JD
John Dempsey — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Baltimore-City-County, Maryland
Our Model Tree links this John Dempsey across the 1930 and 1940 US Censuses in Baltimore-City-County, Maryland (XGBoost, ~Confirmed) — first a son (b.~1921), then head of a 10-person household.
Age 19
b. ~1921
Male
Son
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Baltimore-City-County, Maryland |
| Surname | Dempsey |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore City |
| Additional Details | |
| Occupation | New Worker |
| Hours Worked | 0 |
| Highest Grade | H-1 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | New Worker |
| Township / Ward | Baltimore City |
| 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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Elnora Dempsey | Daughter | — | 21 | ~1919 |
| Margie Dempsey | Daughter | — | 17 | ~1923 |
| Elizabeth Dempsey | Daughter | — | 20 | ~1920 |
| Jerome Dempsey | Son | — | 12 | ~1928 |
| Charlotte Dempsey | Daughter | — | 7 | ~1933 |
| Patricia Dempsey | Daughter | — | 15 | ~1925 |
| Robert Dempsey | Son | — | 11 | ~1929 |
| John Dempsey | Son | — | 19 | ~1921 |
| John Dempsey | Head | — | 47 | ~1893 |
| Elizabeth Dempsey | Spouse | — | 47 | ~1893 |
Census Appearances
1930
Baltimore, Maryland
Son, age 10
Baltimore, Maryland · implied b. ~1920 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Dempsey |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| 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 |
1940
Baltimore-City-County, Maryland
Son, age 19
Baltimore-City-County, Maryland · implied b. ~1921 — 10 household members
| Surname | Dempsey |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore City |
| Occupation | New Worker |
| Hours Worked | 0 |
| Highest Grade | H-1 |
| 1935 Residence | Same place |
| 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 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 19 · b. ~1921 · Maryland
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Sibling
Patricia Dempsey
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elnora Dempsey
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elizabeth Dempsey
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Dempsey
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charlotte Dempsey
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margie Dempsey
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jerome Dempsey
Sibling · 1940 · age 12
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 — Baltimore-City-County, Maryland
Open full size
1940 US Federal Census — Baltimore-City-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01511-00288)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Joseph Ponzello | 67 | Head | Proprietor | Italy |
| 2 | Angela Ponzello | 65 | Wife | — | Italy |
| 3 | Anthony Ponzello | 41 | Son | Bartender | Maryland |
| 4 | David Ponzello | 33 | Son | Proprietor | Maryland |
| 5 | Julius Kurtis | 38 | Head | Chauffeur | Maryland |
| 6 | Irene Kurtis | 38 | Wife | — | Maryland |
| 7 | Joseph Belman | 45 | Lodger | Laborer | Maryland |
| 8 | Sylvia Belman | 20 | Lodger | Machinist | Maryland |
| 9 | John Dempsey | 47 | Head | Machinist | Maryland |
| 10 | Elizabeth Dempsey | 47 | Wife | — | Maryland |
| 11 | Elnora Dempsey | 21 | Daughter | Examiner | Maryland |
| 12 | Elizabeth Dempsey | 20 | Daughter | Seamstress | Maryland |
| 13 | John Dempsey THIS PERSON | 19 | Son | New Worker | Maryland |
| 14 | Margie Dempsey | 17 | Daughter | Packer | Maryland |
| 15 | Patricia Dempsey | 15 | Daughter | — | Maryland |
| 16 | Jerome Dempsey | 12 | Son | — | Maryland |
| 17 | Robert Dempsey | 11 | Son | — | Maryland |
| 18 | Charlotte Dempsey | 7 | Daughter | — | Maryland |
| 19 | George Hildebrand | 52 | Head | Machinist | Maryland |
| 20 | Lillian Hildebrand | 51 | Wife | — | Maryland |
| 21 | Neil Hildebrand | 15 | Son | — | Maryland |
| 22 | Catherine Zipperer | 86 | Mother-in-law | — | Maryland |
| 23 | William Everett | 46 | Head | Packer | Maryland |
| 24 | Margaret Everett | 48 | Wife | — | Maryland |
| 25 | Andrew Everett | 39 | Son | Laborer | Maryland |
| 26 | Margaret Everett | 17 | Daughter | Laborer | Maryland |
| 27 | Helen Holylawskury | 11 | Lodger | — | Maryland |
| 28 | Dewey Wolter | 40 | Head | Laborer | Maryland |
| 29 | Ada Wolter | 40 | Wife | — | Maryland |
| 30 | Nelson Wolter | 20 | Son | Laborer | Maryland |
| 31 | Winston Collier | 28 | Lodger | Roller | Maryland |
| 32 | Herbert Broughton | 32 | Head | Clerical | Maryland |
| 33 | Flora Broughton | 29 | Wife | — | Maryland |
| 34 | Arthur Morse | 57 | Head | Clerk | Maryland |
| 35 | Lucia Morse | 56 | Wife | — | Maryland |
| 36 | Eulalia Morse | 16 | Daughter | — | Maryland |
| 37 | Miriam Morse | 14 | Daughter | — | Maryland |
| 38 | Margaret Morse | 12 | Daughter | — | Maryland |
| 39 | Arthur Jr. Morse | 11 | Son | — | Maryland |
| 40 | Harry Schmilozyki | 42 | Head | Wiremill | Maryland |
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)