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Mary Armstrong — 1940 US Census Record
Model Tree available1940 United States Federal Census · Keokuk-County, Iowa
Our Model Tree links this Mary Armstrong across the 1920, 1930 and 1940 US Censuses in Keokuk-County, Iowa (XGBoost, ~Confirmed), with identified parents Thas & Anna — first a daughter (b.~1908), then head of a 8-person household.
Age 32
b. ~1908
Female
Daughter
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Keokuk-County, Iowa |
| Surname | Armstrong |
| Given Name | Mary Ann |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 32 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Washington Township |
| 1935 Residence (County) | Cooke | Keokuk County |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | H-2 |
| 1935 Residence | Same House |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Washington Township |
| Est. Birth Year | ~1908 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Armstrong | Daughter | — | 32 | ~1908 |
| Angeline Armstrong | Daughter | — | 23 | ~1917 |
| Jeanette Armstrong | Daughter | — | 30 | ~1910 |
| Anna Armstrong | Head | — | 63 | ~1877 |
| Richard Armstrong | Other | — | 1 | ~1939 |
| Albert Armstrong | Son | — | 39 | ~1901 |
| William Armstrong | Son | — | 28 | ~1912 |
| Tunis Armstrong | Son | — | 26 | ~1914 |
Census Appearances
1920
Keokuk, Iowa
Daughter, age 13
Keokuk, Iowa · implied b. ~1907 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Armstrong |
| Given Name | Mary G |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Iowa |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Keokuk, Iowa
Daughter, age 22
Keokuk, Iowa · implied b. ~1908 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Armstrong |
| Given Name | Mary Anne |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Iowa |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Keokuk-County, Iowa
Daughter, age 32
Keokuk-County, Iowa · implied b. ~1908 — 8 household members
| Surname | Armstrong |
| Given Name | Mary Ann |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 32 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Washington Township |
| 1935 Residence (County) | Cooke | Keokuk County |
| Class of Worker | 0 |
| Highest Grade | H-2 |
| 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 Mary Armstrong across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Thas Armstrong (~0.92 confidence) and mother Anna Armstrong (~0.92 confidence) and mother Anna Armstrong (~0.92 confidence) and mother Ivana Armstrong (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Thas Armstrong
b. ~1868
Source father
● Household
· direct · ~0.92
Mother
Anna Armstrong
b. ~1876
Source mother
● Household
· direct · ~0.92
Mother
Anna Armstrong
b. ~1877
Source mother
● Household
· direct · ~0.92
Mother
Ivana Armstrong
b. ~1877
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Armstrong
Daughter · 1940 · age 32 · b. ~1908 · Iowa
★ You are viewing this record
Sibling
Angeline Armstrong
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Armstrong
Sibling · 1940 · age 28
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Tunis Armstrong
Sibling · 1940 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jeanette Armstrong
Sibling · 1940 · age 30
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Albert Armstrong
Sibling · 1940 · age 39
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 — Keokuk-County, Iowa
Open full size
1940 US Federal Census — Keokuk-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01172-01130)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Neil S. Steins | 14 | Son | — | Iowa |
| 42 | Leigh C. Stein | 36 | Head | Farmer | Iowa |
| 43 | Margaret Stein | 28 | Wife | — | Iowa |
| 44 | Palmer Pokranty | 41 | Head | Farmer | Iowa |
| 45 | Dessie Pokranty | 27 | Wife | — | Mississippi |
| 46 | Emma Swain | 68 | Mother | — | Germany |
| 47 | James D. Swains | 55 | Head | Farmer | Iowa |
| 48 | Edith E. Swains | 50 | Wife | — | Iowa |
| 49 | John O'Keefe | 69 | Head | Farmer | Iowa |
| 50 | Anna O'Keefe | 62 | Wife | — | Iowa |
| 51 | David P. Graham | 39 | Head | Farmer | Iowa |
| 52 | Helen M. Graham | 26 | Wife | — | Iowa |
| 53 | James H. Replinger | 57 | Head | Farmer | Iowa |
| 54 | Myrtle Luella Replinger | 53 | Wife | — | Pennsylvania |
| 55 | Helen Replinger | 20 | Daughter | — | Iowa |
| 56 | Jake A. Replinger | 60 | Head | Farmer | Iowa |
| 57 | Edith L. Replinger | 61 | Wife | — | Iowa |
| 58 | Anna Armstrong | 63 | Head | — | Iowa |
| 59 | Albert Armstrong | 39 | Son | — | Iowa |
| 60 | Mary Ann Armstrong THIS PERSON | 32 | Daughter | — | Iowa |
| 61 | Jeanette Armstrong | 30 | Daughter | — | Iowa |
| 62 | William Armstrong | 28 | Son | Laborer | Iowa |
| 63 | Tunis Armstrong | 26 | Son | — | Iowa |
| 64 | Angeline Armstrong | 23 | Daughter | — | Iowa |
| 65 | Richard Armstrong | 1 | Grandson | — | Iowa |
| 66 | Louis G. Yaknke | 53 | Head | Farmer | Iowa |
| 67 | Hattie Yaknke | 48 | Wife | — | Iowa |
| 68 | William E. Fyfes | 51 | Head | Farmer | Iowa |
| 69 | Pearl Fyfes | 43 | Wife | — | Iowa |
| 70 | Nioma Fyfes | 18 | Daughter | — | Iowa |
| 71 | Walter Larkin | 54 | Head | Laborer | Iowa |
| 72 | Minnie Larkin | 52 | Wife | — | Iowa |
| 73 | Joseph Pringle | 58 | Head | Farmer | Iowa |
| 74 | Inez Pringle | 46 | Wife | — | Iowa |
| 75 | Frances Pringle | 22 | Daughter | — | Iowa |
| 76 | James Pringle | 20 | Son | Farm Laborer | Iowa |
| 77 | Eugene Pringle | 12 | Son | — | Iowa |
| 78 | Frank H. Beeman | 70 | Head | Farmer | Iowa |
| 79 | Kate Beeman | 70 | Wife | — | Iowa |
| 80 | Boyd Beeman | 42 | Son | Farmer | Iowa |
Related Census Records
Pedigree Summary
Mary + 5 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)