HT
Harold Thomas — 1940 US Census Record
Model Tree available1940 United States Federal Census · Mclean-County, Illinois
Our Model Tree links this Harold Thomas across the 1920, 1930 and 1940 US Censuses in Mclean-County, Illinois (XGBoost, ~Confirmed), with identified parents Floyd & Loyd — first a head (b.~1913), then head of a 3-person household.
Age 27
b. ~1913
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Mclean-County, Illinois |
| Surname | Thomas |
| Given Name | Harold |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | R |
| 1935 Residence (County) | R |
| Additional Details | |
| Occupation | Salesman |
| Industry | Implement Co |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 1800 |
| Highest Grade | C 1-H 4 |
| 1935 Residence | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Salesman |
| Township / Ward | Bloomington City |
| Est. Birth Year | ~1913 |
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 Harold | Age | Birth yr |
|---|---|---|---|---|
| Larry Thomas | Son | — | 1 | ~1939 |
| Nellie Thomas | Spouse | — | 22 | ~1918 |
| Harold Thomas | Head | — | 27 | ~1913 |
Census Appearances
1920
Mclean, Illinois
Son, age 7
Mclean, Illinois · implied b. ~1913 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Harold |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Mclean, Illinois
Son, age 17
Mclean, Illinois · implied b. ~1913 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Harold |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Mclean-County, Illinois
Head, age 27
Mclean-County, Illinois · implied b. ~1913 — 3 household members
| Surname | Thomas |
| Given Name | Harold |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | R |
| 1935 Residence (County) | R |
| Occupation | Salesman |
| Industry | Implement Co |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 1800 |
| Highest Grade | C 1-H 4 |
| 1935 Residence | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 Thomas across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Floyd Thomas (~0.92 confidence) and father Loyd Thomas (~0.92 confidence) and mother Ruth Thomas (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Floyd Thomas
b. ~1889
Source father
● Household
· direct · ~0.92
Father
Loyd Thomas
b. ~1889
Source father
● Household
· direct · ~0.92
Mother
Ruth Thomas
b. ~1893
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Harold Thomas
Head · 1940 · age 27 · b. ~1913 · Illinois
★ 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 — Mclean-County, Illinois
Open full size
1940 US Federal Census — Mclean-County, Illinois
Page Contents
35 people indexed on this census page (nara:1940:m-t0627-00841-00739)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 2 | William Loveland | 35 | Head | Painter | Oklahoma |
| 3 | Maxine Loveland | 15 | Daughter | — | Illinois |
| 4 | Bobby Loveland | 13 | Son | — | Illinois |
| 6 | Joseph W. Champ | 53 | Head | Painter | Illinois |
| 7 | Lydia Champ | 18 | Son | Operator | Louisiana |
| 8 | Roland Behrend | 34 | Head | Foreman | Illinois |
| 9 | Nellie Behrend | 37 | Wife | Clerk | Illinois |
| 10 | Joan Behrend | 5 | Daughter | — | Illinois |
| 11 | George Goodspeed | 75 | Father-in-law | — | Illinois |
| 12 | Katherine Goodspeed | 74 | Mother-in-law | — | Germany |
| 13 | William Hart | 77 | Head | — | Illinois |
| 14 | Carrie Hart | 74 | Wife | — | Illinois |
| 15 | Marvin Erickson | 40 | Son-in-law | Pipe Fitter | Illinois |
| 16 | Helen Erickson | 37 | Daughter | — | Illinois |
| 18 | Edward Ingler | 51 | Head | Laborer | Illinois |
| 19 | Flora Ingler | 44 | Wife | — | Illinois |
| 20 | Margaret Hard | 80 | Mother-in-law | — | Indiana |
| 21 | J. Frank Gazelle | 54 | Head | Fireman | Illinois |
| 22 | Elva Gazelle | 44 | Wife | — | Illinois |
| 23 | Irene Gazelle | 8 | Daughter | — | Illinois |
| 24 | Phyllis Gazelle | 6 | Daughter | — | Illinois |
| 25 | Abe Gazelle | 70 | Brother | — | Holland |
| 26 | Harold Thomas THIS PERSON | 27 | Head | Salesman | Illinois |
| 27 | Nellie Thomas | 22 | Wife | — | Illinois |
| 28 | Larry Thomas | 1 | Son | — | Illinois |
| 30 | Frank E. Harvey | 45 | Head | Night Watchman | Illinois |
| 31 | Jennie Harvey | 43 | Wife | — | Illinois |
| 32 | Winifred Harvey | 19 | Daughter | New Worker | Ohio |
| 33 | Frank Harvey | 18 | Son | — | Illinois |
| 34 | Dixon Harvey | 16 | Son | — | Ohio |
| 35 | Jeanette Harvey | 0 | Daughter | — | Illinois |
| 36 | Oscar C. Foster | 36 | Head | Machinist | Illinois |
| 37 | Florence Foster | 36 | Wife | — | Missouri |
| 38 | Donald Foster | 15 | Son | — | Illinois |
| 39 | Norma Foster | 11 | Daughter | — | Illinois |
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)