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Mary Wilkins — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Contra-Costa-County, California
Our Model Tree links this Mary Wilkins across the 1930 and 1940 US Censuses in Contra-Costa-County, California (XGBoost, ~Confirmed) — first a daughter (b.~1928), then head of a 7-person household.
Age 12
b. ~1928
Female
Daughter
Born: California
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Contra-Costa-County, California |
| Surname | Wilkins |
| Given Name | Mary B |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | 9 |
| 1935 Residence (County) | Contra Costa |
| Additional Details | |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Township / Ward | 9 |
| Est. Birth Year | ~1928 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| William Wilkins | Head | — | 55 | ~1885 |
| Billy Wilkins | Son | — | 15 | ~1925 |
| Donald Wilkins | Son | — | 20 | ~1920 |
| Liza Wilkins | Spouse | — | 42 | ~1898 |
| Chrystal Wilkins | Daughter | — | 21 | ~1919 |
| Robin Wilkins | Son | — | 6 | ~1934 |
| Mary Wilkins | Daughter | — | 12 | ~1928 |
Census Appearances
1930
Contra Costa, …
Daughter, age 2
Contra Costa, California · implied b. ~1928 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Wilkins |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Texas |
| Mother's Birthplace | Texas |
| Can Read/Write | No |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
Contra-Costa-County, California
Daughter, age 12
Contra-Costa-County, California · implied b. ~1928 — 7 household members
| Surname | Wilkins |
| Given Name | Mary B |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | 9 |
| 1935 Residence (County) | Contra Costa |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
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 Wilkins across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Wilkins
Daughter · 1940 · age 12 · b. ~1928 · California
★ You are viewing this record
Sibling
Robin Wilkins
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Donald Wilkins
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Chrystal Wilkins
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Billy Wilkins
Sibling · 1940 · age 15
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 — Contra-Costa-County, California
Open full size
1940 US Federal Census — Contra-Costa-County, California
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00197-00265)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Jose Haro | 55 | Partner | Laborer | Spain |
| 42 | Paquita|Ipaquita Piquita | 39 | Head | Laborer | Mexico |
| 43 | Alfonso Alcala | 22 | Head | Truck Driver | California |
| 44 | Sofia Alcala | 21 | Wife | — | Mexico |
| 45 | Alfonso Jr Alcala | 1 | Son | — | California |
| 46 | John Gomez | 41 | Hired Hand | Laborer | Spain |
| 47 | Antonio Castillan|Castellan | 27 | Hired Hand | Laborer | California |
| 48 | Diego Martinez | 36 | Hired Hand | Laborer | Spain |
| 49 | Eloy Cansino | 42 | Hired Hand | Laborer | Spain |
| 50 | John C Gomez | 39 | Hired Hand | Laborer | Spain |
| 51 | Diego Molina | 48 | Hired Hand | Laborer | Spain |
| 52 | Julian Canyon | 36 | Hired Hand | Laborer | Spain |
| 53 | Manuel Castillan|Castellan | 38 | Hired Hand | Laborer | Spain |
| 54 | Antonio Santos | 52 | Hired Hand | Laborer | Spain |
| 55 | Frank Castilla | 62 | Hired Hand | Laborer | Spain |
| 56 | Francisco Gomez | 65 | Hired Hand | Laborer | Spain |
| 57 | Diego G Fernandez | 33 | Hired Hand | Laborer | Spain |
| 58 | Diego Ramos | 36 | Hired Hand | Laborer | Spain |
| 59 | Batista Fernandez | 37 | Hired Hand | Laborer | Spain |
| 60 | Diego C Gomez | 65 | Hired Hand | Laborer | Spain |
| 61 | Francisco Sorroche | 46 | Hired Hand | Laborer | Spain |
| 62 | John Munoz | 35 | Hired Hand | Laborer | Spain |
| 63 | Frank Espinoza | 36 | Hired Hand | Laborer | Spain |
| 64 | Joseph Hernandez | 35 | Hired Hand | Laborer | Spain |
| 65 | Joseph Martinez | 59 | Hired Hand | Laborer | Spain |
| 66 | Anthony Ramirez | 47 | Hired Hand | Laborer | Spain |
| 67 | William Wilkins | 55 | Head | General Farm Work | Texas |
| 68 | Liza P Wilkins | 42 | Wife | — | Texas |
| 69 | Chrystal Wilkins | 21 | Daughter | — | Texas |
| 70 | Donald Wilkins | 20 | Son | — | Arizona |
| 71 | Billy James Wilkins | 15 | Son | — | California |
| 72 | Mary B Wilkins THIS PERSON | 12 | Daughter | — | California |
| 73 | Robin Wilkins | 6 | Son | — | California |
| 74 | Motohichi Kikkawa | 39 | Head | Ranch Foreman | Japan |
| 75 | Margaret B Kikkawa | 27 | Wife | Cook | California |
| 76 | Violet Kikkawa | 7 | Daughter | — | California |
| 77 | Betty Kikkawa | 5 | Daughter | — | California |
| 78 | Jean Kikkawa | 3 | Daughter | — | California |
| 79 | Rafael Olivera | 36 | Head | Laborer | Mexico |
| 80 | Angela Olivera | 43 | Wife | Laborer | Mexico |
Related Census Records
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)