FZ
Fred Zimmerman — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Delaware-County, Iowa
Our Model Tree links this Fred Zimmerman across the 1920, 1930 and 1940 US Censuses in Delaware-County, Iowa (XGBoost, ~Confirmed) — first a head (b.~1879), then head of a 8-person household.
Age 61
b. ~1879
Male
Head
Born: Switzerland
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Delaware-County, Iowa |
| Surname | Zimmerman |
| Given Name | Fred |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 61 |
| Marital Status | Widowed |
| Birthplace | Switzerland |
| 1935 Residence (City) | Hazel Green Twp |
| 1935 Residence (County) | Delaware |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | farming |
| Industry | farm |
| Class of Worker | OA |
| Hours Worked | 70 |
| Income (1939) | 0 |
| Highest Grade | 0 |
| 1935 Residence | Same place |
| Birth Country | Switzerland |
| Birthplace (normalized) | switzerland |
| Occupation | Farming |
| Township / Ward | Hazel Green Twp |
| Est. Birth Year | ~1879 |
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 |
|---|---|---|---|---|
| Verna Zimmerman | Daughter | — | 20 | ~1920 |
| Donald Zimmerman | Son | — | 25 | ~1915 |
| Nancy Zimmerman | Daughter | — | 6 | ~1934 |
| Frederick Zimmerman | Son | — | 27 | ~1913 |
| Doris Zimmerman | Daughter | — | 16 | ~1924 |
| Carol Zimmerman | Son | — | 18 | ~1922 |
| Elsie Zimmerman | Spouse | — | 51 | ~1889 |
| Fred Zimmerman | Head | — | 61 | ~1879 |
Census Appearances
1920
Delaware, Iowa
Head, age 41
Delaware, Iowa · implied b. ~1879 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Zimmerman |
| Given Name | Fred |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Switzerland |
| Year of Immigration | 1880 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Switzerland |
| Mother's Birthplace | Switzerland |
| Occupation | Farmer |
| Industry | General Farm |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | German |
| Home Owned/Rented | O |
| Home Free/Mortgaged | M |
| Birth Country | Switzerland |
| Year of Naturalization | 1885 |
| Birthplace (normalized) | switzerland |
1930
Delaware, Iowa
Head, age 51
Delaware, Iowa · implied b. ~1879 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Zimmerman |
| Given Name | Fred |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | Switzerland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1880 |
| Age at First Marriage | 29 |
| Father's Birthplace | Switzerland |
| Mother's Birthplace | Switzerland |
| Occupation | Farmer |
| Industry | General Farm |
| Class of Worker | O |
| Can Read/Write | Yes |
| Mother Tongue | German |
| Home Owned/Rented | R |
| Birth Country | Switzerland |
| Birthplace (normalized) | switzerland |
1940
Delaware-County, Iowa
Head, age 61
Delaware-County, Iowa · implied b. ~1879 — 8 household members
| Surname | Zimmerman |
| Given Name | Fred |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 61 |
| Marital Status | Widowed |
| Birthplace | Switzerland |
| 1935 Residence (City) | Hazel Green Twp |
| 1935 Residence (County) | Delaware |
| Naturalization Status | Naturalized |
| Occupation | farming |
| Industry | farm |
| Class of Worker | OA |
| Hours Worked | 70 |
| Income (1939) | 0 |
| Highest Grade | 0 |
| 1935 Residence | Same place |
| Birth Country | Switzerland |
| Birthplace (normalized) | switzerland |
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 61 · b. ~1879 · 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 — Delaware-County, Iowa
Open full size
1940 US Federal Census — Delaware-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01155-00323)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Merritt J. Haigh | 44 | Head | Farming | Iowa |
| 2 | Mildred Haigh | 32 | Wife | Housewife | Iowa |
| 3 | Esther Haigh | 9 | Daughter | — | Iowa |
| 4 | Nila Haigh | 6 | Daughter | — | Iowa |
| 5 | John Haigh | 3 | Son | — | Iowa |
| 6 | Joseph Haigh | 2 | Son | — | Iowa |
| 7 | Hershel Sowash | 40 | Hired hand | Farm Hand | Iowa |
| 8 | Alton O. Henderson | 43 | Head | Farming | Iowa |
| 9 | Dora Henderson | 39 | Wife | Housewife | Iowa |
| 10 | Ray Jr. Mack | 22 | Hired hand | Farm Hand | Kansas |
| 11 | Fred Zimmerman THIS PERSON | 61 | Head | Farming | Switzerland |
| 12 | Elsie Zimmerman | 51 | Wife | Housewife | Iowa |
| 13 | Frederick Zimmerman | 27 | Son | Road Maintainer | Iowa |
| 14 | Donald Zimmerman | 25 | Son | Farming | Iowa |
| 15 | Verna Zimmerman | 20 | Daughter | House Work | Iowa |
| 16 | Carol Zimmerman | 18 | Son | Farming | Iowa |
| 17 | Doris Zimmerman | 16 | Daughter | School Student | Iowa |
| 18 | Nancy Ann Zimmerman | 6 | Daughter | — | Iowa |
| 19 | James Duggan | 56 | Head | Farming | Iowa |
| 20 | Anna Duggan | 53 | Wife | House Wife | Iowa |
| 21 | Raymond Duggan | 22 | Son | Farming | Iowa |
| 22 | Laverne Duggan | 12 | Son | School Student | Iowa |
| 23 | Bernard Duggan | 9 | Son | — | Iowa |
| 24 | Gert Chenoweth | 52 | Hired hand | Interior Decorator | Iowa |
| 25 | Victor L. Wilson | 54 | Head | Carpenter | Iowa |
| 26 | Martha Wilson | 51 | Wife | Housewife | Iowa |
| 27 | Lloyd Wilson | 30 | Son | Farming | Iowa |
| 28 | Lucile Wilson | 27 | Daughter | School Teacher | Iowa |
| 29 | Victor Wilson | 22 | Son | Farming | Iowa |
| 30 | Donald Wilson | 18 | Son | Farming | Iowa |
| 31 | Doris Wilson | 16 | Daughter | School Student | Iowa |
| 32 | Marie Wilson | 12 | Daughter | — | Iowa |
| 33 | Milton Wilson | 8 | Son | — | Iowa |
| 34 | Elmer D. Mcelmeel | 39 | Head | Farming | Iowa |
| 35 | Mary Mcelmeel | 31 | Wife | House Wife | Iowa |
| 36 | Joyce Marie Mcelmeel | 5 | Daughter | — | Iowa |
| 37 | James Cragin | 32 | Head | Farming | Iowa |
| 38 | Leo Cragin | 35 | Son | Farming | Iowa |
| 39 | George J. Chrystal | 50 | Head | Farming | Iowa |
| 40 | Hazel Chrystal | 48 | Wife | House Work | 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)