MC
Mary Corcoran — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Clark-County, Ohio
Our Model Tree links this Mary Corcoran across the 1930 and 1940 US Censuses in Clark-County, Ohio (XGBoost, ~Confirmed) — first a daughter (b.~1921), then head of a 6-person household.
Age 19
b. ~1921
Female
Daughter
Born: Ohio
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Clark-County, Ohio |
| Surname | Corcoran |
| Given Name | Mary L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Springfield |
| 1935 Residence (County) | Clark |
| Additional Details | |
| Industry | 0 |
| Class of Worker | 0 |
| Highest Grade | C-1 |
| 1935 Residence | Same Place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Township / Ward | Springfield |
| Est. Birth Year | ~1921 |
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 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Anna Corcoran | Spouse | — | 44 | ~1896 |
| Mary Corcoran | Daughter | — | 19 | ~1921 |
| Marjorie Corcoran | Daughter | — | 17 | ~1923 |
| Ann Corcoran | Daughter | — | 22 | ~1918 |
| Thomas Corcoran | Head | — | 46 | ~1894 |
| Rita Corcoran | Daughter | — | 7 | ~1933 |
Census Appearances
1930
Clark, Ohio
Daughter, age 9
Clark, Ohio · implied b. ~1921 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Corcoran |
| Given Name | Mary L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Ohio |
| Can Read/Write | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
Clark-County, Ohio
Daughter, age 19
Clark-County, Ohio · implied b. ~1921 — 6 household members
| Surname | Corcoran |
| Given Name | Mary L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Springfield |
| 1935 Residence (County) | Clark |
| Industry | 0 |
| Class of Worker | 0 |
| Highest Grade | C-1 |
| 1935 Residence | Same Place |
| 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 Corcoran across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Corcoran
Daughter · 1940 · age 19 · b. ~1921 · Ohio
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Sibling
Marjorie Corcoran
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rita Corcoran
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ann Corcoran
Sibling · 1940 · age 22
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
1940 US Federal Census — Clark-County, Ohio
Open full size
1940 US Federal Census — Clark-County, Ohio
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03039-00549)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Edward Murray | 39 | Head | Building Supplies | Ohio |
| 42 | Marshall Murray | 32 | Wife | — | Ohio |
| 43 | Richard S. Murray | 2 | Son | — | Ohio |
| 44 | Robert M. Powell | 38 | Head | Cleaner & Presser | Ohio |
| 45 | Ruth G. Powell | 39 | Wife | — | Ohio |
| 46 | Robert G. Powell | 10 | Son | — | Ohio |
| 47 | David R. Powell | 8 | Son | — | Ohio |
| 48 | Virginia L. Powell | 2 | Daughter | — | Ohio |
| 49 | Louise Bancroft | 60 | Mother-in-law | Sales Clerk | Ohio |
| 50 | Charles A. Washburn | 47 | Head | Mail Clerk | Ohio |
| 51 | Ruth Washburn | 46 | Wife | — | Ohio |
| 52 | Mary A. Miller | 80 | Mother-in-law | — | Ohio |
| 53 | Dora Miller | 53 | Daughter-in-law | — | Ohio |
| 54 | Thomas M. Corcoran | 46 | Head | Truck Driver | Mass |
| 55 | Anna V. Corcoran | 44 | Wife | — | Mass |
| 56 | Ann J. Corcoran | 22 | Daughter | Teacher | Ohio |
| 57 | Mary L. Corcoran THIS PERSON | 19 | Daughter | — | Ohio |
| 58 | Marjorie Corcoran | 17 | Daughter | — | Ohio |
| 59 | Rita Corcoran | 7 | Daughter | — | Ohio |
| 60 | Victor La Rue | 41 | Head | Receiving Clerk | Ohio |
| 61 | Hazel S. La Rue | 36 | Wife | — | Ohio |
| 62 | William H. Cooney | 39 | Head | Stock Clerk | Ohio |
| 63 | Hazel J. Cooney | 36 | Wife | — | Ohio |
| 64 | Mary A. Cooney | 12 | Daughter | — | Ohio |
| 65 | Rita J. Cooney | 10 | Daughter | — | Ohio |
| 66 | Dafney Edna Carty | 63 | Mother-in-law | — | Ohio |
| 67 | Howard L. Snider | 47 | Head | Clerk | Ohio |
| 68 | Ruth M. Snider | 38 | Wife | — | Ohio |
| 69 | Marilyn Snider | 5 | Daughter | — | Ohio |
| 70 | Kathleen Snider | 6 | Daughter | — | Ohio |
| 71 | William T. Young | 49 | Head | Manager | Ohio |
| 72 | Florence O. Young | 35 | Wife | — | Ohio |
| 73 | David A. Young | 2 | Son | — | Ohio |
| 74 | Adolph Flube | 76 | Head | Jewelry Store | Germany |
| 75 | Rebecca J. Flube | 70 | Wife | — | Iowa |
| 76 | Gretchen Flube | 52 | Daughter | Clerk | Ohio |
| 77 | Raymond R. Durer | 30 | Head | Civil Engineer | Ohio |
| 78 | Dorothy X. Durer | 24 | Wife | — | Ohio |
| 79 | Louis E. Huennerkopf | 23 | Head | Photographer Finish | Illinois |
| 80 | Marie K. Huennerkopf | 21 | Wife | — | Illinois |
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)