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Betty Smith — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Clay-County, Iowa
Our Model Tree links this Betty Smith across the 1930 and 1940 US Censuses in Clay-County, Iowa (XGBoost, ~Confirmed) — first a daughter (b.~1930), then head of a 11-person household.
Age 10
b. ~1930
Female
Daughter
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Clay-County, Iowa |
| Surname | Smith |
| Given Name | Betty J |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Logan Township |
| 1935 Residence (County) | Clay |
| Additional Details | |
| Highest Grade | 5 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Logan Township |
| Est. Birth Year | ~1930 |
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.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Betty | Age | Birth yr |
|---|---|---|---|---|
| Betty Smith | Daughter | — | 10 | ~1930 |
| Mary Smith | Daughter | — | 11 | ~1929 |
| Rose Smith | Daughter | — | 14 | ~1926 |
| Ben Smith | Head | — | 47 | ~1893 |
| Albert Smith | Son | — | 9 | ~1931 |
| Jimie Smith | Son | — | 3 | ~1937 |
| Ben Smith | Son | — | 13 | ~1927 |
| Richard Smith | Son | — | 15 | ~1925 |
| Clarence Smith | Son | — | 17 | ~1923 |
| George Smith | Son | — | 1 | ~1939 |
| Olive Smith | Spouse | — | 40 | ~1900 |
Census Appearances
1930
Clay, Iowa
Daughter, age
Clay, Iowa · implied b. ~1930 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | Betty L |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Clay-County, Iowa
Daughter, age 10
Clay-County, Iowa · implied b. ~1930 — 11 household members
| Surname | Smith |
| Given Name | Betty J |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Logan Township |
| 1935 Residence (County) | Clay |
| Highest Grade | 5 |
| 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 Betty Smith across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Betty Smith
Daughter · 1940 · age 10 · b. ~1930 · Iowa
★ You are viewing this record
Sibling
Clarence Smith
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
George Smith
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jimie Smith
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Smith
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ben Smith
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Smith
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rose Smith
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Albert Smith
Sibling · 1940 · age 9
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 — Clay-County, Iowa
Open full size
1940 US Federal Census — Clay-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01148-00497)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Lera J Tielbur | 13 | Daughter | — | Iowa |
| 42 | Kay Tielbur | 12 | Son | — | Iowa |
| 43 | Hillis Tielbur | 4 | Son | — | Iowa |
| 44 | Dorisanna Tielbur | 3 | Daughter | — | Iowa |
| 45 | Charles Barnard | 50 | Head | Farming | Iowa |
| 46 | Helen Barnard | 45 | Wife | — | Iowa |
| 47 | Richard Barnard | 12 | Son | — | Iowa |
| 48 | Grace H Barnard | 7 | Daughter | — | Iowa |
| 49 | Howard J Nielsen | 20 | Hired man | Labor | Iowa |
| 50 | George Brinkley | 49 | Head | Farming | Illinois |
| 51 | Neva H Brinkley | 43 | Wife | — | Illinois |
| 52 | Marion E Brinkley | 17 | Son | — | Iowa |
| 53 | Ray S Herrig | 33 | Head | Farming | Iowa |
| 54 | Gils G Herrig | 33 | Wife | — | Iowa |
| 55 | Madeline Herrig | 11 | Daughter | — | Iowa |
| 56 | Edward M Herrig | 10 | Son | — | Iowa |
| 57 | Robert S Herrig | 8 | Son | — | Iowa |
| 58 | Peggy M Herrig | 7 | Daughter | — | Iowa |
| 59 | Ben R Smith | 47 | Head | Farming | Iowa |
| 60 | Olive F Smith | 40 | Wife | — | Iowa |
| 61 | Clarence M Smith | 17 | Son | Labor | Iowa |
| 62 | Richard W Smith | 15 | Son | — | Iowa |
| 63 | Rose M Smith | 14 | Daughter | — | Iowa |
| 64 | Ben Jr Smith | 13 | Son | — | Iowa |
| 65 | Mary J Smith | 11 | Daughter | — | Iowa |
| 66 | Betty J Smith THIS PERSON | 10 | Daughter | — | Iowa |
| 67 | Albert B Smith | 9 | Son | — | Iowa |
| 68 | Jimie L Smith | 3 | Son | — | Iowa |
| 69 | George F Smith | 1 | Son | — | Iowa |
| 70 | Lester Lawrence | 41 | Head | Farming | Pennsylvania |
| 71 | Martha A Lawrence | 32 | Wife | — | Ohio |
| 72 | Harold Vanderhoff | 35 | Head | Farming | Iowa |
| 73 | Neva P Vanderhoff | 39 | Wife | — | Iowa |
| 74 | Wilma E Vanderhoff | 12 | Daughter | — | Iowa |
| 75 | Vernita Vanderhoff | 10 | Daughter | — | Iowa |
| 76 | Nila J Vanderhoff | 8 | Daughter | — | Iowa |
| 77 | June M Vanderhoff | 2 | Daughter | — | Iowa |
| 78 | Larry R Vanderhoff | 0 | Son | — | Iowa |
| 79 | Robert Vanderhoff | 17 | Boarder | — | Iowa |
| 80 | Anna Vanderhoff | 71 | Head | — | Germany |
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)