JP
John Pierce — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Los-Angeles-County, California
Our Model Tree links this John Pierce across the 1930 and 1940 US Censuses in Los-Angeles-County, California (XGBoost, ~Confirmed) — first a son (b.~1928), then head of a 7-person household.
Age 12
b. ~1928
Male
Son
Born: California
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Los-Angeles-County, California |
| Surname | Pierce |
| Given Name | John |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | Los Angeles City |
| 1935 Residence (County) | Los Angeles City |
| Additional Details | |
| Industry | 0 |
| Highest Grade | 5 |
| 1935 Residence | Same place |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Township / Ward | Los Angeles City |
| Est. Birth Year | ~1928 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Patricia Pierce | Daughter | — | 8 | ~1932 |
| Georgina Pierce | Daughter | — | 6 | ~1934 |
| Mary Pierce | Daughter | — | 2 | ~1938 |
| Jack Pierce | Head | — | 57 | ~1883 |
| Raymond Pierce | Son | — | 4 | ~1936 |
| John Pierce | Son | — | 12 | ~1928 |
| Josephine Pierce | Spouse | — | 40 | ~1900 |
Census Appearances
1930
Los Angeles, …
Son, age 1
Los Angeles, California · implied b. ~1929 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Pearce |
| Given Name | John J. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | England |
| Mother's Birthplace | Massachusetts |
| Occupation | none |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
Los-Angeles-County, California
Son, age 12
Los-Angeles-County, California · implied b. ~1928 — 7 household members
| Surname | Pierce |
| Given Name | John |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | Los Angeles City |
| 1935 Residence (County) | Los Angeles City |
| Industry | 0 |
| Highest Grade | 5 |
| 1935 Residence | Same place |
| 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 John Pierce across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Pierce
Son · 1940 · age 12 · b. ~1928 · California
★ You are viewing this record
Sibling
Raymond Pierce
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Patricia Pierce
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Georgina Pierce
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Pierce
Sibling · 1940 · age 2
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
40 people indexed on this census page (nara:1940:m-t0627-00411-00414)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Richard Fuchs | 5 | son | — | California |
| 2 | Patricia A Fuchs | 2 | daughter | — | California |
| 3 | James Reynolds | 44 | Head | Structure Iron | Scotland |
| 4 | Lula Reynolds | 49 | Wife | Asst Mgr (R) | Indiana |
| 5 | Cedric Kelly | 39 | Head | Carpenter | Texas |
| 6 | Madge C. Kelly | 34 | Wife | — | Texas |
| 7 | Cedric Jr Kelly | 13 | Son | — | Texas |
| 8 | Norman L. Kelly | 12 | Son | — | Texas |
| 9 | Jeane Kelly | 4 | Son | — | Arizona |
| 10 | Jack V. Pierce | 57 | Head | Traffic Officer | Massachusetts |
| 11 | Josephine Pierce | 40 | Wife | — | England |
| 12 | John Pierce THIS PERSON | 12 | son | — | California |
| 13 | Patricia Pierce | 8 | daughter | — | California |
| 14 | Georgina Pierce | 6 | daughter | — | California |
| 15 | Raymond Pierce | 4 | son | — | California |
| 16 | Mary Agatha Pierce | 2 | daughter | — | California |
| 17 | Emily K. Gott | 62 | Head | — | France |
| 18 | Ruth F. Gott | 31 | daughter | Grade Teacher | California |
| 19 | Grace Margadonna | 64 | Head | Musician | Italy |
| 20 | Adelina Margadonna | 61 | Wife | — | Italy |
| 21 | Italo G. Margadonna | 21 | Son | Salesman | California |
| 22 | Nanna M. Roseboom | 63 | Head | Nurse | Indiana |
| 23 | Lenore W. Sieber | 69 | Lodger | — | Missouri |
| 24 | Kurt Glass | 63 | Head | R. Confection | Indiana |
| 25 | Luella Glass | 61 | Wife | — | Indiana |
| 26 | Rex B. Jacobs | 42 | Head | Used Auto Furniture | Kansas |
| 27 | Annette Jacobs | 47 | wife | Stock Clerk | Minnesota |
| 28 | Norina Jacobs | 22 | daughter | Beauty Operator | Minnesota |
| 29 | John D Mattson | 34 | Head | Physical Ed. | Canada-English |
| 30 | Dianne Mattson | 25 | Wife | — | Minnesota |
| 31 | Carolyn Mattson | 5 | daughter | — | California |
| 32 | Raoulene Mattson | 1 | daughter | — | California |
| 33 | Clyde C. Clary | 28 | Head | Foreman | Kentucky |
| 34 | Elvina A. Clary | 27 | Wife | — | Wisconsin |
| 35 | Mary Clary | 68 | Mother | — | Alabama |
| 36 | Julius W Shapiro | 52 | Head | Taylor | Poland |
| 37 | Jennie Shapiro | 50 | Wife | Taylor | Poland |
| 38 | William P Mclaughlin | 27 | son-in-law | Mechanic | Illinois |
| 39 | Goldie Mclaughlin | 24 | daughter | R. Clerk | Indiana |
| 40 | Ethel Mcgowan | 27 | daughter | — | Indiana |
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)