JP
John Peterson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Wapello-County, Iowa
Our Model Tree links this John Peterson across the 1920, 1930 and 1940 US Censuses in Wapello-County, Iowa (XGBoost, ~Confirmed), with identified parents Harry & Henry — first a son (b.~1919), then head of a 4-person household.
Age 21
b. ~1919
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Wapello-County, Iowa |
| Surname | Peterson |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Ottumwa City |
| 1935 Residence (County) | Wapello County |
| Additional Details | |
| Occupation | Typist |
| Industry | Meat Packing |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 2080 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Typist |
| Township / Ward | Ottumwa City |
| Est. Birth Year | ~1919 |
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 |
|---|---|---|---|---|
| Marion Peterson | Daughter | — | 24 | ~1916 |
| Harry Peterson | Head | — | 53 | ~1887 |
| John Peterson | Son | — | 21 | ~1919 |
| Lorene Peterson | Spouse | — | 53 | ~1887 |
Census Appearances
1920
Wapello, Iowa
Son, age 1
Wapello, Iowa · implied b. ~1919 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| 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 11
Wapello, Iowa · implied b. ~1919 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | John E |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Iowa |
| Age at First Marriage | No |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Wapello-County, Iowa
Son, age 21
Wapello-County, Iowa · implied b. ~1919 — 4 household members
| Surname | Peterson |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Ottumwa City |
| 1935 Residence (County) | Wapello County |
| Occupation | Typist |
| Industry | Meat Packing |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 2080 |
| 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 Peterson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Harry Peterson (~0.92 confidence) and father Henry Peterson (~0.92 confidence) and father Harry Peterson (~0.92 confidence) and mother Lorene Peterson (~0.92 confidence) and mother Lorene Peterson (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Harry Peterson
b. ~1887
Source father
● Household
· direct · ~0.92
Father
Henry Peterson
b. ~1886
Source father
● Household
· direct · ~0.92
Father
Harry Peterson
b. ~1886
Source father
● Household
· direct · ~0.92
Mother
Lorene Peterson
b. ~1887
Source mother
● Household
· direct · ~0.92
Mother
Lorene Peterson
b. ~1887
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Peterson
Son · 1940 · age 21 · b. ~1919 · Iowa
★ You are viewing this record
Sibling
Marion Peterson
Sibling · 1940 · age 24
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
38 people indexed on this census page (nara:1940:m-t0627-01209-00299)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Thomas A. Mellissing | Millissing | 76 | Head | Proprietor | N. Wales |
| 2 | Elizabeth Mellissing | Millissing | 74 | Wife | — | S. Wales |
| 3 | Harry E. Peterson | 53 | Head | Shoe Salesman | Iowa |
| 4 | Lorene A. Peterson | 53 | Wife | Sales Lady | Iowa |
| 5 | Marion D. Peterson | 24 | Daughter | Np | Iowa |
| 6 | John Peterson THIS PERSON | 21 | Son | Typist | Iowa |
| 7 | N. O. Nelson | 77 | Head | — | Sweden |
| 8 | Hulda O. Nelson | 75 | Wife | — | Sweden |
| 9 | Mildred Swanson | 32 | Daughter | — | Iowa |
| 10 | Gail R. Swanson | 40 | Son-in-law | Buyer | Iowa |
| 11 | John A. Swanson | 8 | Grandson | — | Missouri |
| 12 | Robert S. Young | 30 | Head | Mine Engineer | Iowa |
| 13 | Dorothy D. Young | 28 | Wife | — | Iowa |
| 14 | Vernon Young | 6 | Son | — | Iowa |
| 15 | John Young | 4 | Son | — | Iowa |
| 16 | Joseph Young | 1 | Son | — | Iowa |
| 17 | Clarence Young | 39 | Head | Post Clerk | Iowa |
| 18 | Bernice Young | 35 | Wife | Dairy Supervisor | Minnesota |
| 19 | Louis J. Snyder | 40 | Head | Trucking | Iowa |
| 20 | Elvera D. Snyder | 38 | Wife | — | Iowa |
| 21 | Mies Ann Griswold | 58 | Head | Abstractor | Iowa |
| 22 | Margaret Gittens | 70 | Sister | — | Iowa |
| 23 | Donald Gittens | 31 | Nephew | Investigator | Iowa |
| 24 | Nancy Gittens | 2 | Grandniece | — | Iowa |
| 25 | Alexander Bartram | Bertram | 50 | Head | Dentist | Russia |
| 26 | Grace M. Bartram | Bertram | 50 | Wife | — | S. Dakota |
| 27 | James A. Bartram | Bertram | 18 | Son | 0 | Iowa |
| 28 | Barbara G. Bartram | Bertram | 16 | Daughter | 0 | Iowa |
| 29 | Bob A. Bartram | Bertram | 13 | Son | — | Iowa |
| 30 | Joseph T. Funk | 38 | Head | Teller | Iowa |
| 31 | Dorothy D. Funk | 37 | Wife | — | Iowa |
| 32 | Richard Funk | 17 | Son | — | Iowa |
| 33 | C. R. Houk | Honk | 39 | Head | Machine Operator | Iowa |
| 34 | Lola D. Houk | Honk | 40 | Wife | — | Iowa |
| 35 | Donna Houk | Honk | 12 | Daughter | — | Iowa |
| 36 | Bonnie Houk | Honk | 10 | Daughter | — | Iowa |
| 37 | Agnes M. Summers | 47 | Head | — | Iowa |
| 38 | Lola D. Summers | 23 | Daughter | — | Illinois |
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)