MH
Mary Harmon — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Washington, Maine
Our Model Tree links this Mary Harmon across the 1920 and 1930 US Censuses in Washington, Maine (XGBoost, ~Confirmed) — first a daughter (b.~1906), then head of a 10-person household.
Age 24
b. ~1906
Female
Daughter
Born: Maine
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Washington, Maine |
| Surname | Harmon |
| Given Name | Mary A |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Maine |
| Father's Birthplace | Maine |
| Mother's Birthplace | Maine |
| Additional Details | |
| Occupation | Teacher |
| Industry | public school |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Maine |
| Birth Country | United States |
| Birthplace (normalized) | maine |
| Occupation | Teacher |
| Township / Ward | East Machias Town |
| Est. Birth Year | ~1906 |
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.
10 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Muriel Harmon | Daughter | — | 14 | ~1916 |
| Ethel Harmon | Daughter | — | 33 | ~1897 |
| Violet Harmon | Daughter | — | 11 | ~1919 |
| Geneva Harmon | Daughter | — | 19 | ~1911 |
| Mary Harmon | Daughter | — | 24 | ~1906 |
| Phyllis Harmon | Daughter | — | 18 | ~1912 |
| George Harmon | Head | — | 53 | ~1877 |
| Delphina Harmon | Other | — | 50 | ~1880 |
| Leon Harmon | Son | — | 21 | ~1909 |
| Horace Harmon | Son | — | 27 | ~1903 |
Census Appearances
1920
Washington, Maine
Daughter, age 14
Washington, Maine · implied b. ~1906 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Harmon |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Maine |
| Father's Birthplace | Maine |
| Mother's Birthplace | Maine |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Maine |
| Birth Country | United States |
| Birthplace (normalized) | maine |
1930
Washington, Maine
Daughter, age 24
Washington, Maine · implied b. ~1906 — 10 household members
| Surname | Harmon |
| Given Name | Mary A |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Maine |
| Father's Birthplace | Maine |
| Mother's Birthplace | Maine |
| Occupation | Teacher |
| Industry | public school |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Maine |
| Birth Country | United States |
| Birthplace (normalized) | maine |
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 Harmon across 2 US Census years (1920 and 1930) in Washington, Maine, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Harmon
Daughter · 1930 · age 24 · b. ~1906 · Maine
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Sibling
Muriel Harmon
Sibling · 1930 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Geneva Harmon
Sibling · 1930 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Violet Harmon
Sibling · 1930 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Leon Harmon
Sibling · 1930 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Phyllis Harmon
Sibling · 1930 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ethel Harmon
Sibling · 1930 · age 33
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Horace Harmon
Sibling · 1930 · age 27
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 — Washington, Maine
Open full size
1930 US Federal Census — Washington, Maine
Page Contents
50 people indexed on this census page (ia:1930:15thcensus840unit:0841)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Charles S Cates | 33 | son | Electrician | Massachusetts |
| 52 | Lealand Cates | 8 | son | None | Maine |
| 53 | Caroline A Cates | 2 | daughter | None | Maine |
| 54 | Richard F Gaddis | 57 | Head | Manufacturer | Maine |
| 55 | Sarah Gaddis | 57 | Wife-H | None | Maine |
| 56 | Richard F Jr Gaddis | 11 | son | None | Maine |
| 57 | Bryant Clair Gaddis | 2 | niece | None | Maine |
| 58 | Millard F Holmes | 51 | Head | Laborer | Maine |
| 59 | Jessie E Holmes | 51 | Wife-H | None | Maine |
| 60 | Maurice M Holmes | 23 | son | Laborer | Maine |
| 61 | Sophronia Dodge | 80 | mother-in-law | None | Maine |
| 62 | Byron M Gaddis | 41 | Head | None | Maine |
| 63 | Francis E Gaddis | 51 | brother | None | Maine |
| 64 | John F Gaddis | 57 | brother | None | Maine |
| 65 | Hubert S Ward | 42 | Head | Laborer | Maine |
| 66 | Bertha T Ward | 42 | Wife-H | None | Maine |
| 67 | Thelma T Ward | 14 | daughter | None | Maine |
| 68 | George H Albee | 40 | Head | Laborer | Maine |
| 69 | Annie Albee | 36 | Wife-H | None | Maine |
| 70 | Robert J Albee | 2 | son | None | Maine |
| 71 | Lydia F Dinsmore | 33 | Lodger | Housekeeper | Maine |
| 72 | Charles S Dinsmore | 7 | Lodger | None | Maine |
| 73 | Frederick H Dinsmore | 1 | Lodger | None | Maine |
| 74 | Arthur L Whitcomb | 62 | Head | Trackman | Maine |
| 75 | Clara E Whitcomb | 34 | Wife-H | None | Maine |
| 76 | Lawrence E Whitcomb | 12 | son | None | Maine |
| 77 | Philip C Whitcomb | 7 | son | None | Maine |
| 78 | Stephen Leman | 21 | Head | None | Canada-English |
| 79 | Ethel D Leman | 21 | Wife-H | None | Maine |
| 80 | Stephen Jr Leman | 1 | son | None | Canada-English |
| 81 | Ralph Leman | 0 | son | None | Maine |
| 82 | Robert Leman | 0 | son | None | Maine |
| 83 | Ethel Leman | 0 | daughter | None | Maine |
| 84 | Elmer E Huntley | 33 | Head | Carpenter | Maine |
| 85 | Grace E Huntley | 31 | Wife-H | None | Maine |
| 86 | Charles H Ingalls | 54 | Head | Contractor | Maine |
| 87 | Jennie B Ingalls | 55 | Wife-H | None | Maine |
| 88 | Charles H Jr Ingalls | 24 | son | Boat Builder | Maine |
| 89 | Kenneth R Ingalls | 16 | son | None | Maine |
| 90 | George W Harmon | 53 | Head | Laborer | Maine |
| 91 | Delphina M Harmon | 50 | Wife-H | None | Maine |
| 92 | Ethel A Harmon | 33 | daughter | Teacher | Maine |
| 93 | Horace E Harmon | 27 | son | None | Maine |
| 94 | Mary A Harmon THIS PERSON | 24 | daughter | Teacher | Maine |
| 95 | Leon E Harmon | 21 | son | Laborer | Maine |
| 96 | Phyllis A Harmon | 18 | daughter | None | Maine |
| 97 | Muriel A Harmon | 14 | daughter | None | Maine |
| 98 | Violet H Harmon | 11 | daughter | None | Maine |
| 99 | Geneva M Harmon | 19 | daughter | None | Maine |
| 100 | Daniel M Griffin | 45 | Head | Maine |
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)