PS
Peter Smith — 1940 US Census Record
Model Tree available1940 United States Federal Census · Hamilton-County, Iowa
Our Model Tree links this Peter Smith across the 1920, 1930 and 1940 US Censuses in Hamilton-County, Iowa (XGBoost, ~Confirmed), with identified parents Peter & Pete — first a son (b.~1918), then head of a 4-person household.
Age 22
b. ~1918
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Hamilton-County, Iowa |
| Surname | Smith |
| Given Name | Peter |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Williams Township |
| 1935 Residence (County) | Hamilton |
| Additional Details | |
| Occupation | Laborer |
| Industry | Farm |
| Class of Worker | NP |
| Hours Worked | 70 |
| Income (1939) | 888 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Laborer |
| Township / Ward | Williams Township |
| 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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Peter | Age | Birth yr |
|---|---|---|---|---|
| Pete Smith | Head | — | 78 | ~1862 |
| Peter Smith | Son | — | 22 | ~1918 |
| Donald Smith | Son | — | 26 | ~1914 |
| Nellie Smith | Spouse | — | 68 | ~1872 |
Census Appearances
1920
Hamilton, Iowa
Son, age 2
Hamilton, Iowa · implied b. ~1918 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | Peter |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Wisconsin |
| Mother's Birthplace | Illinois |
| Can Read | No |
| Can Write | No |
| Speaks English | No |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Hamilton, Iowa
Son, age 13
Hamilton, Iowa · implied b. ~1917 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | Peter |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Wisconsin |
| Mother's Birthplace | Illinois |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Hamilton-County, Iowa
Son, age 22
Hamilton-County, Iowa · implied b. ~1918 — 4 household members
| Surname | Smith |
| Given Name | Peter |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Williams Township |
| 1935 Residence (County) | Hamilton |
| Occupation | Laborer |
| Industry | Farm |
| Class of Worker | NP |
| Hours Worked | 70 |
| Income (1939) | 888 |
| Highest Grade | No 8 |
| 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 Peter Smith across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Peter Smith (~0.92 confidence) and father Pete Smith (~0.92 confidence) and father Peter Smith (~0.92 confidence) and mother Nellie Smith (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Peter Smith
b. ~1854
Source father
● Household
· direct · ~0.92
Father
Pete Smith
b. ~1862
Source father
● Household
· direct · ~0.92
Father
Peter Smith
b. ~1862
Source father
● Household
· direct · ~0.92
Mother
Nellie Smith
b. ~1872
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Peter Smith
Son · 1940 · age 22 · b. ~1918 · Iowa
★ You are viewing this record
Sibling
Donald Smith
Sibling · 1940 · age 26
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 — Hamilton-County, Iowa
Open full size
1940 US Federal Census — Hamilton-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01164-00581)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Pete C. Smith | 78 | Head | Operator | Wisconsin |
| 2 | Nellie Smith | 68 | Wife | — | Illinois |
| 3 | Donald Smith | 26 | Son | Operator | Iowa |
| 4 | Peter Smith THIS PERSON | 22 | Son | Laborer | Iowa |
| 5 | Richard Blankenburg | 55 | Head | Operator | Illinois |
| 6 | Alvina Blankenburg | 57 | Sister | Raising Chicken | Illinois |
| 7 | John Blankenburg | 53 | Brother | Partnership Operator | Illinois |
| 8 | Nancy Blankenburg | 78 | Aunt | — | Illinois |
| 9 | Doris Blankenburg | 19 | Niece | — | Iowa |
| 10 | William M. Whistler | 36 | Head | Laborer | Iowa |
| 11 | Gladys Whistler | 33 | Wife | Operator | Iowa |
| 12 | Irene Whistler | 0 | Daughter | — | Iowa |
| 13 | Chester R. Henick | 44 | Head | Operator | Iowa |
| 14 | Estella Henick | 45 | Wife | — | Iowa |
| 15 | Doris Jean Henick | 15 | Daughter | — | Iowa |
| 16 | Francis Whitty | 30 | Head | Operator | Iowa |
| 17 | Helen Whitty | 28 | Wife | — | Iowa |
| 18 | Anna Sullivan | 68 | Head | — | Ireland |
| 19 | Rachpole, Helen Sullivan | 30 | Servant | Servant | Iowa |
| 20 | Edward Stockman | 42 | Head | Operator | Iowa |
| 21 | Roy A. Fowler | 52 | Head | Operator | Iowa |
| 22 | Elizabeth Fowler | 53 | Wife | — | New York |
| 23 | Morris Fowler | 18 | Son | Laborer | Iowa |
| 24 | Francis Harold Fowler | 22 | Head | Laborer | Iowa |
| 25 | Ardath Fowler | 21 | Wife | Housewife | Iowa |
| 26 | Sandra Fowler | 1 | Daughter | — | Iowa |
| 27 | Lester Weatherwax | 32 | Head | Laborer | Missouri |
| 28 | Lora Weatherwax | 23 | Wife | — | Arkansas |
| 29 | Booker, Beatrice Weatherwax | 15 | Sister-in-law | — | Missouri |
| 30 | Lee R. Weir | 39 | Head | Operator | Iowa |
| 31 | Nina Weir | 39 | Wife | Housewife | Iowa |
| 32 | Eleanor Weir | 17 | Daughter | — | Iowa |
| 33 | Charles A. Burket | 35 | Head | Operator | Iowa |
| 34 | Bernice Burket | 30 | Wife | — | Illinois |
| 35 | Norman Burket | 7 | Son | — | Iowa |
| 36 | Dick H. Olden | 43 | Head | Operator | Iowa |
| 37 | Anna Olden | 40 | Wife | — | Iowa |
| 38 | Richard Olden | 10 | Son | — | Iowa |
| 39 | Merlin Olden | 5 | Son | — | Iowa |
| 40 | Gene Bowers | 76 | Father-in-law | — | Iowa |
Related Census Records
Pedigree Summary
Peter + 1 sibling
Gen 1 · 4 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)