MK
Mary Klein — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Marshall-County, Illinois
Our Model Tree links this Mary Klein across the 1930 and 1940 US Censuses in Marshall-County, Illinois (XGBoost, ~Confirmed) — first a daughter (b.~1929), then head of a 8-person household.
Age 11
b. ~1929
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Marshall-County, Illinois |
| Surname | Klein |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Whitefield Twp |
| 1935 Residence (County) | Marshall |
| Additional Details | |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Whitefield Twp |
| Est. Birth Year | ~1929 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Arnold Klein | Son | — | 19 | ~1921 |
| Fred Klein | Head | — | 42 | ~1898 |
| Mary Klein | Daughter | — | 11 | ~1929 |
| Merle Klein | Son | — | 13 | ~1927 |
| Norma Klein | Daughter | — | 16 | ~1924 |
| Darlene Klein | Daughter | — | 8 | ~1932 |
| Eugene Klein | Son | — | 22 | ~1918 |
| Grace Klein | Spouse | — | 44 | ~1896 |
Census Appearances
1930
Marshall, Illinois
Daughter, age 1
Marshall, Illinois · implied b. ~1929 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Klein |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Marshall-County, Illinois
Daughter, age 11
Marshall-County, Illinois · implied b. ~1929 — 8 household members
| Surname | Klein |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Whitefield Twp |
| 1935 Residence (County) | Marshall |
| 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 Klein across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Klein
Daughter · 1940 · age 11 · b. ~1929 · Illinois
★ You are viewing this record
Sibling
Merle Klein
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Arnold Klein
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eugene Klein
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Norma Klein
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Darlene Klein
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 — Marshall-County, Illinois
Open full size
1940 US Federal Census — Marshall-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00854-00379)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Dorothy Shearin | 25 | Wife | — | Illinois |
| 2 | Nancy Shearin | 1 | Daughter | — | Illinois |
| 3 | Charles Bogner | 32 | Head | Farmer | Illinois |
| 4 | Mildred Bogner | 33 | Wife | — | Illinois |
| 5 | Mary Ann Bogner | 12 | Daughter | — | Illinois |
| 6 | Fred Ely | 50 | Head | Farmer | Illinois |
| 7 | Myrtle Annie Ely | 45 | Wife | — | Kansas |
| 8 | Albert Neumann | 75 | Head | — | Illinois |
| 9 | Sarah Neumann | 66 | Wife | — | Illinois |
| 10 | Lawrence Neumann | 30 | Son | Farmer | Illinois |
| 11 | Louis Aufenberg | 41 | Head | Farm Hand | Illinois |
| 12 | Katherine Aufenberg | 38 | Wife | — | Illinois |
| 13 | Donald Aufenberg | 13 | Son | — | Illinois |
| 14 | Doris Aufenberg | 8 | Daughter | — | Illinois |
| 15 | Jeanette Aufenberg | 1 | Daughter | — | Illinois |
| 16 | Fred Klein | 42 | Head | Farmer | Illinois |
| 17 | Grace Klein | 44 | Wife | — | Illinois |
| 18 | Eugene Klein | 22 | Son | Farm Hand | Illinois |
| 19 | Arnold Klein | 19 | Son | Farm Hand | Illinois |
| 20 | Norma Klein | 16 | Daughter | — | Illinois |
| 21 | Merle Klein | 13 | Son | — | Illinois |
| 22 | Mary Klein THIS PERSON | 11 | Daughter | — | Illinois |
| 23 | Darlene Klein | 8 | Daughter | — | Illinois |
| 24 | Charles Geitner | 61 | Head | Farmer | Illinois |
| 25 | Agnes Geitner | 57 | Wife | — | Illinois |
| 26 | Leo Geitner | 33 | Son | Mech | Illinois |
| 27 | Thomas Geitner | 30 | Son | Laborer | Illinois |
| 28 | Leo Schubert | 52 | Head | Farmer | Illinois |
| 29 | Bertha Schubert | 47 | Wife | — | Illinois |
| 30 | Charles Schubert | 23 | Son | Farm Hand | Illinois |
| 31 | Vincent Schubert | 16 | Son | Farm Hand | Colorado |
| 32 | James Wallace | 79 | Head | — | Illinois |
| 33 | Alice Wallace | 73 | Wife | — | Illinois |
| 34 | Charles Wallace | 40 | Son | Farm Hand | Illinois |
| 35 | Raymond Stange | 26 | Head | Farmer | Illinois |
| 36 | Celia Stange | 27 | Wife | — | Illinois |
| 37 | Patricia Ann Stange | 4 | Daughter | — | Illinois |
| 38 | Rita May Stange | 1 | Daughter | — | Illinois |
| 39 | Joan Louise Stange | 12 | Daughter | — | Illinois |
| 40 | Harry Neumann | 55 | Head | Farmer | 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)