JS
John Schmidt — 1940 US Census Record
Model Tree available1940 United States Federal Census · Dickinson-County, Iowa
Our Model Tree links this John Schmidt across the 1920, 1930 and 1940 US Censuses in Dickinson-County, Iowa (XGBoost, ~Confirmed), with identified parents Otto & Minnie — first a head (b.~1899), then head of a 7-person household.
Age 41
b. ~1899
Male
Head
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Dickinson-County, Iowa |
| Surname | Schmidt |
| Given Name | John D. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Westport Township |
| 1935 Residence (County) | Dickinson |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 72 |
| Income (1939) | 0 |
| Highest Grade | 8 |
| 1935 Residence | Same House |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Farmer |
| Township / Ward | Westport Township |
| Est. Birth Year | ~1899 |
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 |
|---|---|---|---|---|
| John Schmidt | Head | — | 41 | ~1899 |
| Richard Schmidt | Son | — | 10 | ~1930 |
| Walter Schmidt | Son | — | 7 | ~1933 |
| Robert Schmidt | Son | — | 4 | ~1936 |
| Dale Schmidt | Son | — | 12 | ~1928 |
| Alfred Schmidt | Son | — | 14 | ~1926 |
| Mary Schmidt | Spouse | — | 40 | ~1900 |
Census Appearances
1920
Dickinson, Iowa
Son, age 20
Dickinson, Iowa · implied b. ~1900 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Schmidt |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Germany |
| Occupation | Farm laborer |
| Industry | Home farm |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | German |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Dickinson, Iowa
Head, age 31
Dickinson, Iowa · implied b. ~1899 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Schmidt |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Iowa |
| Age at First Marriage | 23 |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Germany |
| Occupation | Farmer |
| Industry | General Farm |
| Class of Worker | O |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Dickinson-County, Iowa
Head, age 41
Dickinson-County, Iowa · implied b. ~1899 — 7 household members
| Surname | Schmidt |
| Given Name | John D. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Westport Township |
| 1935 Residence (County) | Dickinson |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 72 |
| Income (1939) | 0 |
| Highest Grade | 8 |
| 1935 Residence | Same House |
| 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 Schmidt across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Otto Schmidt (~0.92 confidence) and mother Minnie Schmidt (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Otto Schmidt
b. ~1865
Source father
● Household
· direct · ~0.92
Mother
Minnie Schmidt
b. ~1865
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Schmidt
Head · 1940 · age 41 · b. ~1899 · Iowa
★ 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 — Dickinson-County, Iowa
Open full size
1940 US Federal Census — Dickinson-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01157-00388)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Donald E. Nielsen | 14 | Son | — | Iowa |
| 2 | Viola M. Nielsen | 12 | Daughter | — | Iowa |
| 3 | Elmer L. Nielsen | 3 | Son | — | Iowa |
| 4 | George W. Dirksen | 28 | Lodger | Farm Laborer | Iowa |
| 5 | Siebel B. Meyer | 46 | Head | Farmer | Iowa |
| 6 | Grace Meyer | 35 | Wife | — | Iowa |
| 7 | John D. Schmidt THIS PERSON | 41 | Head | Farmer | Iowa |
| 8 | Mary Schmidt | 40 | Wife | — | Iowa |
| 9 | Alfred M. Schmidt | 14 | Son | — | Iowa |
| 10 | Dale E. Schmidt | 12 | Son | — | Iowa |
| 11 | Richard D. Schmidt | 10 | Son | — | Iowa |
| 12 | Walter J. Schmidt | 7 | Son | — | Iowa |
| 13 | Robert J. Schmidt | 4 | Son | — | Iowa |
| 14 | John B. Dirksen | 26 | Head | Farmer | Iowa |
| 15 | Rena Dirksen | 21 | Wife | — | Iowa |
| 16 | Claus Wolthuis | 56 | Head | Farmer | Germany |
| 17 | Vena Wolthuis | 51 | Wife | — | Iowa |
| 18 | Clara Wolthuis | 19 | Daughter | — | Iowa |
| 19 | George Wolthuis | 15 | Son | — | Iowa |
| 20 | Pauline Wolthuis | 13 | Daughter | — | Iowa |
| 21 | B. J. Dykstra | 62 | Head | Farmer | Holland |
| 22 | Marie Dykstra | 27 | Daughter | Housework | South Dakota |
| 23 | Bernard E. Dykstra | 19 | Son | Farm Laborer | South Dakota |
| 24 | Iven Nebben | 47 | Head | Farmer | Iowa |
| 25 | Ethel Nebben | 33 | Wife | — | North Dakota |
| 26 | Doris Ann Nebben | 1 | Daughter | — | Iowa |
| 27 | Henry Schroder | 59 | Head | Farmer | Germany |
| 28 | Vena Schroder | 54 | Wife | — | Germany |
| 29 | Ernest W. Schroder | 21 | Son | Farm Laborer | Iowa |
| 30 | Helen E. Schroder | 19 | Daughter | Housework | Iowa |
| 31 | Arthur F. Schroder | 15 | Son | Farm Laborer | Iowa |
| 32 | Leonard D. Hertog | 26 | Head | Farmer | Holland |
| 33 | Lena Hertog | 25 | Wife | — | Holland |
| 34 | Jennie Ann Hertog | 2 | Daughter | — | Iowa |
| 35 | H. W. Ommen | 69 | Head | Farmer | Iowa |
| 36 | Bessie J. Ommen | 64 | Wife | — | Iowa |
| 37 | William W. Ommen | 26 | Son | Farmer | Iowa |
| 38 | Willie J. Stovin | 26 | Head | Farmer | Iowa |
| 39 | Philis L. Stovin | 19 | Wife | — | Iowa |
| 40 | W. A. Costill | 72 | Head | Farm Laborer | Minnesota |
Pedigree Summary
John
Gen 1 · 2 parents
~0.92
Max depth 4 (1900–1950 window)
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)