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Mary Mayer — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Vanderburgh-County, Indiana
Our Model Tree links this Mary Mayer across the 1930 and 1940 US Censuses in Vanderburgh-County, Indiana (XGBoost, ~Confirmed) — first a daughter (b.~1928), then head of a 6-person household.
Age 12
b. ~1928
Female
Daughter
Born: Indiana
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Vanderburgh-County, Indiana |
| Surname | Mayer |
| Given Name | Mary L. |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Vanderburgh |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | 5 |
| 1935 Residence | Indiana |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Township / Ward | Perry Township |
| Est. Birth Year | ~1928 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Thomas Mayer | Daughter | — | 1 | ~1939 |
| Mary Mayer | Daughter | — | 12 | ~1928 |
| Delores Mayer | Daughter | — | 4 | ~1936 |
| Urban Mayer | Head | — | 40 | ~1900 |
| Richard Mayer | Son | — | 9 | ~1931 |
| Irene Mayer | Spouse | — | 38 | ~1902 |
Census Appearances
1930
Vanderburgh, Indiana
Daughter, age 1
Vanderburgh, Indiana · implied b. ~1929 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Meyer |
| Given Name | Mary L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Indiana |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1940
Vanderburgh-County, Indiana
Daughter, age 12
Vanderburgh-County, Indiana · implied b. ~1928 — 6 household members
| Surname | Mayer |
| Given Name | Mary L. |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Vanderburgh |
| Income (1939) | 0 |
| Highest Grade | 5 |
| 1935 Residence | Indiana |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
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 Mayer across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Mayer
Daughter · 1940 · age 12 · b. ~1928 · Indiana
★ You are viewing this record
Sibling
Thomas Mayer
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Delores Mayer
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Mayer
Sibling · 1940 · age 9
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 — Vanderburgh-County, Indiana
Open full size
1940 US Federal Census — Vanderburgh-County, Indiana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01101-00611)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Esther Stamler | 33 | daughter | — | Indiana |
| 2 | Fred E. Littner | 41 | head | Salesman | Indiana |
| 3 | Esther K. Littner | 37 | wife | — | Indiana |
| 4 | Frederick A. Littner | 17 | son | New Worker | Indiana |
| 5 | Edward H. Littner | 12 | son | — | Indiana |
| 6 | Marjorie H. Littner | 10 | daughter | — | Indiana |
| 7 | Urban L. Mayer | 40 | head | Stationary Fireman | Indiana |
| 8 | Irene M. Mayer | 38 | wife | — | Indiana |
| 9 | Mary L. Mayer THIS PERSON | 12 | daughter | — | Indiana |
| 10 | Richard J. Mayer | 9 | son | — | Indiana |
| 11 | Delores M. Mayer | 4 | daughter | — | Indiana |
| 12 | Thomas J. Mayer | 1 | daughter | — | Indiana |
| 13 | Joe B. Caldemeyer | 63 | head | Farmer | Indiana |
| 14 | Christina Caldemeyer | 61 | wife | — | Indiana |
| 15 | Fred Caldemeyer | 34 | son | Farmer | Indiana |
| 16 | Henry Grave | 67 | lodger | Farm Laborer | Missouri |
| 17 | Charlie Smith | 21 | lodger | Farm Laborer | Kentucky |
| 18 | Arthur E. Wilson | 33 | head | Laborer | Indiana |
| 19 | Josephine E. Wilson | 33 | wife | — | Indiana |
| 20 | Dorothy R. Wilson | 11 | daughter | — | Indiana |
| 21 | Geo. Schmitz | 70 | head | Farmer | Germany |
| 22 | Mollie Schmitz | 68 | wife | — | Germany |
| 23 | Walter H. Schmitz | 30 | son | Concrete Finisher | Indiana |
| 24 | Dan Killinger | 47 | head | Molder | Indiana |
| 25 | George W. Koge | 58 | head | Laborer | Indiana |
| 26 | Carl H. Felthaus | 31 | head | Stenographer | Indiana |
| 27 | Irene M. Felthaus | 28 | wife | — | Indiana |
| 28 | Robert E. Felthaus | 7 | son | — | Indiana |
| 29 | Donald E. Felthaus | 5 | son | — | Indiana |
| 30 | Kathleen A. Felthaus | 1 | daughter | — | Indiana |
| 31 | Gilbert Aldridge | 41 | head | Inspector | Kentucky |
| 32 | Esther M. Aldridge | 38 | wife | — | Indiana |
| 33 | Gilbert J. Aldridge | 15 | son | — | Indiana |
| 34 | Virginia L. Aldridge | 10 | daughter | — | Illinois |
| 35 | Henry H. Felthaus | 69 | father-in-law | Farmer | Indiana |
| 36 | Alice M. Felthaus | 22 | sister-in-law | Operator | Indiana |
| 37 | Edward H. Plump | 46 | head | Farmer | Indiana |
| 38 | Stella Plump | 44 | wife | — | Kentucky |
| 39 | Virginia Plump | 12 | daughter | — | Indiana |
| 40 | Wm. C. Schmuck | 54 | head | Farmer | Indiana |
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)