JT
John Thompson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Marshall-County, Indiana
Our Model Tree links this John Thompson across the 1920, 1930 and 1940 US Censuses in Marshall-County, Indiana (XGBoost, ~Confirmed), with identified parents Ora & John — first a son (b.~1919), then head of a 3-person household.
Age 21
b. ~1919
Male
Son
Born: Indiana
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Marshall-County, Indiana |
| Surname | Thompson |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Argos |
| 1935 Residence (County) | Marshall |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farming |
| Class of Worker | PW |
| Hours Worked | 70 |
| Income (1939) | 800 |
| Highest Grade | H 4 |
| 1935 Residence | Indiana |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Occupation | Farmer |
| Township / Ward | Green Twp |
| 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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Eileen Thompson | Daughter | — | 14 | ~1926 |
| Cora Thompson | Head | — | 42 | ~1898 |
| John Thompson | Son | — | 21 | ~1919 |
Census Appearances
1920
Marshall, Indiana
Son, age 1
Marshall, Indiana · implied b. ~1919 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thompson |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Indiana |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1930
Marshall, Indiana
Son, age 11
Marshall, Indiana · implied b. ~1919 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thompson |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| 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
Marshall-County, Indiana
Son, age 21
Marshall-County, Indiana · implied b. ~1919 — 3 household members
| Surname | Thompson |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Argos |
| 1935 Residence (County) | Marshall |
| Occupation | Farmer |
| Industry | Farming |
| Class of Worker | PW |
| Hours Worked | 70 |
| Income (1939) | 800 |
| Highest Grade | H 4 |
| 1935 Residence | Indiana |
| 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 Thompson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Ora Thompson (~0.92 confidence) and father John Thompson (~0.83 confidence) and father John Thompson (~0.83 confidence) and mother Mary Thompson (~0.83 confidence) and mother Alma Thompson (~0.83 confidence) and mother Cora Thompson (~0.92 confidence) and mother Cora Thompson (~0.92 confidence). The pedigree spans 2 generations with 7 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.87
Father
Ora Thompson
b. ~1891
Source father
● Household
· direct · ~0.92
Father
John Thompson
b. ~1868
Source father>father
● Household
· direct · ~0.83
Father
John Thompson
b. ~1868
Source father>father
● Household
· direct · ~0.83
Mother
Mary Thompson
b. ~1866
Source father>mother
● Household
· direct · ~0.83
Mother
Alma Thompson
b. ~1866
Source father>mother
● Household
· direct · ~0.83
Mother
Cora Thompson
b. ~1898
Source mother
● Household
· direct · ~0.92
Mother
Cora Thompson
b. ~1893
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Thompson
Son · 1940 · age 21 · b. ~1919 · Indiana
★ You are viewing this record
Sibling
Eileen Thompson
Sibling · 1940 · age 14
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 — 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-t0627-01077-00416)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Claire Gohns | 50 | Wife | — | Indiana |
| 2 | Mary Gohns | 17 | Daughter | — | Indiana |
| 3 | Sue Gohns | 13 | Daughter | — | Indiana |
| 4 | Stephen Savage | 39 | Head | Farmer | Indiana |
| 5 | Grace V. Savage | 35 | Wife | Farmer | Indiana |
| 6 | Wanda Savage | 3 | Daughter | — | Indiana |
| 7 | Daniel Savage | 0 | Son | — | Indiana |
| 8 | Alain Mahler | 20 | Cousin | Assistant In The Culver Military Academy | Indiana |
| 9 | Walter Shivers | 64 | Head | Farmer | Illinois |
| 10 | Jessie Shivers | 59 | Wife | — | Indiana |
| 11 | James Ballinger | 38 | Head | Working On Punch Press | Indiana |
| 12 | Mabel Ballinger | 29 | Wife | Farmer | Indiana |
| 13 | Eileen Ballinger | 10 | Daughter | — | Indiana |
| 14 | Dennis Ballinger | 6 | Son | — | Indiana |
| 15 | Nedra Ballinger | 1 | Daughter | — | Indiana |
| 16 | Brother Miller | 28 | Brother | Laborer | Indiana |
| 17 | Edward Personett | 73 | Head | Farmer | Indiana |
| 18 | Mary Personett | 70 | Wife | — | Indiana |
| 19 | Cora Thompson | 42 | Head | — | Indiana |
| 20 | John Thompson THIS PERSON | 21 | Son | Farmer | Indiana |
| 21 | Eileen Thompson | 14 | Daughter | — | Indiana |
| 22 | David Smick | 55 | Head | Farmer | Indiana |
| 23 | Nora Smick | 55 | Wife | — | Indiana |
| 24 | Lee Personett | 68 | Head | Farmer | Indiana |
| 25 | Gladys Personett | 55 | Wife | — | Indiana |
| 26 | Marvin Ellis | 22 | Head | Farmer | Indiana |
| 27 | Clara Ellis | 23 | Wife | — | Indiana |
| 28 | Robert L. Ellis | 0 | Son | — | Indiana |
| 29 | Isaac Horn | 53 | Head | Farmer | Ohio |
| 30 | Harry Dille | 58 | Head | Farmer | Indiana |
| 31 | Cora Lester | 58 | Housekeeper | Housekeeper | Indiana |
| 32 | Nathan Fletcher | 58 | Head | Farmer | Indiana |
| 33 | Alice Fletcher | 50 | Wife | — | Ohio |
| 34 | Willard Fletcher | 16 | Son | — | Indiana |
| 35 | Dean Fletcher | 13 | Son | — | Indiana |
| 36 | Charles E. Anderson | 57 | Head | Private | Sweden |
| 37 | Melvina Anderson | 53 | Wife | — | Illinois |
| 38 | Calvin Zartman | 28 | Head | Farmer | Indiana |
| 39 | Hazel Zartman | 29 | Wife | — | Indiana |
| 40 | Thelma Zartman | 7 | Daughter | — | Indiana |
Pedigree Summary
John + 1 sibling
Gen 1 · 3 parents
~0.92
Gen 2 · 4 grandparents
~0.83
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)