FZ
Fred Zimmerman — 1940 US Census Record
Model Tree available1940 United States Federal Census · Scott-County, Iowa
Our Model Tree links this Fred Zimmerman across the 1920, 1930 and 1940 US Censuses in Scott-County, Iowa (XGBoost, ~Confirmed), with identified parents Fred & Frederick — first a son (b.~1919), then head of a 5-person household.
Age 21
b. ~1919
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Scott-County, Iowa |
| Surname | Zimmerman |
| Given Name | Fred L |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Davenport |
| 1935 Residence (County) | Scott |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | C 3 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Davenport |
| Est. Birth Year | ~1919 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Fred | Age | Birth yr |
|---|---|---|---|---|
| Fred Zimmerman | Son | — | 21 | ~1919 |
| Fred Zimmerman | Head | — | 57 | ~1883 |
| Donald Zimmerman | Son | — | 20 | ~1920 |
| Robert Zimmerman | Son | — | 15 | ~1925 |
| Matilda Zimmerman | Spouse | — | 59 | ~1881 |
Census Appearances
1920
Scott, Iowa
Son, age 1
Scott, Iowa · implied b. ~1919 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Zimmerman |
| Given Name | Frederick Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Scott, Iowa
Son, age 11
Scott, Iowa · implied b. ~1919 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Zimmerman |
| Given Name | Frederick L. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Scott-County, Iowa
Son, age 21
Scott-County, Iowa · implied b. ~1919 — 5 household members
| Surname | Zimmerman |
| Given Name | Fred L |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Davenport |
| 1935 Residence (County) | Scott |
| Class of Worker | 0 |
| Highest Grade | C 3 |
| 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. Identified parents: father Fred Zimmerman (~0.92 confidence) and father Frederick Zimmerman (~0.92 confidence) and mother Matilda Zimmerman (~0.92 confidence) and mother Matilda Zimmerman (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Fred Zimmerman
b. ~1883
Source father
● Household
· direct · ~0.92
Father
Frederick Zimmerman
b. ~1884
Source father
● Household
· direct · ~0.92
Mother
Matilda Zimmerman
b. ~1881
Source mother
● Household
· direct · ~0.92
Mother
Matilda Zimmerman
b. ~1892
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Fred Zimmerman
Son · 1940 · age 21 · b. ~1919 · Iowa
★ You are viewing this record
Sibling
Donald Zimmerman
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Zimmerman
Sibling · 1940 · age 15
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 — Scott-County, Iowa
Open full size
1940 US Federal Census — Scott-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01203-00931)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Walker John Coper | 4 | Son | — | Iowa |
| 42 | Jane E Coper | 3 | Daughter | — | Iowa |
| 43 | Fred E Winston | 63 | Head | Conductor | Wisconsin |
| 44 | Eva Winston | 59 | Wife | — | Illinois |
| 45 | Hans J Michael | 57 | Head | Foreman | Germany |
| 46 | Othelia Michael | 57 | Wife | — | Norway |
| 47 | Vernon Michael | 22 | Son | Buyer | Iowa |
| 48 | John B Kiel | 65 | Head | Salesman | Iowa |
| 49 | Dora B Kiel | 65 | Wife | — | Iowa |
| 50 | Elmer G Nordstrom | 40 | Son-in-law | Credit Manager | Iowa |
| 51 | Eileen D Nordstrom | 40 | Daughter | — | Iowa |
| 52 | Henry Nennew | 35 | Head | Traffic Manager | Iowa |
| 53 | Martha Nennew | 33 | Wife | — | Iowa |
| 54 | Henry J Quinn | 43 | Head | Salesman | Michigan |
| 55 | Viola Quinn | 42 | Wife | — | Michigan |
| 56 | Viola D Quinn | 17 | Daughter | — | Michigan |
| 57 | John Quinn | 15 | Son | — | Michigan |
| 58 | Henry Quinn | 13 | Son | — | Michigan |
| 59 | Marilyn Quinn | 8 | Daughter | — | Michigan |
| 60 | Alvina Bischoff | 75 | Head | — | Iowa |
| 61 | Walter M Bischoff | 43 | Son | Bookkeeper | Iowa |
| 62 | Walter Lenkmann | 29 | Head | Office Manager | Iowa |
| 63 | Margaret Lenkmann | 29 | Wife | — | Iowa |
| 64 | John Lenkmann | 2 | Son | — | Iowa |
| 65 | Aloysius Hahn | 32 | Head | Recruiter | Minnesota |
| 66 | Reba Hahn | 28 | Wife | — | Minnesota |
| 67 | Beverly Hahn | 6 | Daughter | — | California |
| 68 | Adrian Hahn | 2 | Son | — | Washington |
| 69 | Gary Hahn | 0 | Son | — | Minnesota |
| 70 | Francis Scofield | 40 | Head | Salesman | Iowa |
| 71 | Nellie Scofield | 45 | Wife | — | Iowa |
| 72 | June Scofield | 19 | Daughter | Stenographer | Iowa |
| 73 | Joyce Scofield | 17 | Daughter | — | Iowa |
| 74 | Ethelyn Scofield | 13 | Daughter | — | Iowa |
| 75 | Elsie Scofield | 73 | Mother | — | England |
| 76 | Fred W Zimmerman | 57 | Head | Superintendent | Iowa |
| 77 | Matilda L Zimmerman | 59 | Wife | — | Iowa |
| 78 | Fred L Zimmerman THIS PERSON | 21 | Son | — | Iowa |
| 79 | Donald G Zimmerman | 20 | Son | Newsworker | Iowa |
| 80 | Robert L Zimmerman | 15 | Son | — | Iowa |
Pedigree Summary
Fred + 2 siblings
Gen 1 · 4 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)