JC
John Calhoun — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Polk-County, Iowa
Our Model Tree links this John Calhoun across the 1930 and 1940 US Censuses in Polk-County, Iowa (XGBoost, ~Confirmed) — first a head (b.~1910), then head of a 4-person household.
Age 30
b. ~1910
Male
Head
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Polk-County, Iowa |
| Surname | Calhoun |
| Given Name | John H |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Additional Details | |
| Occupation | Mechanic |
| Industry | Building Construction |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 2239 |
| Highest Grade | H 4 |
| 1935 Residence | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Mechanic |
| Township / Ward | Des Moines City |
| Est. Birth Year | ~1910 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Jo Calhoun | Daughter | — | 4 | ~1936 |
| Nona Calhoun | Spouse | — | 28 | ~1912 |
| John Calhoun | Head | — | 30 | ~1910 |
| John Calhoun | Son | — | 2 | ~1938 |
Census Appearances
1930
Polk, Iowa
Son, age 20
Polk, Iowa · implied b. ~1910 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Calhoun |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Michigan |
| Occupation | Employee |
| Industry | Asbestos Co |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Polk-County, Iowa
Head, age 30
Polk-County, Iowa · implied b. ~1910 — 4 household members
| Surname | Calhoun |
| Given Name | John H |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Occupation | Mechanic |
| Industry | Building Construction |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 2239 |
| Highest Grade | H 4 |
| 1935 Residence | Iowa |
| 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 John Calhoun across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Calhoun
Head · 1940 · age 30 · b. ~1910 · 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-t0627-01196-00146)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Eva Cox | 63 | wife | — | Ohio |
| 2 | Raymond Bailey | 38 | head | Finisher | Iowa |
| 3 | Alice Bailey | 36 | wife | — | Iowa |
| 4 | Muriel Bailey | 13 | daughter | — | Iowa |
| 5 | Thomas Bailey | 9 | son | — | Iowa |
| 6 | Bonnie Bailey | 4 | daughter | — | Iowa |
| 7 | Raymond Bailey | 2 | son | — | Iowa |
| 8 | John H Calhoun THIS PERSON | 30 | head | Mechanic | Iowa |
| 9 | Nona Calhoun | 28 | wife | — | Illinois |
| 10 | Jo Ann Calhoun | 4 | daughter | — | Iowa |
| 11 | John R Calhoun | 2 | son | — | Iowa |
| 12 | Ray Doop | 39 | head | Salesman | Iowa |
| 13 | Mildred Doop | 36 | wife | Registered Nurse | Iowa |
| 14 | Gerald Doop | 13 | son | — | Iowa |
| 15 | Ray Doop | 11 | son | — | Iowa |
| 16 | James Doop | 2 | son | — | Iowa |
| 17 | Frank M Scalise | 43 | head | Ornamental Iron Worker | Italy |
| 18 | Madeline Scalise | 36 | wife | — | Italy |
| 19 | Michael Scalise | 16 | son | — | Iowa |
| 20 | Carl Scalise | 14 | son | — | Iowa |
| 21 | Mary Scalise | 11 | daughter | — | Iowa |
| 22 | Gloria Scalise | 8 | daughter | — | Iowa |
| 23 | Anna Ladorna | 57 | sister | Power Machine Operator | Italy |
| 24 | Seward Reese | 41 | head | Mechanic | Nebraska |
| 25 | Elvera Reese | 37 | wife | — | Iowa |
| 26 | James Reese | 9 | son | — | Iowa |
| 27 | Dora D Burns | 48 | head | Registered Nurse | Tennessee |
| 28 | Herbert A Hensler | 36 | head | Record Clerk | Iowa |
| 29 | Cecile Hensler | 32 | wife | — | Iowa |
| 30 | Lawrence Brainard | 31 | head | Teacher | Illinois |
| 31 | Jane Brainard | 26 | wife | — | Illinois |
| 32 | Robert Brainard | 2 | son | — | Iowa |
| 33 | John Mcpherson | 26 | head | Truck Driver | Iowa |
| 34 | Lavonne Mcpherson | 23 | wife | — | Iowa |
| 35 | John Mcpherson | 4 | son | — | Iowa |
| 36 | David Mcpherson | 1 | son | — | Iowa |
| 37 | Henry Martinson | 59 | head | Carpenter | Nebraska |
| 38 | Alice Martinson | 54 | wife | — | Sweden |
| 39 | Clifford Gray | 41 | head | Painter | Missouri |
| 40 | Goldie Gray | 40 | wife | — | Missouri |
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)