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John Schmitt — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Black-Hawk-County, Iowa
Our Model Tree links this John Schmitt across the 1920, 1930 and 1940 US Censuses in Black-Hawk-County, Iowa (XGBoost, ~Confirmed) — first a head (b.~1873), then head of a 7-person household.
Age 67
b. ~1873
Male
Head
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Black-Hawk-County, Iowa |
| Surname | Schmitt |
| Given Name | John R |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 67 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Barclay Twp |
| 1935 Residence (County) | Black Hawk |
| Additional Details | |
| Occupation | Gen Farm |
| Industry | E |
| Class of Worker | 0 |
| Highest Grade | No 8 |
| 1935 Residence | 60 |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Gen Farm |
| Township / Ward | Barclay Twp |
| Est. Birth Year | ~1873 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Ray Boots | Other | — | 40 | ~1900 |
| Charles Schmitt | Son | — | 43 | ~1897 |
| Richard Schmitt | Other | — | 4 | ~1936 |
| John Schmitt | Head | — | 67 | ~1873 |
| Robert Schmitt | Other | — | 6 | ~1934 |
| Rosalie Schmitt | Other | — | 2 | ~1938 |
| Kate Mehler | Other | — | 55 | ~1885 |
Census Appearances
1920
Black Hawk, …
Head, age 47
Black Hawk, Iowa · implied b. ~1873 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Schmitt |
| Given Name | John R. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Iowa |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Occupation | Farmer |
| Industry | Home Farm |
| Class of Worker | oa |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | O |
| Home Free/Mortgaged | M |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Black Hawk, …
Head, age 57
Black Hawk, Iowa · implied b. ~1873 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Schmitt |
| Given Name | John R |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 57 |
| Marital Status | Married |
| Birthplace | Iowa |
| Age at First Marriage | 23 |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Occupation | Farmer |
| Industry | General farming |
| Class of Worker | E |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | $6000 |
| Radio Set | R |
| Veteran | No |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Black-Hawk-County, Iowa
Head, age 67
Black-Hawk-County, Iowa · implied b. ~1873 — 7 household members
| Surname | Schmitt |
| Given Name | John R |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 67 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Barclay Twp |
| 1935 Residence (County) | Black Hawk |
| Occupation | Gen Farm |
| Industry | E |
| Class of Worker | 0 |
| Highest Grade | No 8 |
| 1935 Residence | 60 |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
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 John Schmitt across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Schmitt
Head · 1940 · age 67 · b. ~1873 · Iowa
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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 — Black-Hawk-County, Iowa
Open full size
1940 US Federal Census — Black-Hawk-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01139-00012)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mary Schmitt | 47 | Wife | — | So Dak |
| 2 | Bernard Schmitt | 25 | Son | — | Iowa |
| 3 | Rose Mary Schmitt | 19 | Daughter | — | Iowa |
| 4 | Marguerite Schmitt | 17 | Daughter | — | Iowa |
| 5 | John R Schmitt THIS PERSON | 67 | Head | Gen Farm | Iowa |
| 6 | Charles Schmitt | 43 | Son | Farm | Iowa |
| 7 | Robert J Schmitt | 6 | Grandson | — | Iowa |
| 8 | Richard Schmitt | 4 | Grandson | — | Iowa |
| 9 | Rosalie Schmitt | 2 | Granddaughter | — | Iowa |
| 10 | Ray Boots | 40 | Hired hand | Farm | Missouri |
| 11 | Kate Mehler | 55 | Hired Girl | Housekeeping | Iowa |
| 12 | John W Morrison | 53 | Head | Farm | Iowa |
| 13 | Rebba Morrison | 54 | Wife | — | Iowa |
| 14 | Alfred Morrison | 25 | Son | Farm | Iowa |
| 15 | Paul Morrison | 18 | Son | Farm | Iowa |
| 16 | Mark Morrison | 16 | Son | — | Iowa |
| 17 | Matt Rice | 44 | Head | Farm | Iowa |
| 18 | Lavene Rice | 44 | Wife | — | Iowa |
| 19 | Clair Rice | 22 | Son | — | Iowa |
| 20 | Anna Rice | 20 | Daughter | — | Iowa |
| 21 | Claude Rice | 18 | Son | Farm | Iowa |
| 22 | Norbert Rice | 16 | Son | Farm | Iowa |
| 23 | Lyle Rice | 14 | Son | Farm | Iowa |
| 24 | Roger Rice | 11 | Son | — | Iowa |
| 25 | Leon Rice | 9 | Son | — | Iowa |
| 26 | James Rice | 7 | Son | — | Iowa |
| 27 | Matt Ortner | 55 | Head | Farm | Iowa |
| 28 | Margaret Ortner | 43 | Wife | — | Iowa |
| 29 | Dorothy Ortner | 19 | Daughter | — | Iowa |
| 30 | Kathleen Ortner | 17 | Daughter | — | Iowa |
| 31 | John Ortner | 15 | Son | — | Iowa |
| 32 | Dolores Ortner | 10 | Daughter | — | Iowa |
| 33 | Richard Ortner | 8 | Son | — | Iowa |
| 34 | Helen Ortner | 7 | Daughter | — | Iowa |
| 35 | Mary Ortner | 5 | Daughter | — | Iowa |
| 36 | Leonard Blerschiel | 43 | Head | St Farm | Iowa |
| 37 | Margaret Blerschiel | 39 | Wife | — | Ill |
| 38 | William Blerschiel | 17 | Son | Farm | Iowa |
| 39 | Mildred Blerschiel | 15 | Daughter | — | Iowa |
| 40 | Leroy Blerschiel | 13 | Son | — | Iowa |
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)