HC
Harold Cook — 1940 US Census Record
Model Tree available1940 United States Federal Census · Jefferson-County, Missouri
Our Model Tree links this Harold Cook across the 1920, 1930 and 1940 US Censuses in Jefferson-County, Missouri (XGBoost, ~Confirmed), with identified parents Elmer & Elmer — first a son (b.~1914), then head of a 11-person household.
Age 26
b. ~1914
Male
Son
Born: Missouri
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Jefferson-County, Missouri |
| Surname | Cook |
| Given Name | Harold |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Missouri |
| 1935 Residence (City) | Festus City |
| 1935 Residence (County) | Jefferson |
| Additional Details | |
| Occupation | Shoe Shiner |
| Industry | Barber Shop |
| Class of Worker | OA |
| Hours Worked | 54 |
| Income (1939) | 400 |
| Highest Grade | H 2 |
| 1935 Residence | Same House |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
| Occupation | Shoe Shiner |
| Township / Ward | Festus City |
| Est. Birth Year | ~1914 |
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 Harold | Age | Birth yr |
|---|---|---|---|---|
| Elmer Cook | Head | — | 48 | ~1892 |
| Ernest Cook | Son | — | 7 | ~1933 |
| Harold Cook | Son | — | 26 | ~1914 |
| Margaret Cook | Daughter | — | 16 | ~1924 |
| Wilma Cook | Daughter | — | 23 | ~1917 |
| Kermit Cook | Son | — | 13 | ~1927 |
| Carlie Cook | Spouse | — | 49 | ~1891 |
| Barbara Cook | Daughter | — | 6 | ~1934 |
| Gerald Wingo | Son | — | 1 | ~1939 |
| Carl Cook | Son | — | 20 | ~1920 |
| Ferna Cook | Daughter | — | 14 | ~1926 |
Census Appearances
1920
Jefferson, Missouri
Other, age 5
Jefferson, Missouri · implied b. ~1915 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cook |
| Given Name | Harold |
| Relationship to Head | Nephew |
| Sex | M |
| Color / Race | Black |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Missouri |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Missouri |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1930
Jefferson, Missouri
Son, age 16
Jefferson, Missouri · implied b. ~1914 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cook |
| Given Name | Harold R |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Missouri |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Missouri |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1940
Jefferson-County, Missouri
Son, age 26
Jefferson-County, Missouri · implied b. ~1914 — 11 household members
| Surname | Cook |
| Given Name | Harold |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Missouri |
| 1935 Residence (City) | Festus City |
| 1935 Residence (County) | Jefferson |
| Occupation | Shoe Shiner |
| Industry | Barber Shop |
| Class of Worker | OA |
| Hours Worked | 54 |
| Income (1939) | 400 |
| Highest Grade | H 2 |
| 1935 Residence | Same House |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
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 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Elmer Cook (~0.92 confidence) and father Elmer Cook (~0.92 confidence) and mother Carlie Cook (~0.92 confidence) and mother Katie Cook (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Elmer Cook
b. ~1900
Source father
● Household
· direct · ~0.92
Father
Elmer Cook
b. ~1892
Source father
● Household
· direct · ~0.92
Mother
Carlie Cook
b. ~1891
Source mother
● Household
· direct · ~0.92
Mother
Katie Cook
b. ~1891
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Harold Cook
Son · 1940 · age 26 · b. ~1914 · Missouri
★ You are viewing this record
Sibling
Barbara Cook
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gerald Wingo
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ferna Cook
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Cook
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Wilma Cook
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Carl Cook
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ernest Cook
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Kermit Cook
Sibling · 1940 · age 13
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 — Jefferson-County, Missouri
Open full size
1940 US Federal Census — Jefferson-County, Missouri
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02119-00206)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Izeta Cultron | 16 | Daughter | — | Arkansas |
| 42 | Orville Jr. Cultron | 1 | Grand Son | — | Missouri |
| 43 | Wesley Smith | 54 | Head | Laborer | Missouri |
| 44 | Edith Smith | 50 | Wife | — | Missouri |
| 45 | John Smith | 17 | Son | New Worker | Missouri |
| 46 | Edgar Smith | 12 | Son | — | Missouri |
| 47 | Earlus Smith | 10 | Son | — | Missouri |
| 48 | Fines Blackwell | 57 | Head | — | Missouri |
| 49 | Cora Kaiser | 54 | Lodger | Housekeeper | Missouri |
| 50 | Luke Smith | 65 | Head | Laborer | Missouri |
| 51 | George Montgomery | 29 | Head | Landscaper | Mississippi |
| 52 | Bell Christ | 53 | Mother | Housekeeper | Mississippi |
| 53 | Rachael Rogers | 78 | Head | — | Missouri |
| 54 | Washington Rogers | 78 | Husband | — | Missouri |
| 55 | Beverly Hoszly | 2 | Grand Daughter | — | Missouri |
| 56 | Rachael Duke | 19 | Grand Daughter | Houseworker | Missouri |
| 57 | Carrie Sides | 85 | Sister | — | Missouri |
| 58 | Climmue Henderson | 51 | Head | Laborer | Mississippi |
| 59 | Phily Henderson | 51 | Wife | — | Mississippi |
| 60 | Cleotse Henderson | 22 | Son | New Worker | Mississippi |
| 61 | Birdsser Henderson | 16 | Daughter | — | Mississippi |
| 62 | Rufus Henderson | 10 | Daughter | — | Mississippi |
| 63 | Obadiah Henderson | 8 | Son | — | Missouri |
| 64 | Sophia Cook | 57 | Head | — | Missouri |
| 65 | James Cook | 34 | Son | Truck Helper | Missouri |
| 66 | Cord Hill | 36 | Head | — | Missouri |
| 67 | Cassius Grey | 53 | Head | Laborer | Missouri |
| 68 | Georgia Grey | 50 | Wife | — | Missouri |
| 69 | Housker Grey | 16 | Son | — | Missouri |
| 70 | Elmer Cook | 48 | Head | Tanker | Missouri |
| 71 | Carlie Cook | 49 | Wife | — | Missouri |
| 72 | Harold Cook THIS PERSON | 26 | Son | Shoe Shiner | Missouri |
| 73 | Wilma Cook | 23 | Daughter | Laundress | Indiana |
| 74 | Carl Ab Cook | 20 | Son | Plasterer | Indiana |
| 75 | Margaret Cook | 16 | Daughter | — | Missouri |
| 76 | Ferna Cook | 14 | Daughter | — | Missouri |
| 77 | Kermit Cook | 13 | Son | — | Missouri |
| 78 | Ernest Cook | 7 | Son | — | Missouri |
| 79 | Barbara Cook | 6 | Daughter | — | Missouri |
| 80 | Gerald Wingo | 1 | Son | — | Missouri |
Pedigree Summary
Harold + 8 siblings
Gen 1 · 4 parents
~0.92
Max depth 4 (1900–1950 window)
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)