MP
Mary Post — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Mason-County, Illinois
Our Model Tree links this Mary Post across the 1930 and 1940 US Censuses in Mason-County, Illinois (XGBoost, ~Confirmed) — first a daughter (b.~1922), then head of a 7-person household.
Age 18
b. ~1922
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Mason-County, Illinois |
| Surname | Post |
| Given Name | Mary Belle |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Allens Grove |
| 1935 Residence (County) | Mason |
| Additional Details | |
| Occupation | helper |
| Industry | farm |
| Class of Worker | NP |
| Hours Worked | 40 |
| Income (1939) | 0 |
| Highest Grade | 6 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Helper |
| Township / Ward | Allens Grove |
| Est. Birth Year | ~1922 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Serene Post | Daughter | — | 12 | ~1928 |
| Richard Post | Son | — | 8 | ~1932 |
| Robert Post | Son | — | 10 | ~1930 |
| Mary Post | Daughter | — | 18 | ~1922 |
| John Post | Son | — | 16 | ~1924 |
| Margaret Post | Spouse | — | 41 | ~1899 |
| Jerry Post | Head | — | 41 | ~1899 |
Census Appearances
1930
Mason, Illinois
Daughter, age 7
Mason, Illinois · implied b. ~1923 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Post |
| Given Name | Maybella |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 7 |
| 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
Mason-County, Illinois
Daughter, age 18
Mason-County, Illinois · implied b. ~1922 — 7 household members
| Surname | Post |
| Given Name | Mary Belle |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Allens Grove |
| 1935 Residence (County) | Mason |
| Occupation | helper |
| Industry | farm |
| Class of Worker | NP |
| Hours Worked | 40 |
| Income (1939) | 0 |
| Highest Grade | 6 |
| 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 Mary Post across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Post
Daughter · 1940 · age 18 · b. ~1922 · Illinois
★ You are viewing this record
Sibling
Serene Post
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Post
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Post
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Post
Sibling · 1940 · age 8
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 — Mason-County, Illinois
Open full size
1940 US Federal Census — Mason-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00855-00029)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Edith Smith | 50 | wife | Housewife | Illinois |
| 42 | Bernard Smith | 24 | son | Insurance Agent | Illinois |
| 43 | Robert Smith | 23 | son | New Worker | Illinois |
| 44 | Geraldine Smith | 22 | daughter | School Teacher | Illinois |
| 45 | Mardel Smith | 14 | daughter | New Worker | Illinois |
| 46 | Samuel Taylor | 32 | head | Farmhand | Indiana |
| 47 | Ruby Taylor | 25 | wife | Housework | Illinois |
| 48 | Emily Frances Taylor | 5 | daughter | — | Illinois |
| 49 | William Smith | 54 | head | Farming | Illinois |
| 50 | Sora Smith | 52 | wife | Housewife | Illinois |
| 51 | Helen Smith | 17 | daughter | New Worker | Illinois |
| 52 | John Smith | 14 | son | New Worker | Illinois |
| 53 | Henry Mangold | 65 | helper | Farmhand | Illinois |
| 54 | Jerry Post | 41 | head | Farming | Illinois |
| 55 | Margaret Post | 41 | wife | Housewife | Illinois |
| 56 | Mary Belle Post THIS PERSON | 18 | daughter | Helper | Illinois |
| 57 | John Post | 16 | son | New Worker | Illinois |
| 58 | Serene Post | 12 | daughter | — | Illinois |
| 59 | Robert Post | 10 | son | — | Illinois |
| 60 | Richard Post | 8 | son | — | Illinois |
| 61 | Louis Mochrung | 43 | head | Farming | Illinois |
| 62 | Emma Mochrung | 40 | wife | Housewife | Illinois |
| 63 | Frances Mochrung | 20 | daughter | Housework | Illinois |
| 64 | Hazel Mochrung | 18 | daughter | New Worker | Illinois |
| 65 | Ester Mochrung | 16 | daughter | New Worker | Illinois |
| 66 | Florence Mochrung | 14 | daughter | New Worker | Illinois |
| 67 | Louis J. Mochrung | 13 | son | — | Illinois |
| 68 | Henry Mochrung | 11 | son | — | Illinois |
| 69 | Elizabeth Mochrung | 9 | daughter | — | Illinois |
| 70 | David Mochrung | 7 | son | — | Illinois |
| 71 | Raymond Mochrung | 4 | son | — | Illinois |
| 72 | Donald Mochrung | 2 | son | — | Illinois |
| 73 | John P. Adolph | 69 | head | Engin Salesman | Germany |
| 74 | Emma Adolph | 67 | wife | Retired | Illinois |
| 75 | William Purdle | 47 | head | Farming | Illinois |
| 76 | Clara Purdle | 44 | wife | Housewife | Illinois |
| 77 | Velma Purdle | 19 | daughter | Helper | Illinois |
| 78 | Delmar Purdle | 15 | son | New Worker | Illinois |
| 79 | Gus Tallas | 47 | head | Tavern Keeper | Greece |
| 80 | Oscar Hunt | 37 | head | Farming | 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)