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Robert Zimmerman — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Sac-County, Iowa
Our Model Tree links this Robert Zimmerman across the 1930 and 1940 US Censuses in Sac-County, Iowa (XGBoost, ~Confirmed) — first a son (b.~1924), then head of a 13-person household.
Age 16
b. ~1924
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Sac-County, Iowa |
| Surname | Zimmerman |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Sac |
| Additional Details | |
| Occupation | Helper |
| Industry | Retail Bakery |
| Class of Worker | PW |
| Hours Worked | 36 |
| Income (1939) | 156 |
| Highest Grade | No 4 |
| 1935 Residence | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Helper |
| Township / Ward | Sac City |
| Est. Birth Year | ~1924 |
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.
13 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Florence Zimmerman | Daughter | — | 12 | ~1928 |
| Pearl Zimmerman | Daughter | — | 17 | ~1923 |
| Kenneth Zimmerman | Son | — | 8 | ~1932 |
| Herbert Zimmerman | Head | — | 40 | ~1900 |
| Jack Zimmerman | Son | — | 5 | ~1935 |
| Mary Zimmerman | Daughter | — | 2 | ~1938 |
| Lois Zimmerman | Daughter | — | 4 | ~1936 |
| Donald Zimmerman | Son | — | 18 | ~1922 |
| Beula Zimmerman | Daughter | — | 15 | ~1925 |
| Robert Zimmerman | Son | — | 16 | ~1924 |
| Clifford Zimmerman | Son | — | 10 | ~1930 |
| Marie Zimmerman | Spouse | — | 36 | ~1904 |
| Ruth Zimmerman | Daughter | — | 7 | ~1933 |
Census Appearances
1930
Sac, Iowa
Son, age 6
Sac, Iowa · implied b. ~1924 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Zimmerman |
| Given Name | Robert G |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Illinois |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Sac-County, Iowa
Son, age 16
Sac-County, Iowa · implied b. ~1924 — 13 household members
| Surname | Zimmerman |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Sac |
| Occupation | Helper |
| Industry | Retail Bakery |
| Class of Worker | PW |
| Hours Worked | 36 |
| Income (1939) | 156 |
| Highest Grade | No 4 |
| 1935 Residence | Iowa |
| 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 Robert Zimmerman across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Robert Zimmerman
Son · 1940 · age 16 · b. ~1924 · Iowa
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Sibling
Lois Zimmerman
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Beula Zimmerman
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Pearl Zimmerman
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Donald Zimmerman
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ruth Zimmerman
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Clifford Zimmerman
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jack Zimmerman
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Florence Zimmerman
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Zimmerman
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Kenneth Zimmerman
Sibling · 1940 · age 8
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 — Sac-County, Iowa
Open full size
1940 US Federal Census — Sac-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01201-00581)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Ella Cafferty | 79 | Mother | — | Iowa |
| 2 | Dickey Beck | 11 | Lodger | — | Iowa |
| 3 | Dora Harvey | 71 | Lodger | — | Iowa |
| 4 | Dwight Finck | 29 | Head | Manager | Iowa |
| 5 | Mary Finck | 23 | Wife | Bookkeeper | Iowa |
| 6 | John Dew | 43 | Head | Laborer | Tennessee |
| 7 | Mabel Dew | 37 | Wife | — | Iowa |
| 8 | Bethel Dew | 16 | Daughter | — | Iowa |
| 9 | Dale Dew | 12 | Son | — | Iowa |
| 10 | Larry Dew | 2 | Son | — | Iowa |
| 11 | F. S. Lytle | 64 | Head | Carpenter | Illinois |
| 12 | Mattie Lytle | 62 | Wife | — | Illinois |
| 13 | Doyle Lytle | 27 | Son | Carpenter | Illinois |
| 14 | Gladys Lytle | 19 | Daughter-in-law | Janitor | Iowa |
| 15 | Darwin Lytle | 1 | Grandson | — | Iowa |
| 16 | Herbert Zimmerman | 40 | Head | Laborer | Iowa |
| 17 | Marie Zimmerman | 36 | Wife | — | Illinois |
| 18 | Donald Zimmerman | 18 | Son | Helper | Iowa |
| 19 | Pearl Zimmerman | 17 | Daughter | Housework | Iowa |
| 20 | Robert Zimmerman THIS PERSON | 16 | Son | Helper | Iowa |
| 21 | Beula Zimmerman | 15 | Daughter | — | Iowa |
| 22 | Florence Zimmerman | 12 | Daughter | — | Iowa |
| 23 | Clifford Zimmerman | 10 | Son | — | Iowa |
| 24 | Kenneth Zimmerman | 8 | Son | — | Iowa |
| 25 | Ruth Zimmerman | 7 | Daughter | — | Iowa |
| 26 | Jack Zimmerman | 5 | Son | — | Iowa |
| 27 | Lois Zimmerman | 4 | Daughter | — | Iowa |
| 28 | Mary Zimmerman | 2 | Daughter | — | Iowa |
| 29 | Preston Stout | 40 | Head | Carpenter | Iowa |
| 30 | Louise Stout | 37 | Wife | — | Iowa |
| 31 | Elnora Stout | 15 | Daughter | — | Iowa |
| 32 | Preston Jr. Stout | 9 | Son | — | Iowa |
| 33 | Harlan Stout | 6 | Son | — | Iowa |
| 34 | Minnie A. Carlton | 46 | Head | Chicken Picker | Iowa |
| 35 | Mildred Carlton | 22 | Daughter | Typist | Iowa |
| 36 | Darwin Carlton | 16 | Son | — | Iowa |
| 37 | Frederick Henson | 26 | Head | Truck Driver | Illinois |
| 38 | Ruell Henson | 23 | Wife | — | Iowa |
| 39 | Peggy Ray Henson | 1 | Daughter | — | Iowa |
| 40 | William Flesch | 68 | Head | Laborer | Illinois |
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)