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Jack Jones — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Jack Jones across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1926), then head of a 8-person household.
Age 14
b. ~1926
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Jones |
| Given Name | Jack |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago |
| Est. Birth Year | ~1926 |
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 Jack | Age | Birth yr |
|---|---|---|---|---|
| Loretta Jones | Daughter | — | 23 | ~1917 |
| Margaret Jones | Daughter | — | 27 | ~1913 |
| Jean Jones | Daughter | — | 12 | ~1928 |
| Melvin Jones | Head | — | 49 | ~1891 |
| Melvin Jones | Son | — | 20 | ~1920 |
| Jack Jones | Son | — | 14 | ~1926 |
| William Jones | Son | — | 7 | ~1933 |
| Alice Jones | Spouse | — | 46 | ~1894 |
Census Appearances
1930
Cook, Illinois
Son, age 4
Cook, Illinois · implied b. ~1926 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jones |
| Given Name | Jack |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Russia |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 14
Cook-County, Illinois · implied b. ~1926 — 8 household members
| Surname | Jones |
| Given Name | Jack |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Highest Grade | 8 |
| 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 Jack Jones across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Jack Jones
Son · 1940 · age 14 · b. ~1926 · Illinois
★ You are viewing this record
Sibling
Loretta Jones
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Jones
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Melvin Jones
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jean Jones
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Jones
Sibling · 1940 · age 27
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-t0627-00994-00627)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Charles Mitchell | 40 | Lodger | Laborer | Eire |
| 2 | Melvin Gustafson | 35 | Head | Buyer | Illinois |
| 3 | Ruth Gustafson | 27 | Wife | — | Illinois |
| 4 | Paul Gustafson | 4 | Son | — | Illinois |
| 5 | Gunnar Gustafson | 37 | Head | Clerical | Illinois |
| 6 | Nora Gustafson | 33 | Wife | — | Norway |
| 7 | Eleanor Gustafson | 3 | Daughter | — | Illinois |
| 8 | Roger Gustafson | 0 | Son | — | Illinois |
| 9 | Magnus K. Heine | 33 | Head | Teacher | Indiana |
| 10 | Harriet Heine | 30 | Wife | — | Indiana |
| 11 | Magnus K. Jr. Heine | 4 | Son | — | New York |
| 12 | Judith Heine | 2 | Daughter | — | Illinois |
| 13 | Gustav Carlson | 59 | Head | Printer | Minnesota |
| 14 | Caroline Carlson | 49 | Wife | — | Illinois |
| 15 | George F. Blond | 59 | Head | Manager | New York |
| 16 | Fanny Blond | 59 | Wife | — | Germany |
| 17 | Paul Engh | 48 | Head | Bricklayer | Illinois |
| 18 | Lillian Engh | 46 | Wife | Saleslady | Illinois |
| 19 | Stella Thompson | 32 | Niece | Typist | Illinois |
| 20 | Harry Wiersma | 46 | Head | Salesman | Illinois |
| 21 | Clara Wiersma | 45 | Wife | — | Illinois |
| 22 | Harry Wiersma | 24 | Son | Bank Clerk | Illinois |
| 23 | Richard Wiersma | 21 | Son | Accountant | Illinois |
| 24 | June Wiersma | 16 | Daughter | Stenographer | Illinois |
| 25 | Doris Wiersma | 16 | Daughter | — | Illinois |
| 26 | Robert Wiersma | 8 | Son | — | Illinois |
| 27 | Peter Johnson | 47 | Head | Truck Driver | Illinois |
| 28 | Augusta Johnson | 44 | Wife | — | Michigan |
| 29 | Mary R. Johnson | 7 | Daughter | — | Illinois |
| 30 | Melvin Jones | 49 | Head | Trucking | Pennsylvania |
| 31 | Alice Jones | 46 | Wife | — | Illinois |
| 32 | Margaret Jones | 27 | Daughter | Saleslady | Illinois |
| 33 | Loretta Jones | 23 | Daughter | Saleslady | Illinois |
| 34 | Melvin Jr. Jones | 20 | Son | Truck Driver | Illinois |
| 35 | Jack Jones THIS PERSON | 14 | Son | — | Illinois |
| 36 | Jean M. Jones | 12 | Daughter | — | Illinois |
| 37 | William Jones | 7 | Son | — | Illinois |
| 38 | Edmund Schroeder | 45 | Head | Pressman | Illinois |
| 39 | Florence Schroeder | 43 | Wife | Dressmaker | Illinois |
| 40 | Clifford Schroeder | 16 | Son | — | 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)