RM
Richard Mason — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Los-Angeles-County, California
Our Model Tree links this Richard Mason across the 1930 and 1940 US Censuses in Los-Angeles-County, California (XGBoost, ~Confirmed) — first a son (b.~1925), then head of a 6-person household.
Age 15
b. ~1925
Male
Son
Born: California
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Los-Angeles-County, California |
| Surname | Mason |
| Given Name | Richard |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | Pasadena |
| 1935 Residence (County) | Los Angeles |
| Additional Details | |
| Highest Grade | No 8 |
| 1935 Residence | California |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Township / Ward | Sierra Madre City |
| Est. Birth Year | ~1925 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Richard | Age | Birth yr |
|---|---|---|---|---|
| Lillian Mason | Daughter | — | 11 | ~1929 |
| Thomas Mason | Head | — | 38 | ~1902 |
| Susie Mason | Daughter | — | 14 | ~1926 |
| Richard Mason | Son | — | 15 | ~1925 |
| Madeline Mason | Daughter | — | 13 | ~1927 |
| Louise Mason | Spouse | — | 32 | ~1908 |
Census Appearances
1930
Los Angeles, …
Son, age 4
Los Angeles, California · implied b. ~1926 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mason |
| Given Name | Richard J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Canada |
| Mother's Birthplace | New York |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
Los-Angeles-County, California
Son, age 15
Los-Angeles-County, California · implied b. ~1925 — 6 household members
| Surname | Mason |
| Given Name | Richard |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | Pasadena |
| 1935 Residence (County) | Los Angeles |
| Highest Grade | No 8 |
| 1935 Residence | California |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
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 Richard Mason across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Richard Mason
Son · 1940 · age 15 · b. ~1925 · California
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Sibling
Susie Mason
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Madeline Mason
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lillian Mason
Sibling · 1940 · age 11
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 — Los-Angeles-County, California
Open full size
1940 US Federal Census — Los-Angeles-County, California
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-00237-00960)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 2 | Paul Granados | 44 | Head | Gardening | Mexico |
| 3 | Francisca Granados | 60 | Wife | — | Mexico |
| 4 | Minerva B. Thompson | 59 | Head | — | Missouri |
| 5 | Percy F. Bennett | 41 | Head | Cement Finisher | South Dakota |
| 6 | Beulah Bennett | 30 | Wife | Waitress | California |
| 7 | Donna M. Bennett | 10 | Daughter | — | California |
| 8 | Darlene C. Bennett | 7 | Daughter | — | California |
| 9 | John D. Bailey | 54 | Head | Laborer | Kansas |
| 10 | Rachel M. Bailey | 47 | Wife | — | Missouri |
| 11 | Eber F. Bailey | 26 | Son | Plumber | Kansas |
| 12 | Delbe Brown | 3 | Grandson | — | California |
| 13 | Richard Kroell | 38 | Head | Printer | Illinois |
| 14 | Margaret D. Kroell | 31 | Wife | — | Kansas |
| 15 | Donald Case | 11 | Son | — | Kansas |
| 16 | Anna Case | 5 | Daughter | — | California |
| 17 | Margaret Kroell | 0 | Daughter | — | California |
| 18 | John D. Graham | 42 | Head | Marker | Texas |
| 19 | Laura Graham | 38 | Wife | — | Louisiana |
| 20 | Doris Graham | 14 | Daughter | — | Texas |
| 21 | John D. Jr. Graham | 16 | Son | — | Texas |
| 22 | Edgar G. Larabee | 89 | Head | — | Ohio |
| 23 | Edward Q. Garcia | 29 | Head | Laborer | California |
| 24 | Anita Garcia | 27 | Wife | — | New Mexico |
| 25 | Josephine Garcia | 3 | Daughter | — | California |
| 26 | Peter Garcia | 2 | Son | — | California |
| 27 | Thomas Mason | 38 | Head | Laborer | California |
| 28 | Louise Mason | 32 | Wife | — | California |
| 29 | Richard Mason THIS PERSON | 15 | Son | — | California |
| 30 | Susie Mason | 14 | Daughter | — | California |
| 31 | Madeline Mason | 13 | Daughter | — | California |
| 32 | Lillian Mason | 11 | Daughter | — | California |
| 33 | Arthur Haines | 34 | Head | Laborer | Arizona |
| 34 | Juanita Haines | 37 | Wife | Housekeeping | New Mexico |
| 35 | Carlos Candelaria | 13 | Step-son | — | California |
| 36 | Lozano Candelaria | 11 | Step-son | — | California |
| 37 | Ignacio Candelaria | 9 | Step-son | — | California |
| 38 | Moses Rudolph | 81 | Head | — | Russia |
| 39 | Eva La Torre | 40 | Head | Clay Working Artist | Kansas |
| 40 | Norman La Torre | 12 | Son | — | California |
Related Census Records
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)