RC
Ruth Cooper — 1940 US Census Record
Model Tree available1940 United States Federal Census · Polk-County, Iowa
Our Model Tree links this Ruth Cooper across the 1920, 1930 and 1940 US Censuses in Polk-County, Iowa (XGBoost, ~Confirmed), with identified parents Charles & Emma — first a daughter (b.~1919), then head of a 3-person household.
Age 21
b. ~1919
Female
Daughter
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Polk-County, Iowa |
| Surname | Cooper |
| Given Name | Ruth C |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Additional Details | |
| Occupation | Freight Co |
| Industry | PW |
| Class of Worker | 780 |
| Highest Grade | H-4 |
| 1935 Residence | 57 |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Freight Co |
| Township / Ward | Des Moines City |
| Est. Birth Year | ~1919 |
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 Ruth | Age | Birth yr |
|---|---|---|---|---|
| Charles Cooper | Head | — | 65 | ~1875 |
| Emma Cooper | Spouse | — | 52 | ~1888 |
| Ruth Cooper | Daughter | — | 21 | ~1919 |
Census Appearances
1920
Polk, Iowa
Daughter, age 1
Polk, Iowa · implied b. ~1919 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cooper |
| Given Name | Ruth C. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Maryland |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Polk, Iowa
Daughter, age 11
Polk, Iowa · implied b. ~1919 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cooper |
| Given Name | Ruth C |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Maryland |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Polk-County, Iowa
Daughter, age 21
Polk-County, Iowa · implied b. ~1919 — 3 household members
| Surname | Cooper |
| Given Name | Ruth C |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Occupation | Freight Co |
| Industry | PW |
| Class of Worker | 780 |
| Highest Grade | H-4 |
| 1935 Residence | 57 |
| 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 Ruth Cooper across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Charles Cooper (~0.92 confidence) and mother Emma Cooper (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Charles Cooper
b. ~1875
Source father
● Household
· direct · ~0.92
Mother
Emma Cooper
b. ~1889
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Ruth Cooper
Daughter · 1940 · age 21 · b. ~1919 · Iowa
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Polk-County, Iowa
Open full size
1940 US Federal Census — Polk-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01196-00127)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Troy E Williams | 38 | Head | Stationary Co. | Iowa |
| 2 | Francis L Williams | 25 | Wife | — | Illinois |
| 3 | Lyle D Williams | 3 | Son | — | Des Moines |
| 4 | Linda Carol Williams | 0 | Daughter | — | Des Moines |
| 5 | Guy Morgan | 41 | Head | Sewer Const. | Iowa |
| 6 | Ruby Morgan | 33 | Wife | — | Missouri |
| 7 | Charles Church | 70 | Head | — | Michigan |
| 8 | Charles C Cooper | 65 | Head | Well Co | Pennsylvania |
| 9 | Emma Cooper | 52 | Wife | — | Maryland |
| 10 | Ruth C Cooper THIS PERSON | 21 | Daughter | Freight Co | Iowa |
| 11 | Nate M Hopper | 35 | Head | Hotel | Iowa |
| 12 | Calvert A Hopper | 18 | Son | — | Des Moines |
| 13 | Robert L Hopper | 16 | Son | — | Des Moines |
| 14 | Deloris D Hopper | 11 | Daughter | — | Des Moines |
| 15 | Barbara Jean Hopper | 9 | Daughter | — | California |
| 16 | Kenneth E Hopper | 4 | Son | — | Des Moines |
| 17 | Elizabeth M Frey | 40 | Head | Own Home | Iowa |
| 18 | Betty Frey | 19 | Daughter | Public | Iowa |
| 19 | Sylvia Frey | 17 | Daughter | — | Iowa |
| 20 | John E Hanselman | 37 | Head | Filling Station | Des Moines |
| 21 | Vivian O Hanselman | 32 | Wife | — | Iowa |
| 22 | John L Hanselman | 1 | Son | — | Des Moines |
| 23 | Frederick J Dunn | 46 | Head | Armory Corp. | Massachusetts |
| 24 | Edith W Dunn | 37 | Wife | Furniture Store | Iowa |
| 25 | Thornton James E Dunn | 79 | Father-in-law | — | Massachusetts |
| 26 | Geraldine A Mitchell | 20 | Niece | Hospital | Iowa |
| 27 | Arthur V Rund | 45 | Head | U.S. Post Office | Des Moines |
| 28 | Charlotte Rund | 47 | Wife | — | Iowa |
| 29 | Alvin Wendell Hanes | 23 | Step son | Gas Station | Des Moines |
| 30 | C. Nadean Rund | 16 | Daughter | — | Des Moines |
| 31 | Mary Joyce O Rund | 14 | Daughter | — | Des Moines |
| 32 | Roy H Miles | 60 | Head | Sales Agency | Massachusetts |
| 33 | Anna S Miles | 49 | Wife | — | Iowa |
| 34 | John L Walsh | 33 | Head | Cleaning Est. | Iowa |
| 35 | Irene J Walsh | 30 | Wife | Auto Service | Iowa |
| 36 | James A Logan | 61 | Head | City Of Des Moines | Iowa |
| 37 | Clara May Logan | 60 | Wife | — | Iowa |
| 38 | Dennis Pettit | 53 | Head | River Bank Court | Iowa |
| 39 | Jacqueline Pettit | 62 | Wife | Private Home | New York |
| 40 | Forrest Groninger | 65 | Head | — | Nebraska |
Related Census Records
Pedigree Summary
Ruth
Gen 1 · 2 parents
~0.92
Max depth 4 (1900–1950 window)
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)