JP
John Peterson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Marshall-County, Indiana
Our Model Tree links this John Peterson across the 1920, 1930 and 1940 US Censuses in Marshall-County, Indiana (XGBoost, ~Confirmed), with identified parents Charles & Charles — first a son (b.~1917), then head of a 3-person household.
Age 23
b. ~1917
Male
Son
Born: Indiana
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Marshall-County, Indiana |
| Surname | Peterson |
| Given Name | John A. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Polk Twp. |
| 1935 Residence (County) | Marshall |
| Additional Details | |
| Occupation | Farmer |
| Industry | general |
| Class of Worker | OA |
| Hours Worked | 60 |
| Income (1939) | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same house |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Occupation | Farmer |
| Township / Ward | Polk Twp |
| 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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Charles Peterson | Head | — | 66 | ~1874 |
| John Peterson | Son | — | 23 | ~1917 |
| Amanda Peterson | Spouse | — | 61 | ~1879 |
Census Appearances
1920
Marshall, Indiana
Son, age 3
Marshall, Indiana · implied b. ~1917 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | John A |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1930
Marshall, Indiana
Son, age 13
Marshall, Indiana · implied b. ~1917 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | John A |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Can Read/Write | Yes |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1940
Marshall-County, Indiana
Son, age 23
Marshall-County, Indiana · implied b. ~1917 — 3 household members
| Surname | Peterson |
| Given Name | John A. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Polk Twp. |
| 1935 Residence (County) | Marshall |
| Occupation | Farmer |
| Industry | general |
| Class of Worker | OA |
| Hours Worked | 60 |
| Income (1939) | 0 |
| Highest Grade | Hs 4 |
| 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 John Peterson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Charles Peterson (~0.92 confidence) and father Charles Peterson (~0.92 confidence) and father Charles Peterson (~0.92 confidence) and mother Amanda Peterson (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Charles Peterson
b. ~1874
Source father
● Household
· direct · ~0.92
Father
Charles Peterson
b. ~1845
Source father
● Household
· direct · ~0.92
Father
Charles Peterson
b. ~1874
Source father
● Household
· direct · ~0.92
Mother
Amanda Peterson
b. ~1879
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Peterson
Son · 1940 · age 23 · b. ~1917 · Indiana
★ 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 — Marshall-County, Indiana
Open full size
1940 US Federal Census — Marshall-County, Indiana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01077-00518)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Arthur Mcchristian | 55 | Head | Laborer | Indiana |
| 2 | Pearl E. Mcchristian | 40 | wife | — | Indiana |
| 3 | Mary L. Mcchristian | 15 | daughter | — | Indiana |
| 4 | Mabelle J. Mcchristian | 13 | daughter | — | Indiana |
| 5 | Arthur Jr. Mcchristian | 11 | son | — | Indiana |
| 6 | Veneda M. Mcchristian | 6 | daughter | — | Indiana |
| 7 | Russel G. Mcchristian | 2 | son | — | Indiana |
| 8 | Vennie S. Berglund | 49 | Head | — | Indiana |
| 9 | Lawrence Berglund | 27 | son | Farmer | Indiana |
| 10 | Charles Peterson | 66 | Head | Farmer | Sweden |
| 11 | Amanda Peterson | 61 | wife | — | Sweden |
| 12 | John A. Peterson THIS PERSON | 23 | son | Farmer | Indiana |
| 13 | Arvid Holm | 61 | Head | Farmer | Sweden |
| 14 | Matilda Holm | 61 | wife | — | Sweden |
| 15 | Elmer M. Holm | 29 | son | Farmer | Indiana |
| 16 | Laverne A. Holm | 23 | daughter-in-law | — | Illinois |
| 17 | Adele Ruth Holm | 3 | granddaughter | — | Indiana |
| 18 | Eugene M. Holm | 1 | grandson | — | Indiana |
| 19 | Ida Jensen | 75 | Head | — | Sweden |
| 20 | Caroline Erickson | 69 | Head | — | Sweden |
| 21 | Bernard B. Erickson | 29 | son | Farmer | Illinois |
| 22 | Florence M. Erickson | 19 | daughter-in-law | — | Indiana |
| 23 | Bernard Jr. Erickson | 0 | grandson | — | Indiana |
| 24 | Nils T. Lindstrom | 63 | Head | Farmer | Sweden |
| 25 | Hannah Lindstrom | 71 | wife | — | Sweden |
| 26 | Huldah Olson | 70 | Head | — | Sweden |
| 27 | Morton H. Masterson | 38 | Head | Laborer | Indiana |
| 28 | Ruth B. Masterson | 36 | wife | — | Indiana |
| 29 | Wanda M. Masterson | 14 | daughter | — | Indiana |
| 30 | Morton Jr. Masterson | 12 | son | — | Indiana |
| 31 | Homer Ray Masterson | 11 | son | — | Indiana |
| 32 | Minnie Warner | 50 | Head | — | Indiana |
| 33 | Charles Warner | 18 | son | New Worker | Indiana |
| 34 | George Alinedinst | 33 | Head | Polisher | Indiana |
| 35 | Elnora Alinedinst | 33 | wife | — | Indiana |
| 36 | Mabel Fay Alinedinst | 7 | daughter | — | Indiana |
| 37 | David M. Oberg | 50 | Head | Farmer | Illinois |
| 38 | Lilly B. Oberg | 37 | wife | Cook | Illinois |
| 39 | Arlene M. Oberg | 18 | daughter | New Worker | Indiana |
| 40 | Emil J. Oberg | 13 | son | — | Indiana |
Pedigree Summary
John
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)