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Betty Smith — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Polk-County, Iowa
Our Model Tree links this Betty Smith across the 1930 and 1940 US Censuses in Polk-County, Iowa (XGBoost, ~Confirmed) — first a daughter (b.~1930), then head of a 7-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 | Betty Lou |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Additional Details | |
| Highest Grade | 5 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Des Moines City |
| 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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Betty | Age | Birth yr |
|---|---|---|---|---|
| Beverly Smith | Daughter | — | 6 | ~1934 |
| Betty Smith | Daughter | — | 10 | ~1930 |
| Ray Smith | Head | — | 32 | ~1908 |
| Jack Smith | Son | — | 8 | ~1932 |
| Raymond Smith | Son | — | 11 | ~1929 |
| Jerry Smith | Son | — | 1 | ~1939 |
| Bernice Smith | Spouse | — | 29 | ~1911 |
Census Appearances
1930
Polk, Iowa
Other, age
Polk, Iowa · implied b. ~1930 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | Betty Lou |
| Relationship to Head | Grand Daughter |
| Sex | F |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Idaho |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Polk-County, Iowa
Daughter, age 10
Polk-County, Iowa · implied b. ~1930 — 7 household members
| Surname | Smith |
| Given Name | Betty Lou |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| 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
Raymond Smith
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Beverly Smith
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jack Smith
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jerry Smith
Sibling · 1940 · age 1
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-t0627-01197-00152)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | James Staton | 30 | Head | Fireman | Iowa |
| 42 | Reginald Staton | 30 | Wife | — | Iowa |
| 43 | Chas. Staton | 28 | Head | Furnace Install | Iowa |
| 44 | Pearl Staton | 27 | Wife | — | Iowa |
| 45 | Clarabelle Staton | 8 | Daughter | — | Iowa |
| 46 | Patty Staton | 6 | Daughter | — | Iowa |
| 47 | Helene Staton | 3 | Daughter | — | Iowa |
| 48 | Marjorie Staton | 0 | Daughter | — | Iowa |
| 49 | Bert Broom | 53 | Head | Molder | Iowa |
| 50 | Elva Broom | 48 | Wife | — | Canada |
| 51 | Arleen Broom | 11 | Daughter | — | Iowa |
| 52 | John Hanson | 50 | Head | Carpenter | Iowa |
| 53 | Verna Hanson | 45 | Wife | — | Iowa |
| 54 | Ray Jacobs | 44 | Head | Carpenter | Iowa |
| 55 | Grace Jacobs | 35 | Wife | — | Iowa |
| 56 | Donald Jacobs | 17 | Son | Maid | Iowa |
| 57 | Lois Jacobs | 13 | Daughter | — | Iowa |
| 58 | Ray G. Smith | 32 | Head | Truck Driver | Iowa |
| 59 | Bernice Smith | 29 | Wife | — | Idaho |
| 60 | Raymond Smith | 11 | Son | — | Iowa |
| 61 | Betty Lou Smith THIS PERSON | 10 | Daughter | — | Iowa |
| 62 | Jack L. Smith | 8 | Son | — | Iowa |
| 63 | Beverly Lou Smith | 6 | Daughter | — | Iowa |
| 64 | Jerry Smith | 1 | Son | — | Iowa |
| 65 | Felix Janowski | 54 | Head | Laborer | Poland |
| 66 | Josephine Janowski | 45 | Wife | — | Poland |
| 67 | Leonard Janowski | 21 | Son | Stock Clerk | Iowa |
| 68 | Marion Janowski | 19 | Son | Bookgather | Iowa |
| 69 | Mary Ann Janowski | 16 | Daughter | — | Iowa |
| 70 | Arthur Janowski | 15 | Son | — | Iowa |
| 71 | Harold Cox | 27 | Head | Oil Station | Iowa |
| 72 | Ruby Cox | 25 | Wife | — | Iowa |
| 73 | Robert Cox | 3 | Son | — | Iowa |
| 74 | Harry Archibold | 35 | Head | Mechanic | Iowa |
| 75 | Agnes Archibold | 30 | Wife | — | Iowa |
| 76 | H. W. Archibold | 5 | Son | — | Iowa |
| 77 | Helen Archibold | 3 | Daughter | — | Iowa |
| 78 | James Archibold | 2 | Son | — | Iowa |
| 79 | Alta Hammer | 62 | Head | Laborer | Iowa |
| 80 | James Shiegly | 64 | Head | Laborer | Iowa |
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)