RS
Ralph Smith — 1940 US Census Record
Model Tree available1940 United States Federal Census · Polk-County, Iowa
Our Model Tree links this Ralph Smith across the 1910, 1920, 1930 and 1940 US Censuses in Polk-County, Iowa (XGBoost, ~Confirmed), with identified parents Charles & Charles — first a head (b.~1909), then head of a 4-person household.
Age 31
b. ~1909
Male
Head
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Polk-County, Iowa |
| Surname | Smith |
| Given Name | Ralph |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Additional Details | |
| Occupation | Sandpaper |
| Industry | Steel Co |
| Class of Worker | PW |
| Hours Worked | 20 |
| Income (1939) | 400 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Sandpaper |
| Township / Ward | Des Moines City |
| Est. Birth Year | ~1909 |
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 Ralph | Age | Birth yr |
|---|---|---|---|---|
| Vanda Smith | Daughter | — | 4 | ~1936 |
| Ralph Smith | Head | — | 31 | ~1909 |
| Elsie Olney | Other | — | 56 | ~1884 |
| Vera Smith | Spouse | — | 30 | ~1910 |
Census Appearances
1910
Polk, Iowa
Son, age 1
Polk, Iowa · implied b. ~1909 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | Ralph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1920
Polk, Iowa
Son, age 12
Polk, Iowa · implied b. ~1908 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | Ralph |
| 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 | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Polk, Iowa
Son, age 21
Polk, Iowa · implied b. ~1909 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | Ralph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | Employee |
| Industry | Shoe Shop |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Polk-County, Iowa
Head, age 31
Polk-County, Iowa · implied b. ~1909 — 4 household members
| Surname | Smith |
| Given Name | Ralph |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Occupation | Sandpaper |
| Industry | Steel Co |
| Class of Worker | PW |
| Hours Worked | 20 |
| Income (1939) | 400 |
| 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 Ralph Smith across 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Charles Smith (~0.92 confidence) and father Charles Smith (~0.92 confidence) and mother Flora Smith (~0.92 confidence) and mother Flora Smith (~0.92 confidence) and mother Anna Smith (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Charles Smith
b. ~1880
Source father
● Household
· direct · ~0.92
Father
Charles Smith
b. ~1880
Source father
● Household
· direct · ~0.92
Mother
Flora Smith
b. ~1883
Source mother
● Household
· direct · ~0.92
Mother
Flora Smith
b. ~1883
Source mother
● Household
· direct · ~0.92
Mother
Anna Smith
b. ~1886
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Ralph Smith
Head · 1940 · age 31 · b. ~1909 · 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 — 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-t0627-01197-00150)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Julia Ann Ryan | 1 | Daughter | — | Iowa |
| 42 | Bert Box | 44 | Head | Mill Worker | Iowa |
| 43 | Anna Box | 44 | Wife | — | Iowa |
| 44 | Ray Jones | 44 | Head | Carpenter | Iowa |
| 45 | Ella Jones | 44 | Wife | — | Kentucky |
| 46 | Dorothy Jones | 14 | Daughter | — | Iowa |
| 47 | Franklin Jones | 10 | Son | — | Iowa |
| 48 | Russell Jones | 9 | Son | — | Iowa |
| 49 | Jean Jones | 7 | Daughter | — | Iowa |
| 50 | Shirley Jones | 5 | Daughter | — | Iowa |
| 51 | Elmer Conogill | 45 | Head | Laborer | Iowa |
| 52 | Susan Conogill | 36 | Wife | Seamstress | Iowa |
| 53 | Clifford Conogill | 12 | Son | — | Iowa |
| 54 | Mary Jane Conogill | 10 | Daughter | — | Iowa |
| 55 | Will Conogill | 51 | Brother | Laborer | Iowa |
| 56 | Carroll Hewit | 24 | Head | Laborer | Iowa |
| 57 | Helen Hewit | 20 | Wife | — | Missouri |
| 58 | Frank O'Farrell | 20 | Head | Laborer | Iowa |
| 59 | Bernice O'Farrell | 17 | Wife | Floor Girl | Iowa |
| 60 | Billy Boy Meely | 2 | Son | — | Iowa |
| 61 | Johnie Foster | 24 | Head | Trucker | Minnesota |
| 62 | Helen Foster | 23 | Wife | — | Iowa |
| 63 | James Foster | 2 | Son | — | Iowa |
| 64 | Lillian Foster | 18 | Sister | — | Iowa |
| 65 | George Turgent | 29 | Head | Miner | Iowa |
| 66 | Naomi Turgent | 20 | Wife | — | Kansas |
| 67 | Marjorie Turgent | 3 | Daughter | — | Iowa |
| 68 | John Turgent | 1 | Son | — | Iowa |
| 69 | Wallace Turgent | 0 | Son | — | Iowa |
| 70 | Phillip Morales | 44 | Head | Shoe Repair | Mexico |
| 71 | Daisy Morales | 45 | Wife | — | Iowa |
| 72 | Wayne Morales | 15 | Son | — | Iowa |
| 73 | Betty Mae Morales | 13 | Daughter | — | Iowa |
| 74 | Richard Morales | 11 | Son | — | Iowa |
| 75 | Ida Caulkins | 60 | Head | — | Iowa |
| 76 | Ida Fox | 78 | Head | — | Indiana |
| 77 | Ralph Smith THIS PERSON | 31 | Head | Sandpaper | Iowa |
| 78 | Vera Smith | 30 | Wife | — | Oklahoma |
| 79 | Vanda Smith | 4 | Daughter | — | Iowa |
| 80 | Elsie Olney | 56 | Sister | — | Iowa |
Pedigree Summary
Ralph
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)