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Mary Martinez — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Polk, Iowa
Our Model Tree links this Mary Martinez across the 1930 and 1940 US Censuses in Polk, Iowa (XGBoost, ~Confirmed) — first a daughter (b.~1923), then head of a 9-person household.
Age 7
b. ~1923
Female
Daughter
Born: Iowa
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Polk, Iowa |
| Surname | Martinez |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Mexican |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Mexico |
| Mother's Birthplace | Mexico |
| Additional Details | |
| Occupation | none |
| Can Read/Write | Yes |
| Mother Tongue | Spanish |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Des Moines City |
| Est. Birth Year | ~1923 |
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 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Tomas Martinez | Spouse | — | 38 | ~1892 |
| Afutha Martinez | Daughter | — | 5 | ~1925 |
| Mary Martinez | Daughter | — | 7 | ~1923 |
| Patricia Martinez | Son | — | 10 | ~1920 |
| Casimiro Martinez | Head | — | 44 | ~1886 |
| Orelia Martinez | Daughter | — | 2 | ~1928 |
| Assusion Martinez | Son | — | 9 | ~1921 |
| Joaquin Martinez | Daughter | — | 12 | ~1918 |
| Lando Martinez | Son | — | 4 | ~1926 |
Census Appearances
1930
Polk, Iowa
Daughter, age 7
Polk, Iowa · implied b. ~1923 — 9 household members
| Surname | Martinez |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Mexican |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Mexico |
| Mother's Birthplace | Mexico |
| Occupation | none |
| Can Read/Write | Yes |
| Mother Tongue | Spanish |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Polk-County, Iowa
Daughter, age 18
Polk-County, Iowa · implied b. ~1922 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Industry | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
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 · 1930 · age 7 · b. ~1923 · Iowa
★ You are viewing this record
Sibling
Lando Martinez
Sibling · 1930 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Orelia Martinez
Sibling · 1930 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joaquin Martinez
Sibling · 1930 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Afutha Martinez
Sibling · 1930 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Assusion Martinez
Sibling · 1930 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Patricia Martinez
Sibling · 1930 · age 10
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
1930 US Federal Census — Polk, Iowa
Open full size
1930 US Federal Census — Polk, Iowa
Page Contents
50 people indexed on this census page (ia:1930:iowacensus00reel677:0460)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Andrew Bright | 75 | Head | None | Tennessee |
| 52 | Anna Bright | 75 | Wife | None | Missouri |
| 53 | Casimiro Martinez | 44 | Head | Laborer | Mexico |
| 54 | Tomas Martinez | 38 | Wife | None | Mexico |
| 55 | Joaquin Martinez | 12 | Daughter | None | Iowa |
| 56 | Patricia Martinez | 10 | Son | None | Iowa |
| 57 | Assusion Martinez | 9 | Son | None | Iowa |
| 58 | Mary Martinez THIS PERSON | 7 | Daughter | None | Iowa |
| 59 | Afutha Martinez | 5 | Daughter | None | Iowa |
| 60 | Lando Martinez | 4 | Son | None | Iowa |
| 61 | Orelia Martinez | 2 | Daughter | None | Iowa |
| 62 | — | None | — | — | — |
| 63 | Geo W. Mccoy | 70 | Head | Laborer | Iowa |
| 64 | Lezma Mccoy | 56 | Wife | None | Nebraska |
| 65 | Thomas F. Mccoy | 63 | Brother | Janitor | Iowa |
| 66 | Lloyd Terrill | 53 | Head | Stower | Iowa |
| 67 | Elizabeth Terrill | 62 | Wife | None | Iowa |
| 68 | Henry Kurtz | 44 | Head | Fireman | Iowa |
| 69 | Fannie Kurtz | 44 | Wife | None | Illinois |
| 70 | Guy E. Johnson | 58 | Head | Fireman | Iowa |
| 71 | Kate Johnson | 55 | Wife | None | Iowa |
| 72 | Joseph Johnson | 29 | Son | Truck Driver | Iowa |
| 73 | John Krentz | 53 | Head | Flagman | Sweden |
| 74 | Harry Krentz | 28 | Son | Laborer | Iowa |
| 75 | John Krentz | 15 | Son | None | Iowa |
| 76 | Bert Preston | 28 | Boarder | Laborer | Missouri |
| 77 | Mabel Preston | 27 | Boarder | None | Iowa |
| 78 | Gladis Preston | 9 | Boarder | None | Iowa |
| 79 | Rolla Preston | 4 | Boarder | None | Iowa |
| 80 | Hellen Preston | 3 | Boarder | None | Iowa |
| 81 | Bernice Brown | 1 | Boarder | None | Iowa |
| 82 | Jess Vinson | 57 | Head | Laborer | Iowa |
| 83 | Rebecca Kock | 55 | Servant | Servant | Texas |
| 84 | Alvan Purdy | 26 | Head | Beveler | Iowa |
| 85 | Amelia Purdy | 27 | Wife | None | Iowa |
| 86 | Velma Purdy | 3 | Daughter | None | Iowa |
| 87 | Adolf John | 23 | Boarder | Fireman | Iowa |
| 88 | Walter Sanders | 36 | Head | Painter | Iowa |
| 89 | Maggie Sanders | 31 | Wife | None | Iowa |
| 90 | Print Sanders | 15 | Son | None | Iowa |
| 91 | Roy Sanders | 13 | Son | None | Iowa |
| 92 | Albert Sanders | 8 | Son | None | Iowa |
| 93 | Emma Sanders | 7 | Daughter | None | Iowa |
| 94 | Beulah Sanders | 5 | Daughter | None | Iowa |
| 95 | Edna Sanders | 3 | Daughter | None | Iowa |
| 96 | Francis Sanders | 1 | Daughter | None | Iowa |
| 97 | George Sanders | 3 | Son | None | Iowa |
| 98 | Wm Lewis | 36 | Head | Laborer | Iowa |
| 99 | Myrtle Lewis | 36 | Wife | None | Iowa |
| 100 | Harold Lewis | 17 | Son | None | Iowa |
Related Census Records
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)