JT
James Thompson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Lemhi-County, Idaho
Our Model Tree links this James Thompson across the 1920, 1930 and 1940 US Censuses in Lemhi-County, Idaho (XGBoost, ~Confirmed), with identified parents James & James — first a head (b.~1918), then head of a 3-person household.
Age 22
b. ~1918
Male
Head
Born: Idaho
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Lemhi-County, Idaho |
| Surname | Thompson |
| Given Name | James D. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Married |
| Birthplace | Idaho |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Lemhi |
| Additional Details | |
| Occupation | Miner |
| Industry | Iron Mine |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 1200 |
| Highest Grade | H-4 |
| 1935 Residence | Idaho |
| Birth State | Idaho |
| Birth Country | United States |
| Birthplace (normalized) | idaho |
| Occupation | Miner |
| Township / Ward | Patterson Prec |
| Est. Birth Year | ~1918 |
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 James | Age | Birth yr |
|---|---|---|---|---|
| June Thompson | Daughter | — | 1 | ~1939 |
| James Thompson | Head | — | 22 | ~1918 |
| Gladis Thompson | Spouse | — | 22 | ~1918 |
Census Appearances
1920
Lemhi, Idaho
Son, age 1
Lemhi, Idaho · implied b. ~1919 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thompson |
| Given Name | James G. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Idaho |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Idaho |
| Birth State | Idaho |
| Birth Country | United States |
| Birthplace (normalized) | idaho |
1930
Lemhi, Idaho
Son, age 12
Lemhi, Idaho · implied b. ~1918 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thompson |
| Given Name | James L |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Idaho |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Idaho |
| Birth State | Idaho |
| Birth Country | United States |
| Birthplace (normalized) | idaho |
1940
Lemhi-County, Idaho
Head, age 22
Lemhi-County, Idaho · implied b. ~1918 — 3 household members
| Surname | Thompson |
| Given Name | James D. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Married |
| Birthplace | Idaho |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Lemhi |
| Occupation | Miner |
| Industry | Iron Mine |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 1200 |
| Highest Grade | H-4 |
| 1935 Residence | Idaho |
| Birth State | Idaho |
| Birth Country | United States |
| Birthplace (normalized) | idaho |
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 James Thompson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father James Thompson (~0.92 confidence) and father James Thompson (~0.92 confidence) and mother Lilian Thompson (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
James Thompson
b. ~1888
Source father
● Household
· direct · ~0.92
Father
James Thompson
b. ~1891
Source father
● Household
· direct · ~0.92
Mother
Lilian Thompson
b. ~1898
Source mother
● Household
· direct · ~0.92
This person
Anchor record
James Thompson
Head · 1940 · age 22 · b. ~1918 · Idaho
★ 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 — Lemhi-County, Idaho
Open full size
1940 US Federal Census — Lemhi-County, Idaho
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00750-00227)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Norman Fleck | 3 | Son | — | Utah |
| 2 | May Fleck | 2 | Daughter | — | Utah |
| 3 | Allen A. Smith | 28 | Head | Miner | Utah |
| 4 | Millie G. Smith | 20 | Wife | — | Utah |
| 5 | Donna M. Smith | 2 | Daughter | — | Utah |
| 6 | Allen A. Jr. Smith | 1 | Son | — | Idaho |
| 7 | James F. Donaldson | 31 | Head | Miner | Missouri |
| 8 | Ethel Donaldson | 31 | Wife | — | Missouri |
| 9 | Norma J. Donaldson | 11 | Daughter | — | Missouri |
| 10 | Betty L. Donaldson | 3 | Daughter | — | Missouri |
| 11 | James F. Jr. Donaldson | 2 | Son | — | Idaho |
| 12 | Charles Sater | 27 | Head | Miner | Idaho |
| 13 | Mitta P. Sater | 20 | Wife | — | Idaho |
| 14 | Charles P. Sater | 2 | Son | — | Idaho |
| 15 | James D. Thompson THIS PERSON | 22 | Head | Miner | Idaho |
| 16 | Gladis Thompson | 22 | Wife | — | Michigan |
| 17 | June L. Thompson | 1 | Daughter | — | Idaho |
| 18 | Don D. Rodgers | 31 | Head | Miner | Missouri |
| 19 | Lily Rodgers | 29 | Wife | Waitress | Missouri |
| 20 | George A. Smith | 44 | Head | Miner | Idaho |
| 21 | Jessie A. Smith | 21 | Wife | — | Montana |
| 22 | Jack H. Selzer | 25 | Head | Miner | Oklahoma |
| 23 | Addie Selzer | 23 | Wife | — | Idaho |
| 24 | Kay Frances Selzer | 2 | Daughter | — | Idaho |
| 25 | Janet Selzer | 0 | Daughter | — | Idaho |
| 26 | Claude R. Parsons | 31 | Head | Timber Man | Kansas |
| 27 | Jessie Parsons | 27 | Wife | Postmistress | Idaho |
| 28 | Armin A. Rist | 27 | Head | School Teacher | Texas |
| 29 | Aloune Rist | 27 | Wife | School Teacher | Idaho |
| 30 | S. J. Perry | 48 | Head | Miner | Idaho |
| 31 | Julie Perry | 48 | Wife | — | Denmark |
| 32 | Clarence A. Messer | 52 | Head | Store Keeper | Iowa |
| 33 | Alvina A. Messer | 44 | Wife | — | Missouri |
| 34 | Julie Parfitt | 85 | Mother in law | — | Utah |
| 35 | Hubbard Parfitt | 22 | Daughter | Clerk | Missouri |
| 36 | James Yoder | 22 | Boarder | Laborer | Missouri |
| 37 | Thomas J. Mackey | 21 | Head | 90 | Idaho |
| 38 | Leona Mackey | 18 | Wife | — | Idaho |
| 39 | Alice Leach | 17 | Sister in law | — | Idaho |
| 40 | Helen Leach | 16 | Sister in law | — | Idaho |
Pedigree Summary
James
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)