RJ
Robert Jones — 1940 US Census Record
Model Tree available1940 United States Federal Census · Polk-County, Iowa
Our Model Tree links this Robert Jones across the 1920, 1930 and 1940 US Censuses in Polk-County, Iowa (XGBoost, ~Confirmed), with identified parents Eugene & Eugene — first a son (b.~1911), then head of a 5-person household.
Age 29
b. ~1911
Male
Son
Born: Colorado
Divorced
1940 Census Record Details
| Census Year | 1940 |
| Location | Polk-County, Iowa |
| Surname | Jones |
| Given Name | Robert L |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Divorced |
| Birthplace | Colorado |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Additional Details | |
| Occupation | Tire Builder |
| Industry | Tire Rubber Company |
| Class of Worker | PW |
| Hours Worked | 30 |
| Income (1939) | 200 |
| Highest Grade | No 3 |
| 1935 Residence | Same place |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
| Occupation | Tire Builder |
| Township / Ward | Des Moines City |
| Est. Birth Year | ~1911 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Eugene Jones | Head | — | 59 | ~1881 |
| Willis Jones | Son | — | 18 | ~1922 |
| Robert Jones | Son | — | 29 | ~1911 |
| Willard Jones | Son | — | 18 | ~1922 |
| Mary Jones | Spouse | — | 56 | ~1884 |
Census Appearances
1920
Story, Iowa
Son, age 8
Story, Iowa · implied b. ~1912 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jones |
| Given Name | Robert L |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Colorado |
| Father's Birthplace | Iowa |
| Mother's Birthplace | South Dakota |
| Occupation | none |
| Speaks English | Yes |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1930
Polk, Iowa
Son, age 19
Polk, Iowa · implied b. ~1911 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jones |
| Given Name | Robert L. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Colorado |
| Father's Birthplace | Iowa |
| Mother's Birthplace | South Dakota |
| Occupation | Truck driver |
| Industry | Sand Pit |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1940
Polk-County, Iowa
Son, age 29
Polk-County, Iowa · implied b. ~1911 — 5 household members
| Surname | Jones |
| Given Name | Robert L |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Divorced |
| Birthplace | Colorado |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Occupation | Tire Builder |
| Industry | Tire Rubber Company |
| Class of Worker | PW |
| Hours Worked | 30 |
| Income (1939) | 200 |
| Highest Grade | No 3 |
| 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 Robert Jones across 3 US Census years (1920, 1930 and 1940) in 3 locations, using XGBoost record linkage. Identified parents: father Eugene Jones (~0.92 confidence) and father Eugene Jones (~0.92 confidence) and father Eugene Jones (~0.92 confidence) and mother Mary Jones (~0.92 confidence) and mother Mary Jones (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Eugene Jones
b. ~1881
Source father
● Household
· direct · ~0.92
Father
Eugene Jones
b. ~1881
Source father
● Household
· direct · ~0.92
Father
Eugene Jones
b. ~1880
Source father
● Household
· direct · ~0.92
Mother
Mary Jones
b. ~1890
Source mother
● Household
· direct · ~0.92
Mother
Mary Jones
b. ~1884
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Jones
Son · 1940 · age 29 · b. ~1911 · Iowa
★ You are viewing this record
Sibling
Willis Jones
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Willard Jones
Sibling · 1940 · age 18
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 — Polk-County, Iowa
Open full size
1940 US Federal Census — Polk-County, Iowa
Page Contents
38 people indexed on this census page (nara:1940:m-t0627-01197-00399)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Clydet Vazel | 29 | Head | Farm Hand | Iowa |
| 42 | Elsie H Vazel | 26 | Wife | — | Iowa |
| 43 | Phillip E Vazel | 5 | Son | — | Iowa |
| 44 | Gaylord E Hooker | 25 | Head | Station Attendant | Iowa |
| 45 | Dorothy May Hooker | 24 | Wife | — | Iowa |
| 46 | Homer Jones | 68 | Head | Farmer | Iowa |
| 47 | Eugene Jones | 59 | Head | Farmer | Iowa |
| 48 | Mary B Jones | 56 | Wife | — | South Dakota |
| 49 | Robert L Jones THIS PERSON | 29 | Son | Tire Builder | Colorado |
| 50 | Willard W Jones | 18 | Son | Farmer | Iowa |
| 51 | Willis D Jones | 18 | Son | Farmer | Iowa |
| 52 | Wyatt H Murray | 74 | Head | Farming | Minnesota |
| 53 | Rollie O Myers | 28 | Head | Farm Hand | Iowa |
| 54 | Ruby M Myers | 20 | Wife | — | Iowa |
| 55 | Frank M Ellis | 45 | Head | Farmer | Iowa |
| 56 | Buda M Ellis | 41 | Wife | — | Iowa |
| 57 | Evelyn M Ellis | 10 | Daughter | — | Iowa |
| 58 | Richard M Ellis | 7 | Son | — | Iowa |
| 59 | Anna M Ellis | 1 | Daughter | — | Iowa |
| 60 | Albert M Gray | 29 | Head | Farm Hand | Iowa |
| 61 | Mary M Gray | 24 | Wife | — | Missouri |
| 62 | Barbara A Gray | 1 | Daughter | — | Iowa |
| 63 | Edward F Gray | 0 | Son | — | Iowa |
| 65 | Earl Z Cook | 50 | Head | Crane Operator | Iowa |
| 66 | Vera F Cook | 48 | Wife | — | Indiana |
| 67 | Albert E Cook | 14 | Son | — | Florida |
| 68 | William J Cook | 11 | Son | — | Iowa |
| 69 | Harold D Cook | 10 | Son | — | Iowa |
| 70 | Ted R Gay | 35 | Head | Night Man | Missouri |
| 71 | Maude J Gay | 28 | Wife | — | Missouri |
| 72 | T. Kyle Gay | 5 | Son | — | Missouri |
| 73 | Ernest Weishaar | 77 | Head | Retired Merchant | Illinois |
| 74 | Maud M Weishaar | 71 | Wife | — | Illinois |
| 76 | George W Redhead | 76 | Head | Farmer | Iowa |
| 77 | Annie L Redhead | 73 | Wife | — | California |
| 78 | Lewis Schaffer | 46 | Lodger | Farm Hand | Illinois |
| 79 | George F Redhead | 36 | Son | Mechanic | Iowa |
| 80 | Helen L Redhead | 36 | Daughter | Chemist | Iowa |
Pedigree Summary
Robert + 2 siblings
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)