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Mary Leach — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Shelby-County, Illinois
Our Model Tree links this Mary Leach across the 1930 and 1940 US Censuses in Shelby-County, Illinois (XGBoost, ~Confirmed) — first a daughter (b.~1925), then head of a 4-person household.
Age 15
b. ~1925
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Shelby-County, Illinois |
| Surname | Leach |
| Given Name | Mary Lou |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Shelbyville City |
| 1935 Residence (County) | Shelby |
| Additional Details | |
| Highest Grade | Hs 2 |
| 1935 Residence | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Shelbyville City |
| Est. Birth Year | ~1925 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Goldie Leach | Spouse | — | 46 | ~1894 |
| Ned Leach | Head | — | 48 | ~1892 |
| Redford Leach | Son | — | 17 | ~1923 |
| Mary Leach | Daughter | — | 15 | ~1925 |
Census Appearances
1930
Shelby, Illinois
Daughter, age 6
Shelby, Illinois · implied b. ~1924 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Leach |
| Given Name | Mary L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Shelby-County, Illinois
Daughter, age 15
Shelby-County, Illinois · implied b. ~1925 — 4 household members
| Surname | Leach |
| Given Name | Mary Lou |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Shelbyville City |
| 1935 Residence (County) | Shelby |
| Highest Grade | Hs 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 Mary Leach across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Leach
Daughter · 1940 · age 15 · b. ~1925 · Illinois
★ You are viewing this record
Sibling
Redford Leach
Sibling · 1940 · age 17
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 — Shelby-County, Illinois
Open full size
1940 US Federal Census — Shelby-County, Illinois
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-00890-00528)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Fern D Stumpf | 28 | Head | Waitress | Illinois |
| 2 | Wayne D Stumpf | 2 | Son | — | Illinois |
| 4 | George D Watkins | 28 | Head | Coal Miner | Illinois |
| 5 | Lucy Watkins | 24 | Wife | Seamstress | Illinois |
| 6 | Shirley Watkins | 6 | Daughter | — | Illinois |
| 7 | Ed Reed | 46 | Head | Butter Maker | Indiana |
| 8 | Iva Reed | 42 | Wife | — | Indiana |
| 9 | Ronald Reed | 6 | Son | — | Illinois |
| 10 | Josephine Baughman | 24 | Housekeeper | Housekeeper | Illinois |
| 11 | Delbert R Dinwiddie | 34 | Head | Carpenter | Illinois |
| 12 | Laura E Dinwiddie | 35 | Wife | — | Illinois |
| 13 | William Dinwiddie | 13 | Son | — | Illinois |
| 14 | Darlene Dinwiddie | 7 | Daughter | — | Illinois |
| 15 | Ned Leach | 48 | Head | Coal Hoister | Illinois |
| 16 | Goldie Leach | 46 | Wife | — | Illinois |
| 17 | Redford Leach | 17 | Son | Clerk | Illinois |
| 18 | Mary Lou Leach THIS PERSON | 15 | Daughter | — | Illinois |
| 19 | Charlie Parker | 60 | Head | W.P.A. Labour | Illinois |
| 20 | Laura Parker | 67 | Wife | Maid | Illinois |
| 21 | Mae Smith | 72 | Sister-in-law | — | Illinois |
| 22 | Geo Mahnke | 23 | Head | Substitute City Mail Carrier | Illinois |
| 23 | Ethel Mahnke | 24 | Wife | Home Packer | Illinois |
| 24 | Richard Mahnke | 3 | Son | — | Illinois |
| 25 | Sam Robinson | 70 | Head | Odd Jobs | Illinois |
| 26 | Carrie Robinson | 58 | Sister | — | Illinois |
| 27 | Bertha Robinson | 55 | Sister | — | Illinois |
| 28 | Delton Shelton | 67 | Lodger | — | Illinois |
| 29 | John B Spracklen | 61 | Head | Rural Mail Carrier-S | Illinois |
| 30 | Cora M Spracklen | 55 | Wife | — | Illinois |
| 31 | Marion Spracklen | 32 | Son | Radio Service | Illinois |
| 32 | Bernard Spracklen | 17 | Son | — | Illinois |
| 33 | Tom Robinson | 68 | Head | Janitor | Illinois |
| 34 | Minnie Robinson | 67 | Wife | — | Illinois |
| 35 | Lawrence Hatfield | 27 | Head | Mechanic | Illinois |
| 36 | Mae Hatfield | 27 | Wife | — | Illinois |
| 37 | Fay E Sebright | 33 | Head | Part Owner | Illinois |
| 38 | Catharine Sebright | 31 | Wife | Clerk | Illinois |
| 39 | Winifred Sebright | 7 | Daughter | — | Illinois |
| 40 | David H Sebright | 2 | 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)