IS
Ida Simmons — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Minnehaha-County, South Dakota
Our Model Tree links this Ida Simmons across the 1920, 1930 and 1940 US Censuses in Minnehaha-County, South Dakota (XGBoost, ~Confirmed) — first a spouse (b.~1895), then head of a 4-person household.
Age 45
b. ~1895
Female
Spouse
Born: South Dakota
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Minnehaha-County, South Dakota |
| Surname | Simmons |
| Given Name | Ida |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | South Dakota |
| 1935 Residence (City) | Sioux Falls City |
| 1935 Residence (County) | Minnehaha |
| Additional Details | |
| Occupation | Dental Assistant |
| Class of Worker | UP |
| Hours Worked | 48 |
| Income (1939) | 0 |
| Highest Grade | H-4 |
| 1935 Residence | Same House |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
| Occupation | Dental Assistant |
| Township / Ward | Sioux Falls City |
| Est. Birth Year | ~1895 |
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 Ida | Age | Birth yr |
|---|---|---|---|---|
| Ida Simmons | Spouse | — | 45 | ~1895 |
| Cordyn Simmons | Daughter | — | 16 | ~1924 |
| Corwin Simmons | Head | — | 50 | ~1890 |
| Jerome Simmons | Son | — | 9 | ~1931 |
Census Appearances
1920
Minnehaha, South …
Spouse, age 25
Minnehaha, South Dakota · implied b. ~1895 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Simmons |
| Given Name | Ida |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Married |
| Birthplace | South Dakota |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Assistant |
| Industry | Dentist Office |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Swedish |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
1930
Minnehaha, South …
Spouse, age 35
Minnehaha, South Dakota · implied b. ~1895 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Simmons |
| Given Name | Ida |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | South Dakota |
| Age at First Marriage | 24 |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Can Read/Write | Yes |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
1940
Minnehaha-County, South …
Spouse, age 45
Minnehaha-County, South Dakota · implied b. ~1895 — 4 household members
| Surname | Simmons |
| Given Name | Ida |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | South Dakota |
| 1935 Residence (City) | Sioux Falls City |
| 1935 Residence (County) | Minnehaha |
| Occupation | Dental Assistant |
| Class of Worker | UP |
| Hours Worked | 48 |
| Income (1939) | 0 |
| Highest Grade | H-4 |
| 1935 Residence | Same House |
| 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 Ida Simmons across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Ida Simmons
Spouse · 1940 · age 45 · b. ~1895 · 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 — Minnehaha-County, South Dakota
Open full size
1940 US Federal Census — Minnehaha-County, South Dakota
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03863-00662)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Dorothy Hooker | 23 | Wife | — | South Dakota |
| 2 | Kay E. Hooker | 1 | daughter | — | South Dakota |
| 3 | Glenn Hanson | 31 | Head | Laborer | South Dakota |
| 4 | Eda Hanson | 32 | Wife | Proprietress | Nebraska |
| 5 | Glenn Hanson | 9 | Son | — | Iowa |
| 6 | Donna Hanson | 7 | daughter | — | South Dakota |
| 7 | Lester Spalding | 52 | Head | Manager | Minnesota |
| 8 | Irene Spalding | 41 | Wife | — | Canada-English |
| 9 | Thomas Spalding | 18 | Son | Clerk | Canada-English |
| 10 | Phyllis Spalding | 17 | daughter | — | Kansas |
| 11 | William Holliday | 56 | Head | Salesman | Canada-English |
| 12 | Maude Holliday | 56 | Wife | — | South Dakota |
| 13 | Robert Holliday | 26 | Son | Gas Attendant | South Dakota |
| 14 | Vera Halver | 46 | Sister-in-law | Nursing | South Dakota |
| 15 | End Of Block | None | — | — | — |
| 16 | Fred H. Reed | 62 | Head | Salesman | Iowa |
| 17 | Helen Reed | 43 | Wife | — | Minnesota |
| 18 | Don. H. Dennis | 22 | Son | — | South Dakota |
| 19 | Betty Lou Meed | 13 | daughter | — | South Dakota |
| 20 | Corwin Simmons | 50 | Head | Dentist | South Dakota |
| 21 | Ida Simmons THIS PERSON | 45 | Wife | Dental Assistant | South Dakota |
| 22 | Cordyn Simmons | 16 | daughter | — | South Dakota |
| 23 | Jerome Simmons | 9 | Son | — | South Dakota |
| 24 | John H. Dempster | 64 | Head | Manager | Nebraska |
| 25 | Nellie Dempster | 56 | Wife | — | Iowa |
| 26 | Marian Dempster | 19 | daughter | Clerical | South Dakota |
| 27 | Carolyn Dempster | 11 | daughter | — | South Dakota |
| 28 | Grace Texter | 53 | Sister-in-law | — | Iowa |
| 29 | Eleanor Texter | 19 | neice | — | South Dakota |
| 30 | Charles P. Dunning | 67 | Head | Manager | Iowa |
| 31 | Charlotte Dunning | 65 | Wife | — | Iowa |
| 32 | Nellie Hoffman | 44 | Head | Stenographer | Wisconsin |
| 33 | Erwin Laura Hoffman | 78 | Mother | — | Wisconsin |
| 34 | Harmie Freeling | 34 | Head | Salesman | South Dakota |
| 35 | Violet Freeling | 31 | Wife | — | South Dakota |
| 36 | Sharon Freeling | 2 | daughter | — | South Dakota |
| 37 | William G. Noel | 31 | Head | Laborer | Iowa |
| 38 | Corriene Noel | 27 | Wife | — | South Dakota |
| 39 | Nancy Noel | 4 | daughter | — | South Dakota |
| 40 | Sally Noel | 2 | daughter | — | 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)