MO
Mary Olson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Miner-County, South Dakota
Our Model Tree links this Mary Olson across the 1920, 1930 and 1940 US Censuses in Miner-County, South Dakota (XGBoost, ~Confirmed) — first a spouse (b.~1861), then head of a 3-person household.
Age 79
b. ~1861
Female
Spouse
Born: Denmark
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Miner-County, South Dakota |
| Surname | Olson |
| Given Name | Mary |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 79 |
| Marital Status | Married |
| Birthplace | Denmark |
| 1935 Residence (City) | Howard City |
| 1935 Residence (County) | Miner |
| Naturalization Status | Naturalized |
| Additional Details | |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth Country | Denmark |
| Birthplace (normalized) | denmark |
| Township / Ward | Howard City |
| Est. Birth Year | ~1861 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Olson | Spouse | — | 79 | ~1861 |
| Peter Olson | Head | — | 77 | ~1863 |
| Elmer Olson | Son | — | 36 | ~1904 |
Census Appearances
1920
Miner, South …
Spouse, age 58
Miner, South Dakota · implied b. ~1862 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Olson |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 58 |
| Marital Status | Married |
| Birthplace | Denmark |
| Year of Immigration | 1881 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Denmark |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Danish |
| Birth Country | Denmark |
| Year of Naturalization | 1887 |
| Birthplace (normalized) | denmark |
1930
Miner, South …
Other, age 68
Miner, South Dakota · implied b. ~1862 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Olson |
| Given Name | Mary |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 68 |
| Marital Status | Married |
| Birthplace | Denmark |
| Naturalization Status | Alien |
| Year of Immigration | 1886 |
| Age at First Marriage | 27 |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Denmark |
| Can Read/Write | Yes |
| Mother Tongue | Danish |
| Birth Country | Denmark |
| Birthplace (normalized) | denmark |
1940
Miner-County, South …
Spouse, age 79
Miner-County, South Dakota · implied b. ~1861 — 3 household members
| Surname | Olson |
| Given Name | Mary |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 79 |
| Marital Status | Married |
| Birthplace | Denmark |
| 1935 Residence (City) | Howard City |
| 1935 Residence (County) | Miner |
| Naturalization Status | Naturalized |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth Country | Denmark |
| Birthplace (normalized) | denmark |
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 Mary Olson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Olson
Spouse · 1940 · age 79 · b. ~1861 · 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 — Miner-County, South Dakota
Open full size
1940 US Federal Census — Miner-County, South Dakota
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03862-00824)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John T Johnson | 65 | Head | Implement Dealer | Minnesota |
| 2 | Anna Johnson | 54 | Wife | Housekeeper | South Dakota |
| 3 | William Klein | 43 | Head | Owner | South Dakota |
| 4 | Rosell Klein | 39 | Wife | — | Iowa |
| 5 | Marie Klein | 15 | daughter | — | South Dakota |
| 6 | Thomas Klein | 11 | son | — | South Dakota |
| 7 | Janet Klein | 8 | daughter | — | South Dakota |
| 8 | Raymond Goold | 50 | Head | Mail Carrier | South Dakota |
| 9 | Anna Goold | 54 | wife | — | South Dakota |
| 10 | Betsey Hogdahl | 85 | mother-in-law | — | Norway |
| 11 | Arnold Bell | 24 | lodger | Teacher | Iowa |
| 12 | John J. Adkins | 77 | Head | — | Wisconsin |
| 13 | Hattie Adkins | 77 | wife | — | Iowa |
| 14 | Claude Ravion | 40 | Head | — | Iowa |
| 15 | Agnes Ravion | 40 | wife | — | South Dakota |
| 16 | Donald Ravion | 19 | son | — | South Dakota |
| 17 | Jean Ravion | 16 | daughter | — | South Dakota |
| 18 | Richard Ravion | 12 | son | — | South Dakota |
| 19 | Willard Henden | 22 | Head | Laborer | South Dakota |
| 20 | Emelyn Henden | 23 | wife | — | South Dakota |
| 21 | Janice Henden | 0 | daughter | — | South Dakota |
| 22 | Dale Powell | 34 | Head | Salesman | South Dakota |
| 23 | Lou Powell | 33 | wife | — | South Dakota |
| 24 | Elizabeth Powell | 5 | daughter | — | South Dakota |
| 25 | William Beeck | 35 | Head | Janitor | Iowa |
| 26 | Hazel Beeck | 29 | wife | — | South Dakota |
| 27 | Willa Beeck | 9 | daughter | — | South Dakota |
| 28 | Robert A. Abrahamson | 68 | Head | — | Wisconsin |
| 29 | Inga A. Abrahamson | 73 | wife | — | Norway |
| 30 | Grace H. Abrahamson | 39 | daughter | — | South Dakota |
| 31 | Peter Olson | 77 | Head | — | Denmark |
| 32 | Mary Olson THIS PERSON | 79 | wife | — | Denmark |
| 33 | Elmer Olson | 36 | son | Owner | South Dakota |
| 34 | John Esser | 77 | Head | — | Wisconsin |
| 35 | Katherine Esser | 68 | wife | — | Wisconsin |
| 36 | Mary Esser | 44 | daughter | Owner | Iowa |
| 37 | Esther Esser | 37 | daughter | Waitress | South Dakota |
| 38 | Edwin Prebble | 91 | Head | — | England |
| 39 | Mary Prebble | 75 | wife | — | England |
| 40 | Robert Prebble | 40 | son | Clerk | 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)