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Mary Buchanan — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Harford, Maryland
Our Model Tree links this Mary Buchanan across the 1920 and 1930 US Censuses in Harford, Maryland (XGBoost, ~Confirmed) — first a daughter (b.~1911), then head of a 8-person household.
Age 19
b. ~1911
Female
Daughter
Born: Maryland
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Harford, Maryland |
| Surname | Buchanan |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | 4Th Election District |
| Est. Birth Year | ~1911 |
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.
8 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Jerry Buchanan | Head | — | 41 | ~1889 |
| Jennie Buchanan | Daughter | — | 17 | ~1913 |
| Mary Buchanan | Daughter | — | 19 | ~1911 |
| Pauline Buchanan | Daughter | — | 14 | ~1916 |
| Regenia Buchanan | Daughter | — | 10 | ~1920 |
| Mary Buchanan | Other | — | 40 | ~1890 |
| George Buchanan | Son | — | 5 | ~1925 |
| Jerry Buchanan | Son | — | 6 | ~1924 |
Census Appearances
1920
Harford, Maryland
Daughter, age 9
Harford, Maryland · implied b. ~1911 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Buchannan |
| Given Name | Martha L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Harford, Maryland
Daughter, age 19
Harford, Maryland · implied b. ~1911 — 8 household members
| Surname | Buchanan |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
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 Buchanan across 2 US Census years (1920 and 1930) in Harford, Maryland, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Buchanan
Daughter · 1930 · age 19 · b. ~1911 · Maryland
★ You are viewing this record
Sibling
Jerry Buchanan
Sibling · 1930 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jennie Buchanan
Sibling · 1930 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Regenia Buchanan
Sibling · 1930 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Pauline Buchanan
Sibling · 1930 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
George Buchanan
Sibling · 1930 · age 5
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 — Harford, Maryland
Open full size
1930 US Federal Census — Harford, Maryland
Page Contents
47 people indexed on this census page (ia:1930:15thcensus875unit:0970)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | James W. Tyson | 9 | Son | — | Maryland |
| 53 | William H. Tyson | 4 | Son | — | Maryland |
| 56 | Harlan H. Tyson | 42 | Brother | Laborer | Maryland |
| 57 | George Bore | 54 | Boarder | Laborer | North Carolina |
| 58 | Rachel Bore | 44 | Boarder | — | North Carolina |
| 59 | Arthur G. Wilson | 38 | Head | Laborer | Pennsylvania |
| 60 | Hattie E. Wilson | 21 | Wife-H | — | Maryland |
| 61 | Rosa J. Wilson | 4 | Daughter | — | Maryland |
| 62 | Robert G. Wilson | 2 | Son | — | Maryland |
| 63 | Grace A. Wilson | 0 | Daughter | — | Maryland |
| 64 | Moses Alfred Dorsey | 7 | Step son | — | Maryland |
| 65 | James Jones | 40 | Head | Laborer | Virginia |
| 66 | Dorothy Jones | 18 | Wife-H | — | Maryland |
| 67 | Peter Vagonhoffer | 72 | Head | Laborer | New York |
| 68 | Elsie Vagonhoffer | 31 | Wife-H | — | Maryland |
| 69 | John Vagonhoffer | 11 | Son | — | Maryland |
| 70 | Emma M. Vagonhoffer | 10 | Daughter | — | Maryland |
| 71 | Myrtle Vagonhoffer | 4 | Daughter | — | Maryland |
| 72 | David V. St. Clair | 76 | Head | Farmer | Maryland |
| 73 | Lula H. Rutledge | 44 | Daughter-H | — | Maryland |
| 74 | William St. Clair | 15 | Grand son | — | Maryland |
| 75 | Dorothy St. Clair | 13 | Grand daughter | — | Maryland |
| 76 | Martha Norman | 19 | Servant | Servant | North Carolina |
| 77 | Jerry W. Buchanan | 41 | Head | Laborer | Maryland |
| 78 | Mary M. Buchanan | 40 | Wife-H | — | Maryland |
| 79 | Mary E. Buchanan THIS PERSON | 19 | Daughter | — | Maryland |
| 80 | Jennie G. Buchanan | 17 | Daughter | — | Maryland |
| 81 | Pauline L. Buchanan | 14 | Daughter | — | Maryland |
| 82 | Regenia A. Buchanan | 10 | Daughter | — | Maryland |
| 83 | Jerry W. Buchanan | 6 | Son | — | Pennsylvania |
| 84 | George B. Buchanan | 5 | Son | — | Pennsylvania |
| 85 | Allen H. St. Clair | 41 | Head | Farmer | Maryland |
| 86 | Virginia C. St. Clair | 41 | Wife-H | — | Pennsylvania |
| 87 | Mildred G. St. Clair | 9 | Daughter | — | Maryland |
| 88 | Charles W. St. Clair | 7 | Son | — | Maryland |
| 89 | Clifton Lewis | 30 | Boarder | Laborer | Maryland |
| 90 | James E. Copenhaver | 66 | Head | Farmer | North Carolina |
| 91 | Laura E. Copenhaver | 65 | Wife-H | — | North Carolina |
| 92 | Pauline G. Copenhaver | 14 | Daughter | — | North Carolina |
| 93 | James F. Copenhaver | 12 | Son | — | North Carolina |
| 94 | Roscoe D. Copenhaver | 10 | Son | — | Iowa |
| 95 | Mary M. Copenhaver | 8 | Daughter | — | Maryland |
| 96 | Dorothy L. Copenhaver | 3 | Daughter | — | Maryland |
| 97 | Josephine Copenhaver | 39 | Daughter | Laborer | North Carolina |
| 98 | Frederick Monks | 42 | Head | Laborer | Maryland |
| 99 | Pearl M. Monks | 32 | Wife-H | — | Pennsylvania |
| 100 | Clarence G. Monks | 4 | Son | — | Maryland |
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)