RS
Robert Smith — 1940 US Census Record
Model Tree available1940 United States Federal Census · Los-Angeles-County, California
Our Model Tree links this Robert Smith across the 1920, 1930 and 1940 US Censuses in Los-Angeles-County, California (XGBoost, ~Confirmed), with identified parents Charles & Charlie — first a head (b.~1915), then head of a 3-person household.
Age 25
b. ~1915
Male
Head
Born: Kansas
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Los-Angeles-County, California |
| Surname | Smith |
| Given Name | Robert Lee |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Kansas |
| 1935 Residence (City) | California |
| Additional Details | |
| Occupation | Excavating & Trenching |
| Industry | Street Repairing |
| Class of Worker | PW |
| Hours Worked | 32 |
| Income (1939) | 600 |
| Highest Grade | H 1 |
| 1935 Residence | California |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
| Occupation | Excavating & Trenching |
| Township / Ward | Long Beach City |
| 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 Robert | Age | Birth yr |
|---|---|---|---|---|
| Robert Smith | Head | — | 25 | ~1915 |
| Robert Smith | Son | — | 2 | ~1938 |
| Hazel Smith | Spouse | — | 20 | ~1920 |
Census Appearances
1920
Los Angeles, …
Son, age 5
Los Angeles, California · implied b. ~1915 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | Robert L |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Kansas |
| Father's Birthplace | Kansas |
| Mother's Birthplace | Kansas |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
1930
Los Angeles, …
Son, age 15
Los Angeles, California · implied b. ~1915 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | Robert G |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Kansas |
| Father's Birthplace | Kansas |
| Mother's Birthplace | Kansas |
| Can Read/Write | Yes |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
1940
Los-Angeles-County, California
Head, age 25
Los-Angeles-County, California · implied b. ~1915 — 3 household members
| Surname | Smith |
| Given Name | Robert Lee |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Kansas |
| 1935 Residence (City) | California |
| Occupation | Excavating & Trenching |
| Industry | Street Repairing |
| Class of Worker | PW |
| Hours Worked | 32 |
| Income (1939) | 600 |
| Highest Grade | H 1 |
| 1935 Residence | California |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
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 Robert 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 father Charlie Smith (~0.92 confidence) and mother Margaret Smith (~0.92 confidence) and mother Margaret Smith (~0.60 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.84
Father
Charles Smith
b. ~1887
Source father
● Household
· direct · ~0.92
Father
Charlie Smith
b. ~1886
Source father
● Household
· direct · ~0.92
Mother
Margaret Smith
b. ~1896
Source mother
● Household
· direct · ~0.92
Mother
Margaret Smith
b. ~1906
Source mother
● Household
· direct · ~0.6
This person
Anchor record
Robert Smith
Head · 1940 · age 25 · b. ~1915 · California
★ 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 — Los-Angeles-County, California
Open full size
1940 US Federal Census — Los-Angeles-County, California
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00369-00396)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Alma Penfield | 43 | Wife | — | Nebraska |
| 2 | John Penfield | 16 | Son | — | Long Beach |
| 3 | Sally Penfield | 13 | Daughter | — | Long Beach |
| 4 | Mary M Tracy | 66 | Mother-in-law | — | Illinois |
| 5 | Frank I Irving | 45 | Head | Engineer | California |
| 6 | Eldra D Irving | 45 | Wife | — | New York |
| 7 | Nancy Irving | 19 | Daughter | — | California |
| 8 | Wallace Irving | 16 | Son | — | California |
| 9 | Kenneth Gow | 23 | Lodger | Assistant Engineer | Montana |
| 10 | William Aiken | 38 | Head | Body Supervisor | Illinois |
| 11 | Maud Aiken | 35 | Wife | — | Illinois |
| 12 | Elizabeth Aiken | 3 | Daughter | — | Illinois |
| 13 | Teddie F Eneminger | 35 | Head | — | Montana |
| 14 | Robert Eneminger | 14 | Son | — | Arizona |
| 15 | Teddy Eneminger | 3 | Son | — | California |
| 16 | Lloyd Linton | 40 | Head | Operator | Indiana |
| 17 | Lydia A Linton | 35 | Wife | — | Texas |
| 18 | John Linton | 14 | Son | — | Texas |
| 19 | Jimmie Lee Linton | 5 | Son | — | Oklahoma |
| 20 | Robert Lee Smith THIS PERSON | 25 | Head | Excavating & Trenching | Kansas |
| 21 | Hazel Jean Smith | 20 | Wife | — | Utah |
| 22 | Robert Gene Smith | 2 | Son | — | Long Beach |
| 23 | Richard Edward Drumright | 25 | Head | Water Tender | Oklahoma |
| 24 | Erma Veda Drumright | 21 | Wife | — | Missouri |
| 25 | Judith Ann Drumright | 1 | Daughter | — | California |
| 26 | — | None | — | — | — |
| 27 | Elmer Earley | 35 | Head | Salesman | Colorado |
| 28 | Louise A Earley | 35 | Wife | — | Washington |
| 29 | Mary Louise Earley | 11 | Daughter | — | California |
| 30 | John Earley | 7 | Son | — | California |
| 31 | Jimmie Earley | 4 | Son | — | California |
| 32 | Charles E Olson | 52 | Head | Painter | Nebraska |
| 33 | Dorothy E Olson | 51 | Wife | — | Kansas |
| 34 | James Carton | 39 | Head | Chief Water Tender | Arkansas |
| 35 | Alice Carton | 40 | Wife | — | Minnesota |
| 36 | Kenneth Norton | 25 | Stepson | News Worker | Idaho |
| 37 | Ella Ellis | 75 | Head | — | West Virginia |
| 38 | Rosa Stogdill | 51 | Head | Hand Laundry | Nebraska |
| 39 | Robert Stogdill | 20 | Son | News Worker | California |
| 40 | Miles Lewis | 39 | Head | Driller Oil | Kansas |
Pedigree Summary
Robert
Gen 1 · 4 parents
~0.84
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)