BA
Betty Allen — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Decatur-County, Iowa
Our Model Tree links this Betty Allen across the 1930 and 1940 US Censuses in Decatur-County, Iowa (XGBoost, ~Confirmed) — first a daughter (b.~1928), then head of a 7-person household.
Age 12
b. ~1928
Female
Daughter
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Decatur-County, Iowa |
| Surname | Allen |
| Given Name | Betty |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Lamoni City |
| 1935 Residence (County) | Decatur |
| Additional Details | |
| Highest Grade | G 5 |
| 1935 Residence | Same House |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Lamoni City |
| Est. Birth Year | ~1928 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Betty | Age | Birth yr |
|---|---|---|---|---|
| Betty Allen | Daughter | — | 12 | ~1928 |
| Mildred Allen | Spouse | — | 46 | ~1894 |
| Wilbur Allen | Head | — | 50 | ~1890 |
| Wilberta Allen | Daughter | — | 21 | ~1919 |
| Robert Allen | Son | — | 19 | ~1921 |
| Carol Allen | Daughter | — | 15 | ~1925 |
| Nina Allen | Daughter | — | 18 | ~1922 |
Census Appearances
1930
Decatur, Iowa
Daughter, age 2
Decatur, Iowa · implied b. ~1928 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Allen |
| Given Name | Betty |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Michigan |
| Mother's Birthplace | Michigan |
| Occupation | none |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Decatur-County, Iowa
Daughter, age 12
Decatur-County, Iowa · implied b. ~1928 — 7 household members
| Surname | Allen |
| Given Name | Betty |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Lamoni City |
| 1935 Residence (County) | Decatur |
| Highest Grade | G 5 |
| 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 Betty Allen across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Betty Allen
Daughter · 1940 · age 12 · b. ~1928 · Iowa
★ You are viewing this record
Sibling
Wilberta Allen
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Carol Allen
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Allen
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Nina Allen
Sibling · 1940 · age 18
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 — Decatur-County, Iowa
Open full size
1940 US Federal Census — Decatur-County, Iowa
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-01154-00595)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Ralph Silver | 47 | Head | Manager | Iowa |
| 42 | Fernande Silver | 35 | Wife | — | France |
| 43 | Robert Silver | 14 | Son | — | Iowa |
| 44 | Jacqueline Silver | 13 | Daughter | — | Iowa |
| 45 | Raymond Silver | 11 | Son | — | Iowa |
| 46 | Maurice Silver | 4 | Son | — | Iowa |
| 47 | Gary Silver | 6 | Son | — | Iowa |
| 48 | Edward Pettit | 34 | Head | Mechanic | Iowa |
| 49 | Violet Pettit | 33 | Wife | — | Iowa |
| 50 | Dora Alice Pettit | 9 | Daughter | — | Wisconsin |
| 51 | Janice Pettit | 2 | Daughter | — | Iowa |
| 52 | Mercedes Mccampbell | 27 | Lodger | Teacher | Missouri |
| 53 | John Swigart | 36 | Head | Laborer | Missouri |
| 54 | Olive Swigart | 34 | Wife | — | Iowa |
| 55 | Kenneth Swigart | 15 | Son | — | Missouri |
| 56 | Kathern Swigart | 12 | Daughter | — | Iowa |
| 57 | Wilbur Allen | 50 | Head | Carpenter Plumber | Missouri |
| 58 | Mildred Allen | 46 | Wife | — | Iowa |
| 59 | Wilberta Allen | 21 | Daughter | Homework | Iowa |
| 60 | Robert Allen | 19 | Son | Carpenter Plumber | Iowa |
| 61 | Nina Allen | 18 | Daughter | — | Iowa |
| 62 | Carol Allen | 15 | Daughter | — | Iowa |
| 63 | Betty Allen THIS PERSON | 12 | Daughter | — | Iowa |
| 64 | Howard Roper | 38 | Head | — | New Jersey |
| 65 | Emma Roper | 74 | Wife | — | Utah |
| 66 | Carroll Roper | 22 | Grandson | — | Iowa |
| 67 | Fleta Woods | 26 | Head | Operator | Iowa |
| 68 | Lula Park | 56 | Head | — | Nebraska |
| 69 | Andrew Park | 20 | Son | — | Colorado |
| 70 | Irene Park | 12 | Daughter | — | Colorado |
| 71 | Vern Park | 14 | Son | — | Colorado |
| 72 | Martha Young | 73 | Head | — | Utah |
| 73 | Joseph Botall | 81 | Head | — | Indiana |
| 74 | Lena Botall | 67 | Wife | — | Iowa |
| 75 | Leslie Botall | 43 | Son | — | Iowa |
| 76 | William T Guthrie | 23 | Head | Manager | Illinois |
| 77 | Jane Guthrie | 23 | Wife | — | Illinois |
| 78 | Judith Ann Guthrie | 2 | Daughter | — | Illinois |
| 79 | David Lee Guthrie | 1 | Son | — | Illinois |
Related Census Records
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)