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Charles Cooper — 1940 US Census Record
Model Tree available1940 United States Federal Census · Calhoun-County, Iowa
Our Model Tree links this Charles Cooper across the 1920, 1930 and 1940 US Censuses in Calhoun-County, Iowa (XGBoost, ~Confirmed), with identified parents Earl & Paul — first a son (b.~1915), then head of a 4-person household.
Age 25
b. ~1915
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Calhoun-County, Iowa |
| Surname | Cooper |
| Given Name | Charles |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Rockwell City |
| 1935 Residence (County) | Calhoun |
| Additional Details | |
| Occupation | Repairman |
| Industry | Radio Shop |
| Class of Worker | OA |
| Income (1939) | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Repairman |
| Township / Ward | Rockwell City |
| Est. Birth Year | ~1915 |
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 Charles | Age | Birth yr |
|---|---|---|---|---|
| Earl Cooper | Head | — | 55 | ~1885 |
| Janet Moore | Other | — | 24 | ~1916 |
| Charles Cooper | Son | — | 25 | ~1915 |
| Evan Cooper | Son | — | 20 | ~1920 |
Census Appearances
1920
Calhoun, Iowa
Son, age 6
Calhoun, Iowa · implied b. ~1914 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cooper |
| Given Name | Charles S |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Calhoun, Iowa
Son, age 16
Calhoun, Iowa · implied b. ~1914 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cooper |
| Given Name | Charles |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Calhoun-County, Iowa
Son, age 25
Calhoun-County, Iowa · implied b. ~1915 — 4 household members
| Surname | Cooper |
| Given Name | Charles |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Rockwell City |
| 1935 Residence (County) | Calhoun |
| Occupation | Repairman |
| Industry | Radio Shop |
| Class of Worker | OA |
| Income (1939) | 0 |
| Highest Grade | H 4 |
| 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 Charles Cooper across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Earl Cooper (~0.92 confidence) and father Paul Cooper (~0.92 confidence) and father Earl Cooper (~0.92 confidence) and mother Sarah Cooper (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Earl Cooper
b. ~1882
Source father
● Household
· direct · ~0.92
Father
Paul Cooper
b. ~1882
Source father
● Household
· direct · ~0.92
Father
Earl Cooper
b. ~1885
Source father
● Household
· direct · ~0.92
Mother
Sarah Cooper
b. ~1890
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Charles Cooper
Son · 1940 · age 25 · b. ~1915 · Iowa
★ You are viewing this record
Sibling
Evan Cooper
Sibling · 1940 · age 20
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 — Calhoun-County, Iowa
Open full size
1940 US Federal Census — Calhoun-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01144-00118)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Chas W. Lighter | 70 | Father-in-law | — | Iowa |
| 42 | Mary Ellen Lighter | 67 | Mother-in-law | — | Iowa |
| 43 | Evan C. Stevenson | 45 | Head | Manager | Iowa |
| 44 | Clara B. Stevenson | 40 | Wife | Abstracter | Iowa |
| 45 | Joan Stevenson | 7 | Daughter | — | Iowa |
| 46 | Peter Vandermulen | 73 | Head | Farmer | Michigan |
| 47 | Amelia Vandermulen | 72 | Wife | — | Iowa |
| 48 | Cecil White | 34 | Head | Proprietor | Iowa |
| 49 | Harriett White | 33 | Wife | Saleslady | Iowa |
| 50 | Priscilla White | 3 | Daughter | — | Iowa |
| 51 | Margaret Fortman | 63 | Mother-in-law | — | Iowa |
| 52 | Helen Jones | 36 | Lodger | Bookkeeper | Iowa |
| 53 | Otto Branick | 45 | Head | Secretary | Illinois |
| 54 | Emma S. Branick | 40 | Wife | — | Iowa |
| 55 | Robert Branick | 17 | Son | Deliveryman | Iowa |
| 56 | Marjorie Branick | 9 | Daughter | — | Iowa |
| 57 | Mary Wilson | 67 | Mother-in-law | — | Iowa |
| 58 | Gerald Neal | 34 | Head | Manager | Iowa |
| 59 | Irma Neal | 30 | Wife | — | Iowa |
| 60 | Nancy Neal | 4 | Daughter | — | Iowa |
| 61 | Bill Neal | 2 | Son | — | Iowa |
| 62 | Ervin Tabor | 42 | Head | Cashier | Iowa |
| 63 | Etta S. Tabor | 44 | Wife | — | Iowa |
| 64 | Donald Tabor | 16 | Son | Office Worker | Iowa |
| 65 | Richard Tabor | 11 | Son | — | Iowa |
| 66 | Elmer H. Pate | 56 | Head | Electrical Engineer | Nebraska |
| 67 | Augusta S. Pate | 58 | Wife | — | Nebraska |
| 68 | William Suckel | 60 | Head | Carpenter | Iowa |
| 69 | Lydia S. Suckel | 56 | Wife | Seamstress | Iowa |
| 70 | Luella Suckel | 17 | Daughter | — | Iowa |
| 71 | Nadine Suckel | 15 | Daughter | — | Iowa |
| 72 | Verna Suckel | 13 | Daughter | — | Iowa |
| 73 | Earl S. Cooper | 55 | Head | — | Iowa |
| 74 | Evan Cooper | 20 | Son | Laborer | Iowa |
| 75 | Charles Cooper THIS PERSON | 25 | Son | Repairman | Iowa |
| 76 | Janet Moore | 24 | Lodger | Bookkeeper | Iowa |
| 77 | Jennie S. Stevenson | 65 | Head | — | England |
| 78 | Grace Newman | 30 | Daughter | Office Worker | Iowa |
| 79 | Merle Newman | 34 | Son-in-law | Typewriter | Iowa |
| 80 | Richard Newman | 3 | Grandson | — | Iowa |
Pedigree Summary
Charles + 1 sibling
Gen 1 · 4 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)