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John Sears — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this John Sears across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1923), then head of a 8-person household.
Age 17
b. ~1923
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Sears |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | CHICAGO CITY |
| 1935 Residence (County) | COOK |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | S 3 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1923 |
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 |
|---|---|---|---|---|
| John Sears | Son | — | 17 | ~1923 |
| Kathleen Sears | Spouse | — | 35 | ~1905 |
| Howard Sears | Son | — | 14 | ~1926 |
| Louis Sears | Head | — | 39 | ~1901 |
| Lois Sears | Daughter | — | 12 | ~1928 |
| Ronald Sears | Son | — | 10 | ~1930 |
| Gerald Sears | Son | — | 3 | ~1937 |
| Dolores Sears | Daughter | — | 5 | ~1935 |
Census Appearances
1930
Cook, Illinois
Son, age 6
Cook, Illinois · implied b. ~1924 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sears |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | England |
| Mother's Birthplace | England |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 17
Cook-County, Illinois · implied b. ~1923 — 8 household members
| Surname | Sears |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | CHICAGO CITY |
| 1935 Residence (County) | COOK |
| Income (1939) | 0 |
| Highest Grade | S 3 |
| 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 Sears across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Sears
Son · 1940 · age 17 · b. ~1923 · Illinois
★ You are viewing this record
Sibling
Ronald Sears
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Howard Sears
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lois Sears
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gerald Sears
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dolores Sears
Sibling · 1940 · age 5
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-t0627-00955-00797)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Louis Sears | 39 | Head | Bolt Maker | Illinois |
| 2 | Kathleen Sears | 35 | Wife | — | Montreal, Canada |
| 3 | John Sears THIS PERSON | 17 | Son | — | Illinois |
| 4 | Howard Sears | 14 | Son | — | Illinois |
| 5 | Lois Marie Sears | 12 | Daughter | — | Illinois |
| 6 | Ronald Sears | 10 | Son | — | Illinois |
| 7 | Dolores Sears | 5 | Daughter | — | Illinois |
| 8 | Gerald Sears | 3 | Son | — | Illinois |
| 9 | Anton Gardner | 36 | Head | Shipper | Hungary |
| 10 | Julia Gardner | 31 | Wife | Housekeeper | Penn. |
| 11 | Joseph Gardner | 5 | Son | — | Illinois |
| 12 | Lawrence Ibberson | 35 | Head | Electrician | Illinois |
| 13 | Theresa Ibberson | 36 | Wife | — | Illinois |
| 14 | Loren Ibberson | 13 | Son | — | Illinois |
| 15 | Ann Johnson | 56 | Head | — | Sweden |
| 16 | Mildred Johnson | 25 | Daughter | Nurse | Illinois |
| 17 | George Webber | 70 | Head | — | Germany |
| 18 | Dora Webber | 59 | Wife | — | Austria |
| 19 | Felix Webber | 40 | Son | Salesman | Austria |
| 20 | Stella Webber | 37 | Daughter | Shipping Clerk | Illinois |
| 21 | Edward Webber | 34 | Son | Labor | Illinois |
| 22 | Joe Webber | 29 | Son | Labor | Illinois |
| 23 | Fred Ramler | 54 | Head | Oil Cleaner | Michigan |
| 24 | Maude Stromberg | 50 | Sister | — | Michigan |
| 25 | Ruth Stromberg | 25 | Daughter | Housekeeper | Illinois |
| 26 | George Stromberg | 21 | Son | Filing-Clerk | Illinois |
| 27 | Henry Ramler | 48 | Uncle | Yardman | Illinois |
| 28 | William Purtell | 44 | Head | Custodian Labor | Illinois |
| 29 | Elizabeth Purtell | 44 | Wife | — | Austria |
| 30 | Michael Sheehy | 24 | Stepson | Gen. And Accountant | Illinois |
| 31 | Angeline Sheehy | 20 | Daughter | Typist | Illinois |
| 32 | Mary Lundy | 51 | Head | — | Ireland |
| 33 | Maurice Lundy | 25 | Son | Checker | Illinois |
| 34 | Mary Lundy | 21 | Daughter | Typist | Illinois |
| 35 | John Lundy | 18 | Son | Labor | Illinois |
| 36 | Edward Lundy | 16 | Son | Dishwasher | Illinois |
| 37 | Walter Lundy | 15 | Son | — | Illinois |
| 38 | George Lundy | 13 | Son | — | Illinois |
| 39 | Jeanette Lundy | 8 | Daughter | — | Illinois |
| 40 | Sam Ascolani | 54 | Head | Freight Handler | Italy |
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)