RS
Roger Smith — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Lincoln-County, South Dakota
Our Model Tree links this Roger Smith across the 1930 and 1940 US Censuses in Lincoln-County, South Dakota (XGBoost, ~Confirmed) — first a son (b.~1923), then head of a 6-person household.
Age 17
b. ~1923
Male
Son
Born: South Dakota
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Lincoln-County, South Dakota |
| Surname | Smith |
| Given Name | Roger A |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | South Dakota |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Lincoln |
| Additional Details | |
| Highest Grade | Hs 3 |
| 1935 Residence | South Dakota |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
| Township / Ward | Hudson |
| Est. Birth Year | ~1923 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Roger | Age | Birth yr |
|---|---|---|---|---|
| Roger Smith | Son | — | 17 | ~1923 |
| Gordon Smith | Son | — | 22 | ~1918 |
| Raymond Smith | Son | — | 12 | ~1928 |
| Porter Smith | Head | — | 46 | ~1894 |
| Mabel Smith | Spouse | — | 45 | ~1895 |
| Gilbert Smith | Son | — | 20 | ~1920 |
Census Appearances
1930
Lincoln, South …
Son, age 7
Lincoln, South Dakota · implied b. ~1923 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | Roger |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | South Dakota |
| Father's Birthplace | South Dakota |
| Mother's Birthplace | Iowa |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
1940
Lincoln-County, South …
Son, age 17
Lincoln-County, South Dakota · implied b. ~1923 — 6 household members
| Surname | Smith |
| Given Name | Roger A |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | South Dakota |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Lincoln |
| Highest Grade | Hs 3 |
| 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 Roger Smith across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Roger Smith
Son · 1940 · age 17 · b. ~1923 · South Dakota
★ You are viewing this record
Sibling
Raymond Smith
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gilbert Smith
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gordon Smith
Sibling · 1940 · age 22
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 — Lincoln-County, South Dakota
Open full size
1940 US Federal Census — Lincoln-County, South Dakota
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03860-00844)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Velma J Mcvay | 17 | Daughter | — | South Dakota |
| 42 | Lyle Marshall | 38 | Head | Barber | Iowa |
| 43 | Henrietta Marshall | 38 | Wife | Chicken Ranch | Iowa |
| 44 | Kendell D Marshall | 13 | Son | — | South Dakota |
| 45 | Bervilla J Marshall | 11 | Daughter | — | South Dakota |
| 46 | Lavon J Marshall | 10 | Daughter | — | South Dakota |
| 47 | Dorothy Smith | 26 | Keeper | Housekeeper | South Dakota |
| 48 | Carl Ed Smucken | 49 | Head | Produce Dealer | Iowa |
| 49 | Eleanor A Smucken | 47 | Wife | Produce | Nebraska |
| 50 | Son Hilton | 27 | Son | Laborer | Iowa |
| 51 | Daughter Nethie | None | F | — | — |
| 52 | Son Jimmie | 6 | Son | — | South Dakota |
| 53 | Elmer N Torkelson | 39 | Head | General Merchant | South Dakota |
| 54 | Mabel Torkelson | 33 | Wife | Saleslady | South Dakota |
| 55 | Porter H Smith | 46 | Head | Patrolman | South Dakota |
| 56 | Mabel C Smith | 45 | Wife | — | Iowa |
| 57 | Gordon E Smith | 22 | Son | Salesman | South Dakota |
| 58 | Gilbert P Smith | 20 | Son | Salesman | South Dakota |
| 59 | Roger A Smith THIS PERSON | 17 | Son | — | South Dakota |
| 60 | Raymond J Smith | 12 | Son | — | Iowa |
| 61 | Mae Terrie | 69 | Head | — | Iowa |
| 62 | Helmer P Nelson | 47 | Head | Manager | Sweden |
| 63 | Mayme M Nelson | 41 | Wife | — | Iowa |
| 64 | Arthur R Buckwalter | 39 | Head | Merchant | Iowa |
| 65 | Anne C Buckwalter | 34 | Wife | Saleslady | South Dakota |
| 66 | Darlo R Buckwalter | 9 | Son | — | South Dakota |
| 67 | Cora Tosh | 30 | Keeper | Housekeeper | Iowa |
| 68 | Oscar Loe | 44 | Head | Guard | South Dakota |
| 69 | Ida L Loe | 41 | Wife | — | South Dakota |
| 70 | Oscar R Loe | 7 | Son | — | Iowa |
| 71 | Ida O Loe | 7 | Daughter | — | Iowa |
| 72 | Eldon C Loe | 3 | Son | — | Iowa |
| 73 | George H Marshall | 74 | Head | — | Illinois |
| 74 | Ruth A Marshall | 62 | Wife | — | Michigan |
| 75 | George Coates | 71 | Head | Truck Gardener | England |
| 76 | Francis Villier | 71 | Head | Truck Gardener | Iowa |
| 77 | Fannie B Villier | 72 | Wife | — | Iowa |
| 78 | John E Quarnstrom | 56 | Head | Recreation | Sweden |
| 79 | Emma C Quarnstrom | 51 | Wife | — | Sweden |
| 80 | Ruth E Quarnstrom | 19 | Daughter | Secretary + General Clerk | 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)