HC
Harold Cook — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Twin-Falls-County, Idaho
Our Model Tree links this Harold Cook across the 1930 and 1940 US Censuses in Twin-Falls-County, Idaho (XGBoost, ~Confirmed) — first a son (b.~1925), then head of a 10-person household.
Age 15
b. ~1925
Male
Son
Born: Idaho
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Twin-Falls-County, Idaho |
| Surname | Cook |
| Given Name | Harold |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Idaho |
| 1935 Residence (City) | division of county 102 - 1817C |
| 1935 Residence (County) | Twin Falls |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farmer |
| Class of Worker | OA |
| Hours Worked | 5 |
| Income (1939) | 0 |
| Highest Grade | 8 |
| 1935 Residence | Same house |
| Birth State | Idaho |
| Birth Country | United States |
| Birthplace (normalized) | idaho |
| Occupation | Farmer |
| Township / Ward | Division Of County 102 1817C |
| Est. Birth Year | ~1925 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Harold | Age | Birth yr |
|---|---|---|---|---|
| Charles Cook | Son | — | 13 | ~1927 |
| Barbara Cook | Daughter | — | 10 | ~1930 |
| H Cook | Head | — | 44 | ~1896 |
| Viola Cook | Daughter | — | 24 | ~1916 |
| Norman Cook | Son | — | 22 | ~1918 |
| Raymond Cook | Son | — | 17 | ~1923 |
| Elva Cook | Daughter | — | 19 | ~1921 |
| Ileen Cook | Spouse | — | 39 | ~1901 |
| Harold Cook | Son | — | 15 | ~1925 |
| Virginia Cook | Daughter | — | 21 | ~1919 |
Census Appearances
1930
Twin Falls, …
Son, age 5
Twin Falls, Idaho · implied b. ~1925 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cook |
| Given Name | Harold |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Idaho |
| Father's Birthplace | Utah |
| Mother's Birthplace | Utah |
| Can Read/Write | Yes |
| Birth State | Idaho |
| Birth Country | United States |
| Birthplace (normalized) | idaho |
1940
Twin-Falls-County, Idaho
Son, age 15
Twin-Falls-County, Idaho · implied b. ~1925 — 10 household members
| Surname | Cook |
| Given Name | Harold |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Idaho |
| 1935 Residence (City) | division of county 102 - 1817C |
| 1935 Residence (County) | Twin Falls |
| Occupation | Farmer |
| Industry | Farmer |
| Class of Worker | OA |
| Hours Worked | 5 |
| Income (1939) | 0 |
| Highest Grade | 8 |
| 1935 Residence | Same house |
| Birth State | Idaho |
| Birth Country | United States |
| Birthplace (normalized) | idaho |
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 Harold Cook across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Harold Cook
Son · 1940 · age 15 · b. ~1925 · Idaho
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Sibling
Norman Cook
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Cook
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elva Cook
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Virginia Cook
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Viola Cook
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Barbara Cook
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Raymond Cook
Sibling · 1940 · age 17
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 — Twin-Falls-County, Idaho
Open full size
1940 US Federal Census — Twin-Falls-County, Idaho
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00754-01016)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Ellen M. Dean | 12 | Daughter | — | Idaho |
| 42 | Mary Lou Dean | 9 | Granddaughter | — | Idaho |
| 43 | Patty Rae Dean | 5 | Granddaughter | — | Idaho |
| 44 | Lucinda Wood | 79 | Mother-in-law | — | Idaho |
| 45 | A. M. Pulley | 60 | Head | Farmer | Missouri |
| 46 | Maggie O. Pulley | 55 | Wife | — | Indiana |
| 47 | Clara Maag | 13 | Lodger | — | Idaho |
| 48 | H. L. Hill | 55 | Head | Farmer | So. Dakota |
| 49 | Glada Hill | 42 | Wife | — | So. Dakota |
| 50 | Fred Jr. Hill | 20 | Son | Farmer | Idaho |
| 51 | Lillian Hill | 18 | Daughter | — | Idaho |
| 52 | Bryan Hill | 16 | Son | Farmer | Idaho |
| 53 | Floyd Hill | 13 | Son | Farmer | Idaho |
| 54 | Kenneth Hill | 9 | Son | Farmer | Idaho |
| 55 | James Paul Fink | 44 | Head | Architect | Illinois |
| 56 | Kathryn Fink | 36 | Wife | — | Illinois |
| 57 | S. C. Klin | 46 | Head | Farmer | Virginia |
| 58 | Mildred Klin | 22 | Daughter | Farmer | Idaho |
| 59 | John Klin | 26 | Son | Farmer | Idaho |
| 60 | Robert Dean | 26 | Head | Farmer | Idaho |
| 61 | Leona Dean | 24 | Wife | Farmer | Idaho |
| 62 | Mona Dean | 32 | Daughter | — | Idaho |
| 63 | Betty Lou Dean | 4 | Niece | — | Idaho |
| 64 | Larry Dean | 5 | Nephew | — | Idaho |
| 65 | Darryl Dean | 4 | Nephew | — | Idaho |
| 66 | L. Roy Dean | 3 | Nephew | — | Idaho |
| 67 | H. H. Cook | 44 | Head | Farmer | Utah |
| 68 | Ileen Cook | 39 | Wife | — | Utah |
| 69 | Viola Cook | 24 | Daughter | Farmer | Utah |
| 70 | Norman Cook | 22 | Son | Farmer | Utah |
| 71 | Virginia Cook | 21 | Daughter | Farmer | Idaho |
| 72 | Elva Cook | 19 | Daughter | Farmer | Idaho |
| 73 | Raymond Cook | 17 | Son | Farmer | Idaho |
| 74 | Harold Cook THIS PERSON | 15 | Son | Farmer | Idaho |
| 75 | Charles Cook | 13 | Son | Farmer | Idaho |
| 76 | Barbara Cook | 10 | Daughter | Farmer | Idaho |
| 77 | Chew Chough Hough | 45 | Head | Owner Operator | Idaho |
| 78 | Ruby Albright | 44 | Head | — | Calif. |
| 79 | Betty Albright | 12 | Daughter | — | Calif. |
| 80 | — | 35 | Head | Farm Laborer | Missouri |
Related Census Records
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)