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John Chapman — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Morgan-County, Illinois
Our Model Tree links this John Chapman across the 1920, 1930 and 1940 US Censuses in Morgan-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1903), then head of a 6-person household.
Age 37
b. ~1903
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Morgan-County, Illinois |
| Surname | Chapman |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Virginia |
| 1935 Residence (County) | Cass |
| Additional Details | |
| Occupation | Clerical |
| Industry | Book Bindery |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1400 |
| Highest Grade | H-2 |
| 1935 Residence | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Clerical |
| Township / Ward | Jacksonville |
| Est. Birth Year | ~1903 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Nancy Chapman | Daughter | — | 4 | ~1936 |
| John Chapman | Head | — | 37 | ~1903 |
| John Smith | Other | — | 28 | ~1912 |
| Elizabeth Thacker | Other | — | 18 | ~1922 |
| John Chapman | Son | — | 7 | ~1933 |
| Mildred Chapman | Spouse | — | 31 | ~1909 |
Census Appearances
1920
Morgan, Illinois
Son, age 18
Morgan, Illinois · implied b. ~1902 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Chapman |
| Given Name | John R |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Morgan, Illinois
Head, age 27
Morgan, Illinois · implied b. ~1903 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Chapman |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 21 |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | Bookkeeper |
| Industry | Bank |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | $25 |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Morgan-County, Illinois
Head, age 37
Morgan-County, Illinois · implied b. ~1903 — 6 household members
| Surname | Chapman |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Virginia |
| 1935 Residence (County) | Cass |
| Occupation | Clerical |
| Industry | Book Bindery |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1400 |
| Highest Grade | H-2 |
| 1935 Residence | Illinois |
| 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 Chapman 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 Chapman
Head · 1940 · age 37 · b. ~1903 · 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 — Morgan-County, Illinois
Open full size
1940 US Federal Census — Morgan-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00861-00552)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mary Jane Dowling | 2 | daughter | — | Illinois |
| 2 | Tracy Johnson | 30 | Head | Salesman | Illinois |
| 3 | Dolores Johnson | 24 | Wife | Book Keeper | Illinois |
| 4 | Robert Seymour | 40 | Head | Barber | Illinois |
| 5 | Kathryn Seymour | 39 | Wife | Bookkeeper | Illinois |
| 6 | Roberta Seymour | 11 | daughter | — | Illinois |
| 7 | Paul Mcgrew | 26 | Head | Salesman | Illinois |
| 8 | Vera Mcgrew | 28 | Wife | Lunch Room Waitress | Illinois |
| 9 | John Chapman THIS PERSON | 37 | Head | Clerical | Illinois |
| 10 | Mildred Chapman | 31 | Wife | Housework | Illinois |
| 11 | John Jr Chapman | 7 | son | — | Illinois |
| 12 | Nancy Chapman | 4 | daughter | — | Illinois |
| 13 | Elizabeth Thacker | 18 | lodger | — | Illinois |
| 14 | John Smith | 28 | lodger | Supt Of Plant | Iowa |
| 15 | Anna Smith | 52 | Head | Housework | Illinois |
| 16 | Sherman Smith | 33 | son | Hydro Therapist | Illinois |
| 17 | Armeda Smith | 22 | daughter | Sec To Ed Hughes | Illinois |
| 18 | Celia Murphy | 54 | sister | Seamstress | Illinois |
| 19 | Ada Blackburn | 61 | Wife | Housework | Illinois |
| 20 | Florine Blackburn | 31 | daughter | Hydro Therapist | Illinois |
| 21 | Wayne Blackburn | 22 | son | Senior Clerk | Illinois |
| 22 | Walter Agans | 15 | grand son | — | Illinois |
| 23 | Donald Agans | 11 | grand son | — | Illinois |
| 24 | Gerald Agans | 8 | grand son | — | Illinois |
| 25 | John Lair | 22 | Head | Laborer | Illinois |
| 26 | Bernadine Lair | 22 | Wife | — | Illinois |
| 27 | Judith Ann Lair | 1 | daughter | — | Illinois |
| 28 | Beulah Stevens | 18 | lodger | Servant | Illinois |
| 29 | Fred Spalding | 26 | Head | Laborer | Illinois |
| 30 | Bessie Spalding | 26 | Wife | Nurse | Illinois |
| 31 | Lewis Boland | 41 | Head | Carpenter | Missouri |
| 32 | Dora Boland | 36 | Wife | Teacher | Missouri |
| 33 | Ernest Hoagland | 34 | Head | Printer | Illinois |
| 34 | Ruth Hoagland | 37 | Wife | Housework | Illinois |
| 35 | Charlotte Hoagland | 4 | daughter | — | Illinois |
| 36 | John Shadid | 49 | Head | Shoerepairing | Syria |
| 37 | Sadie Shadid | 49 | Wife | Housework | Syria |
| 38 | Melvin Shadid | 25 | son | Salesman | Illinois |
| 39 | Oswald Wardle | 46 | Head | — | England |
| 40 | Ruth Wardle | 36 | Wife | Housework | 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)