HC
Harold Cook — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Montgomery-County, Indiana
Our Model Tree links this Harold Cook across the 1930 and 1940 US Censuses in Montgomery-County, Indiana (XGBoost, ~Confirmed) — first a son (b.~1923), then head of a 10-person household.
Age 17
b. ~1923
Male
Son
Born: Indiana
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Montgomery-County, Indiana |
| Surname | Cook |
| Given Name | Harold |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Coal Creek |
| 1935 Residence (County) | Montgomery |
| Additional Details | |
| Hours Worked | 0 |
| Highest Grade | H 3 |
| 1935 Residence | Same house |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Township / Ward | Coal Creek |
| Est. Birth Year | ~1923 |
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 |
|---|---|---|---|---|
| Shirley Cook | Daughter | — | 11 | ~1929 |
| Lowell Cook | Head | — | 39 | ~1901 |
| Harold Cook | Son | — | 17 | ~1923 |
| Mary Cook | Spouse | — | 37 | ~1903 |
| Phillip Cook | Son | — | 4 | ~1936 |
| Frances Cook | Daughter | — | 14 | ~1926 |
| Thomas Cook | Son | — | 13 | ~1927 |
| Ruth Cook | Daughter | — | 16 | ~1924 |
| James Cook | Son | — | 5 | ~1935 |
| Sarah Cook | Daughter | — | 7 | ~1933 |
Census Appearances
1930
Montgomery, Indiana
Son, age 7
Montgomery, Indiana · implied b. ~1923 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cook |
| Given Name | Harold |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Indiana |
| Can Read/Write | Yes |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1940
Montgomery-County, Indiana
Son, age 17
Montgomery-County, Indiana · implied b. ~1923 — 10 household members
| Surname | Cook |
| Given Name | Harold |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Coal Creek |
| 1935 Residence (County) | Montgomery |
| Hours Worked | 0 |
| Highest Grade | H 3 |
| 1935 Residence | Same house |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
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 17 · b. ~1923 · Indiana
★ You are viewing this record
Sibling
Frances Cook
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Shirley Cook
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Sarah Cook
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Cook
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Phillip Cook
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ruth Cook
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas 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 — Montgomery-County, Indiana
Open full size
1940 US Federal Census — Montgomery-County, Indiana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01080-00169)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Martha V Crabtree | 10 | Daughter | — | Indiana |
| 42 | Omer L Todd | 45 | Head | Farmer | Indiana |
| 43 | Mary A Todd | 47 | Wife | — | Indiana |
| 44 | Charles W Todd | 23 | Son | General Laborer | Indiana |
| 45 | Ruth V Todd | 15 | Daughter | — | Indiana |
| 46 | Eugene R Payne | 35 | Head | Farmer | Kentucky |
| 47 | Fern E Payne | 33 | Wife | — | Indiana |
| 48 | James G Payne | 12 | Son | — | Indiana |
| 49 | Martha E Payne | 7 | Daughter | — | Indiana |
| 50 | Lowell A Cook | 39 | Head | Farmer | Indiana |
| 51 | Mary L Cook | 37 | Wife | — | Indiana |
| 52 | Harold Cook THIS PERSON | 17 | Son | — | Indiana |
| 53 | Ruth Cook | 16 | Daughter | — | Indiana |
| 54 | Frances E Cook | 14 | Daughter | — | Indiana |
| 55 | Thomas E Cook | 13 | Son | — | Indiana |
| 56 | Shirley L Cook | 11 | Daughter | — | Indiana |
| 57 | Sarah Cook | 7 | Daughter | — | Indiana |
| 58 | James L Cook | 5 | Son | — | Indiana |
| 59 | Phillip E Cook | 4 | Son | — | Indiana |
| 60 | Edgar L Jones | 73 | Head | Farmer | Indiana |
| 61 | Jessie L Jones | 70 | Wife | — | Indiana |
| 62 | James L Hornbeck | 59 | Head | Farmer | Kentucky |
| 63 | Dora L Hornbeck | 64 | Wife | — | Indiana |
| 64 | Martin Fowler | 22 | Hired Hand | Farm Laborer | Tennessee |
| 65 | Emert Hillenburg | 54 | Head | Farmer | Indiana |
| 66 | Effie D Hillenburg | 52 | Wife | — | Indiana |
| 67 | Mark E Jr Davenport | 21 | Head | Pressman | Indiana |
| 68 | Levina E Davenport | 21 | Wife | — | Indiana |
| 69 | Hampton O Black | 62 | Head | Farmer | Indiana |
| 70 | Minnie M Black | 62 | Wife | — | Indiana |
| 71 | Goldie V Mattox | 47 | Head | — | Indiana |
| 72 | Franklin E Oliver | 52 | Head | Farm Laborer | Indiana |
| 73 | Gertrude B Oliver | 56 | Wife | — | Indiana |
| 74 | Ira A Oliver | 24 | Son | Truck Driver | Indiana |
| 75 | James J Rich | 47 | Head | Farmer | Kentucky |
| 76 | Blanche D Rich | 46 | Wife | — | Indiana |
| 77 | Jean Rich | 17 | Daughter | — | Indiana |
| 78 | Charles F Rich | 13 | Son | — | Indiana |
| 79 | Raymond R Lester | 38 | Head | Farmer | Kentucky |
| 80 | Pauline V Lester | 35 | Wife | — | Indiana |
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)