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 Orlando & Orlando — first a son (b.~1912), then head of a 4-person household.
Age 28
b. ~1912
Male
Son
Born: Indiana
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Marion-County, Indiana |
| Surname | Thompson |
| Given Name | Harold G |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Indianapolis |
| 1935 Residence (County) | Marion |
| Additional Details | |
| Occupation | Machinist |
| Industry | Moulding Co |
| Class of Worker | PW |
| Hours Worked | 42 |
| Income (1939) | 834 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same House |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Occupation | Machinist |
| Township / Ward | Indianapolis |
| Est. Birth Year | ~1912 |
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 Harold | Age | Birth yr |
|---|---|---|---|---|
| Unice Thompson | Daughter | — | 23 | ~1917 |
| Orlando Thompson | Head | — | 49 | ~1891 |
| Harold Thompson | Son | — | 28 | ~1912 |
| Bertha Thompson | Spouse | — | 48 | ~1892 |
Census Appearances
1920
Marion, Indiana
Son, age 8
Marion, Indiana · implied b. ~1912 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thompson |
| Given Name | Harold G. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Indiana |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1930
Marion, Indiana
Son, age 18
Marion, Indiana · implied b. ~1912 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thompson |
| Given Name | Harold G. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| 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
Marion-County, Indiana
Son, age 28
Marion-County, Indiana · implied b. ~1912 — 4 household members
| Surname | Thompson |
| Given Name | Harold G |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Indianapolis |
| 1935 Residence (County) | Marion |
| Occupation | Machinist |
| Industry | Moulding Co |
| Class of Worker | PW |
| Hours Worked | 42 |
| Income (1939) | 834 |
| 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 Harold Thompson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Orlando Thompson (~0.92 confidence) and father Orlando Thompson (~0.92 confidence) and mother Bertha Thompson (~0.92 confidence) and mother Bertha Thompson (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Orlando Thompson
b. ~1881
Source father
● Household
· direct · ~0.92
Father
Orlando Thompson
b. ~1891
Source father
● Household
· direct · ~0.92
Mother
Bertha Thompson
b. ~1892
Source mother
● Household
· direct · ~0.92
Mother
Bertha Thompson
b. ~1893
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Harold Thompson
Son · 1940 · age 28 · b. ~1912 · Indiana
★ You are viewing this record
Sibling
Unice Thompson
Sibling · 1940 · age 23
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 — 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-t0627-01075-00690)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Jack E Van Horn | 4 | Grandson | — | Indiana |
| 42 | Orlando Thompson | 49 | Head | Metal Polisher | Indiana |
| 43 | Bertha G Thompson | 48 | Wife | — | Indiana |
| 44 | Harold G Thompson THIS PERSON | 28 | Son | Machinist | Indiana |
| 45 | Unice H Thompson | 23 | Daughter | Folder | Indiana |
| 46 | Stanley Noel | 54 | Head | Repair Man | Kentucky |
| 47 | Bessie W Noel | 50 | Wife | — | Kentucky |
| 48 | Leon L Noel | 14 | Son | — | Indiana |
| 49 | Robert F Peale | 48 | Head | Machinist | New Jersey |
| 50 | Edith M Peale | 42 | Wife | — | Indiana |
| 51 | Wilma G Peale | 18 | Daughter | — | Wisconsin |
| 52 | Robert J Peale | 17 | Son | — | Wisconsin |
| 53 | Virginia J Peale | 14 | Daughter | — | Indiana |
| 54 | John C Peale | 11 | Son | — | Indiana |
| 55 | Stanton J Peale | 3 | Son | — | Indiana |
| 56 | Paul G Mccormick | 53 | Head | Mailman | Indiana |
| 57 | Essie E Mccormick | 45 | Wife | — | Kentucky |
| 58 | Charles H Mishell | 22 | Brother in law | — | Kentucky |
| 59 | Cary Mishell | 48 | Sister in law | Laborer | Kentucky |
| 60 | Carroll O Campbell | 33 | Head | Draftsman | Indiana |
| 61 | Beatrice M Campbell | 28 | Wife | — | Indiana |
| 62 | James M Campbell | 4 | Son | — | Indiana |
| 63 | Margaret E Campbell | 2 | Daughter | — | Indiana |
| 64 | Barbara E Campbell | 0 | Daughter | — | Indiana |
| 65 | Elmer M Marshall | 26 | Head | Laborer | Indiana |
| 66 | Irene M Marshall | 24 | Wife | — | Indiana |
| 67 | James E Marshall | 3 | Son | — | Indiana |
| 68 | Mary M Cresay | 57 | Head | — | Indiana |
| 69 | James R Cresay | 27 | Son | Punch Pr. Operator | Indiana |
| 70 | Kenneth P Cresay | 19 | Son | Refinisher | Indiana |
| 71 | Edward B Cresay | 17 | Son | — | Indiana |
| 72 | Anna E Cresay | 14 | Daughter | — | Indiana |
| 73 | Donald C Cresay | 11 | Son | — | Indiana |
| 74 | Anna Bader | 68 | Mother | — | Indiana |
| 75 | Charles E Mears | 79 | Head | Minister | Ohio |
| 76 | Margaret E Mears | 69 | Wife | — | England |
| 77 | Lowell G Mchamell | 20 | Head | — | Indiana |
| 78 | Merrill B Mchamell | 22 | Son | Motor Driver | Indiana |
| 79 | Clara K Mchamell | 49 | Mother | Housekeeper | Indiana |
| 80 | Harlan L Mchamell | 18 | Son | — | Indiana |
Pedigree Summary
Harold + 1 sibling
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)