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Mary Blackwell — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Cumberland, Maine
Our Model Tree links this Mary Blackwell across the 1920 and 1930 US Censuses in Cumberland, Maine (XGBoost, ~Confirmed) — first a spouse (b.~1889), then head of a 12-person household.
Age 41
b. ~1889
Female
Spouse
Born: Maine
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Cumberland, Maine |
| Surname | Blackwell |
| Given Name | Mary E. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Maine |
| Age at First Marriage | 32 |
| Father's Birthplace | Maine |
| Mother's Birthplace | Maine |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Maine |
| Birth Country | United States |
| Birthplace (normalized) | maine |
| Township / Ward | Portland City |
| Est. Birth Year | ~1889 |
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.
12 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Charles Blackwell | Son | — | 11 | ~1919 |
| Mary Blackwell | Spouse | — | 41 | ~1889 |
| Phyllis Blackwell | Daughter | — | 17 | ~1913 |
| Dorothy Blackwell | Daughter | — | 15 | ~1915 |
| Barbara Blackwell | Daughter | — | 13 | ~1917 |
| Jean Blackwell | Daughter | — | 6 | ~1924 |
| Lilla Blackwell | Daughter | — | 3 | ~1927 |
| Virginia Blackwell | Daughter | — | ~1930 | |
| William Blackwell | Son | — | 4 | ~1926 |
| Marion Blackwell | Daughter | — | 8 | ~1922 |
| Charles Blackwell | Head | — | 41 | ~1889 |
| Theodore Blackwell | Son | — | 10 | ~1920 |
Census Appearances
1920
Cumberland, Maine
Spouse, age 30
Cumberland, Maine · implied b. ~1890 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blackwell |
| Given Name | Mary E. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Maine |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Maine |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Maine |
| Birth Country | United States |
| Birthplace (normalized) | maine |
1930
Cumberland, Maine
Spouse, age 41
Cumberland, Maine · implied b. ~1889 — 12 household members
| Surname | Blackwell |
| Given Name | Mary E. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Maine |
| Age at First Marriage | 32 |
| Father's Birthplace | Maine |
| Mother's Birthplace | Maine |
| 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 Blackwell across 2 US Census years (1920 and 1930) in Cumberland, Maine, using XGBoost record linkage.
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This person
Anchor record
Mary Blackwell
Spouse · 1930 · age 41 · b. ~1889 · Maine
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Cumberland, Maine
Open full size
1930 US Federal Census — Cumberland, Maine
Page Contents
50 people indexed on this census page (ia:1930:15thcensus831unit:0302)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Fred G. Pease | 23 | Son-in-law | Painter | Maine |
| 52 | Emily G. Pease | 32 | Daughter | Sales Lady | Maine |
| 53 | Richard B. Pease | 5 | Son | — | Maine |
| 54 | Thomas J. Nolan | 47 | Head | Fireman | Irish Free State |
| 55 | Mary C. Nolan | 43 | Wife | — | Maine |
| 56 | Mary E. Nolan | 8 | Daughter | — | Maine |
| 57 | William H. Price | 48 | Head | Salesman | Maine |
| 58 | Ethel M. Price | 47 | Wife | — | Maine |
| 59 | Margaret H. Price | 26 | Daughter | Stenographer | Maine |
| 60 | Ethel H. Clark | 39 | Head | — | Maine |
| 61 | J. Richard Clark | 12 | Son | — | Maine |
| 62 | Robert S. Mason | 61 | Head | — | Canada-English |
| 63 | Frank R. Mason | 22 | Son | Salesman | New Hampshire |
| 64 | Charles L. Elder | 23 | Lodger | Student | Maine |
| 65 | Raymond B. Milford | 21 | Lodger | Aviator | Maine |
| 66 | Wilmer H. Drake | 27 | Lodger | Salesman | Maine |
| 67 | Alvah N. Kitchen | 45 | Head | Sales Manager | Canada-English |
| 68 | Celia C. Kitchen | 43 | Wife | — | Maine |
| 69 | Doris G. Kitchen | 20 | Daughter | Secretary | Maine |
| 70 | Theodore H. Kitchen | 18 | Son | — | Maine |
| 71 | Geneva E. Kitchen | 16 | Daughter | — | Maine |
| 72 | Alvah N., Jr. Kitchen | 11 | Son | — | Maine |
| 73 | Beverley H. Kitchen | 5 | Daughter | — | Maine |
| 74 | John M. Keehan | 37 | Head | Sales Manager | New York |
| 75 | Catherine G. Keehan | 36 | Wife | — | Massachusetts |
| 76 | John B. Keehan | 1 | Son | — | Maine |
| 77 | Thomas J. Mcinnis | 27 | Lodger | Clerical Worker | Germany |
| 78 | Fuller P. Studley | 41 | Head | Sales Manager | Maine |
| 79 | Grace E. Studley | 38 | Wife | — | Maine |
| 80 | John F. Studley | 3 | Son | — | Maine |
| 81 | Charles H. Blackwell | 41 | Head | Chief Clerk | Maine |
| 82 | Mary E. Blackwell THIS PERSON | 41 | Wife | — | Maine |
| 83 | Phyllis E. Blackwell | 17 | Daughter | — | Maine |
| 84 | Dorothy P. Blackwell | 15 | Daughter | — | Maine |
| 85 | Barbara Blackwell | 13 | Daughter | — | Maine |
| 86 | Charles H., Jr. Blackwell | 11 | Son | — | Maine |
| 87 | Theodore G. Blackwell | 10 | Son | — | Maine |
| 88 | Marion Blackwell | 8 | Daughter | — | Maine |
| 89 | Jean Blackwell | 6 | Daughter | — | Maine |
| 90 | William H. Blackwell | 4 | Son | — | Maine |
| 91 | Lilla Blackwell | 3 | Daughter | — | Maine |
| 92 | Virginia G. Blackwell | 0 | Daughter | — | Maine |
| 93 | Lawrence R. Morrill | 24 | Head | Printer | Maine |
| 94 | Dorothy Morrill | 23 | Wife | — | Illinois |
| 95 | James R., Jr. Morrill | 1 | Son | — | Maine |
| 96 | Albert P. Clark | 63 | Head | Messenger | Maine |
| 97 | Lilla H. Clark | 24 | Daughter | — | Maine |
| 98 | John G. Clark | 4 | Grandson | — | Maine |
| 99 | Helen Clark | 2 | Granddaughter | — | Maine |
| 100 | Frederick P. Mconie | 38 | Lodger | Telegrapher | Canada-English |
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)