JC
James Cook — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Woodbury-County, Iowa
Our Model Tree links this James Cook across the 1930 and 1940 US Censuses in Woodbury-County, Iowa (XGBoost, ~Confirmed) — first a son (b.~1927), then head of a 10-person household.
Age 13
b. ~1927
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Woodbury-County, Iowa |
| Surname | Cook |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Sioux City |
| 1935 Residence (County) | Woodbury |
| Additional Details | |
| Highest Grade | No 4 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Sioux City |
| Est. Birth Year | ~1927 |
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 James | Age | Birth yr |
|---|---|---|---|---|
| Verna Cook | Daughter | — | 6 | ~1934 |
| Jean Cook | Daughter | — | 8 | ~1932 |
| Clara Cook | Daughter | — | 11 | ~1929 |
| Virginia Cook | Daughter | — | ~1940 | |
| Jesse Cook | Head | — | 38 | ~1902 |
| Robert Cook | Son | — | 4 | ~1936 |
| James Cook | Son | — | 13 | ~1927 |
| Ralph Cook | Son | — | 2 | ~1938 |
| Donald Cook | Son | — | 10 | ~1930 |
| Hazel Cook | Spouse | — | 30 | ~1910 |
Census Appearances
1930
Woodbury, Iowa
Son, age 2
Woodbury, Iowa · implied b. ~1928 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cook |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Woodbury-County, Iowa
Son, age 13
Woodbury-County, Iowa · implied b. ~1927 — 10 household members
| Surname | Cook |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Sioux City |
| 1935 Residence (County) | Woodbury |
| Highest Grade | No 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 James Cook across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
James Cook
Son · 1940 · age 13 · b. ~1927 · Iowa
★ You are viewing this record
Sibling
Clara Cook
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Donald Cook
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Verna Cook
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jean Cook
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ralph Cook
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Cook
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Virginia Cook
Sibling · 1940 · age
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 — Woodbury-County, Iowa
Open full size
1940 US Federal Census — Woodbury-County, Iowa
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-01215-00012)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | William S. Rumbo | 32 | Head | — | Iowa |
| 42 | Manley C. Evans | 63 | Head | Bridge Builder | Tennessee |
| 43 | Docia Evans | 59 | Wife | — | Tennessee |
| 44 | Ted Hall | 71 | Head | — | Iowa |
| 45 | William Jacobs | 39 | Head | Sheet Metal | Iowa |
| 46 | Ben Johnson | 52 | Head | Pipe Layer | Nebraska |
| 47 | Sylvia Tenant | 53 | Head | Day Housework | Nebraska |
| 48 | Carleton C. Logue | 25 | Head | Laborer | Nebraska |
| 49 | Pearl A. Logue | 24 | Wife | — | Nebraska |
| 50 | Curtis Logue | 4 | Son | — | Iowa |
| 51 | John Logue | 1 | Son | — | Iowa |
| 52 | Jesse W. Cook | 38 | Head | Watchman | Missouri |
| 53 | Hazel M. Cook | 30 | Wife | — | Iowa |
| 54 | James Cook THIS PERSON | 13 | Son | — | Iowa |
| 55 | Clara Cook | 11 | Daughter | — | Iowa |
| 56 | Donald Cook | 10 | Son | — | Iowa |
| 57 | Jean Cook | 8 | Daughter | — | Iowa |
| 58 | Verna Cook | 6 | Daughter | — | Iowa |
| 59 | Robert Cook | 4 | Son | — | Iowa |
| 60 | Ralph Cook | 2 | Son | — | Iowa |
| 61 | Virginia Cook | 0 | Daughter | — | Iowa |
| 62 | Ord J. Logue | 50 | Head | — | Missouri |
| 63 | Corydon Logue | 22 | Son | Cement Mixer | Iowa |
| 64 | Emery Logue | 21 | Son | Furnace Helper | Iowa |
| 65 | Eilleen Logue | 15 | Daughter | — | Iowa |
| 67 | Steve Brienza | 65 | Head | Proprietor | Italy |
| 68 | Jennie Brienza | 65 | Wife | — | Italy |
| 69 | Antonetta Caggiano | 35 | Niece | Alterations | Italy |
| 70 | Frank Stabile | 44 | Head | Ham House | Italy |
| 71 | John Stabile | 18 | Son | Odd Jobs | Italy |
| 72 | Mary Stabile | 16 | Daughter | — | Iowa |
| 73 | Tony Stabile | 13 | Son | — | Iowa |
| 74 | Joseph Stabile | 12 | Son | — | Iowa |
| 75 | Patsy Stabile | 10 | Daughter | — | Iowa |
| 76 | Carl Stabile | 4 | Son | — | Iowa |
| 77 | Amelia Stabile | 37 | Wife | — | Italy |
| 78 | Pete Defazio | 46 | Head | Flagman | Italy |
| 79 | Mary Defazio | 35 | Wife | — | Italy |
| 80 | Rose Defazio | 16 | Daughter | — | Iowa |
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)