JC
Joseph Carroll — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Joseph Carroll across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1925), then head of a 8-person household.
Age 15
b. ~1925
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Carroll |
| Given Name | Joseph E. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Hours Worked | 0 |
| Income (1939) | 0 |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1925 |
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 Joseph | Age | Birth yr |
|---|---|---|---|---|
| Mary Carroll | Daughter | — | 8 | ~1932 |
| William Carroll | Son | — | 3 | ~1937 |
| Estelle Carroll | Spouse | — | 34 | ~1906 |
| John Carroll | Head | — | 41 | ~1899 |
| John Carroll | Son | — | 19 | ~1921 |
| Robert Carroll | Son | — | 15 | ~1925 |
| Joseph Carroll | Son | — | 15 | ~1925 |
| Kathryn Carroll | Daughter | — | 17 | ~1923 |
Census Appearances
1930
Cook, Illinois
Son, age 4
Cook, Illinois · implied b. ~1926 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carroll |
| Given Name | Joseph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 15
Cook-County, Illinois · implied b. ~1925 — 8 household members
| Surname | Carroll |
| Given Name | Joseph E. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Hours Worked | 0 |
| Income (1939) | 0 |
| Highest Grade | No 6 |
| 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 Joseph Carroll across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Joseph Carroll
Son · 1940 · age 15 · b. ~1925 · Illinois
★ You are viewing this record
Sibling
Kathryn Carroll
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Carroll
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Carroll
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Carroll
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Carroll
Sibling · 1940 · age 8
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-t0627-00953-00047)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Bridget Murphy | 33 | Wife | — | Northern Ireland |
| 2 | Alfred Schneider | 32 | Head | Clerk | Illinois |
| 3 | Dorothy H. Schneider | 27 | Wife | Saleslady | Illinois |
| 4 | John Tritton | 74 | Head | — | Iowa |
| 5 | Ella May Tritton | 70 | Wife | — | Canada English |
| 6 | Effie Tritton | 55 | Daughter | — | Illinois |
| 7 | Arthur J. Jr. Tritton | 23 | Grandson | Mail Office Clerk | Illinois |
| 8 | Earl C. Tritton | 20 | Grandson | Mail Office Clerk | Illinois |
| 9 | Herman J. Grosskreutz | 47 | Head | Watchman | Illinois |
| 10 | Caroline K. Grosskreutz | 56 | Sister | — | Illinois |
| 11 | Dorothy L. Hubbell | 9 | Niece | — | Illinois |
| 12 | Gloria V. Hubbell | 9 | Niece | — | Illinois |
| 13 | John E. Carroll | 41 | Head | Milkman | Illinois |
| 14 | Estelle V. Carroll | 34 | Wife | — | Illinois |
| 15 | John H. Carroll | 19 | Son | Soda Clerk | Illinois |
| 16 | Kathryn M. Carroll | 17 | Daughter | — | Illinois |
| 17 | Robert E. Carroll | 15 | Son | — | Illinois |
| 18 | Joseph E. Carroll THIS PERSON | 15 | Son | — | Illinois |
| 19 | Mary T. Carroll | 8 | Daughter | — | Illinois |
| 20 | William B. Carroll | 3 | Son | — | Illinois |
| 21 | Elizabeth C. Thorne | 76 | Head | — | England |
| 22 | Una Thorne | 50 | Daughter | Stenographer | England |
| 23 | Christian Schmidt | 47 | Head | Electrician | Illinois |
| 24 | Hazel T. Schmidt | 47 | Wife | — | Illinois |
| 25 | Robert C. Schmidt | 14 | Son | — | Illinois |
| 26 | John M. Costner | 35 | Head | Order Picker | Tennessee |
| 27 | Frances T. Costner | 31 | Wife | — | Illinois |
| 28 | Robert N. Costner | 9 | Son | — | Illinois |
| 29 | Donald E. Costner | 6 | Son | — | Illinois |
| 30 | Carl O. Nicholson | 62 | Father-in-law | — | Illinois |
| 31 | Anna L. Nicholson | 59 | Mother-in-law | Housework | Illinois |
| 32 | Rose Hanna | 74 | Head | — | Illinois |
| 33 | William Garrick | 57 | Head | Riveter | Scotland |
| 34 | Georgina S. Garrick | 52 | Wife | — | Northern Ireland |
| 35 | William Murray | 11 | Boarder | — | Illinois |
| 36 | Stephen S. Lehman | 61 | Head | Box Maker | Germany |
| 37 | Gertrude Lehman | 58 | Wife | — | Illinois |
| 38 | Agnes L. Lehman | 28 | Daughter | Telephone Supervisor | Illinois |
| 39 | Marie E. Lehman | 21 | Daughter | Telephone Operator | Illinois |
| 40 | Dolores M. Lehman | 18 | Daughter | New Worker | 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)