MD
Mary Dempsey — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cuyahoga-County, Ohio
Our Model Tree links this Mary Dempsey across the 1930 and 1940 US Censuses in Cuyahoga-County, Ohio (XGBoost, ~Confirmed) — first a daughter (b.~1923), then head of a 9-person household.
Age 17
b. ~1923
Female
Daughter
Born: Ohio
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cuyahoga-County, Ohio |
| Surname | Dempsey |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Euclid City |
| 1935 Residence (County) | Cuyahoga |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Same House |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Township / Ward | Euclid City |
| Est. Birth Year | ~1923 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| William Dempsey | Son | — | 20 | ~1920 |
| Kathleen Dempsey | Daughter | — | ~1940 | |
| Nancy Schudli | Other | — | 17 | ~1923 |
| Joseph Dempsey | Son | — | 18 | ~1922 |
| Joseph Dempsey | Head | — | 54 | ~1886 |
| Danny Dempsey | Son | — | 2 | ~1938 |
| Terry Dempsey | Son | — | 1 | ~1939 |
| Winifred Dempsey | Spouse | — | 51 | ~1889 |
| Mary Dempsey | Daughter | — | 17 | ~1923 |
Census Appearances
1930
Cuyahoga, Ohio
Daughter, age 7
Cuyahoga, Ohio · implied b. ~1923 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Dempsey |
| Given Name | Mary Florence |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
Cuyahoga-County, Ohio
Daughter, age 17
Cuyahoga-County, Ohio · implied b. ~1923 — 9 household members
| Surname | Dempsey |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Euclid City |
| 1935 Residence (County) | Cuyahoga |
| Income (1939) | 0 |
| Highest Grade | H 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 Dempsey across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Dempsey
Daughter · 1940 · age 17 · b. ~1923 · Ohio
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Sibling
William Dempsey
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Kathleen Dempsey
Sibling · 1940 · age
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Danny Dempsey
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Dempsey
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Terry Dempsey
Sibling · 1940 · age 1
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 — Cuyahoga-County, Ohio
Open full size
1940 US Federal Census — Cuyahoga-County, Ohio
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03052-00161)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Burton Fillmore | 35 | Head | Carpenter | Ohio |
| 42 | Betty Fillmore | 34 | Wife | — | Ohio |
| 43 | Barbara Fillmore | 6 | Daughter | — | Ohio |
| 44 | Charles E. Carr | 43 | Head | Salesman | North Dakota |
| 45 | Gladys Carr | 42 | Wife | — | Kentucky |
| 46 | Joy Diane Carr | 6 | Daughter | — | Ohio |
| 47 | Charlene Carr | 2 | Daughter | — | Ohio |
| 48 | Prissie Brown | 67 | Mother | — | Kentucky |
| 49 | Clifton Michael | 35 | Head | Office Clerk | Pennsylvania |
| 50 | Harriet Michael | 31 | Wife | — | New York |
| 51 | Clifton Jr. Michael | 5 | Son | — | Ohio |
| 52 | Joseph H. Dempsey | 54 | Head | Medical Doctor | Ohio |
| 53 | Winifred Dempsey | 51 | Wife | — | Ohio |
| 54 | William Dempsey | 20 | Son | Life Guard | Ohio |
| 55 | Joseph Dempsey | 18 | Son | Janitor | Ohio |
| 56 | Mary Dempsey THIS PERSON | 17 | Daughter | — | Ohio |
| 57 | Danny Dempsey | 2 | Son | — | Ohio |
| 58 | Terry Dempsey | 1 | Son | — | Ohio |
| 59 | Kathleen Dempsey | 0 | Daughter | — | Ohio |
| 60 | Nancy Schudli | 17 | Servant | Servant | Ohio |
| 61 | Thomas Dougherty | 64 | Head | Watchman | Pennsylvania |
| 62 | Elizabeth Dougherty | 63 | Wife | — | Michigan |
| 63 | John Tait | 42 | Son-in-law | Superintendent | New York |
| 64 | Eva Tait | 42 | Daughter | — | Michigan |
| 65 | John Jr. Tait | 9 | Grandson | — | Ohio |
| 66 | Harry Onderdonk | 60 | Head | Carpenter | W. Virginia |
| 67 | Pearl Onderdonk | 53 | Wife | — | Ohio |
| 68 | Harry Brown | 55 | Head | Asst. Vice President | Ohio |
| 69 | Maude Brown | 42 | Wife | — | Ohio |
| 70 | George Neil | 48 | Head | Lawyer | Wisconsin |
| 71 | Katherine Neil | 46 | Wife | — | Virginia |
| 72 | George M. Neil | 8 | Son | — | Ohio |
| 73 | Fred C. Wilk | 44 | Head | Civil Engineer | Ohio |
| 74 | Beatrice Wilk | 41 | Wife | — | Ohio |
| 75 | Robert Wilk | 19 | Son | Sales Clerk | Ohio |
| 76 | Janet Wilk | 11 | Daughter | — | Ohio |
| 77 | Lloyd Wilk | 6 | Son | — | Ohio |
| 78 | Bertha Krielbach | 30 | Lodger | Waitress | Ohio |
| 79 | Kenneth O'Dell | 41 | Head | Superintendent | Ohio |
| 80 | Margaret O'Dell | 40 | Wife | — | Ohio |
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)