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John Reardon — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this John Reardon across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1911), then head of a 8-person household.
Age 29
b. ~1911
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Reardon |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Oak Park |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Truck Driver |
| Industry | Local Road |
| Class of Worker | PW |
| Hours Worked | 60 |
| Income (1939) | 950 |
| Highest Grade | No 8 |
| 1935 Residence | Same Place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Truck Driver |
| Township / Ward | Oak Park |
| 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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Margaret Reardon | Spouse | — | 56 | ~1884 |
| Bruce Reardon | Son | — | 16 | ~1924 |
| Laurence Reardon | Son | — | 21 | ~1919 |
| Fern Reardon | Daughter | — | 18 | ~1922 |
| William Reardon | Son | — | 28 | ~1912 |
| Honore Reardon | Daughter | — | 8 | ~1932 |
| John Reardon | Son | — | 29 | ~1911 |
| Margaret Reardon | Daughter | — | 11 | ~1929 |
Census Appearances
1930
Cook, Illinois
Son, age 18
Cook, Illinois · implied b. ~1912 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Reardon |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Germany |
| Occupation | Chauffeur |
| Industry | Coal Yard |
| Class of Worker | 8690 |
| 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 — 8 household members
| Surname | Reardon |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Oak Park |
| 1935 Residence (County) | Cook |
| Occupation | Truck Driver |
| Industry | Local Road |
| Class of Worker | PW |
| Hours Worked | 60 |
| Income (1939) | 950 |
| Highest Grade | No 8 |
| 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 Reardon across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Reardon
Son · 1940 · age 29 · b. ~1911 · Illinois
★ You are viewing this record
Sibling
Margaret Reardon
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bruce Reardon
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Laurence Reardon
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Honore Reardon
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Fern Reardon
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Reardon
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
40 people indexed on this census page (nara:1940:m-t0627-00785-01008)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Margaret Reardon | 56 | Wife | — | Germany |
| 2 | John Reardon THIS PERSON | 29 | Son | Truck Driver | Illinois |
| 3 | William Reardon | 28 | Son | Laborer | Illinois |
| 4 | Laurence Reardon | 21 | Son | Clerk | Illinois |
| 5 | Fern Reardon | 18 | Daughter | — | Michigan |
| 6 | Bruce Reardon | 16 | Son | — | Michigan |
| 7 | Margaret Reardon | 11 | Daughter | — | Michigan |
| 8 | Honore Reardon | 8 | Daughter | — | Michigan |
| 9 | Alphonso Fiedler | 37 | Head | Manager | Illinois |
| 10 | Margaret Fiedler | 38 | Wife | — | Tennessee |
| 11 | James N. Fiedler | 8 | Son | — | Illinois |
| 12 | Charles Batty | 85 | Father-in-law | — | England |
| 13 | Annie Batty | 61 | Mother-in-law | — | Tennessee |
| 14 | Gary J. Futtrell | 37 | Head | Checker | Oklahoma |
| 15 | Ethel Futtrell | 32 | Wife | Bookkeeper | Canada English |
| 16 | Richard Futtrell | 7 | Son | — | Illinois |
| 17 | Gene Rickett | 32 | Head | Salesman | Illinois |
| 18 | Palm Rickett | 30 | Wife | — | Pennsylvania |
| 19 | Stanley Malaj | 48 | Head | Janitor | Poland |
| 20 | Helen Malaj | 26 | Daughter | — | Illinois |
| 21 | Jennie Malaj | 24 | Daughter | Bookkeeper | Illinois |
| 22 | William Sweeney | 52 | Head | Way Bill Clerk | Illinois |
| 23 | Anne Sweeney | 38 | Wife | Comptometer Operator | Illinois |
| 24 | Carl Shattuck | 56 | Head | Post Clerk | Illinois |
| 25 | Grace Shattuck | 45 | Wife | Telephone Operator | Minnesota |
| 26 | Albert D. Davis | 60 | Head | Dentist | Illinois |
| 27 | Elizabeth A. Davis | 59 | Wife | — | Wisconsin |
| 28 | John A. Dolan | 25 | Head | Bookkeeper | Illinois |
| 29 | Hazel Dolan | 26 | Wife | Comptometer Operator | Iowa |
| 30 | Robert J. Patterson | 32 | Head | Electric Inspector | Illinois |
| 31 | Jessie Patterson | 33 | Wife | Secretary | Illinois |
| 32 | Clarence J. Mccartney | 58 | Head | Salesman | Illinois |
| 33 | Lillian Mccartney | 58 | Wife | — | Illinois |
| 34 | Oscar R. Trubell | 36 | Head | Element Research | Montana |
| 35 | Marie Trubell | 31 | Wife | — | Illinois |
| 36 | Lloyd Weidner | 29 | Head | Asst. Junior Engineer | Indiana |
| 37 | Patricia Weidner | 24 | Wife | Copywriter | Illinois |
| 38 | Minnie Tonn | 49 | Head | Ticket Agent | Germany |
| 39 | Louise Tonn | 35 | Sister | Comptometer Operator | Illinois |
| 40 | Ronald Wollbrandt | 24 | Head | Mail Clerk | Nebraska |
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)