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John Reilly — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this John Reilly across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1929), then head of a 8-person household.
Age 11
b. ~1929
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Reilly |
| Given Name | John E. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Highest Grade | No 5 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1929 |
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 |
|---|---|---|---|---|
| Florence Reilly | Daughter | — | ~1940 | |
| Jane Reilly | Daughter | — | 8 | ~1932 |
| Norman Reilly | Head | — | 40 | ~1900 |
| John Reilly | Son | — | 11 | ~1929 |
| Paul Reilly | Son | — | 4 | ~1936 |
| Michael Reilly | Son | — | 7 | ~1933 |
| Edward Reilly | Son | — | 10 | ~1930 |
| Helen Reilly | Spouse | — | 38 | ~1902 |
Census Appearances
1930
Cook, Illinois
Son, age 1
Cook, Illinois · implied b. ~1929 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Reilly |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Ireland Free State |
| Mother's Birthplace | Ireland Free State |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 11
Cook-County, Illinois · implied b. ~1929 — 8 household members
| Surname | Reilly |
| Given Name | John E. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Highest Grade | No 5 |
| 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 Reilly across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Reilly
Son · 1940 · age 11 · b. ~1929 · Illinois
★ You are viewing this record
Sibling
Michael Reilly
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Paul Reilly
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Florence Reilly
Sibling · 1940 · age
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jane Reilly
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edward Reilly
Sibling · 1940 · age 10
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-t0627-00940-00185)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Josephine Levaner | 58 | Mother in law | — | Indiana |
| 42 | Oliver Fahrenbach | 41 | Head | Foreman | Illinois |
| 43 | Anna Fahrenbach | 40 | Wife | — | Illinois |
| 44 | Mary Fahrenbach | 9 | Daughter | — | Illinois |
| 45 | Ralph O. Belhom | 44 | Head | Salesman | Illinois |
| 46 | Henrietta Belhom | 38 | Wife | Clerk | Germany |
| 47 | Jennie Dykstra | 47 | Head | — | Holland |
| 48 | Ben Dykstra | 22 | Son | Clerk | Holland |
| 49 | Charles Larson | 40 | Head | Salesman | Illinois |
| 50 | Mildred Larson | 39 | Wife | Key Punch | Illinois |
| 51 | Kathryn Larson | 17 | Daughter | — | Illinois |
| 52 | Doris Larson | 14 | Daughter | — | Illinois |
| 53 | Rodger Larson | 12 | Son | — | Illinois |
| 54 | Carl Johnson | 40 | Head | Carpenter | Sweden |
| 55 | Greta Johnson | 35 | Wife | — | Sweden |
| 56 | Dorothy Johnson | 10 | Daughter | — | Illinois |
| 57 | John A. Mckinnon | 51 | Head | Machinist | Scotland |
| 58 | Janet Mckinnon | 46 | Wife | Maid | Scotland |
| 59 | William A. Anderson | 21 | Head | Fitter | Michigan |
| 60 | Edith Anderson | 26 | Wife | Salesclerk | Illinois |
| 61 | Oscar O. Westberg | 66 | Head | Mill Handler | Sweden |
| 62 | Sophie Evenstad | 56 | Sister | — | Switzerland |
| 63 | William Hall | 67 | Lodger | — | England |
| 64 | Norman J. Reilly | 40 | Head | Salesman | Illinois |
| 65 | Helen C. Reilly | 38 | Wife | — | Illinois |
| 66 | John E. Reilly THIS PERSON | 11 | Son | — | Illinois |
| 67 | Edward C. Reilly | 10 | Son | — | Illinois |
| 68 | Jane E. Reilly | 8 | Daughter | — | Illinois |
| 69 | Michael K. Reilly | 7 | Son | — | Illinois |
| 70 | Paul J. Reilly | 4 | Son | — | Illinois |
| 71 | Florence M. Reilly | 0 | Daughter | — | Illinois |
| 72 | Charles G. Denham | 28 | Head | Estimator | Pennsylvania |
| 73 | Petronella Denham | 50 | Wife | — | Pennsylvania |
| 74 | Nicholas Wiersema | 51 | Head | Salesman | Illinois |
| 75 | Louise A. Wiersema | 44 | Wife | — | Illinois |
| 76 | Clifford Mcgrath | 36 | Head | Salesman | Illinois |
| 77 | Dorothy Mcgrath | 32 | Wife | Secretary | Illinois |
| 78 | Caroline Mercier | 59 | Mother in law | — | Scotland |
| 79 | Napoleon Mercier | 29 | Brother in law | Laborer | Illinois |
| 80 | Theodore Suron | 30 | Head | Clerk | 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)