IC
Ida Cook — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Madison-County, Idaho
Our Model Tree links this Ida Cook across the 1930 and 1940 US Censuses in Madison-County, Idaho (XGBoost, ~Confirmed) — first a daughter (b.~1928), then head of a 11-person household.
Age 12
b. ~1928
Female
Daughter
Born: Idaho
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Madison-County, Idaho |
| Surname | Cook |
| Given Name | Ida May |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Idaho |
| 1935 Residence (City) | Archer Precinct |
| 1935 Residence (County) | Madison |
| Additional Details | |
| Highest Grade | G 6 |
| 1935 Residence | Same place |
| Birth State | Idaho |
| Birth Country | United States |
| Birthplace (normalized) | idaho |
| Township / Ward | Archer Precinct |
| Est. Birth Year | ~1928 |
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.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Ida | Age | Birth yr |
|---|---|---|---|---|
| Calvin Cook | Son | — | 8 | ~1932 |
| Delmoe Cook | Head | — | 42 | ~1898 |
| Lulu Cook | Daughter | — | 16 | ~1924 |
| Ida Cook | Daughter | — | 12 | ~1928 |
| Ruth Cook | Daughter | — | 20 | ~1920 |
| Coleen Cook | Daughter | — | 4 | ~1936 |
| Renell Cook | Son | — | 3 | ~1937 |
| Lulu Cook | Spouse | — | 40 | ~1900 |
| Lorin Cook | Son | — | 13 | ~1927 |
| Cecil Cook | Son | — | 18 | ~1922 |
| Loa-Ann Cook | Daughter | — | 6 | ~1934 |
Census Appearances
1930
Madison, Idaho
Daughter, age
Madison, Idaho · implied b. ~1930 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cook |
| Given Name | Ila May |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Idaho |
| Father's Birthplace | Utah |
| Mother's Birthplace | Utah |
| Birth State | Idaho |
| Birth Country | United States |
| Birthplace (normalized) | idaho |
1940
Madison-County, Idaho
Daughter, age 12
Madison-County, Idaho · implied b. ~1928 — 11 household members
| Surname | Cook |
| Given Name | Ida May |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Idaho |
| 1935 Residence (City) | Archer Precinct |
| 1935 Residence (County) | Madison |
| Highest Grade | G 6 |
| 1935 Residence | Same place |
| 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 Ida Cook across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Ida Cook
Daughter · 1940 · age 12 · b. ~1928 · Idaho
★ You are viewing this record
Sibling
Lulu Cook
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Coleen Cook
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Loa-Ann Cook
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lorin Cook
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ruth Cook
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Cecil Cook
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Calvin Cook
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Renell Cook
Sibling · 1940 · age 3
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 — Madison-County, Idaho
Open full size
1940 US Federal Census — Madison-County, Idaho
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00750-00578)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Ronald Widener | 31 | Head | Farmer | Idaho |
| 2 | Eva Widener | 25 | Wife | Housekeeper | Idaho |
| 3 | George Widener | 18 | Son | — | Idaho |
| 4 | Norman Widener | 16 | Son | — | Idaho |
| 5 | June Widener | 12 | Daughter | — | Idaho |
| 6 | Leal B. Cheney | 47 | Head | — | Utah |
| 7 | Wendell Cheney | 20 | Son | Farmer | Idaho |
| 8 | Hulon Cheney | 18 | Son | — | Idaho |
| 9 | Miriam Cheney | 15 | Daughter | — | Idaho |
| 10 | Gerald B. Cheney | 13 | Son | — | Idaho |
| 11 | Alice Leal Cheney | 10 | Daughter | — | Idaho |
| 12 | Vera Cheney | 8 | Daughter | — | Idaho |
| 13 | Rheta Cheney | 6 | Daughter | — | Idaho |
| 14 | Delmoe Cook | 42 | Head | Farmer | Utah |
| 15 | Lulu D. Cook | 40 | Wife | — | Utah |
| 16 | Ruth Cook | 20 | Daughter | — | Idaho |
| 17 | Cecil Cook | 18 | Son | — | Idaho |
| 18 | Lulu Grace Cook | 16 | Daughter | — | Idaho |
| 19 | Lorin Cook | 13 | Son | — | Idaho |
| 20 | Ida May Cook THIS PERSON | 12 | Daughter | — | Idaho |
| 21 | Calvin Cook | 8 | Son | — | Idaho |
| 22 | Loa-Ann Cook | 6 | Daughter | — | Idaho |
| 23 | Coleen Cook | 4 | Daughter | — | Idaho |
| 24 | Renell Cook | 3 | Son | — | Idaho |
| 25 | Delos B. Nelson | 43 | Head | Bus Driver | Utah |
| 26 | Miriam Nelson | 35 | Wife | — | Utah |
| 27 | Mary Nelson | 16 | Daughter | — | Idaho |
| 28 | Delos Jr. Nelson | 14 | Son | — | Idaho |
| 29 | Delila Nelson | 12 | Daughter | — | Idaho |
| 30 | Glen Nelson | 6 | Son | — | Idaho |
| 31 | Lahna Nelson | 1 | Daughter | — | Idaho |
| 32 | Elof A. Nelson | 70 | Head | Salesman | Sweden |
| 33 | Ellen Nelson | 71 | Wife | — | England |
| 34 | Denton Clements | 27 | Head | Teacher | Idaho |
| 35 | Phyllis Clements | 26 | Wife | — | Utah |
| 36 | Diane Clements | 4 | Daughter | — | Idaho |
| 37 | Marilyn Clements | 2 | Daughter | — | Idaho |
| 38 | Archie D. Guymon | 39 | Head | Laborer | Utah |
| 39 | Ellen Blanche Guymon | 34 | Wife | — | Idaho |
| 40 | Coral Blanche Guymon | 10 | Daughter | — | Utah |
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)