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John Allen — 1940 US Census Record
Model Tree available1940 United States Federal Census · Sangamon-County, Illinois
Our Model Tree links this John Allen across the 1920, 1930 and 1940 US Censuses in Sangamon-County, Illinois (XGBoost, ~Confirmed), with identified parents George & William — first a son (b.~1919), then head of a 6-person household.
Age 21
b. ~1919
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Sangamon-County, Illinois |
| Surname | Allen |
| Given Name | John |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Springfield City |
| 1935 Residence (County) | Sangamon |
| Additional Details | |
| Occupation | Farm Hand |
| Industry | Farm |
| Class of Worker | PW |
| Income (1939) | 364 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Farm Hand |
| Township / Ward | Springfield City |
| Est. Birth Year | ~1919 |
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 |
|---|---|---|---|---|
| Stella Allen | Daughter | — | 19 | ~1921 |
| William Allen | Head | — | 56 | ~1884 |
| John Allen | Other | — | 1 | ~1939 |
| George Allen | Other | — | 5 | ~1935 |
| John Allen | Son | — | 21 | ~1919 |
| Mary Allen | Spouse | — | 55 | ~1885 |
Census Appearances
1920
Sangamon, Illinois
Son, age 1
Sangamon, Illinois · implied b. ~1919 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Allen |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Missouri |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Sangamon, Illinois
Son, age 11
Sangamon, Illinois · implied b. ~1919 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Allen |
| Given Name | John |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Missouri |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Sangamon-County, Illinois
Son, age 21
Sangamon-County, Illinois · implied b. ~1919 — 6 household members
| Surname | Allen |
| Given Name | John |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Springfield City |
| 1935 Residence (County) | Sangamon |
| Occupation | Farm Hand |
| Industry | Farm |
| Class of Worker | PW |
| Income (1939) | 364 |
| Highest Grade | 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 Allen across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father George Allen (~0.92 confidence) and father William Allen (~0.92 confidence) and father William Allen (~0.92 confidence) and mother Mary Allen (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
George Allen
b. ~1883
Source father
● Household
· direct · ~0.92
Father
William Allen
b. ~1884
Source father
● Household
· direct · ~0.92
Father
William Allen
b. ~1884
Source father
● Household
· direct · ~0.92
Mother
Mary Allen
b. ~1885
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Allen
Son · 1940 · age 21 · b. ~1919 · Illinois
★ You are viewing this record
Sibling
Stella Allen
Sibling · 1940 · age 19
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 — Sangamon-County, Illinois
Open full size
1940 US Federal Census — Sangamon-County, Illinois
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-00884-00388)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Eleanor Reich | 7 | daughter | — | Illinois |
| 42 | Helores Reich | 2 | daughter | — | Illinois |
| 43 | Clement Reich | 0 | son | — | Illinois |
| 44 | Michael Purcell | 47 | Head | Coal Digger | Lithuania |
| 45 | Catherine Purcell | 40 | wife | — | Illinois |
| 46 | John Number | 16 | stepson | New Worker | Illinois |
| 47 | Anna Valentinus | 76 | Head | — | Lithuania |
| 48 | John Chenis | 21 | grandson | — | Illinois |
| 49 | Albert Chenis | 14 | grandson | — | Illinois |
| 50 | Donald Buckley | 26 | Head | Machine Operator | Wisconsin |
| 51 | Margaret Buckley | 26 | wife | — | Illinois |
| 52 | Gerald Buckley | 4 | son | — | Illinois |
| 53 | Lee Buckley | 3 | son | — | Illinois |
| 54 | Patricia Buckley | 1 | daughter | — | Illinois |
| 55 | Donald Jr. Buckley | 0 | son | — | Illinois |
| 56 | Anna Bollusky | 62 | Head | — | Lithuania |
| 57 | Joseph Kalinaukas | 34 | son | Laborer | Illinois |
| 58 | Adam Newman | 63 | Head | Coal Digger | Germany |
| 59 | Minnie Newman | 63 | wife | — | Germany |
| 61 | John Korenza | 60 | Head | Coal Digger | Austria-Hungary |
| 62 | Mary Korenza | 58 | wife | — | Austria-Hungary |
| 63 | Clarence Peters | 25 | Head | Sweeper | Pennsylvania |
| 64 | Rose Peters | 25 | wife | — | Illinois |
| 65 | Clarence Jr. Peters | 1 | son | — | Illinois |
| 66 | William Allen | 56 | Head | Truck Driver | Illinois |
| 67 | Mary Allen | 55 | wife | — | Missouri |
| 68 | John Allen THIS PERSON | 21 | son | Farm Hand | Illinois |
| 69 | Stella Allen | 19 | daughter | — | Indiana |
| 70 | George Allen | 5 | grandson | — | Illinois |
| 71 | John Jr. Allen | 1 | grandson | — | Illinois |
| 72 | Frank Zions | 39 | Head | Coal Digger | Poland |
| 73 | Mary Zions | 37 | wife | — | Illinois |
| 74 | John Ambroz | 64 | Head | Coal Digger | Poland |
| 75 | Frank Rychel | 21 | stepson | Laborer | Illinois |
| 76 | Anna Shadow | 40 | Head | Hand Sewer | Illinois |
| 77 | Charles Shadow | 16 | son | New Worker | Illinois |
| 78 | Minnie Shadow | 13 | daughter | — | Illinois |
| 79 | Florence Shadow | 12 | daughter | — | Illinois |
| 80 | Margaret Shadow | 10 | daughter | — | Illinois |
Related Census Records
Pedigree Summary
John + 1 sibling
Gen 1 · 4 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)