SC
Sarah Cooper — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Dallas-County, Iowa
Our Model Tree links this Sarah Cooper across the 1920, 1930 and 1940 US Censuses in Dallas-County, Iowa (XGBoost, ~Confirmed) — first a head (b.~1865), then head of a 2-person household.
Age 75
b. ~1865
Female
Head
Born: Iowa
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Dallas-County, Iowa |
| Surname | Cooper |
| Given Name | Sarah A |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 75 |
| Marital Status | Widowed |
| Birthplace | Iowa |
| 1935 Residence (City) | Adel town |
| 1935 Residence (County) | Dallas |
| Additional Details | |
| Industry | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Adel Town |
| Est. Birth Year | ~1865 |
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.
2 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Sarah | Age | Birth yr |
|---|---|---|---|---|
| Guy Cooper | Son | — | 48 | ~1892 |
| Sarah Cooper | Head | — | 75 | ~1865 |
Census Appearances
1920
Dallas, Iowa
Head, age 55
Dallas, Iowa · implied b. ~1865 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cooper |
| Given Name | Sarah |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 55 |
| Marital Status | Widowed |
| Birthplace | Iowa |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Indiana |
| Occupation | Laundress |
| Industry | Private Family |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | O |
| Home Free/Mortgaged | F |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Dallas, Iowa
Head, age 65
Dallas, Iowa · implied b. ~1865 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cooper |
| Given Name | Sarah H. |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 65 |
| Marital Status | Widowed |
| Birthplace | Iowa |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Indiana |
| Occupation | Laundry |
| Industry | Home |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 1500 |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Dallas-County, Iowa
Head, age 75
Dallas-County, Iowa · implied b. ~1865 — 2 household members
| Surname | Cooper |
| Given Name | Sarah A |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 75 |
| Marital Status | Widowed |
| Birthplace | Iowa |
| 1935 Residence (City) | Adel town |
| 1935 Residence (County) | Dallas |
| Industry | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
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 Sarah Cooper across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Sarah Cooper
Head · 1940 · age 75 · b. ~1865 · Iowa
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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 — Dallas-County, Iowa
Open full size
1940 US Federal Census — Dallas-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01153-00041)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Neale P Caudron | 20 | Son | Attendant | Iowa |
| 2 | Calvin H Caudron | 17 | Son | — | Iowa |
| 3 | Jo Ann Caudron | 5 | Daughter | — | Iowa |
| 4 | James F Johnson | 55 | Head | Laborer | New York |
| 5 | Kate Johnson | 49 | Wife | — | Iowa |
| 6 | Katherine B Johnson | 24 | Daughter | Waitress | Iowa |
| 7 | Catherine Johnson | 89 | Mother | — | Canada |
| 8 | Joseph Johnson | 58 | Brother | Laborer | New York |
| 9 | Jesse D Stayner | 64 | Head | Laborer | Illinois |
| 10 | Daisy Stayner | 62 | Wife | — | Illinois |
| 11 | Russell J Stayner | 23 | Son | Yard Foreman | Iowa |
| 12 | Sarah A Cooper THIS PERSON | 75 | Head | — | Iowa |
| 13 | Guy E Cooper | 48 | Son | Gardener | Nebraska |
| 14 | Nellie M Keeney | 46 | Head | — | Iowa |
| 15 | Mcatie James H Keeney | 25 | Son | Section Laborer | Iowa |
| 16 | Carol L Keeney | 14 | Daughter | — | Iowa |
| 17 | Joseph M York | 56 | Head | Carpenter | Iowa |
| 18 | Maye M York | 54 | Wife | — | Iowa |
| 19 | Richard J York | 32 | Son | Truck Driver | Iowa |
| 20 | Robert H York | 26 | Son | Farm Hand | Iowa |
| 21 | Clinton R York | 23 | Son | Farm Hand | Iowa |
| 22 | Kenneth J York | 15 | Son | — | Iowa |
| 23 | Ethel B Hays | 50 | Head | — | Kansas |
| 24 | George M Wilkins | 54 | Lodger | Fireman | Iowa |
| 25 | Francis L Meade | 56 | Head | Saleslady | Missouri |
| 26 | Riley M Hartman | 30 | Head | Laborer | Iowa |
| 27 | Eva I Hartman | 28 | Wife | — | Iowa |
| 28 | Otis V Hartman | 11 | Son | — | Iowa |
| 29 | Joan Hartman | 9 | Daughter | — | Iowa |
| 30 | Kate Raffey | 75 | Head | — | Iowa |
| 31 | Earnest D Raffey | 55 | Son | — | Iowa |
| 32 | Harley H Harper | 54 | Head | Proprietor | Iowa |
| 33 | Sadie M Harper | 39 | Wife | — | Missouri |
| 34 | Bethel I Harper | 15 | Daughter | — | Iowa |
| 35 | Harlene H Harper | 14 | Daughter | — | Iowa |
| 36 | Terry R Harper | 6 | Son | — | Iowa |
| 37 | Ellen Kellogg | 55 | Head | — | Iowa |
| 38 | George A Bennett | 44 | Head | Clerk Of Court | Iowa |
| 39 | Corinne Bennett | 44 | Wife | — | Missouri |
| 40 | Stacy Van Cleave | 53 | Head | Superintendent | 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)