RC
Richard Cook — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Sac-County, Iowa
Our Model Tree links this Richard Cook across the 1930 and 1940 US Censuses in Sac-County, Iowa (XGBoost, ~Confirmed) — first a son (b.~1926), then head of a 10-person household.
Age 14
b. ~1926
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Sac-County, Iowa |
| Surname | Cook |
| Given Name | Richard |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Levey Township |
| 1935 Residence (County) | Sac |
| Additional Details | |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Levey Township |
| Est. Birth Year | ~1926 |
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 Richard | Age | Birth yr |
|---|---|---|---|---|
| Roy Cook | Son | — | 23 | ~1917 |
| Blanch Cook | Daughter | — | 8 | ~1932 |
| Jackie Cook | Son | — | 6 | ~1934 |
| Clifford Cook | Son | — | 20 | ~1920 |
| Robert Cook | Son | — | 16 | ~1924 |
| Addison Cook | Son | — | 18 | ~1922 |
| Carrie Cook | Spouse | — | 52 | ~1888 |
| Lloyd Cook | Head | — | 55 | ~1885 |
| Bettie Cook | Daughter | — | 11 | ~1929 |
| Richard Cook | Son | — | 14 | ~1926 |
Census Appearances
1930
Sac, Iowa
Other, age 4
Sac, Iowa · implied b. ~1926 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cook |
| Given Name | Richard |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | none |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Sac-County, Iowa
Son, age 14
Sac-County, Iowa · implied b. ~1926 — 10 household members
| Surname | Cook |
| Given Name | Richard |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Levey Township |
| 1935 Residence (County) | Sac |
| Highest Grade | 8 |
| 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 Richard Cook across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Richard Cook
Son · 1940 · age 14 · b. ~1926 · Iowa
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Sibling
Clifford Cook
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bettie Cook
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Addison Cook
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Blanch Cook
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Cook
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Roy Cook
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jackie Cook
Sibling · 1940 · age 6
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 — Sac-County, Iowa
Open full size
1940 US Federal Census — Sac-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01201-00715)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Anna Mace | 35 | Wife | — | Iowa |
| 2 | Irvin Mace | 5 | Son | — | Iowa |
| 3 | R. H. Dean | 35 | Head | Farmer | Iowa |
| 4 | Alice Dean | 34 | Wife | — | Iowa |
| 5 | Shirley Dean | 14 | Daughter | — | Iowa |
| 6 | Shirley Dean | 13 | Daughter | — | Iowa |
| 7 | Barry Dean | 9 | Son | — | Iowa |
| 8 | Will H. Decke | 63 | Head | — | Germany |
| 9 | Mary Decke | 64 | Wife | — | Iowa |
| 10 | Mel Richardson | 43 | Head | Farmer | Iowa |
| 11 | Bessie Richardson | 44 | Wife | — | Iowa |
| 12 | Marion Ryan | 22 | Son | Laborer | Iowa |
| 13 | Fred Rode | 58 | Head | Farmer | Iowa |
| 14 | Ida Rode | 54 | Wife | — | Iowa |
| 15 | Gayle Adam | 23 | Head | Farmer | Nebraska |
| 16 | Gayle Johnson | 35 | Boarder | Teacher | Iowa |
| 17 | Leo Rohdie | 38 | Head | Farmer | Iowa |
| 18 | Griselda Rohdie | 36 | Wife | — | Iowa |
| 19 | Sylvia Rohdie | 17 | Daughter | — | Iowa |
| 20 | Kenneth Rohdie | 11 | Son | — | Iowa |
| 21 | Lloyd Cook | 55 | Head | Farmer | Iowa |
| 22 | Carrie Cook | 52 | Wife | — | Iowa |
| 23 | Roy Cook | 23 | Son | Farmer | Iowa |
| 24 | Clifford Cook | 20 | Son | Farmer | Iowa |
| 25 | Addison Cook | 18 | Son | — | Iowa |
| 26 | Robert Cook | 16 | Son | Farmer | Iowa |
| 27 | Richard Cook THIS PERSON | 14 | Son | — | Iowa |
| 28 | Bettie Cook | 11 | Daughter | — | Iowa |
| 29 | Blanch Cook | 8 | Daughter | — | Iowa |
| 30 | Jackie Cook | 6 | Son | — | Iowa |
| 31 | James Book | 29 | Head | Farmer | Iowa |
| 32 | Nellie Book | 25 | Wife | — | Iowa |
| 33 | Lloyd Book | 5 | Son | — | Iowa |
| 34 | John Beers | 56 | Head | Farmer | Iowa |
| 35 | Annie Beers | 40 | Wife | — | Iowa |
| 36 | Donald Amsdie | 16 | Nephew | Farmer | Iowa |
| 37 | Glenna Beers | 14 | Niece | — | Iowa |
| 38 | Lois Beers | 13 | Niece | — | Iowa |
| 39 | Florence Beers | 11 | Niece | — | Iowa |
| 40 | C. Wm. Vanderploeg | 31 | Head | Farmer | Iowa |
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)