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Mary Macdonald — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Clark, Ohio
Our Model Tree links this Mary Macdonald across the 1930 and 1940 US Censuses in Clark, Ohio (XGBoost, ~Confirmed) — first a daughter (b.~1917), then head of a 6-person household.
Age 13
b. ~1917
Female
Daughter
Born: Ohio
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Clark, Ohio |
| Surname | MacDonald |
| Given Name | Mary J |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Township / Ward | Springfield City |
| Est. Birth Year | ~1917 |
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.
6 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Clara Macdonald | Spouse | — | 35 | ~1895 |
| Thomas Macdonald | Son | — | 7 | ~1923 |
| William Macdonald | Son | — | 11 | ~1919 |
| Robert Macdonald | Son | — | 3 | ~1927 |
| William Macdonald | Head | — | 40 | ~1890 |
| Mary Macdonald | Daughter | — | 13 | ~1917 |
Census Appearances
1930
Clark, Ohio
Daughter, age 13
Clark, Ohio · implied b. ~1917 — 6 household members
| Surname | MacDonald |
| Given Name | Mary J |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Can Read/Write | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
Clark-County, Ohio
Daughter, age 23
Clark-County, Ohio · implied b. ~1917 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McDonald |
| Given Name | Mary J. |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Springfield |
| 1935 Residence (County) | Clark |
| Occupation | nurse |
| Industry | private |
| Class of Worker | PW |
| Hours Worked | 52 |
| Income (1939) | 720 |
| Highest Grade | C 4 |
| 1935 Residence | Same house |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
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 Macdonald across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Macdonald
Daughter · 1930 · age 13 · b. ~1917 · Ohio
★ You are viewing this record
Sibling
Robert Macdonald
Sibling · 1930 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Macdonald
Sibling · 1930 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Macdonald
Sibling · 1930 · age 11
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 — Clark, Ohio
Open full size
1930 US Federal Census — Clark, Ohio
Page Contents
50 people indexed on this census page (ia:1930:ohiocensus00reel1757:0356)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Edward P Mclaughlin | 42 | Head | Conductor | Ohio |
| 2 | Margaret Mclaughlin | 36 | Wife | — | Ohio |
| 3 | Mary Ellen Mclaughlin | 6 | Daughter | — | Ohio |
| 4 | James E Mclaughlin | 0 | Son | — | Ohio |
| 5 | Carrie E Agnew | 42 | Head | — | Ohio |
| 6 | John R Agnew | 17 | Son | Clerk | Ohio |
| 7 | James F Dooley | 43 | Head | Mechanical Dentist | Ohio |
| 8 | Martha Dooley | 37 | Wife | Electrician | Ohio |
| 9 | Douglas Dooley | 10 | Son | — | Ohio |
| 10 | Jack Dooley | 8 | Son | — | Ohio |
| 11 | Mary B Hannewald | 40 | Head | — | Ohio |
| 12 | Matilda R Hannewald | 35 | Sister | Bookkeeper | Ohio |
| 13 | Margaret Hannewald | 34 | Sister | Deputy Clerk | Ohio |
| 14 | Ralph L Foster | 34 | Head | Stock Clerk | Ohio |
| 15 | Isabelle Foster | 37 | Wife | Manager | Ohio |
| 16 | Buck E Foster | 25 | Brother | — | Ohio |
| 17 | Catherine Cluckey | 46 | Head | Salesman | Pennsylvania |
| 18 | Frank A Riley | 41 | Head | Clerk | Kansas |
| 19 | Jessie M Riley | 50 | Wife | Construction Foreman | Ohio |
| 20 | Charles Sharp | 45 | Head | Teacher | Ohio |
| 21 | Ada Sharp | 40 | Wife | Carpenter | Ohio |
| 22 | Marguerite Sharp | 19 | Daughter | — | Ohio |
| 23 | E. Lou Sharp | 16 | Son | — | Ohio |
| 24 | James H Cook | 28 | Head | Artist | Ohio |
| 25 | Mary E Cook | 27 | Wife | — | Ohio |
| 26 | Margaret Elfner | 62 | Head | — | Ohio |
| 27 | Ruth Elfner | 24 | Daughter | — | Ohio |
| 28 | Rose Elfner | 19 | Daughter | — | Ohio |
| 29 | Carl Elfner | 26 | Son | — | Ohio |
| 30 | Glenn G Long | 21 | Head | Assembler | Ohio |
| 31 | Iva M Long | 23 | Wife | — | Ohio |
| 32 | Orville E Beam | 47 | Head | Grocer | Ohio |
| 33 | Helen G Beam | 48 | Wife | — | Ohio |
| 34 | Norman H Green | 39 | Head | Tool & Dye Maker | Ohio |
| 35 | Hazel E Green | 38 | Wife | — | Ohio |
| 36 | Robert L Green | 10 | Son | — | Ohio |
| 37 | Paul E Green | 7 | Son | — | Ohio |
| 38 | Clyde Fletcher | 36 | Head | Engineer | Indiana |
| 39 | Leona B Fletcher | 26 | Wife | — | Kentucky |
| 40 | William Macdonald | 40 | Head | Salesman | Ohio |
| 41 | Clara N Macdonald | 35 | Wife | — | Ohio |
| 42 | Mary J Macdonald THIS PERSON | 13 | Daughter | — | Ohio |
| 43 | William G Macdonald | 11 | Son | — | Ohio |
| 44 | Thomas P Macdonald | 7 | Son | — | Ohio |
| 45 | Robert E Macdonald | 3 | Son | — | Ohio |
| 46 | David Howard Whittington | 43 | Head | Service Manager | Ohio |
| 47 | Ruth S Whittington | 41 | Wife | — | Ohio |
| 48 | Hugh S Whittington | 11 | Son | — | Ohio |
| 49 | Mary J Whittington | 9 | Daughter | — | Ohio |
| 50 | Frank R Conover | 52 | Head | Dentist | New Hampshire |
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)