head | Farmer | Sweden |
| 6 | Tilda J Danielson | 40 | Wife | — | Minnesota |
| 7 | Audrey J Danielson | 19 | Daughter | — | South Dakota |
| 8 | Arval V Danielson | 15 | Son | — | South Dakota |
| 9 | Eldon M Danielson | 11 | Son | — | South Dakota |
| 10 | Anton Nielsen | 31 | Head | Farmer | Iowa |
| 11 | Thelma O Nielsen | 25 | Wife | — | South Dakota |
| 12 | Munce Duane H Nielsen | 14 | Nephew | — | South Dakota |
| 13 | Carl A Olson | 50 | Head | Farmer | Norway |
| 14 | Edna A Olson | 49 | Wife | — | South Dakota |
| 15 | Robert W Olson THIS PERSON | 19 | Son | Hired Hand | South Dakota |
| 16 | Quentin E Olson | 17 | Son | Hired Hand | South Dakota |
| 17 | Vernon C Olson | 15 | Son | — | South Dakota |
| 18 | Joyce G Olson | 13 | Daughter | — | South Dakota |
| 19 | Alan E Olson | 10 | Son | — | South Dakota |
| 20 | Richard L Olson | 6 | Son | — | South Dakota |
| 21 | Howard E Nelson | 40 | Head | Farmer | South Dakota |
| 22 | Agnes L Nelson | 37 | Wife | — | Sweden |
| 23 | Sam E Hovnesh|Hovresh | 65 | Head | Farmer | South Dakota |
| 24 | Susan G Hovnesh|Hovresh | 57 | Wife | — | Minnesota |
| 25 | Wilma Hovnesh|Hovresh | 21 | Daughter | — | South Dakota |
| 26 | Harold Venamas | 41 | Hired Hand | Hired Hand | South Dakota |
| 27 | Olaf Anderson | 59 | Head | Farmer | Sweden |
| 28 | Mary Anderson | 55 | Wife | — | Minnesota |
| 29 | Atis N Anderson | 15 | Son | — | South Dakota |
| 30 | John M Hithoven|Withoven | 41 | Head | Farmer | Holland |
| 31 | Jennie Hithoven|Withoven | 32 | Wife | — | Holland |
| 32 | Markus J Hithoven|Withoven | 9 | Son | — | South Dakota |
| 33 | Dick L Hithoven|Withoven | 1 | Son | — | South Dakota |
| 34 | Markus Hithoven|Withoven | 72 | Father | — | Holland |
| 35 | Clazina Hithoven|Withoven | 67 | Mother | — | Holland |
| 36 | Otto J Swenson | 31 | Head | Farmer | Minnesota |
| 37 | Sylvia B Swenson | 32 | Wife | — | South Dakota |
| 38 | Dennis A Swenson | 8 | Son | — | South Dakota |
| 39 | Arden A Swenson | 6 | Son | — | South Dakota |
| 40 | Maurine G Swenson | 4 | 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)