FZ
Fred Zimmerman — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Allamakee-County, Iowa
Our Model Tree links this Fred Zimmerman across the 1920, 1930 and 1940 US Censuses in Allamakee-County, Iowa (XGBoost, ~Confirmed) — first a head (b.~1886), then head of a 8-person household.
Age 54
b. ~1886
Male
Head
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Allamakee-County, Iowa |
| Surname | Zimmerman |
| Given Name | Fred |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 54 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Center Township |
| 1935 Residence (County) | Allamakee |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | E |
| Hours Worked | 60 |
| Income (1939) | 0 |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Farmer |
| Township / Ward | Center Township |
| Est. Birth Year | ~1886 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Fred | Age | Birth yr |
|---|---|---|---|---|
| Mary Zimmerman | Daughter | — | 8 | ~1932 |
| Robert Handel | Other | — | 28 | ~1912 |
| Caroline Zimmerman | Other | — | 81 | ~1859 |
| Alfred Seivert | Other | — | 16 | ~1924 |
| Fred Zimmerman | Head | — | 54 | ~1886 |
| Wilma Zimmerman | Daughter | — | 5 | ~1935 |
| Marie Zimmerman | Spouse | — | 44 | ~1896 |
| Frederick Zimmerman | Son | — | 12 | ~1928 |
Census Appearances
1920
Allamakee, Iowa
Head, age 34
Allamakee, Iowa · implied b. ~1886 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Zimmerman |
| Given Name | Fred |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 34 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Occupation | farm operator |
| Industry | general farm |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | O |
| Home Free/Mortgaged | F |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Allamakee, Iowa
Head, age 44
Allamakee, Iowa · implied b. ~1886 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Zimmerman |
| Given Name | Fred G. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 44 |
| Marital Status | Married |
| Birthplace | Iowa |
| Age at First Marriage | 24 |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Occupation | Farmer |
| Industry | General Farm |
| Class of Worker | O |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Veteran | No |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Allamakee-County, Iowa
Head, age 54
Allamakee-County, Iowa · implied b. ~1886 — 8 household members
| Surname | Zimmerman |
| Given Name | Fred |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 54 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Center Township |
| 1935 Residence (County) | Allamakee |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | E |
| Hours Worked | 60 |
| Income (1939) | 0 |
| Highest Grade | No 6 |
| 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 Fred Zimmerman across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Fred Zimmerman
Head · 1940 · age 54 · b. ~1886 · 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 — Allamakee-County, Iowa
Open full size
1940 US Federal Census — Allamakee-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01136-00741)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Fred Zimmerman THIS PERSON | 54 | Head | Farmer | Iowa |
| 42 | Marie Zimmerman | 44 | Wife | — | Iowa |
| 43 | Frederick Zimmerman | 12 | Son | — | Iowa |
| 44 | Mary Zimmerman | 8 | Daughter | — | Iowa |
| 45 | Wilma Zimmerman | 5 | Daughter | — | Iowa |
| 46 | Alfred Seivert | 16 | Hired hand | Farmer | Iowa |
| 47 | Robert Handel | 28 | Hired hand | Farmer | Iowa |
| 48 | Caroline Zimmerman | 81 | Mother | — | Germany |
| 49 | Leslie Kernell | 44 | Head | Farmer | Iowa |
| 50 | Irene Kernell | 37 | Wife | — | Iowa |
| 51 | Kenneth Kernell | 15 | Son | — | Iowa |
| 52 | Willard Kernell | 13 | Son | — | Iowa |
| 53 | Leslie Kernell | 6 | Son | — | Iowa |
| 54 | Carl Halverson | 45 | Hired hand | Laborer | Iowa |
| 55 | Willard Sondry | 37 | Head | Farmer | Iowa |
| 56 | Alice Sondry | 35 | Wife | — | Iowa |
| 57 | Richard Sondry | 5 | Son | — | Iowa |
| 58 | Anna Sondry | 76 | Mother | — | Iowa |
| 59 | Donald Hammell | 19 | Hired hand | Laborer | Iowa |
| 60 | John L. Dahly | 73 | Head | Farmer | Iowa |
| 61 | Matilda Dahly | 58 | Wife | — | Wisconsin |
| 62 | Leslie Dahly | 34 | Son | Laborer | Iowa |
| 63 | Myrtle Dahly | 26 | Daughter | — | Iowa |
| 64 | Bernice Dahly | 19 | Daughter | — | Iowa |
| 65 | John O. Boyd | 36 | Head | Farmer | Missouri |
| 66 | Emma Boyd | 27 | Wife | — | South Dakota |
| 67 | Betty Ann Boyd | 3 | Daughter | — | Iowa |
| 68 | Mary Jane Boyd | 1 | Daughter | — | Iowa |
| 69 | Willard Lippe | 28 | Hired hand | Laborer | Iowa |
| 70 | Carl H. Seivert | 45 | Head | Laborer | Iowa |
| 71 | Lydia Seivert | 52 | Wife | — | Iowa |
| 72 | Milton Seivert | 13 | Son | — | Iowa |
| 73 | Anthony Q. Bouska | 29 | Head | Laborer | Iowa |
| 74 | Irma A. Bouska | 20 | Wife | — | Minnesota |
| 75 | Elizabeth Bouska | 3 | Daughter | — | Iowa |
| 76 | Franklin Bouska | 1 | Son | — | Iowa |
| 77 | Charles Schollhammer | 49 | Head | Farmer | Iowa |
| 78 | Elma Schollhammer | 44 | Wife | — | Iowa |
| 79 | Harlow Schollhammer | 19 | Son | Laborer | Iowa |
| 80 | Ralph Schollhammer | 15 | Son | Laborer | 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)