JL
John Leach — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Macon-County, Illinois
Our Model Tree links this John Leach across the 1930 and 1940 US Censuses in Macon-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1930), then head of a 7-person household.
Age 10
b. ~1930
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Macon-County, Illinois |
| Surname | Leach |
| Given Name | John T. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Maroa City |
| 1935 Residence (County) | Macon |
| Additional Details | |
| Highest Grade | No 5 |
| 1935 Residence | Same house |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Maroa City |
| Est. Birth Year | ~1930 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Leach | Son | — | 10 | ~1930 |
| Ruth Leach | Daughter | — | 18 | ~1922 |
| Virgil Leach | Head | — | 49 | ~1891 |
| Charles Leach | Son | — | 15 | ~1925 |
| James Leach | Son | — | 13 | ~1927 |
| Margaret Leach | Spouse | — | 45 | ~1895 |
| Margurite Leach | Daughter | — | 2 | ~1938 |
Census Appearances
1930
Macon, Illinois
Son, age 1
Macon, Illinois · implied b. ~1929 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Leach |
| Given Name | John T. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Kentucky |
| Can Read/Write | No |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Macon-County, Illinois
Son, age 10
Macon-County, Illinois · implied b. ~1930 — 7 household members
| Surname | Leach |
| Given Name | John T. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Maroa City |
| 1935 Residence (County) | Macon |
| Highest Grade | No 5 |
| 1935 Residence | Same house |
| 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 Leach across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Leach
Son · 1940 · age 10 · b. ~1930 · Illinois
★ You are viewing this record
Sibling
Margurite Leach
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Leach
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Leach
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ruth Leach
Sibling · 1940 · age 18
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 — Macon-County, Illinois
Open full size
1940 US Federal Census — Macon-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00845-00480)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Margaret Brown | 19 | Daughter | Housemaid | Iowa |
| 2 | Virgil A. Leach | 49 | Head | Carpenter | Illinois |
| 3 | Margaret Leach | 45 | Wife | — | Kentucky |
| 4 | Ruth L. Leach | 18 | Daughter | Housemaid | Illinois |
| 5 | Charles E. Leach | 15 | Son | Newspaper Boy | Illinois |
| 6 | James W. Leach | 13 | Son | — | Colorado |
| 7 | John T. Leach THIS PERSON | 10 | Son | — | Illinois |
| 8 | Margurite Leach | 2 | Daughter | — | Illinois |
| 9 | John D. Pearson | 33 | Head | Engineer | Oklahoma |
| 10 | Enid M. Pearson | 24 | Wife | — | Illinois |
| 11 | Robert L. Pearson | 10 | Son | — | Missouri |
| 12 | John A. Pearson | 4 | Son | — | Missouri |
| 13 | Beryl Matheny | 39 | Head | Brakeman | Illinois |
| 14 | Verna Matheny | 33 | Wife | — | Illinois |
| 15 | Barbara Matheny | 10 | Daughter | — | Illinois |
| 16 | Charles Thomas | 83 | Head | — | Illinois |
| 17 | Mabel Darling | 28 | Head | Housekeeper | Illinois |
| 18 | Hugh L. Bowden | 32 | Head | Laborer | Illinois |
| 19 | Ruth W. Bowden | 29 | Wife | Bookkeeper | Illinois |
| 20 | Oscar A. Fowler | 29 | Head | Engineer | Missouri |
| 21 | Opal L. Fowler | 22 | Wife | — | Missouri |
| 22 | John E. Fowler | 2 | Son | — | Missouri |
| 23 | Forrest Masterson | 63 | Head | Watchman | Indiana |
| 24 | Mary A. Masterson | 61 | Wife | — | Indiana |
| 25 | Ernest England | 25 | Head | Coach | Illinois |
| 26 | Lois G. England | 31 | Wife | — | Illinois |
| 27 | Forrest R. England | 3 | Son | — | Illinois |
| 28 | Harold Harrington | 32 | Head | Laborer | Illinois |
| 29 | Nellie M. Harrington | 33 | Wife | — | Illinois |
| 30 | Varnil Harrington | 16 | Son | — | Illinois |
| 31 | Alice L. Harrington | 15 | Daughter | — | Illinois |
| 32 | Elmer E. Harrington | 13 | Son | — | Illinois |
| 33 | Mark E. Jordan | 30 | Head | Laborer | Illinois |
| 34 | Anna J. Jordan | 28 | Wife | — | Illinois |
| 35 | Lois B. Jordan | 6 | Daughter | — | Illinois |
| 36 | Ray D. Jordan | 4 | Son | — | Illinois |
| 37 | Nettie D. Vaughn | 70 | Head | — | Illinois |
| 38 | Rebecca Duley | 68 | Head | — | Missouri |
| 39 | Le Roy Duley | 31 | Son | Laborer | Illinois |
| 40 | Arthur Duley | 29 | Son | — | 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)