WC
William Carlson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Ward-County, North Dakota
Our Model Tree links this William Carlson across the 1920, 1930 and 1940 US Censuses in Ward-County, North Dakota (XGBoost, ~Confirmed) — first a head (b.~1878), then head of a 5-person household.
Age 62
b. ~1878
Male
Head
Born: Sweden
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Ward-County, North Dakota |
| Surname | Carlson |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 62 |
| Marital Status | Married |
| Birthplace | Sweden |
| 1935 Residence (City) | Margaret township |
| 1935 Residence (County) | Ward |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | farmer |
| Industry | farm |
| Class of Worker | OA |
| Hours Worked | 70 |
| Income (1939) | 0 |
| Highest Grade | no 8 |
| 1935 Residence | Same place |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
| Occupation | Farmer |
| Township / Ward | Margaret Township |
| Est. Birth Year | ~1878 |
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 William | Age | Birth yr |
|---|---|---|---|---|
| Bertha Carlson | Spouse | — | 56 | ~1884 |
| Ellert Carlson | Son | — | 24 | ~1916 |
| Melvin Carlson | Son | — | 16 | ~1924 |
| William Carlson | Head | — | 62 | ~1878 |
| Vernon Carlson | Son | — | 20 | ~1920 |
Census Appearances
1920
Ward, North …
Head, age 42
Ward, North Dakota · implied b. ~1878 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carlson |
| Given Name | William E |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Sweden |
| Year of Immigration | 1880 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | farmer |
| Industry | general farm |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Swedish |
| Home Owned/Rented | O |
| Home Free/Mortgaged | M |
| Birth Country | Sweden |
| Year of Naturalization | 1885 |
| Birthplace (normalized) | sweden |
1930
Ward, North …
Head, age 52
Ward, North Dakota · implied b. ~1878 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carlson |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Sweden |
| Naturalization Status | Naturalized |
| Year of Immigration | 1879 |
| Age at First Marriage | 32 |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Farmer |
| Industry | Grain farm |
| Class of Worker | E |
| Can Read/Write | Yes |
| Mother Tongue | Swedish |
| Home Owned/Rented | O |
| Veteran | No |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
1940
Ward-County, North …
Head, age 62
Ward-County, North Dakota · implied b. ~1878 — 5 household members
| Surname | Carlson |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 62 |
| Marital Status | Married |
| Birthplace | Sweden |
| 1935 Residence (City) | Margaret township |
| 1935 Residence (County) | Ward |
| Naturalization Status | Naturalized |
| Occupation | farmer |
| Industry | farm |
| Class of Worker | OA |
| Hours Worked | 70 |
| Income (1939) | 0 |
| Highest Grade | no 8 |
| 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 William 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
William Carlson
Head · 1940 · age 62 · b. ~1878 · North 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 — Ward-County, North Dakota
Open full size
1940 US Federal Census — Ward-County, North Dakota
Page Contents
38 people indexed on this census page (nara:1940:m-t0627-03017-00344)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Lewis D. Hall | 58 | Head | Farmer | Minnesota |
| 2 | Alma Hall | 55 | Wife | — | South Dakota |
| 3 | Vincent Anderson | 25 | Hired hand | Farm Laborer | South Dakota |
| 4 | John Hollinger | 66 | Head | — | France |
| 5 | Aileen Hollinger | 17 | Daughter | — | North Dakota |
| 6 | Genevieve Hollinger | 11 | Daughter | — | North Dakota |
| 7 | Donna Hollinger | 6 | Daughter | — | North Dakota |
| 8 | Marlene Hollinger | 5 | Daughter | — | North Dakota |
| 9 | Olaf Hanson | 40 | Head | Farmer | Norway |
| 10 | Aline Hanson | 35 | Wife | — | North Dakota |
| 11 | Hazel Hanson | 14 | Daughter | — | North Dakota |
| 12 | Myron Hanson | 12 | Son | — | North Dakota |
| 13 | Dale Hanson | 5 | Son | — | North Dakota |
| 14 | Eldon Hanson | 3 | Son | — | North Dakota |
| 15 | Glen Hanson | 1 | Son | — | North Dakota |
| 16 | Ernest Carlson | 35 | Head | Laborer | Massachusetts |
| 17 | Agnes Carlson | 31 | Wife | — | North Dakota |
| 18 | Wallace Carlson | 11 | Son | — | North Dakota |
| 19 | Earnest Jr. Carlson | 10 | Son | — | North Dakota |
| 20 | Alma Carlson | 8 | Daughter | — | North Dakota |
| 21 | Charlotte Carlson | 5 | Daughter | — | North Dakota |
| 22 | Gordon Carlson | 3 | Son | — | North Dakota |
| 23 | Mae Reiste | 56 | Head | — | Iowa |
| 24 | William Reiste | 13 | Son | — | North Dakota |
| 25 | William Carlson THIS PERSON | 62 | Head | Farmer | Sweden |
| 26 | Bertha Carlson | 56 | Wife | — | Wisconsin |
| 27 | Ellert Ab Carlson | 24 | Son | Farm Laborer | North Dakota |
| 28 | Vernon Carlson | 20 | Son | Farm Laborer | North Dakota |
| 29 | Melvin Carlson | 16 | Son | — | North Dakota |
| 30 | Edward Pfeiffer | 49 | Head | Farmer | Minnesota |
| 31 | Sophie Pfeiffer | 51 | Wife | — | Minnesota |
| 32 | Berget Ab Pfeiffer | 21 | Daughter | — | North Dakota |
| 33 | Vera Pfeiffer | 19 | Daughter | Maid | North Dakota |
| 34 | Venetta Pfeiffer | 17 | Daughter | Stenographer | North Dakota |
| 35 | Sylvester Pfeiffer | 15 | Son | — | North Dakota |
| 36 | Sylvia Pfeiffer | 15 | Daughter | — | North Dakota |
| 37 | Maynard Grilley | 44 | Head | Farmer | Wisconsin |
| 38 | Violet Grilley | 31 | Wife | — | North 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)