JD
James Dempsey — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Hudson-County, New Jersey
Our Model Tree links this James Dempsey across the 1930 and 1940 US Censuses in Hudson-County, New Jersey (XGBoost, ~Confirmed) — first a son (b.~1927), then head of a 6-person household.
Age 13
b. ~1927
Male
Son
Born: New Jersey
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Hudson-County, New Jersey |
| Surname | Dempsey |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Jersey City |
| 1935 Residence (County) | Hudson |
| Additional Details | |
| Highest Grade | Hs 4 |
| 1935 Residence | Same house |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Township / Ward | Jersey City |
| Est. Birth Year | ~1927 |
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 James | Age | Birth yr |
|---|---|---|---|---|
| James Dempsey | Son | — | 13 | ~1927 |
| Thomas Dempsey | Son | — | 5 | ~1935 |
| Mary Dempsey | Daughter | — | 15 | ~1925 |
| Alice Dempsey | Spouse | — | 35 | ~1905 |
| John Dempsey | Son | — | 10 | ~1930 |
| Patrick Dempsey | Head | — | 45 | ~1895 |
Census Appearances
1930
Hudson, New …
Son, age 3
Hudson, New Jersey · implied b. ~1927 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Dempsey |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | Ireland Free State |
| Mother's Birthplace | St Louis |
| Can Read/Write | No |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Hudson-County, New …
Son, age 13
Hudson-County, New Jersey · implied b. ~1927 — 6 household members
| Surname | Dempsey |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Jersey City |
| 1935 Residence (County) | Hudson |
| Highest Grade | Hs 4 |
| 1935 Residence | Same house |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
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 13 · b. ~1927 · New Jersey
★ You are viewing this record
Sibling
Mary Dempsey
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Dempsey
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Dempsey
Sibling · 1940 · age 10
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 — Hudson-County, New Jersey
Open full size
1940 US Federal Census — Hudson-County, New Jersey
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02401-00348)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Freda Mcgreery | 49 | Head | Charwoman | New Jersey |
| 42 | Harold Mcgreery | 21 | Son | New Worker | New Jersey |
| 43 | Joseph Mcgreery | 19 | Son | Laborer | New Jersey |
| 44 | James Mcgreery | 17 | Son | Packer | New Jersey |
| 45 | Edward Mcgreery | 15 | Son | — | New Jersey |
| 46 | Anna Mcgreery | 12 | Daughter | — | New Jersey |
| 47 | Mary Fitzgerald | 28 | Daughter | Machine Operator | New Jersey |
| 48 | Rose Fitzgerald | 7 | Granddaughter | — | New Jersey |
| 49 | Patrick Dempsey | 45 | Head | Platformer | Ireland |
| 50 | Alice Dempsey | 35 | Wife | — | Missouri |
| 51 | Mary Dempsey | 15 | Daughter | — | New Jersey |
| 52 | James Dempsey THIS PERSON | 13 | Son | — | New Jersey |
| 53 | John Dempsey | 10 | Son | — | New Jersey |
| 54 | Thomas Dempsey | 5 | Son | — | New Jersey |
| 55 | Frank Lancia | 42 | Head | Watch Repairer | Italy |
| 56 | Mary Lancia | 30 | Wife | — | Italy |
| 57 | Cosmo Lancia | 10 | Son | — | New Jersey |
| 58 | John Lancia | 5 | Son | — | New Jersey |
| 59 | Arthur O'Donnell | 43 | Head | Laborer | Ireland |
| 60 | Bridget O'Donnell | 42 | Wife | — | Ireland |
| 61 | Francis O'Donnell | 17 | Son | Messenger | New Jersey |
| 62 | John O'Donnell | 10 | Son | — | New Jersey |
| 63 | Thomas O'Donnell | 8 | Son | — | New Jersey |
| 64 | Robert O'Donnell | 5 | Son | — | New Jersey |
| 65 | Anna Devita | 48 | Head | Cook | New York |
| 66 | Margaret Mungovan | 23 | Head | New Worker | New Jersey |
| 67 | Delia Whalen | 45 | Head | Kitchen Worker | Ireland |
| 68 | John Whalen | 21 | Son | Laborer | New Jersey |
| 69 | Thomas Whalen | 19 | Son | Salesman | New Jersey |
| 70 | Joseph Whalen | 16 | Son | — | New Jersey |
| 71 | William Daum | 35 | Head | Laborer | New Jersey |
| 72 | Elizabeth Daum | 35 | Wife | — | New Jersey |
| 73 | Ruth Daum | 15 | Daughter | — | New Jersey |
| 74 | Doris Daum | 10 | Daughter | — | New Jersey |
| 75 | Patricia Daum | 8 | Daughter | — | New Jersey |
| 76 | Janet Daum | 7 | Daughter | — | New Jersey |
| 77 | Geraldine Daum | 4 | Daughter | — | New Jersey |
| 78 | William Jr Daum | 2 | Son | — | New Jersey |
| 79 | Charles Bligh | 44 | Head | Machinist | New Jersey |
| 80 | Evelyn Bligh | 39 | Wife | — | New Jersey |
Related Census Records
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)