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Mary Mccoy — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Alameda, California
Our Model Tree links this Mary Mccoy across the 1910, 1920 and 1930 US Censuses in Alameda, California (XGBoost, ~Confirmed) — first a spouse (b.~1884), then head of a 4-person household.
Age 46
b. ~1884
Female
Spouse
Born: Vermont
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Alameda, California |
| Surname | McCoy |
| Given Name | Mary L |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 46 |
| Marital Status | Married |
| Birthplace | Vermont |
| Age at First Marriage | 20 |
| Father's Birthplace | Vermont |
| Mother's Birthplace | Vermont |
| Additional Details | |
| Occupation | Housewife |
| Industry | Home |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth State | Vermont |
| Birth Country | United States |
| Birthplace (normalized) | vermont |
| Occupation | Housewife |
| Township / Ward | Livermore |
| Est. Birth Year | ~1884 |
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.
4 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Charles Mccoy | Head | — | 53 | ~1877 |
| James Mccoy | Son | — | 19 | ~1911 |
| Charles Mccoy | Son | — | 14 | ~1916 |
| Mary Mccoy | Spouse | — | 46 | ~1884 |
Census Appearances
1910
Alameda, California
Spouse, age 27
Alameda, California · implied b. ~1883 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCoy |
| Given Name | Mary S. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Vermont |
| Years Married | 5 |
| Children Born | 3 |
| Children Living | 3 |
| Father's Birthplace | Vermont |
| Mother's Birthplace | Vermont |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | English |
| Birth State | Vermont |
| Birth Country | United States |
| Birthplace (normalized) | vermont |
1920
Alameda, California
Spouse, age 36
Alameda, California · implied b. ~1884 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCoy |
| Given Name | Mary L. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Vermont |
| Father's Birthplace | Vermont |
| Mother's Birthplace | Vermont |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Vermont |
| Birth Country | United States |
| Birthplace (normalized) | vermont |
1930
Alameda, California
Spouse, age 46
Alameda, California · implied b. ~1884 — 4 household members
| Surname | McCoy |
| Given Name | Mary L |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 46 |
| Marital Status | Married |
| Birthplace | Vermont |
| Age at First Marriage | 20 |
| Father's Birthplace | Vermont |
| Mother's Birthplace | Vermont |
| Occupation | Housewife |
| Industry | Home |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth State | Vermont |
| Birth Country | United States |
| Birthplace (normalized) | vermont |
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 Mccoy across 3 US Census years (1910, 1920 and 1930) in Alameda, California, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Mccoy
Spouse · 1930 · age 46 · b. ~1884 · California
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Alameda, California
Open full size
1930 US Federal Census — Alameda, California
Page Contents
50 people indexed on this census page (ia:1930:acpl_california_10_reel10:0879)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Edward Hirch | 62 | Husband | Foreman | Michigan |
| 52 | Purcell Michael Hirch | 42 | Laborer | Laborer | Pennsylvania |
| 53 | Harry Hugh | 37 | Laborer | Laborer | Maryland |
| 54 | Hans C Freese | 61 | Head | Farmer | Denmark |
| 55 | Fred M Thompson | 55 | Head | Gardner | New York |
| 56 | Maud Thompson | 47 | Wife | Housewife | Iowa |
| 57 | William Kyser | 29 | Step-son | Laborer | Nebraska |
| 58 | Helen Kyser | 24 | Step-daughter | Housewife | Ohio |
| 59 | Helen May Kyser | 6 | Grand daughter | — | Washington |
| 60 | Ann Belle Kyser | 4 | Grand daughter | — | Washington |
| 61 | William B. Kyser | 2 | Grand son | — | Washington |
| 62 | Walter Thompson | 17 | Son | Laborer | Washington |
| 63 | Harry M Thompson | 14 | Son | Public School | Washington |
| 64 | Maryalo M Thompson | 7 | Daughter | Public School | Oregon |
| 65 | Kenneth L Thompson | 2 | Son | — | California |
| 66 | Bernard Dalmazzo | 43 | Head | Owner | Italy |
| 67 | Margarete Dalmazzo | 44 | Wife | Housewife | California |
| 68 | Dorothy Burrage | 15 | Step-daughter | Public School | California |
| 69 | Alice Burrage | 10 | Step-daughter | Public School | California |
| 70 | Carl H Wente | 77 | Head | Retired | Germany |
| 71 | Barbara Wente | 64 | Wife | Housewife | Germany |
| 72 | Carolyn H Wente | 41 | Daughter | At Home | California |
| 73 | Christian Walstad | 71 | Laborer | Laborer | Denmark |
| 74 | Rudolph Neilsen | 40 | Head | Farmer | California |
| 75 | Lily Neilsen | 32 | Wife | Housewife | California |
| 76 | Irene Neilsen | 11 | Daughter | Public School | California |
| 77 | Raymond Neilsen | 8 | Son | Public School | California |
| 78 | Andrew E Byer | 68 | Head | Farmer | Denmark |
| 79 | Christina Byer | 67 | Wife | Housewife | Denmark |
| 80 | Chester Hyer | 30 | Head | Farmer | California |
| 81 | Elsie R Hyer | 28 | Wife | Housewife | California |
| 82 | Alwyn Hyer | 7 | Son | Public School | California |
| 83 | Audry A Hyer | 5 | Daughter | — | California |
| 84 | Nels Nissen | 63 | Laborer | Laborer | Denmark |
| 85 | Jacob R Sachau | 75 | Head | Retired | Germany |
| 86 | Margarete Sachau | 70 | Wife | Housewife | California |
| 87 | Louis Sachau | 49 | Son | Musician | California |
| 88 | Arthur Sachau | 38 | Son | Painter | California |
| 89 | Waldon Olsen | 18 | Head | Farmer | California |
| 90 | Oscar Lundberg | 30 | Caretaker | Caretaker | Sweden |
| 91 | Angelo Antonini | 48 | Head | Farmer | Italy |
| 92 | Antonia Antonini | 37 | Wife | Housewife | Italy |
| 93 | Lorenzo Antonini | 18 | Son | Bookkeeper | California |
| 94 | Joe Antonini | 16 | Son | High School | California |
| 95 | Angelo Antonini | 12 | Son | Sisters School | California |
| 96 | Regina Antonini | 7 | Daughter | Sisters School | California |
| 97 | Charles H Mccoy | 53 | Head | Carpenter | California |
| 98 | Mary L Mccoy THIS PERSON | 46 | Wife | Housewife | Vermont |
| 99 | James H Mccoy | 19 | Son | Clerk | California |
| 100 | Charles H Mccoy | 14 | Son | College | California |
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)