JC
John Casey — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this John Casey across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Daniel & Nora — first a head (b.~1905), then head of a 7-person household.
Age 35
b. ~1905
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Casey |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Policeman |
| Industry | City of Chicago |
| Class of Worker | GW |
| Hours Worked | 48 |
| Income (1939) | 2500 |
| Highest Grade | H 2 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Policeman |
| Township / Ward | Chicago |
| Est. Birth Year | ~1905 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Dolores Casey | Daughter | — | 10 | ~1930 |
| Margaret Casey | Daughter | — | 3 | ~1937 |
| Patricia Casey | Daughter | — | 7 | ~1933 |
| Geraldine Casey | Daughter | — | 1 | ~1939 |
| John Casey | Head | — | 35 | ~1905 |
| John Casey | Son | — | 4 | ~1936 |
| Helen Casey | Spouse | — | 30 | ~1910 |
Census Appearances
1920
Cook, Illinois
Son, age 16
Cook, Illinois · implied b. ~1904 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Casey |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Clerk |
| Industry | Mail Order Co. |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Son, age 27
Cook, Illinois · implied b. ~1903 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Casey |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Illinois |
| Age at First Marriage | 27 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Electrician |
| Industry | Edison |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Head, age 35
Cook-County, Illinois · implied b. ~1905 — 7 household members
| Surname | Casey |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Occupation | Policeman |
| Industry | City of Chicago |
| Class of Worker | GW |
| Hours Worked | 48 |
| Income (1939) | 2500 |
| Highest Grade | H 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 John Casey across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Daniel Casey (~0.92 confidence) and mother Nora Casey (~0.92 confidence) and father John Casey (~0.92 confidence) and mother Mary Casey (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Daniel Casey
b. ~1867
Source father
● Household
· direct · ~0.92
Mother
Nora Casey
b. ~1870
Source mother
● Household
· direct · ~0.92
Father
John Casey
b. ~1871
Source father
● Household
· direct · ~0.92
Mother
Mary Casey
b. ~1875
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Casey
Head · 1940 · age 35 · b. ~1905 · Illinois
★ You are viewing this record
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-t0627-00957-00800)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Henry Adams | 45 | Head | Accountant | Illinois |
| 42 | Marie Adams | 44 | Wife | — | Illinois |
| 43 | Donald Adams | 17 | Son | — | Illinois |
| 44 | Thomas Kielty | 35 | Head | Laborer | Ireland |
| 45 | Bridie Kielty | 30 | Wife | — | Ireland |
| 46 | Martin Kielty | 1 | Son | — | Illinois |
| 47 | George Rosell | 42 | Head | Manager | Illinois |
| 48 | Olga Rosell | 41 | Wife | — | Sweden |
| 49 | Inge Rosell | 14 | Daughter | — | Illinois |
| 50 | Debra Rosell | 12 | Daughter | — | Illinois |
| 51 | Timothy Hastings | 61 | Head | Clerk | Ireland |
| 52 | Margaret Hastings | 59 | Wife | — | Illinois |
| 53 | Mary Hastings | 23 | Daughter | Continuometer | Illinois |
| 54 | Arthur Engberg | 53 | Head | Machinist | Michigan |
| 55 | Anna Engberg | 42 | Wife | — | Sweden |
| 56 | Rudolph Engberg | 22 | Son | Bus Boy | Illinois |
| 57 | Jean Engberg | 19 | Daughter | Office Clerk | Minnesota |
| 58 | Leonard Engberg | 14 | Son | — | Illinois |
| 59 | Richard Engberg | 6 | Son | — | Illinois |
| 60 | Carl Danielson | 60 | Head | Carpenter | Sweden |
| 61 | Elva Danielson | 48 | Wife | — | Sweden |
| 62 | Carl Ivan Danielson | 23 | Son | Stockroom Boy | Illinois |
| 63 | Violet Danielson | 20 | Daughter | Book Keeper | Illinois |
| 64 | John Casey THIS PERSON | 35 | Head | Policeman | Illinois |
| 65 | Helen Casey | 30 | Wife | — | Illinois |
| 66 | Dolores Casey | 10 | Daughter | — | Illinois |
| 67 | Patricia Casey | 7 | Daughter | — | Illinois |
| 68 | John Jr Casey | 4 | Son | — | Illinois |
| 69 | Margaret Casey | 3 | Daughter | — | Illinois |
| 70 | Geraldine Casey | 1 | Daughter | — | Illinois |
| 71 | Melville Haggerty | 42 | Head | Clerk | Illinois |
| 72 | Ladonna Haggerty | 33 | Sister | — | Illinois |
| 73 | Matthew Mcgrath | 40 | Lodger | — | Illinois |
| 74 | Rose Mcgrath | 49 | Lodger | — | Illinois |
| 75 | Jack Barrow | 23 | Son | Laborer | Illinois |
| 76 | George Barrow | 55 | Lodger | Truck Driver | Ohio |
| 77 | Catherine Lynch | 36 | Head | Clerk | Illinois |
| 78 | Paul Schutz | 33 | Head | Driver | Illinois |
| 79 | Margaret Schutz | 33 | Wife | — | Illinois |
| 80 | Marilyn Schutz | 9 | Daughter | — | Illinois |
Pedigree Summary
John
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)