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Mary Martinez — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Las-Animas-County, Colorado
Our Model Tree links this Mary Martinez across the 1930 and 1940 US Censuses in Las-Animas-County, Colorado (XGBoost, ~Confirmed) — first a spouse (b.~1908), then head of a 6-person household.
Age 32
b. ~1908
Female
Spouse
Born: Colorado
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Las-Animas-County, Colorado |
| Surname | Martinez |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Colorado |
| 1935 Residence (City) | Precinct 35 |
| 1935 Residence (County) | Las Animas |
| Additional Details | |
| Hours Worked | 0 |
| Highest Grade | No 5 |
| 1935 Residence | Colorado |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
| Township / Ward | Precinct 35 |
| Est. Birth Year | ~1908 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Jose Martinez | Head | — | 37 | ~1903 |
| Helen Martinez | Daughter | — | 5 | ~1935 |
| Joe Vigil | Other | — | 13 | ~1927 |
| Mary Martinez | Spouse | — | 32 | ~1908 |
| Bernice Martinez | Daughter | — | 12 | ~1928 |
| Johnny Martinez | Son | — | 13 | ~1927 |
Census Appearances
1930
Las Animas, …
Other, age 22
Las Animas, Colorado · implied b. ~1908 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martinez |
| Given Name | Mary |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Married |
| Birthplace | Colorado |
| Age at First Marriage | 22 |
| Father's Birthplace | Colorado |
| Mother's Birthplace | Colorado |
| Can Read/Write | Yes |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1940
Las-Animas-County, Colorado
Spouse, age 32
Las-Animas-County, Colorado · implied b. ~1908 — 6 household members
| Surname | Martinez |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Colorado |
| 1935 Residence (City) | Precinct 35 |
| 1935 Residence (County) | Las Animas |
| Hours Worked | 0 |
| 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 Mary Martinez across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Martinez
Spouse · 1940 · age 32 · b. ~1908 · Colorado
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Las-Animas-County, Colorado
Open full size
1940 US Federal Census — Las-Animas-County, Colorado
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00468-00449)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Enriquez Herrera | 2 | Son | — | Colorado |
| 42 | Infant (V) Herrera | 0 | Daughter | — | Colorado |
| 43 | Jake Valenzuela | 20 | Stepson | Farm Laborer | Colorado |
| 44 | Margaret Valenzuela | 17 | Stepdaughter | — | Colorado |
| 45 | Beatrice Valenzuela | 16 | Stepdaughter | — | Colorado |
| 46 | Leonard Valenzuela | 15 | Stepson | — | Colorado |
| 47 | Juan Sanchez | 90 | Father-in-law | — | New Mexico |
| 48 | Orville Calkins | 46 | Head | Farmer | Iowa |
| 49 | Pearl Calkins | 44 | Wife | — | New Mexico |
| 50 | Dale Calkins | 14 | Son | Farm Laborer | New Mexico |
| 51 | Ernest Calkins | 11 | Son | — | Colorado |
| 52 | Ralph Calkins | 10 | Son | — | Colorado |
| 53 | Dorothy Calkins | 8 | Daughter | — | New Mexico |
| 54 | Margy Calkins | 6 | Daughter | — | Colorado |
| 55 | Francisco Trujillo | 79 | Head | — | New Mexico |
| 56 | Annie Watson | 18 | Grand-daughter | — | Colorado |
| 57 | Henry Trujillo | 31 | Head | Farmer | Colorado |
| 58 | Della Trujillo | 20 | Wife | — | Colorado |
| 59 | Mary Trujillo | 5 | Daughter | — | Colorado |
| 60 | Annabelle Trujillo | 4 | Daughter | — | Colorado |
| 61 | Frank Trujillo | 3 | Son | — | Colorado |
| 62 | Daniel Trujillo | 2 | Son | — | Colorado |
| 63 | Henry Trujillo | 0 | Son | — | Colorado |
| 64 | Raymond Martinez | 25 | Head | Farmer | Colorado |
| 65 | Fernando Martinez | 80 | Father | — | New Mexico |
| 66 | Della Duran | 32 | Sister | — | New Mexico |
| 67 | May Duran | 13 | Nephew | — | Colorado |
| 68 | Sadie Duran | 12 | Niece | — | Colorado |
| 69 | Doroteo Duran | 11 | Nephew | — | Colorado |
| 70 | Valentina Duran | 10 | Niece | — | Colorado |
| 71 | Jose Martinez | 37 | Head | Farmer | Colorado |
| 72 | Mary Martinez THIS PERSON | 32 | Wife | — | Colorado |
| 73 | Johnny Martinez | 13 | Son | — | Colorado |
| 74 | Bernice Martinez | 12 | Daughter | — | Colorado |
| 75 | Helen Martinez | 5 | Daughter | — | Colorado |
| 76 | Joe Vigil | 13 | Stepson | — | Colorado |
| 77 | Pete Fiorenzi | 52 | Head | Farmer | Italy |
| 78 | Teresa Fiorenzi | 48 | Wife | — | Italy |
| 79 | Peter Fiorenzi | 14 | Son | — | Michigan |
| 80 | Leopoldo Maffoni | 36 | Cousin | Farm Laborer | Italy |
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)