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John Casey — 1940 US Census Record
Linked across censuses1940 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) — first a head (b.~1897), then head of a 8-person household.
Age 43
b. ~1897
Male
Head
Born: Ireland
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 | 43 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | CHICAGO-CITY |
| 1935 Residence (County) | COOK |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Policeman |
| Industry | City Police Department |
| Class of Worker | GW |
| Hours Worked | 60 |
| Income (1939) | 2400 |
| Highest Grade | 3 |
| 1935 Residence | Same place |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Occupation | Policeman |
| Township / Ward | Chicagocity |
| Est. Birth Year | ~1897 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Cathleen Casey | Daughter | — | 8 | ~1932 |
| Mary Casey | Daughter | — | 19 | ~1921 |
| Peggy Casey | Daughter | — | 10 | ~1930 |
| John Casey | Head | — | 43 | ~1897 |
| Cornelius Casey | Son | — | 17 | ~1923 |
| John Casey | Son | — | 15 | ~1925 |
| Danny Casey | Son | — | 4 | ~1936 |
| Mary Casey | Spouse | — | 42 | ~1898 |
Census Appearances
1920
Cook, Illinois
Other, age 24
Cook, Illinois · implied b. ~1896 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Casey |
| Given Name | John |
| Relationship to Head | Boarder |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Ireland |
| Year of Immigration | 1917 |
| Naturalization Status | Alien |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Locomotive Fireman |
| Industry | Railroad |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth Country | Ireland |
| Year of Naturalization | 1919 |
| Birthplace (normalized) | ireland |
1930
Cook, Illinois
Head, age 35
Cook, Illinois · implied b. ~1895 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Casey |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Ireland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1914 |
| Age at First Marriage | 25 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Policeman |
| Industry | City |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | R |
| Home Value / Rent | 55 |
| Radio Set | R |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1940
Cook-County, Illinois
Head, age 43
Cook-County, Illinois · implied b. ~1897 — 8 household members
| Surname | Casey |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 43 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | CHICAGO-CITY |
| 1935 Residence (County) | COOK |
| Naturalization Status | Naturalized |
| Occupation | Policeman |
| Industry | City Police Department |
| Class of Worker | GW |
| Hours Worked | 60 |
| Income (1939) | 2400 |
| Highest Grade | 3 |
| 1935 Residence | Same place |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
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.
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This person
Anchor record
John Casey
Head · 1940 · age 43 · b. ~1897 · Illinois
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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
39 people indexed on this census page (nara:1940:m-t0627-00999-00454)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Eunice Colling | 25 | Daughter | — | Wisconsin |
| 42 | John Beaty | 21 | Lodger | Laborer | Wisconsin |
| 43 | Oscar Bergman | 55 | Lodger | Trucker | Illinois |
| 44 | Sydney Doe | 28 | Lodger | Proprietor | Illinois |
| 45 | Carl Ohlgren | 55 | Head | Asst. Master | Sweden |
| 46 | Hilda Ohlgren | 54 | Wife | — | Sweden |
| 47 | Warren Ohlgren | 14 | Son | Photography Assistant | Illinois |
| 48 | Resa Hiank | 43 | Head | Painter | Hungary |
| 49 | Rose Hiank | 40 | Wife | — | Hungary |
| 50 | Galmela Hiank | 15 | Daughter | — | Illinois |
| 51 | Frank Hiank | 14 | Son | — | Illinois |
| 52 | Albert Hiank | 9 | Son | — | Illinois |
| 53 | Sam Bronar | 47 | Head | Photographer | Germany |
| 54 | Elizabeth Bronar | 46 | Wife | Finisher | Germany |
| 55 | John Bronar | 12 | Son | — | Illinois |
| 56 | John Casey THIS PERSON | 43 | Head | Policeman | Ireland |
| 57 | Mary Casey | 42 | Wife | — | Ireland |
| 58 | Mary Casey | 19 | Daughter | Dress Saleslady | Illinois |
| 59 | Cornelius Casey | 17 | Son | — | Illinois |
| 60 | John Casey | 15 | Son | — | Illinois |
| 61 | Peggy Casey | 10 | Daughter | — | Illinois |
| 62 | Cathleen Casey | 8 | Daughter | — | Illinois |
| 63 | Danny Casey | 4 | Son | — | Illinois |
| 64 | Arthur S. Benson | 40 | Head | Clerk | Illinois |
| 65 | Elsie R. Benson | 32 | Wife | — | Illinois |
| 66 | Faynal Dengraf | 41 | Head | Drill Press Machinist | Illinois |
| 67 | Catherine Dengraf | 37 | Wife | — | Illinois |
| 68 | Edward Logan | 32 | Head | Auditor | Michigan |
| 69 | Stella Logan | 30 | Wife | — | Illinois |
| 70 | Patricia Logan | 4 | Daughter | — | Illinois |
| 72 | Angela Mleczek | 40 | Head | — | Illinois |
| 73 | Robert Mleczek | 18 | Son | Draftsman | Illinois |
| 74 | Gertrude Mleczek | 16 | Daughter | — | Illinois |
| 75 | Lorraine Mleczek | 11 | Daughter | — | Illinois |
| 76 | Edward Mleczek | 8 | Son | — | Illinois |
| 77 | Frank Brinke | 56 | Head | Foreman | Michigan |
| 78 | Catherine Brinke | 55 | Wife | — | Illinois |
| 79 | Norman Brinke | 23 | Son | File Clerk | Illinois |
| 80 | Ray Job | 50 | Head | Truck Driver | 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)