RS
Robert Schmidt — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Hamilton-County, Ohio
Our Model Tree links this Robert Schmidt across the 1930 and 1940 US Censuses in Hamilton-County, Ohio (XGBoost, ~Confirmed) — first a son (b.~1920), then head of a 10-person household.
Age 20
b. ~1920
Male
Son
Born: Ohio
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Hamilton-County, Ohio |
| Surname | Schmidt |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Cincinnati City |
| 1935 Residence (County) | Hamilton |
| Additional Details | |
| Occupation | Upholstering |
| Class of Worker | OA |
| Hours Worked | 45 |
| Income (1939) | 3648 |
| Highest Grade | C 1 |
| 1935 Residence | Same place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Occupation | Upholstering |
| Township / Ward | Cincinnati City |
| Est. Birth Year | ~1920 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Shirley Schmidt | Daughter | — | 15 | ~1925 |
| William Schmidt | Son | — | 17 | ~1923 |
| Rosemary Schmidt | Daughter | — | 18 | ~1922 |
| Fred Schmidt | Head | — | 44 | ~1896 |
| Mary Schmidt | Daughter | — | 73 | ~1867 |
| Rose Schmidt | Spouse | — | 43 | ~1897 |
| Joan Schmidt | Daughter | — | 11 | ~1929 |
| Robert Schmidt | Son | — | 20 | ~1920 |
| Mary Schmidt | Daughter | — | 5 | ~1935 |
| Thomas Schmidt | Son | — | 5 | ~1935 |
Census Appearances
1930
Hamilton, Ohio
Son, age 9
Hamilton, Ohio · implied b. ~1921 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Schmidt |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
Hamilton-County, Ohio
Son, age 20
Hamilton-County, Ohio · implied b. ~1920 — 10 household members
| Surname | Schmidt |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Cincinnati City |
| 1935 Residence (County) | Hamilton |
| Occupation | Upholstering |
| Class of Worker | OA |
| Hours Worked | 45 |
| Income (1939) | 3648 |
| Highest Grade | C 1 |
| 1935 Residence | Same place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
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 Robert Schmidt across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Robert Schmidt
Son · 1940 · age 20 · b. ~1920 · Ohio
★ You are viewing this record
Sibling
William Schmidt
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Shirley Schmidt
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joan Schmidt
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Schmidt
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Schmidt
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rosemary Schmidt
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Schmidt
Sibling · 1940 · age 73
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 — Hamilton-County, Ohio
Open full size
1940 US Federal Census — Hamilton-County, Ohio
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-03187-00420)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | William Ironmonger | 44 | Head | Electrician | Ohio |
| 2 | Marie Ironmonger | 42 | Wife | — | Ohio |
| 3 | John Finnigan | 18 | Son | — | Ohio |
| 4 | Janet Ironmonger | 12 | Daughter | — | Ohio |
| 5 | Marcia Ironmonger | 8 | Daughter | — | Ohio |
| 6 | Fred Peterman | 70 | Father | — | Ohio |
| 7 | Fred W Schmidt | 44 | Head | Upholstering | Ohio |
| 8 | Rose M Schmidt | 43 | Wife | — | Ohio |
| 9 | Robert Schmidt THIS PERSON | 20 | Son | Upholstering | Ohio |
| 10 | Rosemary Schmidt | 18 | Daughter | — | Ohio |
| 11 | William Schmidt | 17 | Son | — | Ohio |
| 12 | Shirley Schmidt | 15 | Daughter | — | Ohio |
| 13 | Joan Schmidt | 11 | Daughter | — | Ohio |
| 14 | Thomas Schmidt | 5 | Son | — | Ohio |
| 15 | Mary V Schmidt | 5 | Daughter | — | Ohio |
| 16 | Mary Schmidt | 73 | Daughter | — | Germany |
| 17 | Willie Lewis | 49 | Head | Laborer | Mississippi |
| 18 | Fannie Lewis | 49 | Wife | — | Kentucky |
| 19 | Raymond Rhodes | 29 | Head | Homework | Ohio |
| 20 | Ada Lou Rhodes | 24 | Wife | — | West Virginia |
| 21 | Richard Rhodes | 5 | Son | — | West Virginia |
| 22 | Lillian Nicholas | 65 | Boarder | — | Ohio |
| 23 | Sam Harrison | 48 | Head | Shop Work | S. Carolina |
| 24 | Sarah B Harrison | 47 | Wife | — | S. Carolina |
| 25 | Jessie Johnson | 50 | Head | Chauffeur | Kentucky |
| 26 | Katherine Johnson | 29 | Wife | — | Kentucky |
| 27 | James Johnson | 7 | Son | — | Ohio |
| 28 | William Quarley | 48 | Head | Porter | Kentucky |
| 29 | Lucy Bell Quarley | 38 | Wife | — | Kentucky |
| 30 | John Watkins | 21 | Head | Laborer | Ohio |
| 31 | Juanita Watkins | 21 | Wife | — | Ohio |
| 32 | Mary Ellen Watkins | 4 | Daughter | — | Ohio |
| 33 | Jane Watkins | 1 | Daughter | — | Ohio |
| 34 | John Jr Watkins | 0 | Son | — | Ohio |
| 35 | John Watkins | 55 | Father | Laborer | Kentucky |
| 36 | Francis Mccullough | 30 | Head | Garage Man | S. Carolina |
| 37 | Lucille Mccullough | 30 | Wife | — | Ohio |
| 38 | Francis Jr Mccullough | 15 | Son | — | Ohio |
| 39 | Donald Mccullough | 13 | Son | — | Ohio |
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)