CS
Carol Smith — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Marion-County, Iowa
Our Model Tree links this Carol Smith across the 1930 and 1940 US Censuses in Marion-County, Iowa (XGBoost, ~Confirmed) — first a daughter (b.~1929), then head of a 4-person household.
Age 11
b. ~1929
Female
Daughter
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Marion-County, Iowa |
| Surname | Smith |
| Given Name | Carol June |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Knoxville City |
| 1935 Residence (County) | Marion |
| Additional Details | |
| Highest Grade | No 5 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Knoxville City |
| Est. Birth Year | ~1929 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Carol | Age | Birth yr |
|---|---|---|---|---|
| Adda Smith | Spouse | — | 34 | ~1906 |
| Carol Smith | Daughter | — | 11 | ~1929 |
| Rea Smith | Daughter | — | 5 | ~1935 |
| Charlie Smith | Head | — | 39 | ~1901 |
Census Appearances
1930
Marion, Iowa
Daughter, age 1
Marion, Iowa · implied b. ~1929 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | Carol J. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Missouri |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Marion-County, Iowa
Daughter, age 11
Marion-County, Iowa · implied b. ~1929 — 4 household members
| Surname | Smith |
| Given Name | Carol June |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Knoxville City |
| 1935 Residence (County) | Marion |
| Highest Grade | No 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 Carol Smith across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Carol Smith
Daughter · 1940 · age 11 · b. ~1929 · Iowa
★ You are viewing this record
Sibling
Rea 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 — Marion-County, Iowa
Open full size
1940 US Federal Census — Marion-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01181-00250)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Harold W. Clements | 2 | Son | — | Iowa |
| 2 | Charlie H. Smith | 39 | Head | Laborer | Iowa |
| 3 | Adda Smith | 34 | Wife | — | Missouri |
| 4 | Carol June Smith THIS PERSON | 11 | Daughter | — | Iowa |
| 5 | Rea Jean Smith | 5 | Daughter | — | Iowa |
| 6 | Ida Young | 82 | Head | Civil War Pension | Iowa |
| 7 | Kenneth Durham | 24 | Head | Salesman | Iowa |
| 8 | Geraldine Durham | 21 | Wife | — | Iowa |
| 9 | Harold Clements | 47 | Head | Lawyer | Iowa |
| 10 | Ruth Clements | 44 | Wife | — | Iowa |
| 11 | Powell Himes | 89 | Father | Owns Farm | Iowa |
| 12 | Jess Nichols | 35 | Head | Baker | Iowa |
| 13 | Nellie Nichols | 32 | Wife | — | Iowa |
| 14 | Joe Chirvers | 55 | Father | Miner | England |
| 15 | Margaret Chirvers | 53 | Mother | — | Iowa |
| 16 | Del Galvin | 37 | Head | Stenographer | Iowa |
| 17 | Muriel Galvin | 38 | Wife | — | Iowa |
| 18 | Billy Galvin | 17 | Son | — | Iowa |
| 19 | Leslie Galvin | 9 | Son | — | Iowa |
| 20 | Gertrude Dunlap | 44 | Head | Saleslady | Iowa |
| 21 | Billy Dunlap | 18 | Son | — | Iowa |
| 22 | William Freeman | 76 | Father | — | England |
| 23 | Clara S. Hoffman | 51 | Head | Manager | Iowa |
| 24 | Vaakti Hickey | 81 | Mother | — | New York |
| 25 | O. J. Metcalf | 49 | Head | Barber | Iowa |
| 26 | Beulah Metcalf | 53 | Wife | — | Iowa |
| 27 | Billy Metcalf | 22 | Son | — | Iowa |
| 28 | Ellis W. Snow | 47 | Head | Attendant | Missouri |
| 29 | Pearl E. Snow | 41 | Wife | — | Oklahoma |
| 30 | Dee Snow | 7 | Son | — | Missouri |
| 31 | Henry Donald | 34 | Head | Teacher | Iowa |
| 32 | Mildred Donald | 32 | Wife | — | Iowa |
| 33 | David Donald | 3 | Son | — | Missouri |
| 34 | John T. Smith | 41 | Head | Chauffeur | Iowa |
| 35 | Ella Smith | 36 | Wife | Book-Keeper | Iowa |
| 36 | Ontwein Hillont | 53 | Head | Attendant | France |
| 37 | Marie Hillont | 44 | Wife | — | Iowa |
| 38 | C. A. Boylan | 51 | Head | Cafe | Iowa |
| 39 | Ruby Boylan | 39 | Wife | Helper | Iowa |
| 40 | Richard Boylan | 17 | Son | — | 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)