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Maria Martinez — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Costilla-County, Colorado
Our Model Tree links this Maria Martinez across the 1930 and 1940 US Censuses in Costilla-County, Colorado (XGBoost, ~Confirmed) — first a daughter (b.~1922), then head of a 11-person household.
Age 18
b. ~1922
Female
Daughter
Born: Colorado
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Costilla-County, Colorado |
| Surname | Martinez |
| Given Name | Maria |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Colorado |
| 1935 Residence (City) | San Luis |
| 1935 Residence (County) | Costilla |
| Additional Details | |
| Highest Grade | No 5 |
| 1935 Residence | Colorado |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
| Township / Ward | San Francisco |
| Est. Birth Year | ~1922 |
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.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Maria | Age | Birth yr |
|---|---|---|---|---|
| Adolfo Martinez | Son | — | 24 | ~1916 |
| Erica Martinez | Spouse | — | 23 | ~1917 |
| Emma Martinez | Daughter | — | 14 | ~1926 |
| Augustina Martinez | Daughter | — | 20 | ~1920 |
| Felix Martinez | Head | — | 52 | ~1888 |
| Elvira Martinez | Spouse | — | 48 | ~1892 |
| Felipe Martinez | Son | — | 9 | ~1931 |
| Jose Taylor | Other | — | 74 | ~1866 |
| Maria Martinez | Daughter | — | 18 | ~1922 |
| Rufino Martinez | Son | — | 16 | ~1924 |
| Idarsi Martinez | Daughter | — | 12 | ~1928 |
Census Appearances
1930
Costilla, Colorado
Daughter, age 8
Costilla, Colorado · implied b. ~1922 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martinez |
| Given Name | Maria |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Colorado |
| Father's Birthplace | Colorado |
| Mother's Birthplace | New-Mexico |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1940
Costilla-County, Colorado
Daughter, age 18
Costilla-County, Colorado · implied b. ~1922 — 11 household members
| Surname | Martinez |
| Given Name | Maria |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Colorado |
| 1935 Residence (City) | San Luis |
| 1935 Residence (County) | Costilla |
| Highest Grade | No 5 |
| 1935 Residence | Colorado |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
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 Martinez across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Maria Martinez
Daughter · 1940 · age 18 · b. ~1922 · Colorado
★ You are viewing this record
Sibling
Adolfo Martinez
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rufino Martinez
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Felipe Martinez
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Idarsi Martinez
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Augustina Martinez
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Emma Martinez
Sibling · 1940 · age 14
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 — Costilla-County, Colorado
Open full size
1940 US Federal Census — Costilla-County, Colorado
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00459-00101)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Luz Perfelia Rael | 13 | Daughter | — | Colorado |
| 42 | Isaac Rael | 8 | Son | — | Colorado |
| 43 | Eva Rael | 5 | Daughter | — | Colorado |
| 44 | Deideria Rael | 3 | Son | — | Colorado |
| 45 | Amos Rael | 2 | Son | — | Colorado |
| 46 | Brigido Espinoza | 61 | Head | — | Colorado |
| 47 | Florita Espinoza | 57 | Wife | — | Colorado |
| 48 | Adelaida Espinoza | 31 | Daughter | — | Colorado |
| 49 | Pedro E. Espinoza | 23 | Son | Farm Laborer | Colorado |
| 50 | Margarito Espinoza | 20 | Son | Road Construction | Colorado |
| 51 | Delfinita Espinoza | 16 | Daughter | — | Colorado |
| 52 | Gilberto Medina | 57 | Head | Farmer | Colorado |
| 53 | Felipita Medina | 50 | Wife | — | Colorado |
| 54 | Emma Medina | 21 | Daughter | — | Colorado |
| 55 | Alfonso J. Medina | 18 | Son | Farm Laborer | Colorado |
| 56 | Marcos Medina | 16 | Son | Farm Laborer | Colorado |
| 57 | Agnaldo Medina | 13 | Son | — | Colorado |
| 58 | Lucille Medina | 12 | Daughter | — | Colorado |
| 59 | Edwardo Medina | 4 | Son | — | Colorado |
| 60 | Delfino Medina | 23 | Head | Farm Laborer | Colorado |
| 61 | Antonia Medina | 26 | Wife | — | Colorado |
| 62 | Rosa Medina | 2 | Daughter | — | Colorado |
| 63 | Mildred Medina | 0 | Daughter | — | Colorado |
| 64 | Felix Martinez | 52 | Head | Laborer | Colorado |
| 65 | Elvira T. Martinez | 48 | Wife | — | Colorado |
| 66 | Augustina Martinez | 20 | Daughter | — | Colorado |
| 67 | Maria Martinez THIS PERSON | 18 | Daughter | — | Colorado |
| 68 | Rufino Martinez | 16 | Son | Farm Laborer | Colorado |
| 69 | Emma Martinez | 14 | Daughter | — | Colorado |
| 70 | Idarsi Martinez | 12 | Daughter | — | Colorado |
| 71 | Felipe Jr. Martinez | 9 | Son | — | Colorado |
| 72 | Adolfo Martinez | 24 | Son | Farmer | Colorado |
| 73 | Erica Martinez | 23 | Wife | — | Colorado |
| 74 | Jose Maria Taylor | 74 | Father-in-law | — | Colorado |
| 75 | Solomon Martinez | 34 | Head | Caterpillar Driver | Colorado |
| 76 | Rosita Martinez | 21 | Wife | — | Colorado |
| 77 | Nora Martinez | 2 | Daughter | — | Colorado |
| 78 | Enos Martinez | 0 | Son | — | Colorado |
| 79 | Samuel Vialpando | 66 | Head | — | Colorado |
| 80 | Felicita Vialpando | 60 | Wife | — | New Mexico |
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)