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John Cooper — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Piatt-County, Illinois
Our Model Tree links this John Cooper across the 1920, 1930 and 1940 US Censuses in Piatt-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1883), then head of a 3-person household.
Age 57
b. ~1883
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Piatt-County, Illinois |
| Surname | Cooper |
| Given Name | John E. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 57 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | San Jose |
| 1935 Residence (County) | Mason |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | E |
| Hours Worked | 40 |
| Income (1939) | 0 |
| Highest Grade | No 2 |
| 1935 Residence | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Farmer |
| Township / Ward | Cerro Gordo Twp |
| Est. Birth Year | ~1883 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Margaret Cooper | Daughter | — | 25 | ~1915 |
| John Cooper | Head | — | 57 | ~1883 |
| Linnie Cooper | Spouse | — | 53 | ~1887 |
Census Appearances
1920
Macon, Illinois
Head, age 37
Macon, Illinois · implied b. ~1883 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cooper |
| Given Name | John E. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | Illinois |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Illinois |
| Occupation | Farmer |
| Industry | General Farm |
| Class of Worker | Emp |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Macon, Illinois
Head, age 47
Macon, Illinois · implied b. ~1883 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cooper |
| Given Name | John E. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 22 |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Illinois |
| Occupation | Farmer |
| Industry | Gen Farm |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 1000 |
| Radio Set | R |
| Veteran | No |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Piatt-County, Illinois
Head, age 57
Piatt-County, Illinois · implied b. ~1883 — 3 household members
| Surname | Cooper |
| Given Name | John E. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 57 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | San Jose |
| 1935 Residence (County) | Mason |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | E |
| Hours Worked | 40 |
| Income (1939) | 0 |
| Highest Grade | No 2 |
| 1935 Residence | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 John 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
John Cooper
Head · 1940 · age 57 · b. ~1883 · Illinois
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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 — Piatt-County, Illinois
Open full size
1940 US Federal Census — Piatt-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00867-00159)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Guy Davidson | 45 | Head | Farmer | Illinois |
| 2 | Vada Davidson | 45 | Wife | — | Illinois |
| 3 | Marjorie Davidson | 21 | Daughter | Clerk | Illinois |
| 4 | Donell Davidson | 17 | Son | — | Illinois |
| 5 | Wilma Davidson | 7 | Daughter | — | Illinois |
| 6 | Ray E. Ensign | 45 | Head | Farm Laborer | Iowa |
| 7 | Mady L. Ensign | 45 | Wife | — | Illinois |
| 8 | Wayne Ensign | 25 | Son | Farm Laborer | Illinois |
| 9 | Glenn Ensign | 22 | Son | Farm Laborer | Illinois |
| 10 | Marylee E. Ensign | 7 | Daughter | — | Illinois |
| 11 | Lee L. Mellinger | 61 | Head | Farmer | Illinois |
| 12 | Rose M. Mellinger | 66 | Wife | — | Indiana |
| 13 | Lee Hess | 86 | Uncle | — | Illinois |
| 14 | John E. Cooper THIS PERSON | 57 | Head | Farmer | Illinois |
| 15 | Linnie (X) Cooper | 53 | Wife | — | Illinois |
| 16 | Margaret E. Cooper | 25 | Daughter | Operator | Illinois |
| 17 | William Van Horn | 52 | Head | Farmer | Illinois |
| 18 | Bessie Van Horn | 51 | Wife | — | Illinois |
| 19 | Helen M. Van Horn | 19 | Daughter | — | Illinois |
| 20 | Alfred Ofield | 34 | Head | Farm Laborer | Kentucky |
| 21 | Allie (X) Ofield | 31 | Wife | — | Kentucky |
| 22 | Zelma Ofield | 11 | Daughter | — | Illinois |
| 23 | Juanita Ofield | 8 | Son | — | Illinois |
| 24 | James Waugh | 38 | Head | Driver | Indiana |
| 25 | Elsie (X) Waugh | 40 | Wife | — | Illinois |
| 26 | Vandervort Robert V. Waugh | 20 | Step-son | — | Illinois |
| 27 | Otis R. Curry | 34 | Head | Beam Coiler | Illinois |
| 28 | Elsie (X) Curry | 32 | Wife | — | Kentucky |
| 29 | Donald Curry | 10 | Son | — | Illinois |
| 30 | Linda F. Curry | 3 | Daughter | — | Illinois |
| 31 | Bonnie K. Curry | 1 | Daughter | — | Illinois |
| 32 | Carl J. X Hite | 26 | Head | Farmer | Illinois |
| 33 | Edith H. Hite | 25 | Wife | — | Illinois |
| 34 | Wilma E. Hite | 5 | Daughter | — | Illinois |
| 35 | Casper Hamman | 44 | Head | Farmer | Iowa |
| 36 | John Hick | 72 | Head | Farmer | Pennsylvania |
| 37 | Alonzo Hick | 63 | Son | — | Illinois |
| 38 | Cathrine Hick | 61 | Daughter | — | Illinois |
| 39 | Ada Hick | 56 | Daughter | — | Illinois |
| 40 | Raymond Myers | 40 | Head | Farmer | Illinois |
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)