JH
John Harmon — 1940 US Census Record
Model Tree available1940 United States Federal Census · Wapello-County, Iowa
Our Model Tree links this John Harmon across the 1920, 1930 and 1940 US Censuses in Wapello-County, Iowa (XGBoost, ~Confirmed), with identified parents Ollie & George — first a son (b.~1917), then head of a 4-person household.
Age 23
b. ~1917
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Wapello-County, Iowa |
| Surname | Harmon |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Eldon City |
| 1935 Residence (County) | Wapello County |
| Additional Details | |
| Occupation | grocery clerk |
| Industry | retail grocery |
| Class of Worker | OA |
| Hours Worked | 54 |
| Income (1939) | 298 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Grocery Clerk |
| Township / Ward | Eldon City |
| Est. Birth Year | ~1917 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Helen Harmon | Daughter | — | 28 | ~1912 |
| George Harmon | Head | — | 54 | ~1886 |
| John Harmon | Son | — | 23 | ~1917 |
| Ollie Harmon | Spouse | — | 74 | ~1866 |
Census Appearances
1920
Wapello, Iowa
Son, age 3
Wapello, Iowa · implied b. ~1917 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Harmon |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Wapello, Iowa
Son, age 13
Wapello, Iowa · implied b. ~1917 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Harmon |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Wapello-County, Iowa
Son, age 23
Wapello-County, Iowa · implied b. ~1917 — 4 household members
| Surname | Harmon |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Eldon City |
| 1935 Residence (County) | Wapello County |
| Occupation | grocery clerk |
| Industry | retail grocery |
| Class of Worker | OA |
| Hours Worked | 54 |
| Income (1939) | 298 |
| Highest Grade | H 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 John Harmon across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Ollie Harmon (~0.92 confidence) and father George Harmon (~0.92 confidence) and father George Harmon (~0.92 confidence) and mother Allie Harmon (~0.92 confidence) and mother Ollie Harmon (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Ollie Harmon
b. ~1866
Source mother
● Household
· direct · ~0.92
Father
George Harmon
b. ~1881
Source father
● Household
· direct · ~0.92
Father
George Harmon
b. ~1886
Source father
● Household
· direct · ~0.92
Mother
Allie Harmon
b. ~1891
Source mother
● Household
· direct · ~0.92
Mother
Ollie Harmon
b. ~1891
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Harmon
Son · 1940 · age 23 · b. ~1917 · Iowa
★ You are viewing this record
Sibling
Helen Harmon
Sibling · 1940 · age 28
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 — Wapello-County, Iowa
Open full size
1940 US Federal Census — Wapello-County, Iowa
Page Contents
37 people indexed on this census page (nara:1940:m-t0627-01209-01251)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Claude Finney | 45 | Head | Brakeman | Iowa |
| 2 | Gertrude Finney | 42 | Wife | — | Iowa |
| 3 | Jack Finney | 11 | Son | — | Iowa |
| 4 | Floyd Perry | 60 | Head | Assessor | Iowa |
| 5 | Lela Perry | 57 | Wife | — | Iowa |
| 7 | Lyle Hall | 56 | Head | — | Illinois |
| 8 | Chloe Hall | 57 | Wife | — | Iowa |
| 9 | Wallace Campbell | 47 | Head | Embalmer | Iowa |
| 10 | Helen Campbell | 44 | Wife | Embalmer | Iowa |
| 11 | Ray M. Campbell | 21 | Son | Apprentice | Iowa |
| 12 | Mary Dezood | 31 | Lodger | Housemaid | Iowa |
| 13 | David Cartwright | 59 | Head | Grocery Clerk | Iowa |
| 14 | Grace Cartwright | 61 | Wife | — | Illinois |
| 15 | J. Max Cartwright | 23 | Son | Grocery Clerk | Iowa |
| 17 | Ora Perry | 57 | Head | — | Iowa |
| 18 | Claude Humble | 60 | Head | Extra Conductor | Iowa |
| 19 | Grace Humble | 57 | Wife | — | Iowa |
| 20 | Leonard Freeborn | 37 | Head | Cashier | Iowa |
| 21 | Helen Freeborn | 35 | Wife | — | Colorado |
| 22 | Marilyn Freeborn | 12 | Daughter | — | Iowa |
| 23 | Nelson Freeborn | 7 | Son | — | Iowa |
| 24 | Fred Glotfelty | 61 | Head | Engineer | Iowa |
| 25 | Carrie Glotfelty | 62 | Wife | — | Iowa |
| 26 | Bettie Glotfelty | 19 | Daughter | Clerk | Iowa |
| 27 | David Glotfelty | 25 | Son | — | Iowa |
| 28 | Leota Glotfelty | 22 | Daughter-in-law | Teacher | Iowa |
| 29 | Alba J. Mckay | 54 | Head | Engineer | Iowa |
| 30 | Elizabeth Mckay | 50 | Wife | — | Iowa |
| 31 | Henry E. Ritz | 66 | Head | Lumberman | Iowa |
| 32 | Mildred Ritz | 27 | Wife | — | Iowa |
| 33 | Leon Hinkley | 56 | Brother-in-law | Lumberman | Iowa |
| 34 | George Harmon | 54 | Head | Brakeman | Iowa |
| 35 | Ollie Harmon | 74 | Wife | — | Iowa |
| 36 | John Harmon THIS PERSON | 23 | Son | Grocery Clerk | Iowa |
| 37 | Helen Harmon | 28 | Daughter | — | Iowa |
| 39 | Chester Eakins | 34 | Head | Fireman | Iowa |
| 40 | Juanita Eakins | 32 | Wife | — | Iowa |
Pedigree Summary
John + 1 sibling
Gen 1 · 5 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)