JC
Joseph Carroll — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Joseph Carroll across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents James & Joseph — first a son (b.~1911), then head of a 3-person household.
Age 29
b. ~1911
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Carroll |
| Given Name | Joseph |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | assembly line |
| Industry | automobile manufacture |
| Class of Worker | PW |
| Hours Worked | 6 |
| Income (1939) | 1450 |
| Highest Grade | Hs 2 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Assembly Line |
| Township / Ward | Chicago |
| Est. Birth Year | ~1911 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Joseph | Age | Birth yr |
|---|---|---|---|---|
| Joseph Carroll | Son | — | 29 | ~1911 |
| Margaret Carroll | Head | — | 57 | ~1883 |
| Michael Carroll | Son | — | 28 | ~1912 |
Census Appearances
1920
Cook, Illinois
Son, age 7
Cook, Illinois · implied b. ~1913 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carroll |
| Given Name | Joseph |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Son, age 18
Cook, Illinois · implied b. ~1912 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carroll |
| Given Name | Joseph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | Clerk |
| Industry | Automobile |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 29
Cook-County, Illinois · implied b. ~1911 — 3 household members
| Surname | Carroll |
| Given Name | Joseph |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Occupation | assembly line |
| Industry | automobile manufacture |
| Class of Worker | PW |
| Hours Worked | 6 |
| Income (1939) | 1450 |
| Highest Grade | Hs 2 |
| 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 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father James Carroll (~0.92 confidence) and father Joseph Carroll (~0.92 confidence) and mother Margaret Carroll (~0.92 confidence) and mother Sarah Carroll (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
James Carroll
b. ~1889
Source father
● Household
· direct · ~0.92
Father
Joseph Carroll
b. ~1885
Source father
● Household
· direct · ~0.92
Mother
Margaret Carroll
b. ~1883
Source mother
● Household
· direct · ~0.92
Mother
Sarah Carroll
b. ~1893
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Joseph Carroll
Son · 1940 · age 29 · b. ~1911 · Illinois
★ You are viewing this record
Sibling
Michael Carroll
Sibling · 1940 · age 28
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
36 people indexed on this census page (nara:1940:m-t0627-00956-00448)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Rose Ciello | 24 | daughter | Assembler | Illinois |
| 2 | Daniel Ciello | 21 | son | Mechanic | Illinois |
| 3 | Angelo Ciello | 14 | son | — | Illinois |
| 4 | Michael Ciello | 12 | son | — | Illinois |
| 5 | Arthur Fragness | 34 | head | Restaurant Proprietor | Illinois |
| 6 | Bessie Fragness | 28 | wife | — | New York |
| 7 | Arthur Jr. Fragness | 2 | son | — | Illinois |
| 8 | Frank Vronis | 37 | head | Carpenter | Germany |
| 9 | Alfreda Vronis | 35 | wife | — | Germany |
| 10 | Frank Jr. Vronis | 8 | son | — | Illinois |
| 11 | Bessie Lenon | 46 | head | — | Illinois |
| 12 | Thomas Mullin | 32 | lodger | Dairy Employee | New York |
| 13 | Chris Gennery | 40 | lodger | Chauffeur | Irish Free State |
| 14 | John O'Malley | 39 | lodger | Bartender | Ireland |
| 15 | Patrick Bryant | 44 | lodger | Laborer | Irish Free State |
| 17 | John Callas | 30 | head | Fresh Fruit Salesman | Illinois |
| 18 | Gertrude Callas | 27 | wife | — | Illinois |
| 19 | John Callas | 6 | son | — | Illinois |
| 20 | Charles Callas | 2 | son | — | Illinois |
| 21 | Anna J. Ready | 64 | head | — | New York |
| 22 | Lillian Malone | 58 | sister | — | New York |
| 24 | Peter Mc Cullen | 37 | head | Market Foreman | Illinois |
| 25 | Mary Mc Cullen | 33 | wife | — | Illinois |
| 26 | Joan Mc Cullen | 6 | daughter | — | Illinois |
| 27 | Glenn Lehr | 26 | head | Operator Sewing Machine | Nebraska |
| 28 | Dorothy Lehr | 25 | wife | — | Illinois |
| 29 | Catherine Mills | 51 | aunt | House Work | Illinois |
| 30 | Florence Kruck | 27 | head | Cake Wrapper | Illinois |
| 31 | Louis Kruck | 8 | son | — | Illinois |
| 32 | Elizabeth Walsh | 53 | head | — | Irish Free State |
| 33 | Eileen Walsh | 29 | daughter | Housework | Irish Free State |
| 34 | Julia Walsh | 26 | daughter | Clerk | Irish Free State |
| 35 | Maureen Walsh | 16 | daughter | — | Irish Free State |
| 36 | Margaret Carroll | 57 | head | — | Illinois |
| 37 | Joseph Carroll THIS PERSON | 29 | son | Assembly Line | Illinois |
| 38 | Michael Carroll | 28 | son | Telegraph Operator | Illinois |
Pedigree Summary
Joseph + 1 sibling
Gen 1 · 4 parents
~0.92
Max depth 4 (1900–1950 window)
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)