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Jack Smith — 1940 US Census Record
Model Tree available1940 United States Federal Census · Dallas-County, Iowa
Our Model Tree links this Jack Smith across the 1920, 1930 and 1940 US Censuses in Dallas-County, Iowa (XGBoost, ~Confirmed), with identified parents Charles & Charles — first a son (b.~1918), then head of a 3-person household.
Age 22
b. ~1918
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Dallas-County, Iowa |
| Surname | Smith |
| Given Name | Jack H |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Union Twp. |
| 1935 Residence (County) | Dallas |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 52 |
| Income (1939) | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Farmer |
| Township / Ward | Union Twp |
| Est. Birth Year | ~1918 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Jack | Age | Birth yr |
|---|---|---|---|---|
| Charles Smith | Head | — | 56 | ~1884 |
| Jack Smith | Son | — | 22 | ~1918 |
| Mae Smith | Spouse | — | 55 | ~1885 |
Census Appearances
1920
Linn, Iowa
Son, age 2
Linn, Iowa · implied b. ~1918 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | Jack H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Dallas, Iowa
Son, age 12
Dallas, Iowa · implied b. ~1918 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | Jack H |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Dallas-County, Iowa
Son, age 22
Dallas-County, Iowa · implied b. ~1918 — 3 household members
| Surname | Smith |
| Given Name | Jack H |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Union Twp. |
| 1935 Residence (County) | Dallas |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 52 |
| Income (1939) | 0 |
| Highest Grade | Hs 4 |
| 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 Jack Smith across 3 US Census years (1920, 1930 and 1940) in 3 locations, using XGBoost record linkage. Identified parents: father Charles Smith (~0.92 confidence) and father Charles Smith (~0.92 confidence) and father Charles Smith (~0.92 confidence) and mother Mae Smith (~0.92 confidence) and mother Flossie Smith (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Charles Smith
b. ~1884
Source father
● Household
· direct · ~0.92
Father
Charles Smith
b. ~1884
Source father
● Household
· direct · ~0.92
Father
Charles Smith
b. ~1885
Source father
● Household
· direct · ~0.92
Mother
Mae Smith
b. ~1885
Source mother
● Household
· direct · ~0.92
Mother
Flossie Smith
b. ~1885
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Jack Smith
Son · 1940 · age 22 · b. ~1918 · Iowa
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Dallas-County, Iowa
Open full size
1940 US Federal Census — Dallas-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01153-00641)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Ira C Wiley | 75 | Head | — | Illinois |
| 42 | Bernice A Wiley | 48 | Sister | — | Nebraska |
| 43 | Nicholas E Wacht | 69 | Head | Farmer | Iowa |
| 44 | Vinnie N Wacht | 46 | Wife | — | Iowa |
| 45 | Loren E Wacht | 26 | Son | Farmer | Iowa |
| 46 | Opal M Wacht | 24 | Daughter | — | Iowa |
| 47 | Wayne N Wacht | 18 | Son | — | Iowa |
| 48 | Erma A Wacht | 8 | Daughter | — | Iowa |
| 49 | Willis Laughlin | 63 | Head | Laborer | Pennsylvania |
| 50 | Essie Laughlin | 56 | Wife | New Worker | Iowa |
| 51 | Ava Mae Laughlin | 20 | Daughter | Housework | Iowa |
| 52 | Charles H Smith | 56 | Head | Farmer | Iowa |
| 53 | Mae O Smith | 55 | Wife | — | Iowa |
| 54 | Jack H Smith THIS PERSON | 22 | Son | Farmer | Iowa |
| 55 | Randel P Wallert | 34 | Head | Truck Operator | Iowa |
| 56 | Irene M Wallert | 34 | Wife | — | Iowa |
| 57 | Donna Belle Wallert | 14 | Daughter | — | Iowa |
| 58 | Ronald J Wallert | 11 | Son | — | Iowa |
| 59 | Edward E Wallert | 9 | Son | — | Iowa |
| 60 | Russell B Wallert | 7 | Son | — | Iowa |
| 61 | Dorothy R Wallert | 3 | Daughter | — | Iowa |
| 62 | Russell L Robinson | 49 | Head | Farmer | Missouri |
| 63 | Laura A Robinson | 40 | Wife | — | Iowa |
| 64 | Clyde L Robinson | 8 | Son | — | Iowa |
| 65 | Nancy Jane Robinson | 4 | Daughter | — | Iowa |
| 66 | James Ulieger | 33 | Head | Farmer | Iowa |
| 67 | Dorothy O Ulieger | 37 | Wife | — | Iowa |
| 68 | Paul L Ulieger | 6 | Son | — | Iowa |
| 69 | Imogene Ulieger | 3 | Daughter | — | Iowa |
| 70 | Junior Ulieger | 0 | Son | — | Iowa |
| 71 | Clark W Neff | 38 | Head | Farmer | Iowa |
| 72 | Esther I Neff | 29 | Wife | — | Iowa |
| 73 | Clyde M Bennett | 67 | Head | Farmer | Iowa |
| 74 | Nellie N Bennett | 69 | Wife | — | Iowa |
| 75 | Ora E Ross | 43 | Head | Farmer | Missouri |
| 76 | Gladys P Ross | 30 | Wife | — | Iowa |
| 77 | Donna M Ross | 17 | Daughter | — | Iowa |
| 78 | Ira L Ross | 13 | Son | — | Iowa |
| 79 | Gaston E Ross | 7 | Son | — | Iowa |
| 80 | Lloyd A Short | 26 | Head | Farmer | Iowa |
Pedigree Summary
Jack
Gen 1 · 5 parents
~0.92
Max depth 4 (1900–1950 window)
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)