WM
William Mason — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Perkins-County, South Dakota
Our Model Tree links this William Mason across the 1920, 1930 and 1940 US Censuses in Perkins-County, South Dakota (XGBoost, ~Confirmed) — first a head (b.~1879), then head of a 4-person household.
Age 61
b. ~1879
Male
Head
Born: England
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Perkins-County, South Dakota |
| Surname | Mason |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 61 |
| Marital Status | Married |
| Birthplace | England |
| 1935 Residence (City) | Deep Creek Township |
| 1935 Residence (County) | Perkins |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 45 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth Country | England |
| Birthplace (normalized) | england |
| Occupation | Farmer |
| Township / Ward | Deep Creek Township |
| Est. Birth Year | ~1879 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| William Mason | Head | — | 61 | ~1879 |
| Ronald Mason | Son | — | 27 | ~1913 |
| Tom Mason | Son | — | 23 | ~1917 |
| Edith Mason | Spouse | — | 63 | ~1877 |
Census Appearances
1920
Perkins, South …
Head, age 40
Perkins, South Dakota · implied b. ~1880
●
Primary link
· ~Confirmed · 1 source
XGBoost
| Surname | Mason |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | England |
| Year of Immigration | 1900 |
| Naturalization Status | First papers filed |
| Father's Birthplace | England |
| Mother's Birthplace | England |
| Occupation | Farmer |
| Industry | General farm |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Home Owned/Rented | O |
| Home Free/Mortgaged | M |
| Birth Country | England |
| Birthplace (normalized) | england |
1930
Perkins, South …
Head, age 50
Perkins, South Dakota · implied b. ~1880 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mason |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | England |
| Naturalization Status | Naturalized |
| Year of Immigration | 1900 |
| Age at First Marriage | 27 |
| Father's Birthplace | England |
| Mother's Birthplace | England |
| Occupation | Farmer |
| Industry | General farming |
| Class of Worker | VVVV |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | O |
| Birth Country | England |
| Birthplace (normalized) | england |
1940
Perkins-County, South …
Head, age 61
Perkins-County, South Dakota · implied b. ~1879 — 4 household members
| Surname | Mason |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 61 |
| Marital Status | Married |
| Birthplace | England |
| 1935 Residence (City) | Deep Creek Township |
| 1935 Residence (County) | Perkins |
| Naturalization Status | Naturalized |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 45 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth Country | England |
| Birthplace (normalized) | england |
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 Mason 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 Mason
Head · 1940 · age 61 · b. ~1879 · South 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 — Perkins-County, South Dakota
Open full size
1940 US Federal Census — Perkins-County, South Dakota
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03866-00063)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Laurence S. Cochran | 38 | Head | Farmer | Iowa |
| 2 | Laura Cochran | 42 | Wife | Housekeeper | Illinois |
| 3 | Verla Cochran | 7 | Daughter | — | S. Dakota |
| 4 | Earl Cochran | 5 | Son | — | S. Dakota |
| 5 | James Yates | 23 | Head | Laborer | S. Dakota |
| 6 | Wayne Yates | 17 | Son | Laborer | S. Dakota |
| 7 | Margie Yates | 14 | Daughter | — | S. Dakota |
| 8 | Ethel Yates | 13 | Daughter | — | S. Dakota |
| 9 | James Alderson | 78 | Father in L | — | N. Dakota |
| 10 | Troy Conger | 34 | Head | Farmer | S. Dakota |
| 11 | Elizabeth Conger | 38 | Wife | Housekeeper | S. Dakota |
| 12 | Albert Conger | 11 | Son | — | S. Dakota |
| 13 | Lavonne Conger | 9 | Daughter | — | S. Dakota |
| 14 | Ardeth Conger | 7 | Daughter | — | S. Dakota |
| 15 | Jacqueline Conger | 4 | Daughter | — | S. Dakota |
| 16 | Stephan Horswell | 47 | Head | Farmer | Indiana |
| 17 | Chas Gruber | 64 | Head | Farmer | Indiana |
| 18 | Bessie Gruber | 59 | Wife | Housekeeper | Missouri |
| 19 | Tom Gruber | 26 | Son | Farmer | S. Dakota |
| 20 | Clarice Gruber | 21 | Daughter | Housekeeper | S. Dakota |
| 21 | Ada Gruber | 18 | Daughter | — | S. Dakota |
| 22 | Naomi Smith | 64 | Head | Housekeeper | Iowa |
| 23 | James Smith | 34 | Son | Farmer | S. Dakota |
| 24 | Glenn Smith | 21 | Son | — | Nebraska |
| 25 | William Mason THIS PERSON | 61 | Head | Farmer | England |
| 26 | Edith Mason | 63 | Wife | Housekeeper | England |
| 27 | Tom Mason | 23 | Son | Laborer | S. Dakota |
| 28 | Ronald Mason | 27 | Son | Laborer | S. Dakota |
| 29 | John Shade | 52 | Head | Farmer | Pennsylvania |
| 30 | Hannah Shade | 67 | Wife | Housekeeper | Canada |
| 31 | Carl Ruse | 41 | Head | Farmer | Nebraska |
| 32 | Hatt Edd Hall | 52 | Head | Farmer | New York |
| 33 | Elsie Hall | 31 | Wife | Housekeeper | S. Dakota |
| 34 | Mary May Hall | 1 | Daughter | — | S. Dakota |
| 35 | Carl Giesler | 51 | Head | Farmer | Germany |
| 36 | Ella Giesler | 48 | Wife | Housekeeper | Iowa |
| 37 | Carl Giesler | 22 | Son | Farmer | Iowa |
| 38 | Elizabeth Giesler | 18 | Daughter | Housekeeper | Iowa |
| 39 | Dolores Giesler | 14 | Son | — | Iowa |
| 40 | John Giesler | 12 | Son | — | Iowa |
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)