MM
Mary Martinez — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Conejos-County, Colorado
Our Model Tree links this Mary Martinez across the 1930 and 1940 US Censuses in Conejos-County, Colorado (XGBoost, ~Confirmed) — first a daughter (b.~1929), then head of a 9-person household.
Age 11
b. ~1929
Female
Daughter
Born: Colorado
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Conejos-County, Colorado |
| Surname | Martinez |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Colorado |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Conejos |
| Additional Details | |
| Highest Grade | Hs 4 |
| 1935 Residence | Colorado |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
| Township / Ward | Precinct 11 La Sauces |
| Est. Birth Year | ~1929 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Emelia Martinez | Daughter | — | 13 | ~1927 |
| Alfredo Martinez | Son | — | 9 | ~1931 |
| Agustin Martinez | Son | — | 17 | ~1923 |
| Mary Martinez | Daughter | — | 11 | ~1929 |
| Delubina Martinez | Daughter | — | 19 | ~1921 |
| Elizardo Martinez | Son | — | 15 | ~1925 |
| Matilda Martinez | Spouse | — | 51 | ~1889 |
| Salvador Martinez | Son | — | 7 | ~1933 |
| Alfredo Martinez | Head | — | 49 | ~1891 |
Census Appearances
1930
Conejos, Colorado
Daughter, age 1
Conejos, Colorado · implied b. ~1929 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martinez |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Colorado |
| Father's Birthplace | Colorado |
| Mother's Birthplace | Colorado |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1940
Conejos-County, Colorado
Daughter, age 11
Conejos-County, Colorado · implied b. ~1929 — 9 household members
| Surname | Martinez |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Colorado |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Conejos |
| Highest Grade | Hs 4 |
| 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
Daughter · 1940 · age 11 · b. ~1929 · Colorado
★ You are viewing this record
Sibling
Alfredo Martinez
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elizardo Martinez
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Delubina Martinez
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Agustin Martinez
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Salvador Martinez
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Emelia Martinez
Sibling · 1940 · age 13
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 — Conejos-County, Colorado
Open full size
1940 US Federal Census — Conejos-County, Colorado
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00458-00708)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Esperanza Rangel | 12 | Daughter | — | Colorado |
| 42 | Honesto Rangel | 9 | Son | — | Colorado |
| 43 | Florida Rangel | 7 | Daughter | — | Colorado |
| 44 | Lupio Rangel | 3 | Son | — | Colorado |
| 45 | Henry Lucero | 62 | Head | Laborer | New Mexico |
| 46 | Tonita Lucero | 42 | Wife | — | Colorado |
| 47 | Adonelia Lucero | 16 | Daughter | — | Colorado |
| 48 | Aurora Lucero | 11 | Daughter | — | Colorado |
| 49 | Arturo Lucero | 10 | Son | — | Colorado |
| 50 | Lucia Lucero | 8 | Daughter | — | Colorado |
| 51 | Ernesto Lucero | 5 | Son | — | Colorado |
| 52 | Reyes Lucero | 2 | Daughter | — | Colorado |
| 53 | Alfredo Martinez | 49 | Head | Farmer | Colorado |
| 54 | Matilda Martinez | 51 | Wife | — | Colorado |
| 55 | Delubina Martinez | 19 | Daughter | — | Colorado |
| 56 | Agustin Martinez | 17 | Son | Laborer | Colorado |
| 57 | Elizardo Martinez | 15 | Son | Laborer | Colorado |
| 58 | Emelia Martinez | 13 | Daughter | — | Colorado |
| 59 | Mary Martinez THIS PERSON | 11 | Daughter | — | Colorado |
| 60 | Alfredo Jr. Martinez | 9 | Son | — | Colorado |
| 61 | Salvador Martinez | 7 | Son | — | Colorado |
| 62 | Flaviano Gallegos | 47 | Head | Farmer | Colorado |
| 63 | Minnie Gallegos | 40 | Wife | — | Colorado |
| 64 | Luter Gallegos | 19 | Son | Laborer | Colorado |
| 65 | Isaac Gallegos | 18 | Son | Laborer | Colorado |
| 66 | Alonzo Gallegos | 16 | Son | Farmer | Colorado |
| 67 | Gilberto Gallegos | 9 | Son | — | Colorado |
| 68 | Joe Gallegos | 8 | Son | — | Colorado |
| 69 | Orlando Gallegos | 5 | Son | — | Colorado |
| 70 | Glenda Gallegos | 3 | Daughter | — | Colorado |
| 71 | Manuel Gallegos | 19 | Son | Laborer | Colorado |
| 72 | Carmelita Gallegos | 19 | Daughter-in-law | — | Colorado |
| 73 | Jose P. Gallegos | 0 | Grandson | — | New Mexico |
| 74 | Juan B. Naranjo | 84 | Head | — | New Mexico |
| 75 | Albino Naranjo | 37 | Son | — | Colorado |
| 76 | Francisca Martinez | 71 | Head | — | Colorado |
| 77 | Casimira Martinez | 32 | Daughter | — | Colorado |
| 78 | Salomon Barela | 20 | Grandson | Laborer | Colorado |
| 79 | Gaspar Martinez | 30 | Head | Farmer | Colorado |
| 80 | Cresenda Martinez | 37 | Wife | — | Colorado |
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)