JC
John Carson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Champaign-County, Illinois
Our Model Tree links this John Carson across the 1930 and 1940 US Censuses in Champaign-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1921), then head of a 6-person household.
Age 19
b. ~1921
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Champaign-County, Illinois |
| Surname | Carson |
| Given Name | John D. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Urbana City |
| 1935 Residence (County) | Champaign |
| Additional Details | |
| Highest Grade | C 1 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Urbana City |
| Est. Birth Year | ~1921 |
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 |
|---|---|---|---|---|
| Mary Inman | Daughter | — | 30 | ~1910 |
| Joseph Carson | Son | — | 24 | ~1916 |
| Mary Carson | Spouse | — | 53 | ~1887 |
| John Carson | Son | — | 19 | ~1921 |
| Francis Carson | Head | — | 60 | ~1880 |
| Thomas Carson | Son | — | 25 | ~1915 |
Census Appearances
1930
Champaign, Illinois
Son, age 9
Champaign, Illinois · implied b. ~1921 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carson |
| Given Name | John D |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Champaign-County, Illinois
Son, age 19
Champaign-County, Illinois · implied b. ~1921 — 6 household members
| Surname | Carson |
| Given Name | John D. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Urbana City |
| 1935 Residence (County) | Champaign |
| Highest Grade | C 1 |
| 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 Carson across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Carson
Son · 1940 · age 19 · b. ~1921 · Illinois
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Sibling
Mary Inman
Sibling · 1940 · age 30
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Carson
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Carson
Sibling · 1940 · age 24
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 — Champaign-County, Illinois
Open full size
1940 US Federal Census — Champaign-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00765-00944)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Christine W Apperson | 24 | wife | — | Illinois |
| 2 | Reinhold P Larson | 40 | head | Instructor | Illinois |
| 3 | Grace B Larson | 44 | wife | — | Illinois |
| 4 | Jay R Larson | 7 | son | — | Illinois |
| 5 | Arnold W Gerlach | 33 | head | Salesman | Iowa |
| 6 | Vera B Gerlach | 31 | wife | House Work | Illinois |
| 7 | David M Gerlach | 17 | son | — | Illinois |
| 8 | C. Roedarmel | 25 | lodger | Electrician | Illinois |
| 9 | Clara E Renfrew | 58 | head | Instructor | Illinois |
| 10 | Dale Les. Allen | 37 | head | Instructor | Illinois |
| 11 | Ella Mae Allen | 37 | wife | Housework | Illinois |
| 12 | Dorothy Mae Ridgley | 20 | step-daughter | Bookkeeper | Iowa |
| 13 | Gloria Jane Ridgley | 17 | step-daughter | — | Illinois |
| 14 | Mollie A Giblin | 74 | head | — | Illinois |
| 15 | Nancy Rusk | 70 | head | — | Illinois |
| 16 | Frank M Corray | 37 | head | Owner & Mgr | Illinois |
| 17 | Reta Corray | 37 | wife | — | Illinois |
| 18 | Roger M. Corray | 6 | son | — | Illinois |
| 19 | Robert Corray | 4 | son | — | Illinois |
| 20 | Sara L. Bing | 72 | head | — | Indiana |
| 21 | Bertha Slover | 42 | daughter | — | Illinois |
| 22 | Carl C Slover | 42 | son-in-law | Carpenter | Illinois |
| 23 | Minnie M Ward | 60 | head | — | Nebraska |
| 24 | E. Paul Ward | 35 | son | Exterminator | Illinois |
| 25 | Harold R Ward | 31 | son | Pool Hall | Illinois |
| 26 | Hershel H. Ward | 35 | head | Machinist | Illinois |
| 27 | Cora C Ward | 35 | wife | Maid | Illinois |
| 28 | Edward Ward | 10 | son | — | Illinois |
| 29 | Dorothy Joan Ward | 7 | daughter | — | Illinois |
| 30 | Francis D Carson | 60 | head | Attorney | Illinois |
| 31 | Mary K Carson | 53 | wife | — | Illinois |
| 32 | Mary Anne Inman | 30 | daughter | — | Illinois |
| 33 | Thomas B. Carson | 25 | son | Attorney | Illinois |
| 34 | Joseph R. Carson | 24 | son | — | Illinois |
| 35 | John D. Carson THIS PERSON | 19 | son | — | Illinois |
| 36 | Commet G. Yearley | 76 | head | Salesman | Ohio |
| 37 | Alma C Yearley | 76 | wife | — | Indiana |
| 38 | Mary Yearley | 41 | daughter | Social Worker | Illinois |
| 39 | Marion Harland | 44 | head | Business Mgr | Illinois |
| 40 | Helen W Harland | 42 | wife | — | Illinois |
Related Census Records
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)