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John Carlson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Marshall-County, South Dakota
Our Model Tree links this John Carlson across the 1920, 1930 and 1940 US Censuses in Marshall-County, South Dakota (XGBoost, ~Confirmed) — first a head (b.~1888), then head of a 5-person household.
Age 52
b. ~1888
Male
Head
Born: Sweden
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Marshall-County, South Dakota |
| Surname | Carlson |
| Given Name | John W |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Sweden |
| 1935 Residence (City) | Sisseton |
| 1935 Residence (County) | Marshall |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 70 |
| Income (1939) | 0 |
| Highest Grade | 6 |
| 1935 Residence | Same place |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
| Occupation | Farmer |
| Township / Ward | Sisseton |
| Est. Birth Year | ~1888 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Josephine Thompson | Daughter | — | 20 | ~1920 |
| John Carlson | Head | — | 52 | ~1888 |
| Leonard Thompson | Other | — | 32 | ~1908 |
| Kenneth Carlson | Son | — | 11 | ~1929 |
| Julia Carlson | Spouse | — | 49 | ~1891 |
Census Appearances
1920
Marshall, South …
Head, age 32
Marshall, South Dakota · implied b. ~1888 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carlson |
| Given Name | John W. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Sweden |
| Year of Immigration | 1888 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Farmer |
| Industry | General farm |
| Class of Worker | Em |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Swedish |
| Home Owned/Rented | R |
| Birth Country | Sweden |
| Year of Naturalization | 1894 |
| Birthplace (normalized) | sweden |
1930
Marshall, South …
Head, age 43
Marshall, South Dakota · implied b. ~1887 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carlson |
| Given Name | John W. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 43 |
| Marital Status | Married |
| Birthplace | Sweden |
| Naturalization Status | Naturalized |
| Year of Immigration | 1889 |
| Age at First Marriage | 30 |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Mother Tongue | Swedish |
| Home Owned/Rented | O |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
1940
Marshall-County, South …
Head, age 52
Marshall-County, South Dakota · implied b. ~1888 — 5 household members
| Surname | Carlson |
| Given Name | John W |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Sweden |
| 1935 Residence (City) | Sisseton |
| 1935 Residence (County) | Marshall |
| Naturalization Status | Naturalized |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 70 |
| Income (1939) | 0 |
| Highest Grade | 6 |
| 1935 Residence | Same place |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
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 John Carlson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Carlson
Head · 1940 · age 52 · b. ~1888 · South Dakota
★ 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, South Dakota
Open full size
1940 US Federal Census — Marshall-County, South Dakota
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03861-01080)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Kenneth Jr Ogran | 18 | Son | Farmer | So Dak |
| 42 | Kathryn Ogran | 16 | Daughter | — | So Dak |
| 43 | August Falk | 52 | Hired hand | Farm Hand | Sweden |
| 44 | John W Carlson THIS PERSON | 52 | Head | Farmer | Sweden |
| 45 | Julia Carlson | 49 | Wife | — | So Dak |
| 46 | Kenneth Carlson | 11 | Son | — | So Dak |
| 47 | Leonard Thompson | 32 | Hired hand | Farm Hand | So Dak |
| 48 | Josephine Thompson | 20 | Daughter | — | So Dak |
| 49 | Elmer H Johnson | 31 | Head | Wpa | So Dak |
| 50 | Elva C Johnson | 29 | Wife | — | So Dak |
| 51 | Ivan L Johnson | 4 | Son | — | So Dak |
| 52 | Carl E Johnson | 2 | Daughter | — | So Dak |
| 53 | Rose Ab Hoveland | 26 | Sister in law | — | So Dak |
| 54 | Eingvald Syverson | 49 | Head | Farmer | Minnesota |
| 55 | Ester Syverson | 47 | Wife | — | So Dak |
| 56 | Edward Syverson | 37 | Brother | Farmer | Minnesota |
| 57 | Carl Nickelson | 77 | Head | Farmer | Sweden |
| 58 | Sena Nickelson | 67 | Wife | — | Denmark |
| 59 | Clarence E Nickelson | 34 | Son | Farmer | So Dak |
| 60 | Josephine Nickelson | 33 | Daughter | — | So Dak |
| 61 | Francis Nickelson | 21 | Daughter | — | So Dak |
| 62 | Alfred Haines | 37 | Head | Farmer | So Dak |
| 63 | Annie Haines | 27 | Wife | — | So Dak |
| 64 | Phillip Haines | 9 | Son | — | So Dak |
| 65 | Donald Haines | 8 | Son | — | So Dak |
| 66 | Ardis Haines | 5 | Daughter | — | So Dak |
| 67 | Alford Nelson | 75 | Head | Farmer | Sweden |
| 68 | Lotty Nelson | 73 | Wife | — | Sweden |
| 69 | Charles E Nelson | 50 | Son | Farm Hand | So Dak |
| 70 | Severin Carlson | 43 | Head | Farmer | So Dak |
| 71 | Ester Carlson | 23 | Wife | House Keeper | So Dak |
| 72 | Muriel Carlson | 15 | Daughter | — | So Dak |
| 73 | Andrew S Jensen | 59 | Head | Farmer | Minnesota |
| 74 | Anna C Jensen | 58 | Wife | — | Denmark |
| 75 | Francis A Jensen | 29 | Daughter | Teacher | So Dak |
| 76 | Isabelle N Jensen | 24 | Daughter | — | So Dak |
| 77 | Clifford J Jensen | 21 | Son | Farmer | So Dak |
| 78 | Edward A Janson | 60 | Head | Farmer | So Dak |
| 79 | Linnie Janson | 45 | Sister | — | So Dak |
| 80 | Ernest D Janson | 41 | Brother | Farmer | So Dak |
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)