RD
Ralph Davis — 1940 US Census Record
Model Tree available1940 United States Federal Census · Polk-County, Iowa
Our Model Tree links this Ralph Davis across the 1920, 1930 and 1940 US Censuses in Polk-County, Iowa (XGBoost, ~Confirmed), with identified parents Albert & Emma — first a head (b.~1914), then head of a 5-person household.
Age 26
b. ~1914
Male
Head
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Polk-County, Iowa |
| Surname | Davis |
| Given Name | Ralph |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Additional Details | |
| Occupation | Salesman |
| Industry | Const. Co. |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 1500 |
| Highest Grade | H-4 |
| 1935 Residence | Same Place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Salesman |
| Township / Ward | Des Moines City |
| Est. Birth Year | ~1914 |
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 Ralph | Age | Birth yr |
|---|---|---|---|---|
| Irene Lewis | Daughter | — | 17 | ~1923 |
| Ralph Davis | Head | — | 26 | ~1914 |
| Dorothy Lewis | Other | — | 36 | ~1904 |
| Mamie Hight | Other | — | 19 | ~1921 |
| Pauline Davis | Spouse | — | 26 | ~1914 |
Census Appearances
1920
Polk, Iowa
Son, age 5
Polk, Iowa · implied b. ~1915 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davis |
| Given Name | Ralph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Polk, Iowa
Son, age 16
Polk, Iowa · implied b. ~1914 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davis |
| Given Name | Ralph A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Iowa |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Polk-County, Iowa
Head, age 26
Polk-County, Iowa · implied b. ~1914 — 5 household members
| Surname | Davis |
| Given Name | Ralph |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Occupation | Salesman |
| Industry | Const. Co. |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 1500 |
| 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 Ralph Davis across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Albert Davis (~0.92 confidence) and mother Emma Davis (~0.92 confidence) and mother Emma Davis (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Albert Davis
b. ~1882
Source father
● Household
· direct · ~0.92
Mother
Emma Davis
b. ~1888
Source mother
● Household
· direct · ~0.92
Mother
Emma Davis
b. ~1889
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Ralph Davis
Head · 1940 · age 26 · b. ~1914 · 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-t0627-01194-00226)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Robert Grunold | 19 | Grand-son | Filler | Iowa |
| 42 | Ralph Davis THIS PERSON | 26 | Head | Salesman | Iowa |
| 43 | Pauline Davis | 26 | Wife | Saleslady | Iowa |
| 44 | Dorothy Lewis | 36 | Mother | Insurance-Clerk | Mississippi |
| 45 | Irene Lewis | 17 | Daughter | — | Iowa |
| 46 | Mamie Hight | 19 | Maid | Maid | South Dakota |
| 47 | Robert Stanley | 29 | Head | District-Manager | Washington |
| 48 | Agatha C. Stanley | 29 | Wife | — | Illinois |
| 49 | Mary Ann Stanley | 1 | Daughter | — | Illinois |
| 50 | Alfred Mcculloch | 75 | Head | — | Iowa |
| 51 | Ida Mcculloch | 66 | Wife | — | Germany |
| 52 | Mahala Mcculloch | 42 | Daughter | Teacher | Iowa |
| 53 | Maurice S. Carver | 30 | Head | Salesman | Iowa |
| 54 | Alice Carver | 28 | Wife | — | South Dak |
| 55 | Richard Carver | 2 | Son | — | Iowa |
| 56 | Harrison Whitmore | 27 | Head | City-Salesman | Iowa |
| 57 | Phyllis Whitmore | 25 | Wife | — | Iowa |
| 58 | Michael Whitmore | 3 | Son | — | Iowa |
| 59 | Marilyn Whitmore | 2 | Daughter | — | Iowa |
| 60 | Clarence Michaels | 30 | Lodger | Salesman | Wisconsin |
| 61 | Marjorie Mccoy | 46 | Head | Vice-President | Iowa |
| 62 | Ferne Hancock | 28 | Lodger | Stenographer | Iowa |
| 63 | Norma Ellsworth | 23 | Lodger | Stenographer | Iowa |
| 64 | Charles Schlosser | 32 | Head | Shipping-Clerk | Iowa |
| 65 | Arvalene Schlosser | 27 | Wife | — | Iowa |
| 66 | Christine Schlosser | 7 | Daughter | — | Iowa |
| 67 | Charlene Schlosser | 4 | Daughter | — | Iowa |
| 68 | Helen L. Garner | 52 | Head | Secretary | Illinois |
| 69 | Charles Werts | 63 | Lodger | Secretary | Iowa |
| 70 | John Garner | 21 | Foster-son | — | Florida |
| 71 | Walter E. Baker | 64 | Head | Doctor | Iowa |
| 72 | Louise Baker | 59 | Wife | — | Missouri |
| 73 | Ruth Baker | 29 | Daughter | — | Iowa |
| 74 | Philomene Rusch | 90 | Mother-in-law | — | Switzerland |
| 75 | Esther A. Nichols | 44 | Head | Office-Manager | Iowa |
| 76 | Jeanette Hall | 22 | Daughter | Secretary | Iowa |
| 77 | Marjorie Olsen | 27 | Sister | Stenographer | Iowa |
| 78 | Mary Mcarthur | 65 | Head | — | Iowa |
| 79 | Lloyd Ungles | 61 | Head | Owner-Manager Bakery-Co | Iowa |
| 80 | Iva Ungles | 59 | Wife | — | Missouri |
Pedigree Summary
Ralph
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)