JD
James Dempsey — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Kings-County, New York
Our Model Tree links this James Dempsey across the 1930 and 1940 US Censuses in Kings-County, New York (XGBoost, ~Confirmed) — first a son (b.~1922), then head of a 8-person household.
Age 18
b. ~1922
Male
Son
Born: New York
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Kings-County, New York |
| Surname | Dempsey |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | Brooklyn |
| 1935 Residence (County) | Kings |
| Additional Details | |
| Occupation | School |
| Highest Grade | H 3 |
| 1935 Residence | Same place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
| Occupation | School |
| Township / Ward | Brooklyn |
| Est. Birth Year | ~1922 |
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 James | Age | Birth yr |
|---|---|---|---|---|
| Lawrence Dempsey | Head | — | 58 | ~1882 |
| James Dempsey | Son | — | 18 | ~1922 |
| Catherine Dempsey | Spouse | — | 56 | ~1884 |
| Anna Miller | Other | — | 58 | ~1882 |
| Alfred Dempsey | Son | — | 14 | ~1926 |
| Dorothy Olsen | Daughter | — | 21 | ~1919 |
| Mary Dempsey | Daughter | — | 16 | ~1924 |
| Lawrence Dempsey | Son | — | 20 | ~1920 |
Census Appearances
1930
Kings, New …
Son, age 9
Kings, New York · implied b. ~1921 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Dempsey |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | New York |
| Mother's Birthplace | Holland |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1940
Kings-County, New …
Son, age 18
Kings-County, New York · implied b. ~1922 — 8 household members
| Surname | Dempsey |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | Brooklyn |
| 1935 Residence (County) | Kings |
| Occupation | School |
| Highest Grade | H 3 |
| 1935 Residence | Same place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
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 James Dempsey across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
James Dempsey
Son · 1940 · age 18 · b. ~1922 · New York
★ You are viewing this record
Sibling
Dorothy Olsen
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alfred Dempsey
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lawrence Dempsey
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Dempsey
Sibling · 1940 · age 16
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 — Kings-County, New York
Open full size
1940 US Federal Census — Kings-County, New York
Page Contents
27 people indexed on this census page (nara:1940:m-t0627-02573-00488)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Louise Schwarz | 42 | Wife | Home | Germany |
| 42 | Gerald Schwarz | 15 | Son | School | New York |
| 43 | Robert Schwarz | 5 | Son | School | New York |
| 44 | Lawrence Dempsey | 58 | Head | Driver | New York |
| 45 | Catherine Dempsey | 56 | Wife | Salesgirl | New York |
| 46 | Anna Miller | 58 | Mother | Home | Ireland |
| 47 | Dorothy Olsen | 21 | Daughter | Clerical Unit | New York |
| 48 | Lawrence Jr. Dempsey | 20 | Son | Clerical Work | New York |
| 49 | James Dempsey THIS PERSON | 18 | Son | School | New York |
| 50 | Mary Dempsey | 16 | Daughter | School | New York |
| 51 | Alfred Dempsey | 14 | Son | School | New York |
| 52 | Burt Cooper | 40 | Head | Unemployed | New York |
| 53 | Dorothy Cooper | 35 | Wife | Home | New York |
| 54 | William Cooper | 19 | Son | Operator | New York |
| 55 | Bertram Cooper | 18 | Son | Unemployed | New York |
| 56 | Anna Cooper | 14 | Daughter | School | New York |
| 57 | Norman Cooper | 8 | Son | School | New York |
| 58 | Joseph Cooper | 5 | Son | Home | New York |
| 59 | Josephine Cruickshank | 61 | Head | Home | England |
| 60 | Arthur Cruickshank | 24 | Son | Lab Worker | Massachusetts |
| 61 | Lillian Erickson | 27 | Daughter | Home | Massachusetts |
| 62 | Josephine Brown | 29 | Daughter | Home | Massachusetts |
| 63 | Kenneth Cruickshank | 31 | Son | Home | Massachusetts |
| 64 | Joseph Martin | 36 | Head | Printer Asst. | New York |
| 65 | Mary Martin | 43 | Wife | Operator | New York |
| 66 | Vincent Martin | 33 | Son | Unemployed | New York |
| 67 | Annie Martin | 70 | Mother | Home | Ireland |
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)