RA
Robert Armstrong — 1940 US Census Record
Model Tree available1940 United States Federal Census · Wapello-County, Iowa
Our Model Tree links this Robert Armstrong across the 1920, 1930 and 1940 US Censuses in Wapello-County, Iowa (XGBoost, ~Confirmed), with identified parents Otto & Otha — first a son (b.~1918), then head of a 3-person household.
Age 22
b. ~1918
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Wapello-County, Iowa |
| Surname | Armstrong |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Ottumwa City |
| 1935 Residence (County) | Wapello County |
| Additional Details | |
| Class of Worker | 0 |
| Hours Worked | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Ottumwa City |
| 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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Otto Armstrong | Head | — | 60 | ~1880 |
| Robert Armstrong | Son | — | 22 | ~1918 |
| Sadie Armstrong | Spouse | — | 56 | ~1884 |
Census Appearances
1920
Wapello, Iowa
Son, age 2
Wapello, Iowa · implied b. ~1918 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Armstrong |
| Given Name | Robert E |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Wapello, Iowa
Son, age 12
Wapello, Iowa · implied b. ~1918 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Armstrong |
| Given Name | Robert E. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Iowa |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Wapello-County, Iowa
Son, age 22
Wapello-County, Iowa · implied b. ~1918 — 3 household members
| Surname | Armstrong |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Ottumwa City |
| 1935 Residence (County) | Wapello County |
| Class of Worker | 0 |
| Hours Worked | 0 |
| Highest Grade | Hs 4 |
| 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 Robert Armstrong across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Otto Armstrong (~0.92 confidence) and father Otha Armstrong (~0.92 confidence) and mother Sadie Armstrong (~0.92 confidence) and mother Catharine Armstrong (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Otto Armstrong
b. ~1880
Source father
● Household
· direct · ~0.92
Father
Otha Armstrong
b. ~1881
Source father
● Household
· direct · ~0.92
Mother
Sadie Armstrong
b. ~1884
Source mother
● Household
· direct · ~0.92
Mother
Catharine Armstrong
b. ~1885
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Armstrong
Son · 1940 · age 22 · b. ~1918 · Iowa
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Wapello-County, Iowa
Open full size
1940 US Federal Census — Wapello-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01209-00339)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Geo A. Merrill | 39 | Head | Director Public Relations | Iowa |
| 2 | Mary E. Merrill | 36 | Wife | — | Missouri |
| 3 | Loyal Gale Merrill | 13 | Daughter | — | Iowa |
| 4 | John Merrill | 7 | Son | — | Illinois |
| 5 | Elenor Swanson | 18 | Maid | Maid | Iowa |
| 6 | Emma Larson | 55 | Housekeeper | Housekeeper | Iowa |
| 7 | E. G. Merrill | 52 | Head | Trust Dept | California |
| 8 | Mary E. Merrill | 53 | Wife | — | Iowa |
| 9 | Geo S. Merrill | 26 | Son | Messenger | Iowa |
| 10 | Sarah Pop Merrill | 49 | Head | — | Iowa |
| 11 | Honora Mccollum | 63 | Housekeeper | Housekeeper | Iowa |
| 12 | Otto W. Armstrong | 60 | Head | Postal Clerk | Iowa |
| 13 | Sadie M. Armstrong | 56 | Wife | — | Iowa |
| 14 | Robert Armstrong THIS PERSON | 22 | Son | — | Iowa |
| 15 | Joseph Bensmiller | 63 | Head | Proprietor | Iowa |
| 16 | Nadine E. Bensmiller | 53 | Wife | — | Iowa |
| 17 | Helen M. Bensmiller | 28 | Daughter | Bookkeeper | Iowa |
| 18 | Erwin L. Daisel | 35 | Head | Upholsterer | Iowa |
| 19 | Leona Daisel | 35 | Wife | — | Iowa |
| 20 | Ila Mae Walker | 23 | Head | Stenographer | Iowa |
| 21 | Ellen S. Sorenson | 48 | Head | Office Secretary | Iowa |
| 22 | Hugh F. Bell | 21 | Head | — | Massachusetts |
| 23 | Gordon Hall Bell | 18 | Brother | — | Massachusetts |
| 24 | Mary M. Mcclelland | 68 | Aunt | — | Iowa |
| 25 | Elizabeth Smoot | 35 | Maid | Maid | Iowa |
| 26 | Raymond P. Johnson | 41 | Head | Physician | Iowa |
| 27 | Jewel R. Johnson | 30 | Wife | — | Georgia |
| 28 | Frances R. Johnson | 5 | Daughter | — | Iowa |
| 29 | Raymond P. Johnson | 2 | Son | — | Iowa |
| 30 | Herman J. Schaefer | 36 | Head | City Attorney | Iowa |
| 31 | Mona Marcelle Schaefer | 32 | Wife | — | Iowa |
| 32 | William J. Hunt | 28 | Head | Attorney | Iowa |
| 33 | Beryl B. Hunt | 25 | Wife | — | Iowa |
| 34 | Joan B. Hunt | 2 | Daughter | — | Iowa |
| 35 | Raymond James | 19 | Nephew | Clerk Of Office | Iowa |
| 36 | H. James Shipley | 37 | Head | Machinist | Iowa |
| 37 | Lula Shipley | 45 | Wife | Proprietress | Iowa |
| 38 | Nelle Sarah Johnson | 32 | Head | Wrapper | Iowa |
| 39 | Mildred Lunn | 22 | Head | Secretary | Iowa |
| 40 | Emma Lou Meyer | 22 | Lodger | Waitress | Missouri |
Pedigree Summary
Robert
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)