RS
Roy Smith — 1940 US Census Record
Model Tree available1940 United States Federal Census · Ada-County, Idaho
Our Model Tree links this Roy Smith across the 1920, 1930 and 1940 US Censuses in Ada-County, Idaho (XGBoost, ~Confirmed), with identified parents Charles & Lulu — first a head (b.~1915), then head of a 3-person household.
Age 25
b. ~1915
Male
Head
Born: Idaho
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Ada-County, Idaho |
| Surname | Smith |
| Given Name | Roy A |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Idaho |
| 1935 Residence (City) | adjacent to Boise |
| 1935 Residence (County) | Ada |
| Additional Details | |
| Occupation | lessee |
| Industry | service station |
| Class of Worker | OA |
| Hours Worked | 48 |
| Income (1939) | 151 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Idaho |
| Birth Country | United States |
| Birthplace (normalized) | idaho |
| Occupation | Lessee |
| Township / Ward | Adjacent To Boise |
| 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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Roy | Age | Birth yr |
|---|---|---|---|---|
| Roy Smith | Head | — | 25 | ~1915 |
| Donald Smith | Son | — | 1 | ~1939 |
| Margaret Smith | Spouse | — | 22 | ~1918 |
Census Appearances
1920
Ada, Idaho
Son, age 5
Ada, Idaho · implied b. ~1915 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | Roy A |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Idaho |
| Father's Birthplace | Colorado |
| Mother's Birthplace | Idaho |
| Occupation | none |
| Birth State | Idaho |
| Birth Country | United States |
| Birthplace (normalized) | idaho |
1930
Ada, Idaho
Son, age 15
Ada, Idaho · implied b. ~1915 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | Roy |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Idaho |
| Father's Birthplace | Colorado |
| Mother's Birthplace | Idaho |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Idaho |
| Birth Country | United States |
| Birthplace (normalized) | idaho |
1940
Ada-County, Idaho
Head, age 25
Ada-County, Idaho · implied b. ~1915 — 3 household members
| Surname | Smith |
| Given Name | Roy A |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Idaho |
| 1935 Residence (City) | adjacent to Boise |
| 1935 Residence (County) | Ada |
| Occupation | lessee |
| Industry | service station |
| Class of Worker | OA |
| Hours Worked | 48 |
| Income (1939) | 151 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| 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 Roy Smith across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Charles Smith (~0.92 confidence) and mother Lulu Smith (~0.92 confidence) and mother Rose Smith (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Charles Smith
b. ~1875
Source father
● Household
· direct · ~0.92
Mother
Lulu Smith
b. ~1883
Source mother
● Household
· direct · ~0.92
Mother
Rose Smith
b. ~1884
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Roy Smith
Head · 1940 · age 25 · b. ~1915 · 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 — Ada-County, Idaho
Open full size
1940 US Federal Census — Ada-County, Idaho
Page Contents
37 people indexed on this census page (nara:1940:m-t0627-00736-00054)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Leefer L Grossman | 70 | Mother in law | — | Tennessee |
| 42 | Bryan D Morton | 43 | Head | Laborer | Idaho |
| 43 | Irene Morton | 41 | Wife | — | Kentucky |
| 44 | Harold D Morton | 11 | Son | — | Idaho |
| 45 | Jerry D Morton | 8 | Son | — | Idaho |
| 46 | Terrell Morton | 2 | Son | — | Idaho |
| 47 | Rose A Jackson | 79 | Head | — | Kansas |
| 48 | William J Cooper | 45 | Head | Janitor | Idaho |
| 49 | Effie Cooper | 44 | Wife | — | Idaho |
| 51 | John L Stricklen | 38 | Head | Proprietor | West Virginia |
| 52 | Eva M Stricklen | 36 | Wife | — | West Virginia |
| 53 | Laura Lee Stricklen | 4 | Daughter | — | Idaho |
| 55 | George Han | 74 | Head | — | Missouri |
| 56 | George Jr Han | 29 | Head | Truck Driver | Idaho |
| 57 | Arlene R Han | 25 | Wife | — | Mississippi |
| 58 | Ronald L Han | 6 | Son | — | Idaho |
| 59 | John A Han | 3 | Son | — | Idaho |
| 60 | Frank L Howard | 43 | Head | Truck Driver | Illinois |
| 61 | Grace R Howard | 38 | Wife | Overseer | Kansas |
| 62 | Billie J Knight | 18 | Son | — | Idaho |
| 63 | Roy A Smith THIS PERSON | 25 | Head | Lessee | Idaho |
| 64 | Margaret A Smith | 22 | Wife | — | Washington |
| 65 | Donald L Smith | 1 | Son | — | Idaho |
| 66 | Thomas W Moore | 72 | Head | — | New York |
| 67 | Albert H Jarnigen | 63 | Head | — | Missouri |
| 68 | Robert Strasbaugh | 35 | Head | Mess Steward | Colorado |
| 69 | Edna J Strasbaugh | 32 | Wife | — | Montana |
| 70 | Charley L Thompson | 39 | Head | Teamster | Kansas |
| 71 | Irene B Thompson | 30 | Wife | Waitress | Oregon |
| 72 | Alva Read | 70 | Head | — | Utah |
| 73 | Irene K Read | 64 | Wife | — | Utah |
| 74 | Forrest D Read | 22 | Son | Laborer | Idaho |
| 75 | Dennis E Flake | 28 | Son | Laborer | Arizona |
| 76 | Carol H Flake | 26 | Daughter | — | Idaho |
| 77 | Dennis D Flake | 3 | Grnd Son | — | Idaho |
| 78 | Edward L Horne | 37 | Son in law | Dragline Operator | Idaho |
| 79 | Lova F Horne | 28 | Daughter | — | Idaho |
Pedigree Summary
Roy
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)