JF
John Fischer — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Carroll-County, Iowa
Our Model Tree links this John Fischer across the 1930 and 1940 US Censuses in Carroll-County, Iowa (XGBoost, ~Confirmed) — first a son (b.~1917), then head of a 11-person household.
Age 23
b. ~1917
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Carroll-County, Iowa |
| Surname | Fischer |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Eden Twp. |
| 1935 Residence (County) | Carroll |
| Additional Details | |
| Occupation | Salesman |
| Industry | Retail Hardware |
| Class of Worker | PW |
| Income (1939) | 500 |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Salesman |
| Township / Ward | Eden Twp |
| Est. Birth Year | ~1917 |
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.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Dorothy Fischer | Daughter | — | 4 | ~1936 |
| Hilda Fischer | Daughter | — | 22 | ~1918 |
| Mary Fischer | Daughter | — | 11 | ~1929 |
| Rita Fischer | Daughter | — | 9 | ~1931 |
| Kathryn Fischer | Daughter | — | 13 | ~1927 |
| Frank Fischer | Head | — | 47 | ~1893 |
| John Fischer | Son | — | 23 | ~1917 |
| Leonard Fischer | Son | — | 16 | ~1924 |
| Otmer Fischer | Son | — | 17 | ~1923 |
| Clarence Fischer | Son | — | 19 | ~1921 |
| Kathryn Fischer | Spouse | — | 47 | ~1893 |
Census Appearances
1930
Carroll, Iowa
Son, age 12
Carroll, Iowa · implied b. ~1918 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Fisher |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Germany |
| Mother's Birthplace | Iowa |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Carroll-County, Iowa
Son, age 23
Carroll-County, Iowa · implied b. ~1917 — 11 household members
| Surname | Fischer |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Eden Twp. |
| 1935 Residence (County) | Carroll |
| Occupation | Salesman |
| Industry | Retail Hardware |
| Class of Worker | PW |
| Income (1939) | 500 |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| 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 Fischer across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Fischer
Son · 1940 · age 23 · b. ~1917 · Iowa
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Sibling
Rita Fischer
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Hilda Fischer
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Otmer Fischer
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Clarence Fischer
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Leonard Fischer
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Fischer
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Fischer
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Kathryn Fischer
Sibling · 1940 · age 13
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 — Carroll-County, Iowa
Open full size
1940 US Federal Census — Carroll-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01144-00755)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Frank Stevens | 45 | Head | Operator | Iowa |
| 42 | Louise Stevens | 42 | Wife | — | Iowa |
| 43 | Joseph Stevens | 19 | Son | Helper | Iowa |
| 44 | Delores Stevens | 17 | Daughter | — | Iowa |
| 45 | Donald Stevens | 12 | Son | — | Iowa |
| 46 | Gladys Stevens | 10 | Daughter | — | Iowa |
| 47 | Marvin Stevens | 8 | Son | — | Iowa |
| 48 | Melvin Stevens | 8 | Son | — | Iowa |
| 49 | Frank Fischer | 47 | Head | Operator | Germany |
| 50 | Kathryn Fischer | 47 | Wife | — | Iowa |
| 51 | John Fischer THIS PERSON | 23 | Son | Salesman | Iowa |
| 52 | Hilda Fischer | 22 | Daughter | — | Iowa |
| 53 | Clarence Fischer | 19 | Son | Helper | Iowa |
| 54 | Otmer Fischer | 17 | Son | Helper | Iowa |
| 55 | Leonard Fischer | 16 | Son | Helper | Iowa |
| 56 | Kathryn Fischer | 13 | Daughter | — | Iowa |
| 57 | Mary Fischer | 11 | Daughter | — | Iowa |
| 58 | Rita Fischer | 9 | Daughter | — | Iowa |
| 59 | Dorothy Mae Fischer | 4 | Daughter | — | Iowa |
| 60 | Joseph Langel | 36 | Head | Operator | Iowa |
| 61 | Mary Langel | 36 | Wife | — | Iowa |
| 62 | Yvonne Langel | 9 | Daughter | — | Iowa |
| 63 | Bernita Langel | 7 | Daughter | — | Iowa |
| 64 | Lavern Langel | 5 | Son | — | Iowa |
| 65 | Edna Langel | 3 | Daughter | — | Iowa |
| 66 | Louis Dopheide | 39 | Head | Operator | Iowa |
| 67 | Kathryn Dopheide | 24 | Wife | — | Iowa |
| 68 | Larry Dopheide | 2 | Son | — | Iowa |
| 69 | Anita Uhlenkamp | 13 | Niece | — | Iowa |
| 70 | Edna Mae Uhlenkamp | 11 | Niece | — | Iowa |
| 71 | Joe Heithoff | 51 | Head | Operator | Nebraska |
| 72 | Martha Heithoff | 45 | Wife | — | Iowa |
| 73 | Irene Heithoff | 24 | Daughter | — | Iowa |
| 74 | Linus Heithoff | 22 | Son | Helper | Iowa |
| 75 | Marvin Heithoff | 20 | Son | Helper | Iowa |
| 76 | Eugene Heithoff | 19 | Son | Helper | Iowa |
| 77 | Virgil Heithoff | 16 | Son | Helper | Iowa |
| 78 | Rita Heithoff | 15 | Daughter | — | Iowa |
| 79 | Edna Heithoff | 13 | Daughter | — | Iowa |
| 80 | Ruth Heithoff | 11 | Daughter | — | Iowa |
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)