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John Cassidy — 1920 US Census Record
Linked across censuses1920 United States Federal Census · Cook, Illinois
Our Model Tree links this John Cassidy across the 1920, 1930 and 1940 US Censuses in Cook, Illinois (XGBoost, ~Confirmed) — first a head (b.~1870), then head of a 10-person household.
Age 50
b. ~1870
Male
Head
Born: Illinois
Married
1920 Census Record Details
| Census Year | 1920 |
| Location | Cook, Illinois |
| Surname | Cassidy |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Illinois |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Additional Details | |
| Occupation | Foreman |
| Industry | Railroad |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Foreman |
| Township / Ward | City Of Chicago |
| Est. Birth Year | ~1870 |
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.
10 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Lillian Cassidy | Daughter | — | 15 | ~1905 |
| Alice Cassidy | Daughter | — | 17 | ~1903 |
| John Cassidy | Head | — | 50 | ~1870 |
| Thomas Henry | Other | — | 35 | ~1885 |
| Ella Markwart | Other | — | 24 | ~1896 |
| Herbert Cassidy | Son | — | 22 | ~1898 |
| John Cassidy | Son | — | 25 | ~1895 |
| Edward Cassidy | Son | — | 20 | ~1900 |
| Charles Cassidy | Son | — | 12 | ~1908 |
| Alice Cassidy | Spouse | — | 45 | ~1875 |
Census Appearances
1920
Cook, Illinois
Head, age 50
Cook, Illinois · implied b. ~1870 — 10 household members
| Surname | Cassidy |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Illinois |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Foreman |
| Industry | Railroad |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Other, age 62
Cook, Illinois · implied b. ~1868 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cassidy |
| Given Name | John |
| Relationship to Head | Lodger |
| Sex | M |
| Color / Race | White |
| Age | 62 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 7X94 |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Occupation | Clerical work |
| Industry | Bureau of Mines |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Value / Rent | No |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Other, age 71
Cook-County, Illinois · implied b. ~1869 — 40 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cassidy |
| Given Name | John |
| Relationship to Head | Inmate |
| Sex | M |
| Color / Race | White |
| Age | 71 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Norwood Park |
| Occupation | INST |
| Industry | 0 |
| Highest Grade | No 8 |
| 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 Cassidy 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 Cassidy
Head · 1920 · age 50 · b. ~1870 · Illinois
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1920 US Federal Census — Cook, Illinois
Open full size
1920 US Federal Census — Cook, Illinois
Page Contents
49 people indexed on this census page (ia:1920:14thcensusofpopu324unit:0408)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Samuel Lamb | 24 | Lodger | Teamster | Denmark |
| 2 | Elizabeth Rafferty | 55 | Head | — | Ireland |
| 3 | Mary Rafferty | 30 | Daughter | Secretary | Illinois |
| 4 | Elizabeth Rafferty | 29 | Daughter | Secretary | Illinois |
| 5 | John Rafferty | 26 | Son | Clerk | Illinois |
| 6 | Edward Rafferty | 25 | Son | Asst Manager | Illinois |
| 7 | Richard Rafferty | 23 | Son | Gas Maker | Illinois |
| 8 | Patrick Rafferty | 21 | Son | Steam Fitter | Illinois |
| 9 | Thomas Rafferty | 20 | Son | Fireman | Illinois |
| 10 | Catherine Rafferty | 15 | Daughter | — | Illinois |
| 11 | David Regan | 55 | Head | Motorman | Ireland |
| 12 | Alice Regan | 55 | Wife | — | Ireland |
| 13 | Mary Regan | 22 | Daughter | Secretary | Illinois |
| 14 | John Regan | 21 | Son | Electrician | Illinois |
| 15 | Joseph Regan | 18 | Son | Apprentice | Illinois |
| 16 | Alice Regan | 16 | Daughter | Cashier | Illinois |
| 17 | Nellie Regan | 14 | Daughter | — | Illinois |
| 18 | David Regan | 12 | Son | — | Illinois |
| 19 | William Regan | 10 | Son | — | Illinois |
| 20 | James Regan | 8 | Son | — | Illinois |
| 21 | Francis Regan | 6 | Son | — | Illinois |
| 22 | John E Powers | 45 | Head | Contractor | Illinois |
| 23 | Elizabeth Powers | 42 | Wife | — | Illinois |
| 24 | William Powers | 21 | Son | — | Illinois |
| 25 | Mary D Powers | 20 | Daughter | — | Illinois |
| 26 | Helen Powers | 18 | Daughter | Clerk | Illinois |
| 27 | Patrick Donahue | 45 | Lodger | Driver | Ireland |
| 28 | James Donahue | 40 | Lodger | Foreman | Ireland |
| 29 | Peter Mccormick | 45 | Lodger | Driver | Ireland |
| 30 | John Cassidy THIS PERSON | 50 | Head | Foreman | Illinois |
| 31 | Alice Cassidy | 45 | Wife | — | Illinois |
| 32 | John Cassidy | 25 | Son | Clerk | Illinois |
| 33 | Herbert Cassidy | 22 | Son | Fireman | Illinois |
| 34 | Edward Cassidy | 20 | Son | Clerk | Illinois |
| 35 | Alice Cassidy | 17 | Daughter | — | Illinois |
| 36 | Lillian Cassidy | 15 | Daughter | — | Illinois |
| 37 | Charles Cassidy | 12 | Son | — | Illinois |
| 38 | Thomas Henry | 35 | Lodger | — | New York |
| 39 | Ella Markwart | 24 | Lodger | Salesman | New York |
| 40 | Gilbert Leonard | 59 | Head | Salesman | Illinois |
| 41 | Katherine Leonard | 45 | Wife | Commercial Trav | Illinois |
| 42 | A F Leonard | 22 | Son | — | Illinois |
| 43 | H B Leonard | 20 | Son | Chemist | Illinois |
| 44 | G J Leonard | 13 | Son | Page | Illinois |
| 45 | A J Newman | 45 | Head | — | Indiana |
| 46 | Blanche Newman | 40 | Wife | Commercial Traveler | New York |
| 47 | Ralph Kirby | 31 | Brother-in-law | — | Illinois |
| 48 | Sadie Kirby | 28 | Sister-in-law | Linotype | New York |
| 49 | Mary Newman | 57 | Mother-in-law | — | Illinois |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1920 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)