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Jean Smith — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Polk-County, Iowa
Our Model Tree links this Jean Smith across the 1930 and 1940 US Censuses in Polk-County, Iowa (XGBoost, ~Confirmed) — first a daughter (b.~1930), then head of a 12-person household.
Age 10
b. ~1930
Female
Daughter
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Polk-County, Iowa |
| Surname | Smith |
| Given Name | Jean |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines |
| 1935 Residence (County) | Polk |
| Additional Details | |
| Highest Grade | 4 |
| 1935 Residence | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | West Des Moines |
| 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.
12 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Jean | Age | Birth yr |
|---|---|---|---|---|
| Gwendolyn Smith | Daughter | — | 13 | ~1927 |
| Mildred Smith | Daughter | — | 22 | ~1918 |
| Virginia Smith | Daughter | — | 9 | ~1931 |
| Jean Smith | Daughter | — | 10 | ~1930 |
| John Smith | Head | — | 42 | ~1898 |
| Lawrence Scafinger | Other | — | 21 | ~1919 |
| Donald Smith | Son | — | 5 | ~1935 |
| William Smith | Son | — | 14 | ~1926 |
| Robert Smith | Son | — | 16 | ~1924 |
| Lester Smith | Son | — | 11 | ~1929 |
| Arthur Smith | Son | — | 18 | ~1922 |
| Tressa Smith | Spouse | — | 41 | ~1899 |
Census Appearances
Daughter, age
Polk, Iowa · implied b. ~1930 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | Joan |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | none |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Polk-County, Iowa
Daughter, age 10
Polk-County, Iowa · implied b. ~1930 — 12 household members
| Surname | Smith |
| Given Name | Jean |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines |
| 1935 Residence (County) | Polk |
| Highest Grade | 4 |
| 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 Jean Smith across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Jean Smith
Daughter · 1940 · age 10 · b. ~1930 · Iowa
★ You are viewing this record
Sibling
Arthur Smith
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Smith
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Virginia Smith
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lester Smith
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Smith
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mildred Smith
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Donald Smith
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gwendolyn Smith
Sibling · 1940 · age 13
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-t0627-01192-00827)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Evelyn Keating | 29 | Wife | Stenographer | Iowa |
| 2 | John Keating | 2 | Son | — | Iowa |
| 3 | Joan Keating | 9 | Daughter | — | Iowa |
| 4 | Buddy (Charles) Keating | 1 | Son | — | Iowa |
| 5 | Carl S. Hahnen | 44 | Head | Steward | Iowa |
| 6 | Eva L. Hahnen | 41 | Wife | — | Iowa |
| 7 | John J. Zupan | 29 | Head | Coal Miner | Iowa |
| 8 | Doris D. Zupan | 25 | Wife | — | Iowa |
| 9 | Connie D. Zupan | 4 | Daughter | — | Iowa |
| 10 | Sharol Zupan | 2 | Daughter | — | Iowa |
| 11 | Byron P. Swely | 49 | Head | Salesman | Illinois |
| 12 | Bertha A. Swely | 48 | Wife | — | Iowa |
| 13 | William Hartzell | 22 | Step-son | Employee | Iowa |
| 14 | Gordon Hartzell | 21 | Step-son | Waiter | Iowa |
| 15 | Venita Anna Hartzell | 15 | Step-daughter | — | Minnesota |
| 16 | John Zupan | 53 | Head | Coal Miner | Austria |
| 17 | Ethel D. Zupan | 49 | Wife | — | Austria |
| 18 | George Zupan | 23 | Son | Coal Miner | Iowa |
| 19 | Barbara J. Zupan | 16 | Daughter | — | Iowa |
| 20 | Christine Zupan | 12 | Daughter | — | Iowa |
| 21 | Frank D. Gray | 61 | Head | Switchman | Iowa |
| 22 | Nell D. Gray | 59 | Wife | — | Iowa |
| 23 | Loretta Gray | 27 | Daughter | Credit Mgr. | Iowa |
| 24 | Myron F. Gray | 25 | Son | Clerk | Iowa |
| 25 | Mary A. Casey | 82 | Mother-in-law | — | New York |
| 26 | William D. Benton | 60 | Head | Engineer | Iowa |
| 27 | Alvida Benton | 59 | Wife | — | Texas |
| 28 | At The Ends Benton | 32 | Blacks | — | Sask. |
| 29 | John H. Smith | 42 | Head | Coal Miner | Iowa |
| 30 | Tressa M. Smith | 41 | Wife | — | Iowa |
| 31 | Mildred Smith | 22 | Daughter | Seamstress | Iowa |
| 32 | Arthur E. Smith | 18 | Son | Labourer | Iowa |
| 33 | Robert Smith | 16 | Son | — | Iowa |
| 34 | William Smith | 14 | Son | — | Iowa |
| 35 | Gwendolyn Smith | 13 | Daughter | — | Iowa |
| 36 | Lester Smith | 11 | Son | — | Iowa |
| 37 | Jean Smith THIS PERSON | 10 | Daughter | — | Iowa |
| 38 | Virginia Smith | 9 | Daughter | — | Iowa |
| 39 | Donald Ray Smith | 5 | Son | — | Iowa |
| 40 | Lawrence E. Scafinger | 21 | Son-in-law | Laborer | Iowa |
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)