MG
Mary Glass — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Johnson-County, Illinois
Our Model Tree links this Mary Glass across the 1920, 1930 and 1940 US Censuses in Johnson-County, Illinois (XGBoost, ~Confirmed) — first a spouse (b.~1872), then head of a 3-person household.
Age 68
b. ~1872
Female
Spouse
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Johnson-County, Illinois |
| Surname | Glass |
| Given Name | Mary R. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 68 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Grantsburg Twp. |
| 1935 Residence (County) | Johnson |
| Additional Details | |
| Class of Worker | 0 |
| Hours Worked | 0 |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Grantsburg Twp |
| Est. Birth Year | ~1872 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| James Glass | Head | — | 74 | ~1866 |
| Mary Glass | Spouse | — | 68 | ~1872 |
| Donald Richardson | Son | — | 14 | ~1926 |
Census Appearances
1920
Johnson, Illinois
Spouse, age 45
Johnson, Illinois · implied b. ~1875 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Glass |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Johnson, Illinois
Spouse, age 56
Johnson, Illinois · implied b. ~1874 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Glass |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 56 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 15 |
| Father's Birthplace | Tennessee |
| Mother's Birthplace | Kentucky |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Johnson-County, Illinois
Spouse, age 68
Johnson-County, Illinois · implied b. ~1872 — 3 household members
| Surname | Glass |
| Given Name | Mary R. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 68 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Grantsburg Twp. |
| 1935 Residence (County) | Johnson |
| Class of Worker | 0 |
| Hours Worked | 0 |
| Highest Grade | No 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 Glass across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Glass
Spouse · 1940 · age 68 · b. ~1872 · Illinois
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Johnson-County, Illinois
Open full size
1940 US Federal Census — Johnson-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00818-00181)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Marva L. Rubble | 1 | Daughter | — | Illinois |
| 42 | James F. Glass | 74 | Head | — | Illinois |
| 43 | Mary R. Glass THIS PERSON | 68 | Wife | — | Illinois |
| 44 | Donald L. Richardson | 14 | Son | — | Illinois |
| 45 | John W. Johnston | 71 | Head | — | Illinois |
| 46 | Alice E. Johnston | 69 | Wife | — | Illinois |
| 47 | Jesse L. Johnston | 38 | Son | Painter | Illinois |
| 48 | Carlton E. Johnston | 26 | Son | Road Const | Illinois |
| 49 | George M. Brown | 75 | Head | — | Indiana |
| 50 | Dora B. Brown | 65 | Wife | — | Illinois |
| 51 | Fleet F. Brown | 41 | Head | Farmer | Indiana |
| 52 | Hazel L. Brown | 36 | Wife | — | Illinois |
| 53 | George E. Brown | 18 | Nephew | Farmer | Illinois |
| 54 | Freeman L. Brown | 15 | Son | — | Illinois |
| 55 | Bettie J. Brown | 10 | Daughter | — | Illinois |
| 56 | Shellie L. Brown | 6 | Daughter | — | Illinois |
| 57 | Barbara G. Brown | 5 | Daughter | — | Illinois |
| 58 | Charles W. Phelps | 48 | Head | Farm | Illinois |
| 59 | Mary Phelps | 78 | Mother | — | Illinois |
| 60 | Cassiel Nelson | 34 | Head | Laborer | Illinois |
| 61 | Faye Nelson | 25 | Wife | — | Illinois |
| 62 | John V. Nelson | 9 | Son | — | Illinois |
| 63 | Pauline Nelson | 7 | Daughter | — | Illinois |
| 64 | Wanda Nelson | 4 | Daughter | — | Illinois |
| 65 | Walter J. Nelson | 0 | Son | — | Illinois |
| 66 | Lewis W. Cooper | 47 | Head | Sec Laborer | Illinois |
| 67 | Rosetta Cooper | 41 | Wife | — | Illinois |
| 68 | Rosemary Cooper | 20 | Daughter | — | Illinois |
| 69 | Ray W. Cooper | 18 | Son | — | Illinois |
| 70 | Margie J. Cooper | 11 | Daughter | — | Illinois |
| 71 | Loren R. South | 23 | Step-son | Section Laborer | Illinois |
| 72 | George W. Helm | 74 | Head | Farm | Illinois |
| 73 | Sami E. Helm | 78 | Wife | — | Tennessee |
| 74 | Willie D. Helm | 43 | Son | Farm | Illinois |
| 75 | David M. Helm | 38 | Son | Farm | Illinois |
| 76 | Albert W. Wincke | 23 | Head | Sec Laborer | Illinois |
| 77 | Illa M. Wincke | 21 | Wife | — | Illinois |
| 78 | Ronald A. Wincke | 1 | Son | — | Illinois |
| 79 | William S. Wincke | 75 | Head | Farm | Illinois |
| 80 | Mary L. Wincke | 45 | Wife | — | 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)