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James Dempsey — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this James Dempsey across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1924), then head of a 6-person household.
Age 16
b. ~1924
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Dempsey |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | H-1 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1924 |
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 |
|---|---|---|---|---|
| Gladyda Dempsey | Daughter | — | 10 | ~1930 |
| La Dempsey | Daughter | — | 14 | ~1926 |
| James Dempsey | Son | — | 16 | ~1924 |
| Thomas Dempsey | Head | — | 42 | ~1898 |
| Eleanor Dempsey | Daughter | — | 13 | ~1927 |
| Margaret Dempsey | Spouse | — | 37 | ~1903 |
Census Appearances
1930
Cook, Illinois
Son, age 5
Cook, Illinois · implied b. ~1925 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Dempsey |
| Given Name | Jack |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | New York |
| Mother's Birthplace | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 16
Cook-County, Illinois · implied b. ~1924 — 6 household members
| Surname | Dempsey |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Class of Worker | 0 |
| Highest Grade | H-1 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 16 · b. ~1924 · Illinois
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Sibling
Gladyda Dempsey
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eleanor Dempsey
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
La 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 — Cook-County, Illinois
Open full size
1940 US Federal Census — Cook-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00943-00433)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Jesse Steele | 62 | Head | Contractor | Illinois |
| 2 | Frank G. Kruckel | 59 | Head | Contractor | Illinois |
| 3 | Minnie Kruckel | 57 | Wife | — | Indiana |
| 4 | Otto Miller | 60 | Head | — | Illinois |
| 5 | Richard Rochester | 33 | Head | Secretary Treasurer | Illinois |
| 6 | Anna Rochester | 31 | Wife | — | Illinois |
| 7 | Richard Arnold Rochester | 8 | Son | — | Illinois |
| 8 | Thomas Dempsey | 42 | Head | Chauffeur | Illinois |
| 9 | Margaret Dempsey | 37 | Wife | — | Illinois |
| 10 | James Dempsey THIS PERSON | 16 | Son | — | Illinois |
| 11 | La Verne Dempsey | 14 | Daughter | — | Illinois |
| 12 | Eleanor Dempsey | 13 | Daughter | — | Illinois |
| 13 | Gladyda Dempsey | 10 | Daughter | — | Illinois |
| 14 | Phillip Roche | 43 | Head | Laborer | California |
| 15 | Martha Roche | 32 | Wife | — | Illinois |
| 16 | Phillip Roche | 10 | Son | — | Illinois |
| 17 | Abraham Meyler | 65 | Head | Salesman Candy Maker | Turkey |
| 18 | Ida L. Nolan | 62 | Lodger | — | Germany |
| 19 | Frank Annerino | 56 | Head | Fruit Dealer | Italy |
| 20 | Anna Annerino | 51 | Wife | — | Italy |
| 21 | Alfred Annerino | 30 | Son | Clerk | Illinois |
| 22 | Thomas Annerino | 27 | Son | Bookkeeper | Illinois |
| 23 | Mary Annerino | 20 | Daughter | — | Illinois |
| 24 | John Annerino | 18 | Son | Truck Driver | Illinois |
| 25 | Joseph Annerino | 15 | Son | — | Illinois |
| 26 | Augusta Annerino | 13 | Daughter | — | Illinois |
| 27 | Martha Castle | 46 | Head | Housemaid | Illinois |
| 28 | Arthur Sperry | 25 | Head | Gas Station Attendant | Illinois |
| 29 | Lydia Sperry | 22 | Wife | — | New York |
| 30 | Kathryn Sperry | 1 | Daughter | — | Illinois |
| 31 | Joseph Pirowski | 40 | Head | Iron Worker | Michigan |
| 32 | Edith Pirowski | 37 | Wife | — | Illinois |
| 33 | Joseph Pirowski | 16 | Son | — | Illinois |
| 34 | Dolores Pirowski | 13 | Daughter | — | Illinois |
| 35 | Robert Pirowski | 7 | Son | — | Illinois |
| 36 | John Crowley | 42 | Head | Coal Dealer | Illinois |
| 37 | Anne Crowley | 38 | Wife | — | Illinois |
| 38 | Charlotte Crowley | 4 | Daughter | — | Illinois |
| 39 | Agnes Wagner | 52 | Head | Janitress | Illinois |
| 40 | Theresa Wagner | 20 | Daughter | Nurse Maid | Illinois |
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)