JH
John Harper — 1940 US Census Record
Model Tree available1940 United States Federal Census · Harrison-County, Iowa
Our Model Tree links this John Harper across the 1920, 1930 and 1940 US Censuses in Harrison-County, Iowa (XGBoost, ~Confirmed), with identified parents Elisha & Lucy — first a head (b.~1904), then head of a 4-person household.
Age 36
b. ~1904
Male
Head
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Harrison-County, Iowa |
| Surname | Harper |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Jefferson Township |
| 1935 Residence (County) | Harrison |
| Additional Details | |
| Occupation | farming |
| Industry | farm |
| Class of Worker | OA |
| Hours Worked | 50 |
| Income (1939) | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Farming |
| Township / Ward | Jefferson Township |
| Est. Birth Year | ~1904 |
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 |
|---|---|---|---|---|
| Joanne Harper | Daughter | — | 6 | ~1934 |
| Corrine Harper | Daughter | — | 13 | ~1927 |
| John Harper | Head | — | 36 | ~1904 |
| Tessa Harper | Spouse | — | 33 | ~1907 |
Census Appearances
1920
Harrison, Iowa
Son, age 16
Harrison, Iowa · implied b. ~1904 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Harper |
| Given Name | John H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Harrison, Iowa
Head, age 26
Harrison, Iowa · implied b. ~1904 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Harper |
| Given Name | John F |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Married |
| Birthplace | Iowa |
| Age at First Marriage | 21 |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | Farmer |
| Industry | General Farm |
| Class of Worker | E |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 10 |
| Veteran | No |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Harrison-County, Iowa
Head, age 36
Harrison-County, Iowa · implied b. ~1904 — 4 household members
| Surname | Harper |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Jefferson Township |
| 1935 Residence (County) | Harrison |
| Occupation | farming |
| Industry | farm |
| Class of Worker | OA |
| Hours Worked | 50 |
| Income (1939) | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Iowa |
| 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 Harper across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Elisha Harper (~0.92 confidence) and mother Lucy Harper (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Elisha Harper
b. ~1868
Source father
● Household
· direct · ~0.92
Mother
Lucy Harper
b. ~1875
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Harper
Head · 1940 · age 36 · b. ~1904 · Iowa
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Harrison-County, Iowa
Open full size
1940 US Federal Census — Harrison-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01166-00309)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Helen Pitt | 31 | Wife | — | Iowa |
| 2 | Gaylord Pitt | 8 | Son | — | Iowa |
| 3 | John Harper THIS PERSON | 36 | Head | Farming | Iowa |
| 4 | Tessa Harper | 33 | Wife | — | Iowa |
| 5 | Corrine Harper | 13 | Daughter | — | Iowa |
| 6 | Joanne Harper | 6 | Daughter | — | Iowa |
| 7 | William Vore | 43 | Head | — | Iowa |
| 8 | Ethel Vore | 41 | Wife | — | Iowa |
| 9 | Kenneth Vore | 17 | Son | Farming | Iowa |
| 10 | Genevieve Vore | 15 | Daughter | — | Iowa |
| 11 | Clayton Black | 48 | Head | Farming | Iowa |
| 12 | Elizabeth Black | 52 | Wife | — | Iowa |
| 13 | Elvin Black | 21 | Son | Farm Helper | Nebraska |
| 14 | Alta Mae Black | 12 | Daughter | — | Iowa |
| 15 | Bonita Lepue | 22 | Maid | Housework | Iowa |
| 16 | Virgil Baber | 32 | Hired help | Farm Laborer | Iowa |
| 17 | Lester Cooper | 23 | Hired help | Farm Laborer | Iowa |
| 18 | Ella Dunger | 71 | Head | — | Illinois |
| 19 | Walter Dunger | 40 | Son | Farmer | Iowa |
| 20 | Melvin Dunger | 35 | Son | Farmer | Iowa |
| 21 | Herman Knause | 38 | Head | Section Hand | Iowa |
| 22 | Lucille Hamann | 20 | Housekeeper | Housekeeper | Iowa |
| 23 | Grover Armstrong | 44 | Head | Highway Worker | Iowa |
| 24 | Elizabeth Armstrong | 31 | Wife | — | Iowa |
| 25 | Leonard Armstrong | 14 | Son | — | Iowa |
| 26 | Charles Armstrong | 12 | Son | — | Iowa |
| 27 | Alice Armstrong | 10 | Daughter | — | Iowa |
| 28 | Delia Armstrong | 9 | Daughter | — | Iowa |
| 29 | Dixie Armstrong | 7 | Daughter | — | Iowa |
| 30 | Lorna Armstrong | 6 | Daughter | — | Iowa |
| 31 | Twyla Armstrong | 4 | Daughter | — | Iowa |
| 32 | William Armstrong | 1 | Son | — | Iowa |
| 33 | Donald Armstrong | 0 | Son | — | Iowa |
| 34 | John L. Fahrenkrog | 65 | Head | Farming | Iowa |
| 35 | Anna Fahrenkrog | 62 | Wife | Farming | Germany |
| 36 | Mabel Fahrenkrog | 35 | Daughter | — | Iowa |
| 37 | Frank S. Harter | 42 | Head | Farming | Iowa |
| 38 | Rachel Harter | 42 | Wife | — | Iowa |
| 39 | Mildred Harter | 8 | Daughter | — | Iowa |
| 40 | Lillian Harter | 6 | Daughter | — | Iowa |
Pedigree Summary
John
Gen 1 · 2 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)