HT
Harold Thompson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Marion-County, Indiana
Our Model Tree links this Harold Thompson across the 1920, 1930 and 1940 US Censuses in Marion-County, Indiana (XGBoost, ~Confirmed), with identified parents William & Gertrude — first a head (b.~1915), then head of a 5-person household.
Age 25
b. ~1915
Male
Head
Born: Indiana
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Marion-County, Indiana |
| Surname | Thompson |
| Given Name | Harold E. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Indiana |
| 1935 Residence (City) | Indianapolis |
| 1935 Residence (County) | Marion |
| Additional Details | |
| Occupation | Truck Driver |
| Industry | Hauling |
| Class of Worker | OA |
| Hours Worked | 54 |
| Income (1939) | 400 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Occupation | Truck Driver |
| Township / Ward | Indianapolis |
| Est. Birth Year | ~1915 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Harold | Age | Birth yr |
|---|---|---|---|---|
| Harold Thompson | Head | — | 25 | ~1915 |
| Max Thompson | Son | — | 3 | ~1937 |
| David Thompson | Son | — | 1 | ~1939 |
| Harold Thompson | Son | — | 5 | ~1935 |
| Anna Thompson | Spouse | — | 21 | ~1919 |
Census Appearances
1920
Marion, Indiana
Son, age 5
Marion, Indiana · implied b. ~1915 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thompson |
| Given Name | Harold |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Indiana |
| Occupation | none |
| Can Read | No |
| Can Write | No |
| Speaks English | No |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1930
Marion, Indiana
Son, age 15
Marion, Indiana · implied b. ~1915 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thompson |
| Given Name | Harold |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Indiana |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1940
Marion-County, Indiana
Head, age 25
Marion-County, Indiana · implied b. ~1915 — 5 household members
| Surname | Thompson |
| Given Name | Harold E. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Indiana |
| 1935 Residence (City) | Indianapolis |
| 1935 Residence (County) | Marion |
| Occupation | Truck Driver |
| Industry | Hauling |
| Class of Worker | OA |
| Hours Worked | 54 |
| Income (1939) | 400 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| 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 Harold Thompson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father William Thompson (~0.92 confidence) and mother Gertrude Thompson (~0.92 confidence) and mother Gertrude Thompson (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Thompson
b. ~1888
Source father
● Household
· direct · ~0.92
Mother
Gertrude Thompson
b. ~1892
Source mother
● Household
· direct · ~0.92
Mother
Gertrude Thompson
b. ~1892
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Harold Thompson
Head · 1940 · age 25 · b. ~1915 · 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 — Marion-County, Indiana
Open full size
1940 US Federal Census — Marion-County, Indiana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01124-00525)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Flora York | 39 | Wife | Laborer | Indiana |
| 42 | Arthur Brooks | 53 | Uncle | — | Indiana |
| 43 | Lloyd Mccallan | 21 | Step-son | Laborer | Indiana |
| 44 | William Mccallan | 19 | Step-son | Laborer | Indiana |
| 45 | Julia Mccallan | 15 | Step-daughter | — | Indiana |
| 46 | Francis Mccallan | 13 | Step-son | — | Indiana |
| 47 | Perry Land | 59 | Head | — | Indiana |
| 48 | Bertha M. Land | 54 | Wife | — | Indiana |
| 49 | Virgil Land | 17 | Son | Laborer | Indiana |
| 50 | Marietta Land | 14 | Daughter | — | Indiana |
| 51 | Edith Land | 12 | Daughter | — | Indiana |
| 52 | Sampey Muncy | 30 | Head | Laborer | W. Virginia |
| 53 | Hazel Muncy | 25 | Wife | — | Kentucky |
| 54 | Clarence E. Brooks | 47 | Head | Finisher | Indiana |
| 55 | Maude Brooks | 45 | Wife | — | Indiana |
| 56 | Gwendolyn Brooks | 9 | Daughter | — | Indiana |
| 57 | Charles A. Strong | 58 | Father-in-law | Farmer | Indiana |
| 58 | Henry Knight | 38 | Head | Truck Driver | Indiana |
| 59 | Laura Knight | 38 | Wife | — | Indiana |
| 60 | Virginia Knight | 17 | Daughter | New Worker | Indiana |
| 61 | Truman Knight | 14 | Son | — | Indiana |
| 62 | Joann Knight | 11 | Daughter | — | Indiana |
| 63 | Jerry Knight | 8 | Son | — | Indiana |
| 64 | Ulysses Knight | 4 | Son | — | Indiana |
| 65 | James Knight | 2 | Son | — | Indiana |
| 66 | Cary F. Symmes | 70 | Head | — | Indiana |
| 67 | Anna Symmes | 69 | Wife | — | Missouri |
| 68 | Louise Taylor | 28 | Niece | Store Clerk | Missouri |
| 69 | Charles L. Bell | 42 | Head | Stone Engraver | Indiana |
| 70 | Gertrude Bell | 44 | Wife | — | Indiana |
| 71 | Charles Jr. Bell | 7 | Son | — | Indiana |
| 72 | Gertrude Thompson | 17 | Daughter | — | Indiana |
| 73 | Alfred Thompson | 14 | Son | — | Indiana |
| 74 | Harold E. Thompson THIS PERSON | 25 | Head | Truck Driver | Indiana |
| 75 | Anna Bell Thompson | 21 | Wife | — | Indiana |
| 76 | Harold Jr. Thompson | 5 | Son | — | Indiana |
| 77 | Max Thompson | 3 | Son | — | Indiana |
| 78 | David O. Thompson | 1 | Son | — | Indiana |
| 79 | William Love | 31 | Head | Splicer Helper | Indiana |
| 80 | Mary Love | 28 | Wife | — | Indiana |
Pedigree Summary
Harold
Gen 1 · 3 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)