RC
Robert Chapman — 1940 US Census Record
Model Tree available1940 United States Federal Census · Sangamon-County, Illinois
Our Model Tree links this Robert Chapman across the 1920, 1930 and 1940 US Censuses in Sangamon-County, Illinois (XGBoost, ~Confirmed), with identified parents Alvin & Nora — first a head (b.~1902), then head of a 6-person household.
Age 38
b. ~1902
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Sangamon-County, Illinois |
| Surname | Chapman |
| Given Name | Robert P. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Springfield City |
| 1935 Residence (County) | Sangamon |
| Additional Details | |
| Occupation | manager |
| Industry | laundry |
| Class of Worker | E |
| Hours Worked | 40 |
| Income (1939) | 1500 |
| Highest Grade | H-3 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Manager |
| Township / Ward | Springfield City |
| Est. Birth Year | ~1902 |
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 Robert | Age | Birth yr |
|---|---|---|---|---|
| Robert Chapman | Son | — | 18 | ~1922 |
| Robert Chapman | Head | — | 38 | ~1902 |
| John Chapman | Son | — | 16 | ~1924 |
| Caroline Chapman | Spouse | — | 40 | ~1900 |
| Richard Chapman | Son | — | 17 | ~1923 |
| Ruth Blakley | Other | — | 26 | ~1914 |
Census Appearances
1920
Sangamon, Illinois
Son, age 18
Sangamon, Illinois · implied b. ~1902 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Chapman |
| Given Name | Robert 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
Sangamon, Illinois
Head, age 28
Sangamon, Illinois · implied b. ~1902 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Chapman |
| Given Name | Robert |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 18 |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | Manager |
| Industry | Laundry |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 6500 |
| Radio Set | R |
| Veteran | No |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Sangamon-County, Illinois
Head, age 38
Sangamon-County, Illinois · implied b. ~1902 — 6 household members
| Surname | Chapman |
| Given Name | Robert P. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Springfield City |
| 1935 Residence (County) | Sangamon |
| Occupation | manager |
| Industry | laundry |
| Class of Worker | E |
| Hours Worked | 40 |
| Income (1939) | 1500 |
| Highest Grade | H-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 Robert Chapman across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Alvin Chapman (~0.92 confidence) and mother Nora Chapman (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Alvin Chapman
b. ~1874
Source father
● Household
· direct · ~0.92
Mother
Nora Chapman
b. ~1885
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Chapman
Head · 1940 · age 38 · b. ~1902 · Illinois
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Sangamon-County, Illinois
Open full size
1940 US Federal Census — Sangamon-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00886-00228)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Benjamin H. Neal | 55 | Head | Accountant | Indiana |
| 2 | Bessie Neal | 56 | Wife | — | Tennessee |
| 3 | Virginia Neal | 30 | Daughter | Stenographer | Illinois |
| 4 | Earl C. Worthington | 35 | Head | Architect | Michigan |
| 5 | Catherine Worthington | 34 | Wife | — | Illinois |
| 6 | Barbara A. Worthington | 1 | Daughter | — | Illinois |
| 7 | Elizabeth Hart | 26 | Mother-in-law | New Worker | Illinois |
| 8 | Virginia Hart | 1 | Nephew | — | Illinois |
| 9 | Rudolph E. Haas | 46 | Head | Salesman | Illinois |
| 10 | Catherine Haas | 33 | Wife | — | Illinois |
| 11 | Rudolph Haas | 9 | Son | — | Illinois |
| 12 | Judith Haas | 3 | Daughter | — | Illinois |
| 13 | Elizabeth Mcalpin | 74 | Mother-in-law | — | Illinois |
| 14 | Elizabeth Franz | 62 | Wife | — | Illinois |
| 15 | Charles J. Franz | 54 | Head | Meat Dealer | Illinois |
| 16 | Helen Franz | 27 | Daughter | Stenographer | Illinois |
| 17 | Elizabeth Drach | 64 | Head | Manager | Illinois |
| 18 | Bess Drach | 38 | Daughter | Manager | Illinois |
| 19 | Ernest W. Bates | 29 | Head | Candler | Missouri |
| 20 | Clara Bates | 24 | Wife | — | Missouri |
| 21 | Robert P. Chapman THIS PERSON | 38 | Head | Manager | Illinois |
| 22 | Caroline Chapman | 40 | Wife | — | Illinois |
| 23 | Robert Chapman | 18 | Son | — | Illinois |
| 24 | Richard Chapman | 17 | Son | — | Illinois |
| 25 | John A. Chapman | 16 | Son | — | Illinois |
| 26 | Ruth Blakley | 26 | Maid | Housework | Illinois |
| 27 | Roy P. Donaldson | 65 | Head | Overseer | Indiana |
| 28 | Mabel Donaldson | 65 | Wife | — | Illinois |
| 29 | E. P. Bates | 49 | Head | Watchman | Illinois |
| 30 | Gladys T. Bates | 44 | Wife | Assistant | Illinois |
| 31 | George Bates | 9 | Son | Life Guard | Illinois |
| 32 | Robert R. Pursell | 74 | Head | Salesman | Illinois |
| 33 | Clara A. Pursell | 69 | Wife | — | Illinois |
| 34 | Elmo E. Edson | 68 | Head | Carpenter | Illinois |
| 35 | Eva C. Edson | 71 | Wife | — | Illinois |
| 36 | L. Harold Brown | 44 | Head | Consulting Engineer | Illinois |
| 37 | Marguerite Brown | 44 | Daughter | File Clerk | Minnesota |
| 38 | Eugene Birch | 45 | Head | Superintendent | Nebraska |
| 39 | Lillian Birch | 54 | Wife | — | Colorado |
| 40 | Leonard Birch | 25 | Son | Never Has Worked (Deaf) | Idaho |
Pedigree Summary
Robert
Gen 1 · 2 parents
~0.92
Max depth 4 (1900–1950 window)
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)