CA
Charles Armstrong — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Polk-County, Iowa
Our Model Tree links this Charles Armstrong across the 1930 and 1940 US Censuses in Polk-County, Iowa (XGBoost, ~Confirmed) — first a son (b.~1921), then head of a 10-person household.
Age 19
b. ~1921
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Polk-County, Iowa |
| Surname | Armstrong |
| Given Name | Charles |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Additional Details | |
| Highest Grade | H-2 |
| 1935 Residence | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Des Moines City |
| Est. Birth Year | ~1921 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Charles | Age | Birth yr |
|---|---|---|---|---|
| Orville Armstrong | Son | — | 11 | ~1929 |
| John Armstrong | Son | — | 13 | ~1927 |
| Virgil Armstrong | Head | — | 40 | ~1900 |
| William Armstrong | Son | — | 2 | ~1938 |
| Charles Armstrong | Son | — | 19 | ~1921 |
| Donald Armstrong | Son | — | 7 | ~1933 |
| Virgil Armstrong | Son | — | 15 | ~1925 |
| Guy Armstrong | Son | — | 17 | ~1923 |
| Bernice Armstrong | Spouse | — | 36 | ~1904 |
| Mary Armstrong | Daughter | — | 4 | ~1936 |
Census Appearances
1930
Polk, Iowa
Son, age 9
Polk, Iowa · implied b. ~1921 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Armstrong |
| Given Name | Charles |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 9 |
| 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
Polk-County, Iowa
Son, age 19
Polk-County, Iowa · implied b. ~1921 — 10 household members
| Surname | Armstrong |
| Given Name | Charles |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Highest Grade | H-2 |
| 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 Charles Armstrong across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Charles Armstrong
Son · 1940 · age 19 · b. ~1921 · Iowa
★ You are viewing this record
Sibling
Guy Armstrong
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Donald Armstrong
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Orville Armstrong
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Armstrong
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Armstrong
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Virgil Armstrong
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Armstrong
Sibling · 1940 · age 2
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 — Polk-County, Iowa
Open full size
1940 US Federal Census — Polk-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01197-00624)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Howard Hunt | 12 | Head | — | Iowa |
| 42 | Barbara Hunt | 8 | Daughter | — | Iowa |
| 43 | Terrence Bennett | 25 | Head | Carbon Coal | Iowa |
| 44 | Virginia Bennett | 21 | Wife | Housewife | Iowa |
| 45 | Terrence Jr. Bennett | 1 | Son | — | Iowa |
| 46 | Elton Lyle | 36 | Head | Sewer Construction | Missouri |
| 47 | Martha A. Lyle | 37 | Wife | Housewife | Iowa |
| 48 | Raymond Patterson | 24 | Head | Laborer | Iowa |
| 49 | Velma Patterson | 18 | Wife | Housewife | Iowa |
| 50 | Joe Miller | 58 | Lodger | Direct Relief | Missouri |
| 51 | Floyd Miller | 21 | Lodger | Direct Relief | Missouri |
| 52 | Elmer Miller | 16 | Lodger | — | Iowa |
| 53 | Maggie Davis | 71 | Head | Old Age Pension | Illinois |
| 54 | Lee Ligon | 46 | Head | Laborer | Missouri |
| 55 | Cleo Ligon | 34 | Wife | Housewife | Iowa |
| 56 | Calvin Thomas | 70 | Head | Old Age Pension | Alabama |
| 57 | Flossie Thomas | 47 | Wife | Housewife | Missouri |
| 58 | Ezekiel Chambers | 72 | Head | Old Age Pension | Indiana |
| 59 | Etta B. Chambers | 70 | Wife | Old Age Pension | Illinois |
| 60 | Virgil Armstrong | 40 | Head | Meat Cutter | Iowa |
| 61 | Bernice Armstrong | 36 | Wife | — | Iowa |
| 62 | Charles Armstrong THIS PERSON | 19 | Son | — | Iowa |
| 63 | Guy Armstrong | 17 | Son | — | Iowa |
| 64 | Virgil Wayne Armstrong | 15 | Son | — | Iowa |
| 65 | John Armstrong | 13 | Son | — | Iowa |
| 66 | Orville E. Armstrong | 11 | Son | — | Illinois |
| 67 | Donald Armstrong | 7 | Son | — | Iowa |
| 68 | Mary Armstrong | 4 | Daughter | — | Iowa |
| 69 | William Armstrong | 2 | Son | — | Iowa |
| 70 | John Armstrong | 69 | Head | Fireman | Missouri |
| 71 | Maud Armstrong | 62 | Wife | Housewife | Iowa |
| 72 | Bonnie Maier | 15 | Granddaughter | — | Iowa |
| 73 | John Hildenbrand | 38 | Head | Pittsburg Des Moines Steel | Iowa |
| 74 | Mary Hildenbrand | 31 | Wife | Housewife | Iowa |
| 75 | William Hildenbrand | 13 | Son | — | Iowa |
| 76 | Betty Hildenbrand | 12 | Daughter | — | Iowa |
| 77 | Velma Hildenbrand | 11 | Daughter | — | Iowa |
| 78 | Patricia Hildenbrand | 9 | Daughter | — | Iowa |
| 79 | Marguerite Hildenbrand | 7 | Daughter | — | Iowa |
| 80 | Virginia Hildenbrand | 4 | Daughter | — | 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)