RE
Ruth Ellis — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Charles-Mix-County, South Dakota
Our Model Tree links this Ruth Ellis across the 1930 and 1940 US Censuses in Charles-Mix-County, South Dakota (XGBoost, ~Confirmed) — first a daughter (b.~1926), then head of a 7-person household.
Age 14
b. ~1926
Female
Daughter
Born: South Dakota
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Charles-Mix-County, South Dakota |
| Surname | Ellis |
| Given Name | Ruth |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | South Dakota |
| 1935 Residence (City) | La Roche Township |
| 1935 Residence (County) | Charles Mix |
| Additional Details | |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
| Township / Ward | La Roche Township |
| Est. Birth Year | ~1926 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Ruth | Age | Birth yr |
|---|---|---|---|---|
| Frank Ellis | Head | — | 50 | ~1890 |
| Eleanor Ellis | Daughter | — | 3 | ~1937 |
| Ruth Ellis | Daughter | — | 14 | ~1926 |
| Betty Ellis | Daughter | — | 7 | ~1933 |
| Donald Ellis | Son | — | 12 | ~1928 |
| Sarah Ellis | Spouse | — | 45 | ~1895 |
| Lucille Ellis | Daughter | — | 18 | ~1922 |
Census Appearances
1930
Charles Mix, …
Daughter, age 4
Charles Mix, South Dakota · implied b. ~1926 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Ellis |
| Given Name | Ruth D. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | South Dakota |
| Father's Birthplace | South Dakota |
| Mother's Birthplace | South Dakota |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
1940
Charles-Mix-County, South …
Daughter, age 14
Charles-Mix-County, South Dakota · implied b. ~1926 — 7 household members
| Surname | Ellis |
| Given Name | Ruth |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | South Dakota |
| 1935 Residence (City) | La Roche Township |
| 1935 Residence (County) | Charles Mix |
| Highest Grade | No 8 |
| 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 Ruth Ellis across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Ruth Ellis
Daughter · 1940 · age 14 · b. ~1926 · South Dakota
★ You are viewing this record
Sibling
Eleanor Ellis
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lucille Ellis
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Donald Ellis
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Betty Ellis
Sibling · 1940 · age 7
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 — Charles-Mix-County, South Dakota
Open full size
1940 US Federal Census — Charles-Mix-County, South Dakota
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03851-00193)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | William Olson | 44 | Head | Farmer | South Dakota |
| 2 | Ethel @ Olson | 46 | Wife | — | South Dakota |
| 3 | Olga (Ab) Olson | 17 | daughter | — | South Dakota |
| 4 | Delwyn Olson | 16 | son | — | South Dakota |
| 5 | John Pike | 54 | Head | Farmer | Iowa |
| 6 | Emma @ Pike | 47 | Wife | — | Pennsylvania |
| 7 | Rose (Ab) Pike | 18 | daughter | Student | South Dakota |
| 8 | Harold Pike | 12 | son | — | South Dakota |
| 9 | Marlowe @ Lloyd | 28 | Head | Farmer | South Dakota |
| 10 | Delores Lloyd | 20 | wife | — | South Dakota |
| 11 | Lee Lloyd | 2 | son | — | South Dakota |
| 12 | Frank @ Ellis | 50 | Head | Farmer | South Dakota |
| 13 | Sarah Ellis | 45 | wife | — | South Dakota |
| 14 | Lucille (Ab) Ellis | 18 | daughter | Domestic Servant | South Dakota |
| 15 | Ruth Ellis THIS PERSON | 14 | daughter | — | South Dakota |
| 16 | Donald Ellis | 12 | son | — | South Dakota |
| 17 | Betty Ellis | 7 | daughter | — | South Dakota |
| 18 | Eleanor Ellis | 3 | daughter | — | South Dakota |
| 19 | Virtus Boock | 49 | Head | Farmer | Iowa |
| 20 | Dena @ Boock | 52 | wife | — | South Dakota |
| 21 | Ray Buchtel | 22 | son | Farm Laborer | South Dakota |
| 22 | Adler @ Tungsvik | 50 | Head | Farmer | South Dakota |
| 23 | Derange Tungsvik | 75 | mother | — | Canada-French |
| 24 | Seraphine Tungsvik | 19 | nephew | — | South Dakota |
| 25 | John Ham | 62 | Head | Farmer | South Dakota |
| 26 | Carrie Ham | 66 | sister | — | South Dakota |
| 27 | Jennie Ham | 54 | sister | — | South Dakota |
| 28 | Allen Delany | 56 | Head | Farmer | Pennsylvania |
| 29 | Ruth @ Delany | 44 | wife | — | Iowa |
| 30 | Grace Delany | 23 | daughter | Laborer | South Dakota |
| 31 | Adeline Delany | 21 | daughter | Farm Laborer | South Dakota |
| 32 | Iola Delany | 19 | daughter | — | South Dakota |
| 33 | Robert Delany | 13 | son | — | South Dakota |
| 34 | Betty Delany | 10 | daughter | — | South Dakota |
| 35 | Aldena Delany | 7 | daughter | — | South Dakota |
| 36 | Bennie Delany | 4 | son | — | South Dakota |
| 37 | Albert Delany | 2 | son | — | South Dakota |
| 38 | Oscar Paul | 62 | Head | Farm Laborer | Iowa |
| 39 | Ray Norman | 38 | Head | Farmer | Nebraska |
| 40 | Nellie Norman | 36 | wife | — | South 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)