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Mary Lopez — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Los-Angeles-County, California
Our Model Tree links this Mary Lopez across the 1930 and 1940 US Censuses in Los-Angeles-County, California (XGBoost, ~Confirmed) — first a daughter (b.~1925), then head of a 7-person household.
Age 15
b. ~1925
Female
Daughter
Born: California
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Los-Angeles-County, California |
| Surname | Lopez |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | Azusa City |
| 1935 Residence (County) | Los Angeles |
| Additional Details | |
| Highest Grade | S 7 |
| 1935 Residence | Same house |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Township / Ward | Azusa 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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Lopez | Daughter | — | 15 | ~1925 |
| Sallie Lopez | Daughter | — | 12 | ~1928 |
| Angel Lopez | Head | — | 35 | ~1905 |
| Amalia Lopez | Daughter | — | 10 | ~1930 |
| Robert Lopez | Son | — | 8 | ~1932 |
| Aurora Lopez | Spouse | — | 30 | ~1910 |
| Gloria Lopez | Daughter | — | 11 | ~1929 |
Census Appearances
1930
Los Angeles, …
Daughter, age 4
Los Angeles, California · implied b. ~1926 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lopez |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Mexican |
| Age | 4 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Mexico |
| Mother's Birthplace | Mexico |
| Can Read/Write | No |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
Los-Angeles-County, California
Daughter, age 15
Los-Angeles-County, California · implied b. ~1925 — 7 household members
| Surname | Lopez |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | Azusa City |
| 1935 Residence (County) | Los Angeles |
| Highest Grade | S 7 |
| 1935 Residence | Same house |
| 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 Mary Lopez across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Lopez
Daughter · 1940 · age 15 · b. ~1925 · California
★ You are viewing this record
Sibling
Amalia Lopez
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Lopez
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gloria Lopez
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Sallie Lopez
Sibling · 1940 · age 12
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-t0627-00237-00420)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Esperanza Lopez | 12 | Daughter | — | California |
| 2 | Carlotta Lopez | 11 | Daughter | — | California |
| 3 | Antonia Lopez | 9 | Daughter | — | California |
| 4 | Mary Lopez | 3 | Daughter | — | California |
| 5 | Jesus Ramos | 53 | Head | Orange Picker | Mexico |
| 6 | Vruna Ramos | 56 | Wife | — | Mexico |
| 7 | Angel Lopez | 35 | Head | Orange Picker | Mexico |
| 8 | Aurora Lopez | 30 | Wife | — | California |
| 9 | Mary Lopez THIS PERSON | 15 | Daughter | — | California |
| 10 | Sallie Lopez | 12 | Daughter | — | California |
| 11 | Gloria Lopez | 11 | Daughter | — | California |
| 12 | Amalia Lopez | 10 | Daughter | — | California |
| 13 | Robert Lopez | 8 | Son | — | California |
| 14 | Victor Ynique | 59 | Head | Dairyman | Mexico |
| 15 | Paula G. Ynique | 47 | Wife | — | Mexico |
| 16 | Alberto Pacheco | 17 | Step-son | — | Mexico |
| 17 | Hortense Pacheco | 15 | Step-daughter | — | California |
| 18 | Victor Ramos | 28 | Head | Orange Picker | Mexico |
| 19 | Pellen Ramos | 33 | Wife | — | New Mexico |
| 20 | Robert Ramos | 4 | Son | — | California |
| 21 | Richard Ramos | 2 | Son | — | California |
| 22 | Abundio Ramos | 61 | Head | Orange Picker | Mexico |
| 23 | Damiana Ramos | 60 | Wife | — | Mexico |
| 24 | Alexarez Ramos | 17 | Daughter | — | California |
| 25 | Antonio Visineio | 48 | Brother-in-law | Orange Picker | Mexico |
| 26 | Ygnacio Ramos | 40 | Head | Ranch Hand | Mexico |
| 27 | Maria Ramos | 35 | Wife | — | Mexico |
| 28 | Consuelo Ramos | 17 | Daughter | — | California |
| 29 | Anita Ramos | 15 | Daughter | — | California |
| 30 | Esperanza Ramos | 14 | Daughter | — | California |
| 31 | Josephine Ramos | 10 | Daughter | — | California |
| 32 | Ruth Ramos | 1 | Daughter | — | California |
| 33 | Philip Garcia | 65 | Head | — | Mexico |
| 34 | Altagracia Garcia | 62 | Wife | — | Mexico |
| 35 | Paul Garcia | 30 | Son | Orange Picker | California |
| 36 | Joe Garcia | 25 | Son | Orange Picker | California |
| 37 | Frank Garcia | 20 | Son | Orange Picker | California |
| 38 | Abundino Ramos | 33 | Head | Orange Picker | Mexico |
| 39 | Lenise Ramos | 23 | Wife | — | California |
| 40 | Joe Jr. Ramos | 7 | Son | — | California |
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)