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Maria Lopez — 1940 US Census Record
Model Tree available1940 United States Federal Census · Maricopa-County, Arizona
Our Model Tree links this Maria Lopez across the 1920, 1930 and 1940 US Censuses in Maricopa-County, Arizona (XGBoost, ~Confirmed), with identified parents Louis & Ramon — first a spouse (b.~1911), then head of a 5-person household.
Age 29
b. ~1911
Female
Spouse
Born: Arizona
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Maricopa-County, Arizona |
| Surname | Lopez |
| Given Name | Maria |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 29 |
| Marital Status | Married |
| Birthplace | Arizona |
| 1935 Residence (City) | Glendale Town |
| 1935 Residence (County) | Maricopa |
| Additional Details | |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth State | Arizona |
| Birth Country | United States |
| Birthplace (normalized) | arizona |
| Township / Ward | Glendale Town |
| Est. Birth Year | ~1911 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Maria | Age | Birth yr |
|---|---|---|---|---|
| Carlos Lopez | Head | — | 23 | ~1917 |
| Maria Lopez | Spouse | — | 29 | ~1911 |
| Lupe Sanchez | Other | — | 9 | ~1931 |
| Carlos Lopez | Son | — | 1 | ~1939 |
| Manuel Sanchez | Other | — | 10 | ~1930 |
Census Appearances
1920
Maricopa, Arizona
Daughter, age 8
Maricopa, Arizona · implied b. ~1912 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lopez |
| Given Name | Maggie |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Arizona |
| Father's Birthplace | Mexico |
| Mother's Birthplace | Mexico |
| Occupation | none |
| Birth State | Arizona |
| Birth Country | United States |
| Birthplace (normalized) | arizona |
1930
Maricopa, Arizona
Daughter, age 18
Maricopa, Arizona · implied b. ~1912 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lopez |
| Given Name | Maria L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Mexican |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Arizona |
| Father's Birthplace | Mexico |
| Mother's Birthplace | Mexico |
| Occupation | Laborer |
| Industry | Cotton Clean up |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Arizona |
| Birth Country | United States |
| Birthplace (normalized) | arizona |
1940
Maricopa-County, Arizona
Spouse, age 29
Maricopa-County, Arizona · implied b. ~1911 — 5 household members
| Surname | Lopez |
| Given Name | Maria |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 29 |
| Marital Status | Married |
| Birthplace | Arizona |
| 1935 Residence (City) | Glendale Town |
| 1935 Residence (County) | Maricopa |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth State | Arizona |
| Birth Country | United States |
| Birthplace (normalized) | arizona |
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 Maria Lopez across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Louis Lopez (~0.92 confidence) and father Ramon Lopez (~0.92 confidence) and mother Maria Lopez (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Louis Lopez
b. ~1888
Source father
● Household
· direct · ~0.92
Father
Ramon Lopez
b. ~1874
Source father
● Household
· direct · ~0.92
Mother
Maria Lopez
b. ~1890
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Maria Lopez
Spouse · 1940 · age 29 · b. ~1911 · Arizona
★ 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 — Maricopa-County, Arizona
Open full size
1940 US Federal Census — Maricopa-County, Arizona
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00107-00278)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Refugio Hernandez | 9 | Son | — | Arizona |
| 2 | Isidoro Hernandez | 8 | Daughter | — | Arizona |
| 3 | Joaquin Hernandez | 50 | Head | Laborer | Mexico |
| 4 | Josefa Hernandez | 51 | Wife | — | Mexico |
| 5 | Joe Hernandez | 21 | Son | Laborer | Arizona |
| 6 | Mary Lucia Hernandez | 20 | Daughter | — | Arizona |
| 7 | Willie Hernandez | 18 | Son | Laborer | Arizona |
| 8 | Carlos Lopez | 23 | Head | Laborer | Mexico |
| 9 | Maria Lopez THIS PERSON | 29 | Wife | — | Arizona |
| 10 | Manuel Sanchez | 10 | Lodger | — | Arizona |
| 11 | Lupe Sanchez | 9 | Lodger | — | Arizona |
| 12 | Carlos Jr. Lopez | 1 | Son | — | Arizona |
| 13 | Ignacio Ramirez | 42 | Head | Laborer | Mexico |
| 14 | Francisca Ramirez | 35 | Wife | — | Mexico |
| 15 | Gilbert Ramirez | 13 | Son | — | Arizona |
| 16 | Charles Ramirez | 8 | Son | — | Arizona |
| 17 | Celia Ramirez | 7 | Daughter | — | Arizona |
| 18 | Ignacio Ramirez | 5 | Son | — | Arizona |
| 19 | Robert Ramirez | 2 | Son | — | Arizona |
| 20 | Lester Thompson | 23 | Head | Attendant | Texas |
| 21 | Lillian Thompson | 22 | Wife | — | Texas |
| 22 | Rochelle Thompson | 12 | Daughter | — | Texas |
| 23 | Leonard Gallardo | 34 | Head | Laborer | Mexico |
| 24 | Claudina Gallardo | 19 | Wife | — | Arizona |
| 25 | Aurora Gallardo | 1 | Daughter | — | Arizona |
| 26 | M. Leon | 63 | Head | Laborer | Arizona |
| 27 | Maria Leon | 53 | Wife | — | Arizona |
| 28 | M. Jr. Leon | 35 | Son | Laborer | Arizona |
| 29 | Mike Leon | 24 | Son | Laborer | Arizona |
| 30 | Ofelia Leon | 23 | Daughter | — | Arizona |
| 31 | Celia Leon | 26 | Daughter | — | Arizona |
| 32 | Apolinario Guevara | 52 | Head | Laborer | Mexico |
| 33 | Mariana Guevara | 50 | Wife | — | Mexico |
| 34 | Miguel Monge | 35 | Head | Laborer | Mexico |
| 35 | Francisca Monge | 31 | Wife | — | Arizona |
| 36 | Manuela Monge | 14 | Daughter | — | Arizona |
| 37 | Rosita Monge | 9 | Daughter | — | Arizona |
| 38 | Esther Monge | 6 | Daughter | — | Arizona |
| 39 | Anita Monge | 4 | Daughter | — | Arizona |
| 40 | Miguel Jr. Monge | 0 | Son | — | Arizona |
Pedigree Summary
Maria
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)