RP
Robert Pierce — 1940 US Census Record
Model Tree available1940 United States Federal Census · Chickasaw-County, Iowa
Our Model Tree links this Robert Pierce across the 1920, 1930 and 1940 US Censuses in Chickasaw-County, Iowa (XGBoost, ~Confirmed), with identified parents W & William — first a son (b.~1918), then head of a 6-person household.
Age 22
b. ~1918
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Chickasaw-County, Iowa |
| Surname | Pierce |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Bradford twp |
| 1935 Residence (County) | Chickasaw |
| Additional Details | |
| Industry | 0 |
| Highest Grade | C 3 |
| 1935 Residence | Same house |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Bradford Twp |
| Est. Birth Year | ~1918 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Robert Pierce | Son | — | 22 | ~1918 |
| W Pierce | Head | — | 54 | ~1886 |
| Velma Pierce | Daughter | — | 12 | ~1928 |
| Clarence Tomka | Other | — | 20 | ~1920 |
| Charlotte Pierce | Spouse | — | 45 | ~1895 |
| Margaret Pierce | Daughter | — | 20 | ~1920 |
Census Appearances
1920
Chickasaw, Iowa
Son, age 2
Chickasaw, Iowa · implied b. ~1918 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Pierce |
| Given Name | Robert A |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | none |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Chickasaw, Iowa
Son, age 12
Chickasaw, Iowa · implied b. ~1918 — 35 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Pierce |
| Given Name | Robert Allen |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Chickasaw-County, Iowa
Son, age 22
Chickasaw-County, Iowa · implied b. ~1918 — 6 household members
| Surname | Pierce |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Bradford twp |
| 1935 Residence (County) | Chickasaw |
| Industry | 0 |
| Highest Grade | C 3 |
| 1935 Residence | Same house |
| 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 Pierce across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father W Pierce (~0.92 confidence) and father William Pierce (~0.92 confidence) and mother Charlotte Pierce (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
W Pierce
b. ~1886
Source father
● Household
· direct · ~0.92
Father
William Pierce
b. ~1886
Source father
● Household
· direct · ~0.92
Mother
Charlotte Pierce
b. ~1895
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Pierce
Son · 1940 · age 22 · b. ~1918 · Iowa
★ You are viewing this record
Sibling
Velma Pierce
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Pierce
Sibling · 1940 · age 20
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 — Chickasaw-County, Iowa
Open full size
1940 US Federal Census — Chickasaw-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01147-00624)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Josephine Volomann | 11 | daughter | — | Iowa |
| 2 | Richard Volomann | 4 | son | — | Iowa |
| 3 | Phyllis Volomann | 1 | daughter | — | Iowa |
| 4 | W. G. Pierce | 54 | Head | Laborer | Iowa |
| 5 | Charlotte Pierce | 45 | Wife | — | Iowa |
| 6 | Robert Pierce THIS PERSON | 22 | Son | — | Iowa |
| 7 | Margaret Pierce | 20 | Daughter | — | Iowa |
| 8 | Velma L. Pierce | 12 | Daughter | — | England |
| 9 | Clarence Tomka | 20 | Laborer | Laborer | Iowa |
| 10 | Elmer Lindner | 43 | Head | Laborer | Iowa |
| 11 | Erna Lindner | 37 | Wife | — | Iowa |
| 12 | Merlwin Lindner | 17 | Son | Laborer | Iowa |
| 13 | Bernice Lindner | 15 | Daughter | — | Iowa |
| 14 | Lavon Lindner | 13 | Daughter | — | Iowa |
| 15 | Arlene Lindner | 9 | Daughter | — | Iowa |
| 16 | Duane Lindner | 7 | Son | — | Iowa |
| 17 | Ella Mae Lindner | 2 | Daughter | — | Iowa |
| 18 | Russell Allison | 39 | Head | Laborer | Iowa |
| 19 | Elna Allison | 34 | Wife | — | Iowa |
| 20 | Delbert Allison | 14 | Son | — | Iowa |
| 21 | Jean Allison | 12 | Daughter | — | Iowa |
| 22 | Max Allison | 10 | Son | — | Iowa |
| 23 | Fern Allison | 8 | Daughter | — | Iowa |
| 24 | Sharon Allison | 3 | Daughter | — | Iowa |
| 25 | Alfred Vitter | 41 | Head | Laborer | Germany |
| 26 | Helen Vitter | 39 | Wife | — | Wisconsin |
| 27 | Edna Vitter | 15 | Daughter | — | Iowa |
| 28 | Ernest Vitter | 8 | Son | — | Iowa |
| 29 | Marian Vitter | 4 | Daughter | — | Iowa |
| 30 | Helen Vitter | 1 | Daughter | — | Iowa |
| 31 | Daniel Meish | 28 | Laborer | — | Iowa |
| 32 | R. W. Dimm | 39 | Head | Laborer | Nebraska |
| 33 | Hedwig Dimm | 39 | Wife | — | Germany |
| 34 | Roy Dimm | 12 | Son | — | Nebraska |
| 35 | Mae Dimm | 10 | Daughter | — | Nebraska |
| 36 | Ivan Dimm | 5 | Son | — | Nebraska |
| 37 | Marvin Dimm | 1 | Son | — | Nebraska |
| 38 | P. George Lynch | 75 | Head | Laborer | Iowa |
| 39 | Thomas Smith | 40 | Head | Laborer | Iowa |
| 40 | Dorothy Smith | 35 | Wife | — | Iowa |
Pedigree Summary
Robert + 2 siblings
Gen 1 · 3 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)