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Joan Smith — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Johnson-County, Iowa
Our Model Tree links this Joan Smith across the 1930 and 1940 US Censuses in Johnson-County, Iowa (XGBoost, ~Confirmed) — first a daughter (b.~1928), then head of a 8-person household.
Age 12
b. ~1928
Female
Daughter
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Johnson-County, Iowa |
| Surname | Smith |
| Given Name | Joan |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Iowa City |
| 1935 Residence (County) | Johnson |
| Additional Details | |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Iowa 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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Joan | Age | Birth yr |
|---|---|---|---|---|
| Wayne Smith | Son | — | 3 | ~1937 |
| Helen Smith | Daughter | — | 5 | ~1935 |
| Ernest Smith | Son | — | 14 | ~1926 |
| Edna Smith | Spouse | — | 39 | ~1901 |
| Ernest Smith | Head | — | 38 | ~1902 |
| Margaret Bess | Other | — | 21 | ~1919 |
| Joan Smith | Daughter | — | 12 | ~1928 |
| Kathaline Smith | Daughter | — | 15 | ~1925 |
Census Appearances
1930
Johnson, Iowa
Daughter, age 2
Johnson, Iowa · implied b. ~1928 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | Joan |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Johnson-County, Iowa
Daughter, age 12
Johnson-County, Iowa · implied b. ~1928 — 8 household members
| Surname | Smith |
| Given Name | Joan |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Iowa City |
| 1935 Residence (County) | Johnson |
| Highest Grade | No 7 |
| 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 Joan Smith across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Joan Smith
Daughter · 1940 · age 12 · b. ~1928 · Iowa
★ You are viewing this record
Sibling
Kathaline Smith
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ernest Smith
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Wayne Smith
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Smith
Sibling · 1940 · age 5
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 — Johnson-County, Iowa
Open full size
1940 US Federal Census — Johnson-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01171-00346)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Patricia Kiefer | 1 | Daughter | — | Iowa |
| 42 | Here Ends Ward 2 Kiefer | None | — | — | — |
| 43 | Henry E. Hegland | 56 | Head | Office Work | Iowa |
| 44 | Bertha Hegland | 52 | Wife | — | Iowa |
| 45 | Charlotte Hegland | 21 | Daughter | Office Work | Iowa |
| 46 | Marcella Hotz | 48 | Head | Secretary | Iowa |
| 47 | Jess Hotz | 46 | Sister | Insurance | Iowa |
| 48 | Albert Hotz | 40 | Brother | Sales Man | Iowa |
| 49 | Rhodes Dunlap | 29 | Lodger | English Teacher | Texas |
| 50 | Pearl Arnold | 32 | Maid | House Maid | Iowa |
| 51 | Victoria Schneider | 72 | Head | — | Iowa |
| 52 | Alberta Rogers | 33 | Head | Secretary | Iowa |
| 53 | Albert Rogers | 62 | Father | — | Iowa |
| 54 | Ella Rogers | 63 | Mother | — | Iowa |
| 55 | Chris Christensen | 66 | Uncle | — | Iowa |
| 56 | Bridget Madden | 87 | Head | — | Kentucky |
| 57 | Helen Madden | 56 | Daughter | — | Iowa |
| 58 | Rose Madden | 54 | Daughter | Store | Iowa |
| 59 | Loretta Madden | 42 | Daughter | Secretary | Iowa |
| 60 | Myral Wical | 30 | Niece | Employment | Iowa |
| 61 | Ernest J. Smith | 38 | Head | Painter | Iowa |
| 62 | Edna Smith | 39 | Wife | — | Iowa |
| 63 | Kathaline Smith | 15 | Daughter | — | Iowa |
| 64 | Ernest Smith | 14 | Son | — | Iowa |
| 65 | Joan Smith THIS PERSON | 12 | Daughter | — | Iowa |
| 66 | Helen Smith | 5 | Daughter | — | Iowa |
| 67 | Wayne Smith | 3 | Son | — | Iowa |
| 68 | Margaret Bess | 21 | Lodger | Waitress | Iowa |
| 69 | John Husa | 47 | Head | Tailor | Illinois |
| 70 | Gertrude Husa | 58 | Wife | — | Illinois |
| 71 | Ruth Husa | 18 | Daughter | — | Iowa |
| 72 | Albert Husa | 76 | Head | — | Czecho Slovakia |
| 73 | Eleanora Husa | 69 | Wife | — | Czecho Slovakia |
| 74 | Albert Husa | 38 | Son | Tailor | Iowa |
| 75 | Alice Husa | 30 | Wife | Director | Kentucky |
| 76 | Frank Kuncl | 69 | Head | Janitor | Iowa |
| 77 | Elizabeth Kuncl | 61 | Wife | Maid | Wisconsin |
| 78 | Marie Kuncl | 27 | Daughter | Bookkeeper | Iowa |
| 79 | Patricia Kuncl | 17 | Daughter | — | Iowa |
| 80 | Amelia Holoubek | 50 | Head | Maid | Nebraska |
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)