LM
Lois Martin — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Ziebach-County, South Dakota
Our Model Tree links this Lois Martin across the 1930 and 1940 US Censuses in Ziebach-County, South Dakota (XGBoost, ~Confirmed) — first a daughter (b.~1928), then head of a 10-person household.
Age 12
b. ~1928
Female
Daughter
Born: South Dakota
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Ziebach-County, South Dakota |
| Surname | Martin |
| Given Name | Lois |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | South Dakota |
| 1935 Residence (City) | T 12 R 19 |
| 1935 Residence (County) | Ziebach |
| Additional Details | |
| Highest Grade | 5 |
| 1935 Residence | Same Place |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
| Township / Ward | T 12 R 19 |
| Est. Birth Year | ~1928 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Lois | Age | Birth yr |
|---|---|---|---|---|
| Floyd Martin | Son | — | ~1940 | |
| Vernie Martin | Son | — | 1 | ~1939 |
| Edna Martin | Spouse | — | 32 | ~1908 |
| Freda Martin | Daughter | — | 15 | ~1925 |
| Erchin Martin | Head | — | 33 | ~1907 |
| Jack Martin | Son | — | 5 | ~1935 |
| Edna Martin | Daughter | — | 13 | ~1927 |
| Della Martin | Daughter | — | 7 | ~1933 |
| Darrell Martin | Son | — | 2 | ~1938 |
| Lois Martin | Daughter | — | 12 | ~1928 |
Census Appearances
1930
Ziebach, South …
Daughter, age 2
Ziebach, South Dakota · implied b. ~1928 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | Louise |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | South Dakota |
| Father's Birthplace | Minnesota |
| Mother's Birthplace | South Dakota |
| Occupation | none |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
1940
Ziebach-County, South …
Daughter, age 12
Ziebach-County, South Dakota · implied b. ~1928 — 10 household members
| Surname | Martin |
| Given Name | Lois |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | South Dakota |
| 1935 Residence (City) | T 12 R 19 |
| 1935 Residence (County) | Ziebach |
| Highest Grade | 5 |
| 1935 Residence | Same Place |
| 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 Lois Martin across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Lois Martin
Daughter · 1940 · age 12 · b. ~1928 · South Dakota
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Sibling
Darrell Martin
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Della Martin
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Freda Martin
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edna Martin
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Vernie Martin
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jack Martin
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Floyd Martin
Sibling · 1940 · age
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 — Ziebach-County, South Dakota
Open full size
1940 US Federal Census — Ziebach-County, South Dakota
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03870-00634)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Hjalmar Ringeby | 52 | Head | Farmer | Norway |
| 2 | Anna Ringeby | 54 | Wife | — | South Dakota |
| 3 | Victor Ringeby | 18 | Son | Farmer | South Dakota |
| 4 | Hazel Ringeby | 14 | Daughter | — | South Dakota |
| 5 | Ross E. Vince | 40 | Head | Farmer | Iowa |
| 6 | Esther Vince | 32 | Wife | — | Wisconsin |
| 7 | Shannon Vince | 10 | Son | — | South Dakota |
| 8 | Gordon Vince | 8 | Son | — | South Dakota |
| 9 | Nyla Gene Vince | 6 | Daughter | — | South Dakota |
| 10 | Donald Vince | 4 | Son | — | South Dakota |
| 11 | Edward C. Armatrout | 56 | Head | Farmer | Ohio |
| 12 | Leona Johnson | 29 | Head | Teacher | South Dakota |
| 13 | Erchin A. Martin | 33 | Head | Farmer | Missouri |
| 14 | Edna Martin | 32 | Wife | — | South Dakota |
| 15 | Freda Martin | 15 | Daughter | — | South Dakota |
| 16 | Edna Martin | 13 | Daughter | — | South Dakota |
| 17 | Lois Martin THIS PERSON | 12 | Daughter | — | South Dakota |
| 18 | Della Mae Martin | 7 | Daughter | — | South Dakota |
| 19 | Jack Martin | 5 | Son | — | South Dakota |
| 20 | Darrell Martin | 2 | Son | — | South Dakota |
| 21 | Vernie Martin | 1 | Son | — | South Dakota |
| 22 | Floyd Martin | 0 | Son | — | South Dakota |
| 23 | Ludwig A. Smedsrud | 51 | Head | Farmer | Norway |
| 24 | Lillie Smedsrud | 40 | Wife | — | South Dakota |
| 25 | La Vonne Smedsrud | 17 | Daughter | — | South Dakota |
| 26 | Orville Smedsrud | 15 | Son | — | South Dakota |
| 27 | Louis Smedsrud | 12 | Son | — | South Dakota |
| 28 | Caryl Smedsrud | 10 | Daughter | — | South Dakota |
| 29 | Serena Smedsrud | 4 | Daughter | — | South Dakota |
| 30 | Fred G. Nelson | 48 | Head | Farmer | South Dakota |
| 31 | Neta Nelson | 46 | Wife | — | South Dakota |
| 32 | John C. Haagland | 53 | Head | Farmer | Nebraska |
| 33 | Lilah Haagland | 46 | Wife | — | Nebraska |
| 34 | Lewis Hancock | 41 | Head | Farmer | South Dakota |
| 35 | Thelma Hancock | 32 | Wife | — | Minnesota |
| 36 | Ralph Hancock | 16 | Son | — | North Dakota |
| 37 | Eugene H. Dull | 23 | Hired Hand | Hired Hand | Minnesota |
| 38 | Hiram H. Keith | 41 | Head | Teacher | South Dakota |
| 39 | George V. Sargent | 43 | Head | Farmer | Iowa |
| 40 | Blanche Sargent | 38 | Wife | — | Illinois |
Related Census Records
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)