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John Arnold — 1940 US Census Record
Model Tree available1940 United States Federal Census · Polk-County, Iowa
Our Model Tree links this John Arnold across the 1920, 1930 and 1940 US Censuses in Polk-County, Iowa (XGBoost, ~Confirmed), with identified parents George & George — first a head (b.~1910), then head of a 3-person household.
Age 30
b. ~1910
Male
Head
Born: Colorado
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Polk-County, Iowa |
| Surname | Arnold |
| Given Name | John W. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Colorado |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Additional Details | |
| Occupation | Salesman |
| Industry | General Insurance |
| Class of Worker | PW |
| Hours Worked | 54 |
| Income (1939) | 2748 |
| Highest Grade | H 4 |
| 1935 Residence | Same Place |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
| Occupation | Salesman |
| 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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Mary Arnold | Daughter | — | 2 | ~1938 |
| John Arnold | Head | — | 30 | ~1910 |
| Bonnie Arnold | Spouse | — | 25 | ~1915 |
Census Appearances
1920
Polk, Iowa
Son, age 9
Polk, Iowa · implied b. ~1911 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Arnold |
| Given Name | Jack W |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Colorado |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1930
Polk, Iowa
Son, age 20
Polk, Iowa · implied b. ~1910 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Arnold |
| Given Name | John W |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Colorado |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1940
Polk-County, Iowa
Head, age 30
Polk-County, Iowa · implied b. ~1910 — 3 household members
| Surname | Arnold |
| Given Name | John W. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Colorado |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Occupation | Salesman |
| Industry | General Insurance |
| Class of Worker | PW |
| Hours Worked | 54 |
| Income (1939) | 2748 |
| Highest Grade | H 4 |
| 1935 Residence | Same Place |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
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 Arnold across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father George Arnold (~0.92 confidence) and father George Arnold (~0.92 confidence) and mother Rae Arnold (~0.92 confidence) and mother Rose Arnold (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
George Arnold
b. ~1888
Source father
● Household
· direct · ~0.92
Father
George Arnold
b. ~1888
Source father
● Household
· direct · ~0.92
Mother
Rae Arnold
b. ~1891
Source mother
● Household
· direct · ~0.92
Mother
Rose Arnold
b. ~1892
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Arnold
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-t0627-01193-00617)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Raymond Hanson | 32 | Head | General Agent | Iowa |
| 42 | Nelle Hanson | 32 | Wife | — | Iowa |
| 43 | Virginia Hanson | 2 | Daughter | — | Iowa |
| 44 | John Heerema | 52 | Head | Traveling Salesman | Holland |
| 45 | Alena Heerema | 53 | Wife | — | Iowa |
| 46 | Virginia Heerema | 19 | Daughter | New Worker | Iowa |
| 47 | F. G. Miller | 57 | Head | Salesman | Illinois |
| 48 | Sarah Miller | 57 | Wife | — | Illinois |
| 49 | Albert F. Meyer | 44 | Head | Traveling Salesman | Ohio |
| 50 | Maria H. Meyer | 43 | Wife | — | Ohio |
| 51 | Lois Jean Meyer | 15 | Daughter | — | Iowa |
| 52 | Albert J. Meyer | 11 | Son | — | Iowa |
| 53 | Ray Law | 43 | Head | Salesman | Michigan |
| 54 | Elizabeth Law | 43 | Wife | — | Michigan |
| 55 | Kathleen Law | 11 | Daughter | — | Michigan |
| 56 | Jimmie B. Law | 9 | Son | — | Indiana |
| 57 | Hilda Solberg | 27 | Maid | Maid | Iowa |
| 58 | Mose M. Cohen | 48 | Head | Salesman | Iowa |
| 59 | Hazel D. Cohen | 48 | Wife | — | Iowa |
| 60 | Marie Aldrich | 45 | Maid | Maid | Nebraska |
| 61 | Fred Schwob | 45 | Head | Chief Clerk To Chief Conservator | Iowa |
| 62 | Nita Schwob | 45 | Wife | — | Iowa |
| 63 | Arlene Schwob | 20 | Daughter | — | Iowa |
| 64 | Theodore Schwob | 70 | Father | — | Switzerland |
| 65 | Lucy Schwob | 64 | Mother | — | Missouri |
| 66 | William A. Groth | 41 | Head | Salesman | Iowa |
| 67 | Alice B. Groth | 35 | Wife | — | Iowa |
| 68 | Willard D. Groth | 15 | Son | — | Iowa |
| 69 | Nancy Lee Groth | 2 | Daughter | — | Iowa |
| 70 | Bruce Campbell | 27 | Head | Salesman | Iowa |
| 71 | Jacqueline Campbell | 26 | Wife | — | Minnesota |
| 72 | Douglas Morton Campbell | 1 | Son | — | Iowa |
| 73 | John W. Arnold THIS PERSON | 30 | Head | Salesman | Colorado |
| 74 | Bonnie L. Arnold | 25 | Wife | — | Iowa |
| 75 | Mary Suzanne Arnold | 2 | Daughter | — | Iowa |
| 76 | William Anders | 50 | Head | Clerk | North Carolina |
| 77 | Hazel Anders | 51 | Wife | — | Iowa |
| 78 | William S. Anders | 17 | Son | Clerk | Iowa |
| 79 | Hugh R. Smith | 46 | Head | Salesman | Iowa |
| 80 | Alma Smith | 46 | Wife | — | Iowa |
Pedigree Summary
John
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)