MK
Mary Klein — 1940 US Census Record
Linked across censuses1940 United States Federal Census · St.-Louis-County, Missouri
Our Model Tree links this Mary Klein across the 1920, 1930 and 1940 US Censuses in St.-Louis-County, Missouri (XGBoost, ~Confirmed) — first a spouse (b.~1875), then head of a 3-person household.
Age 65
b. ~1875
Female
Spouse
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | St.-Louis-County, Missouri |
| Surname | Klein |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 65 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Kirkwood City |
| 1935 Residence (County) | St. Louis |
| Additional Details | |
| Highest Grade | No 8 |
| 1935 Residence | Same House |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Kirkwood City |
| Est. Birth Year | ~1875 |
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 |
|---|---|---|---|---|
| Mary Klein | Spouse | — | 65 | ~1875 |
| Walter Klein | Son | — | 24 | ~1916 |
| Jacob Klein | Head | — | 69 | ~1871 |
Census Appearances
1920
St Louis, …
Spouse, age 45
St Louis, Missouri · implied b. ~1875 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Klein |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Illinois |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | German |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
St Louis, …
Spouse, age 55
St Louis, Missouri · implied b. ~1875 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Klein |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 55 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 19 |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
St.-Louis-County, Missouri
Spouse, age 65
St.-Louis-County, Missouri · implied b. ~1875 — 3 household members
| Surname | Klein |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 65 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Kirkwood City |
| 1935 Residence (County) | St. Louis |
| Highest Grade | No 8 |
| 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 Mary Klein 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 Klein
Spouse · 1940 · age 65 · b. ~1875 · Missouri
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — St.-Louis-County, Missouri
Open full size
1940 US Federal Census — St.-Louis-County, Missouri
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02147-00090)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Dorothy Shipley | 9 | Daughter | — | Pennsylvania |
| 42 | Howard Shipley | 7 | Son | — | Pennsylvania |
| 43 | Ida Bernice Shipley | 6 | Daughter | — | Pennsylvania |
| 44 | David Shipley | 3 | Son | — | Missouri |
| 45 | William A. Mees | 53 | Head | Clerk | Missouri |
| 46 | Anna Mees | 57 | Wife | — | Missouri |
| 47 | Jacob Klein | 69 | Head | Fireman | Alsace-Lorraine |
| 48 | Mary Klein THIS PERSON | 65 | Wife | — | Illinois |
| 49 | Walter Klein | 24 | Son | New Worker | New Mexico |
| 50 | Wesley Schlueter | 27 | Head | Gas Station Attendant | Missouri |
| 51 | Reba Schlueter | 28 | Wife | — | Missouri |
| 52 | Chester Jones | 37 | In-law | Metal Stamper | Missouri |
| 53 | Henry Schlueter | 53 | Head | Gas Station Proprietor | Missouri |
| 54 | Elizabeth Schlueter | 51 | Wife | — | Missouri |
| 55 | Benjamin T. Elder | 79 | Head | — | Kentucky |
| 56 | Elizabeth Elder | 78 | Wife | — | Ohio |
| 57 | Fred T. Rott | 61 | Head | — | Missouri |
| 58 | Marie E. Rott | 54 | Wife | — | Missouri |
| 59 | Estelle M. Rott | 24 | Daughter | Stenographer | Missouri |
| 60 | Jennie Alter | 79 | Head | — | Missouri |
| 61 | Edith Elbring | 55 | Daughter | — | Missouri |
| 62 | David Elbring | 19 | Son | Electrical Apprentice | Missouri |
| 63 | Frank Batts | 52 | Head | Attorney | Tennessee |
| 64 | Lila Batts | 49 | Wife | — | Tennessee |
| 65 | Frank Jr. Batts | 18 | Son | — | Missouri |
| 66 | Robert Batts | 16 | Son | — | Arkansas |
| 67 | Margaret Batts | 15 | Daughter | — | Arkansas |
| 68 | Louis Batts | 12 | Son | — | Missouri |
| 69 | Lizzie Batts | 80 | Mother | — | Tennessee |
| 70 | Sara Boone | 65 | Head | — | Canada English |
| 71 | Maurice Boone | 34 | Son | Manager | Canada English |
| 72 | Evelyn Boone | 33 | In-law | — | Kansas |
| 73 | Sharon Boone | 1 | Daughter | — | Missouri |
| 74 | Patricia Allan | 12 | Ward | — | Missouri |
| 75 | Milton M. Dubois | 84 | Head | Owner-Manager | New York |
| 76 | Margaret Adams | 56 | House Keeper | House Keeper | Missouri |
| 77 | Harold Johnson | 23 | Head | Assembler | Missouri |
| 78 | Mildred Johnson | 18 | Wife | — | Missouri |
| 79 | Mildred Jeanne Johnson | 0 | Daughter | — | Missouri |
| 80 | Riley Mathis | 31 | Head | Orderly | Missouri |
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)