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John Dempsey — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Lucas-County, Ohio
Our Model Tree links this John Dempsey across the 1930 and 1940 US Censuses in Lucas-County, Ohio (XGBoost, ~Confirmed) — first a son (b.~1929), then head of a 8-person household.
Age 11
b. ~1929
Male
Son
Born: Ohio
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Lucas-County, Ohio |
| Surname | Dempsey |
| Given Name | John T. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Toledo |
| 1935 Residence (County) | Lucas |
| Additional Details | |
| Highest Grade | 3 |
| 1935 Residence | Same house |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Township / Ward | Toledo |
| Est. Birth Year | ~1929 |
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 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Elizabeth Dempsey | Daughter | — | 14 | ~1926 |
| Virginia Dempsey | Daughter | — | 12 | ~1928 |
| John Dempsey | Son | — | 11 | ~1929 |
| Carrie O'Hara | Other | — | 65 | ~1875 |
| Nina Dempsey | Spouse | — | 32 | ~1908 |
| Joan Dempsey | Daughter | — | 5 | ~1935 |
| Richard Dempsey | Son | — | 9 | ~1931 |
| Joseph Dempsey | Head | — | 58 | ~1882 |
Census Appearances
1930
Lucas, Ohio
Son, age 1
Lucas, Ohio · implied b. ~1929 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Dempsey |
| Given Name | John J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Ohio |
| Age at First Marriage | 1 7/12 |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Can Read/Write | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
Lucas-County, Ohio
Son, age 11
Lucas-County, Ohio · implied b. ~1929 — 8 household members
| Surname | Dempsey |
| Given Name | John T. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Toledo |
| 1935 Residence (County) | Lucas |
| Highest Grade | 3 |
| 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 John Dempsey across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Dempsey
Son · 1940 · age 11 · b. ~1929 · Ohio
★ You are viewing this record
Sibling
Joan Dempsey
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Virginia Dempsey
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Dempsey
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elizabeth Dempsey
Sibling · 1940 · age 14
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 — Lucas-County, Ohio
Open full size
1940 US Federal Census — Lucas-County, Ohio
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-03257-00221)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Rachel M. Hennessy | 40 | Wife | Inspector | Michigan |
| 42 | Lucille Hennessy | 14 | Daughter | — | Ohio |
| 43 | John R. Hennessy | 12 | Son | — | Ohio |
| 44 | John W. Tucker | 27 | Head | Yard Foreman | Michigan |
| 45 | Marcile L. Tucker | 23 | Wife | — | Ohio |
| 46 | John W. Tucker | 4 | Son | — | Ohio |
| 47 | Richard C. Tucker | 1 | Son | — | Ohio |
| 49 | Emma M. Mettie | 71 | Head | — | Michigan |
| 50 | James L. Webb | 44 | Head | — | Kentucky |
| 51 | Myrtle S. Webb | 41 | Wife | — | Ohio |
| 52 | Alice M. Webb | 14 | Daughter | — | Ohio |
| 53 | Roberta Kirchner | 5 | Granddaughter | — | Ohio |
| 54 | Joseph W. Dempsey | 58 | Head | Clay Mixer | Ohio |
| 55 | Nina M. Dempsey | 32 | Wife | Cook | Ohio |
| 56 | Elizabeth J. Dempsey | 14 | Daughter | — | Ohio |
| 57 | Virginia M. Dempsey | 12 | Daughter | — | Ohio |
| 58 | John T. Dempsey THIS PERSON | 11 | Son | — | Ohio |
| 59 | Richard D. Dempsey | 9 | Son | — | Ohio |
| 60 | Joan Dempsey | 5 | Daughter | — | Ohio |
| 61 | Carrie C. O'Hara | 65 | Sister | — | Ohio |
| 62 | Charles W. Hartwick | 57 | Head | Switchman | Michigan |
| 63 | Delia C. Hartwick | 47 | Wife | — | Michigan |
| 64 | Meredith C. Hartwick | 17 | Son | Newsboy | Michigan |
| 65 | Harry F. Myers | 21 | Head | Truck Driver | Ohio |
| 66 | Pearl W. Myers | 18 | Wife | — | Ohio |
| 67 | Marvin L. Myers | 1 | Son | — | Ohio |
| 68 | Margaret A. Tripp | 57 | Head | — | Michigan |
| 69 | Cecil J. Tripp | 27 | Son | Truck Driver | Michigan |
| 70 | Doris G. Tripp | 24 | Daughter | Book Binder | Michigan |
| 71 | Elton L. Euler | 26 | Head | Salesman | Ohio |
| 72 | Virginia G. Euler | 25 | Wife | — | Ohio |
| 73 | Julianna D. Euler | 0 | Daughter | — | Ohio |
| 74 | John Kanoff | 49 | Head | Laborer | Bulgaria |
| 75 | Donna Kanoff | 42 | Wife | — | Bulgaria |
| 76 | Sonha Kanoff | 17 | Daughter | — | Bulgaria |
| 77 | Mary Kanoff | 9 | Daughter | — | Ohio |
| 78 | Clair W. Walker | 41 | Head | Carpenter | Canada-English |
| 79 | Norman R. Walker | 16 | Son | — | New York |
| 80 | Ratta M. Walker | 14 | Daughter | — | New York |
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)