RK
Robert King — 1940 US Census Record
Model Tree available1940 United States Federal Census · Polk-County, Iowa
Our Model Tree links this Robert King across the 1920, 1930 and 1940 US Censuses in Polk-County, Iowa (XGBoost, ~Confirmed), with identified parents Harry & Iva — first a son (b.~1920), then head of a 8-person household.
Age 20
b. ~1920
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Polk-County, Iowa |
| Surname | King |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Additional Details | |
| Occupation | Delivery boy |
| Industry | Delivery service |
| Class of Worker | PW |
| Hours Worked | 50 |
| Income (1939) | 432 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Delivery Boy |
| Township / Ward | Des Moines City |
| Est. Birth Year | ~1920 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Dorothy King | Daughter | — | 17 | ~1923 |
| Helen King | Daughter | — | 15 | ~1925 |
| Harry King | Head | — | 58 | ~1882 |
| Alfred King | Son | — | 22 | ~1918 |
| Floyd King | Son | — | 14 | ~1926 |
| Robert King | Son | — | 20 | ~1920 |
| Raymond King | Son | — | 18 | ~1922 |
| Iva King | Spouse | — | 47 | ~1893 |
Census Appearances
1920
Polk, Iowa
Son, age
Polk, Iowa · implied b. ~1920 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | King |
| Given Name | Robert H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Polk, Iowa
Son, age 10
Polk, Iowa · implied b. ~1920 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | King |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Polk-County, Iowa
Son, age 20
Polk-County, Iowa · implied b. ~1920 — 8 household members
| Surname | King |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Occupation | Delivery boy |
| Industry | Delivery service |
| Class of Worker | PW |
| Hours Worked | 50 |
| Income (1939) | 432 |
| Highest Grade | H-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 Robert King across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Harry King (~0.92 confidence) and mother Iva King (~0.92 confidence) and mother Dorothy King (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Harry King
b. ~1883
Source father
● Household
· direct · ~0.92
Mother
Iva King
b. ~1893
Source mother
● Household
· direct · ~0.92
Mother
Dorothy King
b. ~1894
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert King
Son · 1940 · age 20 · b. ~1920 · Iowa
★ You are viewing this record
Sibling
Alfred King
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy King
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Floyd King
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen King
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Raymond King
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
40 people indexed on this census page (nara:1940:m-t0627-01195-01047)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Mary V. Cutler | 34 | Head | — | Iowa |
| 42 | Ralph C. Cutler | 14 | Son | — | Iowa |
| 43 | Elizabeth J. Cutler | 11 | Daughter | — | Iowa |
| 44 | Richard J. Cutler | 9 | Son | — | Iowa |
| 45 | Joe Ferraro | 46 | Head | Proprietor | Italy |
| 46 | Mary Ferraro | 31 | Wife | — | Italy |
| 47 | Mary A. Ferraro | 6 | Son | — | Iowa |
| 48 | Esther M. Ferraro | 5 | Daughter | — | Iowa |
| 49 | Frances J. Ferraro | 3 | Daughter | — | Iowa |
| 50 | Joanne Ferraro | 1 | Daughter | — | Iowa |
| 51 | Anthony Moro | 46 | Head | Cook | Italy |
| 52 | Ines M. Moro | 29 | Wife | — | Iowa |
| 53 | Delia M. Moro | 7 | Daughter | — | Iowa |
| 54 | Marie N. Moro | 5 | Daughter | — | Iowa |
| 55 | Matthew A. Moro | 3 | Son | — | Iowa |
| 56 | Harry W. King | 58 | Head | Proprietor Manager | Iowa |
| 57 | Iva King | 47 | Wife | Secretary | Iowa |
| 58 | Alfred King | 22 | Son | Delivery Boy | Iowa |
| 59 | Robert King THIS PERSON | 20 | Son | Delivery Boy | Iowa |
| 60 | Raymond King | 18 | Son | Delivery Boy | Iowa |
| 61 | Dorothy King | 17 | Daughter | — | Iowa |
| 62 | Helen King | 15 | Daughter | — | Iowa |
| 63 | Floyd King | 14 | Son | — | Iowa |
| 64 | Raymond A. Ellenwood | 55 | Head | Packer | Iowa |
| 65 | Rachel A. Ellenwood | 57 | Wife | — | Iowa |
| 66 | Darlene L. Ellenwood | 16 | Daughter | — | Iowa |
| 67 | William A. Kinkade | 48 | Head | Truck Driver | Iowa |
| 68 | Mary M. Kinkade | 37 | Wife | — | Iowa |
| 69 | Mary A. Kinkade | 18 | Daughter | Clerical Work | Iowa |
| 70 | William Kinkade | 13 | Son | — | Iowa |
| 71 | James Kinkade | 12 | Son | — | Iowa |
| 72 | Betty J. Connelly | 76 | Head | — | Iowa |
| 73 | Allen J. Lillian L. Connelly | 53 | Daughter | Packer | Iowa |
| 74 | John Williams | 29 | Head | Chef | Illinois |
| 75 | Ruth A. Williams | 28 | Wife | 40 | Iowa |
| 76 | Daisy Ward | 19 | Cousin | Evaporator | Michigan |
| 77 | Harry W. Helmege | 42 | Head | Nightwatchman | Iowa |
| 78 | Isabelle A. Helmege | 43 | Wife | — | Iowa |
| 79 | Jack Helmege | 21 | Son | Carpenter | Iowa |
| 80 | Archie J. Helmege | 17 | Daughter | Room Monitor | Iowa |
Related Census Records
Pedigree Summary
Robert + 5 siblings
Gen 1 · 3 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)