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Mary Harrison — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Mendocino-County, California
Our Model Tree links this Mary Harrison across the 1920, 1930 and 1940 US Censuses in Mendocino-County, California (XGBoost, ~Confirmed) — first a spouse (b.~1868), then head of a 3-person household.
Age 72
b. ~1868
Female
Spouse
Born: Finland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Mendocino-County, California |
| Surname | Harrison |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 72 |
| Marital Status | Married |
| Birthplace | Finland |
| 1935 Residence (City) | Ten Mile |
| 1935 Residence (County) | Mendocino |
| Naturalization Status | Naturalized |
| Additional Details | |
| Highest Grade | No 1 |
| 1935 Residence | Same place |
| Birth Country | Finland |
| Birthplace (normalized) | finland |
| Township / Ward | Ten Mile |
| Est. Birth Year | ~1868 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Irene Harrison | Daughter | — | 40 | ~1900 |
| William Harrison | Head | — | 74 | ~1866 |
| Mary Harrison | Spouse | — | 72 | ~1868 |
Census Appearances
1920
Mendocino, California
Spouse, age 52
Mendocino, California · implied b. ~1868 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Harrison |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Finland |
| Year of Immigration | 1891 |
| Naturalization Status | Alien |
| Father's Birthplace | Finland |
| Mother's Birthplace | Finland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Swedish |
| Birth Country | Finland |
| Birthplace (normalized) | finland |
1930
Mendocino, California
Other, age 62
Mendocino, California · implied b. ~1868 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Harrison |
| Given Name | Mary |
| Relationship to Head | wife-H |
| Sex | F |
| Color / Race | White |
| Age | 62 |
| Marital Status | Married |
| Birthplace | Finland |
| Naturalization Status | Alien |
| Year of Immigration | 1905 |
| Age at First Marriage | 20 |
| Father's Birthplace | Finland |
| Mother's Birthplace | Finland |
| Occupation | none |
| Can Read/Write | Yes |
| Mother Tongue | Swedish |
| Birth Country | Finland |
| Birthplace (normalized) | finland |
1940
Mendocino-County, California
Spouse, age 72
Mendocino-County, California · implied b. ~1868 — 3 household members
| Surname | Harrison |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 72 |
| Marital Status | Married |
| Birthplace | Finland |
| 1935 Residence (City) | Ten Mile |
| 1935 Residence (County) | Mendocino |
| Naturalization Status | Naturalized |
| Highest Grade | No 1 |
| 1935 Residence | Same place |
| Birth Country | Finland |
| Birthplace (normalized) | finland |
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 Harrison across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Harrison
Spouse · 1940 · age 72 · b. ~1868 · California
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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 — Mendocino-County, California
Open full size
1940 US Federal Census — Mendocino-County, California
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00263-00493)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Annie Phillips | 28 | Wife | — | California |
| 42 | Carol Ann Phillips | 6 | Daughter | — | California |
| 43 | Frank Ketner | 34 | Head | Faller | California |
| 44 | Dean Ketner | 19 | Wife | — | Georgia |
| 45 | Ethel Unselt | 40 | Head | Farmer | Washington |
| 46 | Charles Unselt | 16 | Son | — | California |
| 47 | Claude Unselt | 9 | Daughter | — | California |
| 48 | William Harrison | 74 | Head | Farmer | Finland |
| 49 | Mary Harrison THIS PERSON | 72 | Wife | — | Finland |
| 50 | Irene Harrison | 40 | Daughter | — | California |
| 51 | Eaton Eyreand | 39 | Head | Brakeman | California |
| 52 | Jessie Eyreand | 34 | Wife | — | California |
| 53 | June De Flores | 9 | Lodger | — | California |
| 54 | Marie Birdsong | 61 | Head | — | Austria |
| 55 | Gloria J. Chrystal | 4 | Granddaughter | — | California |
| 56 | Harry Wainwright | 67 | Head | Farmer | Connecticut |
| 57 | Fred De Quire | 66 | Head | — | New York |
| 58 | Cora De Quire | 58 | Wife | — | Wisconsin |
| 59 | Melvin E. Dunn | 30 | Head | Operator | Idaho |
| 60 | Francis H. Dunn | 26 | Wife | — | Michigan |
| 61 | Patricia A. Dunn | 6 | Daughter | — | California |
| 62 | Donald A. Dunn | 5 | Son | — | California |
| 63 | Kenneth A. Dunn | 3 | Son | — | California |
| 64 | Beth Joshua Ferguson | 47 | Head | Faller | Washington |
| 65 | Grace Ferguson | 44 | Wife | — | California |
| 66 | Edwin C. Ferguson | 25 | Son | Faller | California |
| 67 | Ross S. Ferguson | 20 | Son | Piler | California |
| 68 | Maybelle M. Ferguson | 16 | Daughter | — | California |
| 69 | William R. Ferguson | 15 | Son | — | California |
| 70 | Jack K. Ferguson | 13 | Son | — | California |
| 71 | Richard L. Ferguson | 9 | Son | — | California |
| 72 | Carlos Hill | 71 | Head | — | Finland |
| 73 | Amanda Hill | 64 | Wife | — | Finland |
| 74 | Donald Fulton | 31 | Head | Cleaner | Illinois |
| 75 | Luverne Fulton | 23 | Wife | — | No. Dakota |
| 76 | Beverly Fulton | 1 | Daughter | — | California |
| 77 | Winifred Ness | 25 | Head | — | Oregon |
| 78 | Barbara J. Ness | 5 | Daughter | — | California |
| 79 | Karen L. Ness | 2 | Daughter | — | California |
| 80 | Nellie Haek | 21 | Sister | Housework | California |
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)