RD
Roy Davis — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Polk, Iowa
Our Model Tree links this Roy Davis across the 1900, 1910, 1920 and 1930 US Censuses in Polk, Iowa (XGBoost, ~Confirmed) — first a head (b.~1898), then head of a 5-person household.
Age 32
b. ~1898
Male
Head
Born: Iowa
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Polk, Iowa |
| Surname | Davis |
| Given Name | Roy |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Iowa |
| Age at First Marriage | 20 |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Additional Details | |
| Occupation | Farmer |
| Industry | General Farm |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Veteran | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Farmer |
| Township / Ward | Fourmile Township |
| Est. Birth Year | ~1898 |
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 1930 census.
| Name | Relation to head | Relative to Roy | Age | Birth yr |
|---|---|---|---|---|
| Vada Davis | Daughter | — | 1 | ~1929 |
| Roy Davis | Head | — | 32 | ~1898 |
| Alice Davis | Other | — | 33 | ~1897 |
| Arneil Davis | Son | — | 3 | ~1927 |
| William Davis | Son | — | 5 | ~1925 |
Census Appearances
1900
Polk, Iowa
Other, age 3
Polk, Iowa · implied b. ~1897 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davis |
| Given Name | Roy |
| Relationship to Head | Step Son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Iowa |
| Birth Month | May |
| Birth Year | 1897 |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1910
Polk, Iowa
Other, age 12
Polk, Iowa · implied b. ~1898 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davis |
| Given Name | Roy |
| Relationship to Head | Boarder |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | Farm Laborer |
| Industry | General Farm |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1920
Polk, Iowa
Head, age 22
Polk, Iowa · implied b. ~1898 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davis |
| Given Name | Roy |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Married |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | Farm Labor |
| Industry | Working out |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Polk, Iowa
Head, age 32
Polk, Iowa · implied b. ~1898 — 5 household members
| Surname | Davis |
| Given Name | Roy |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Iowa |
| Age at First Marriage | 20 |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | Farmer |
| Industry | General Farm |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Veteran | Yes |
| 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 Roy Davis across 4 US Census years (1900, 1910, 1920 and 1930) in Polk, Iowa, using XGBoost record linkage.
Show:
This person
Anchor record
Roy Davis
Head · 1930 · age 32 · b. ~1898 · Iowa
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Polk, Iowa
Open full size
1930 US Federal Census — Polk, Iowa
Page Contents
50 people indexed on this census page (ia:1930:iowacensus00reel678:0174)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Edgar P | 19 | Son | None | Iowa |
| 52 | Carl H | 17 | Son | Laborer | Wisconsin |
| 53 | Eunice S | 16 | Daughter | None | Iowa |
| 54 | John W Wheeler | 73 | Head | Farmer | Iowa |
| 55 | Anna Wheeler | 70 | Wife-H | None | Iowa |
| 56 | John Jr Wheeler | 31 | Son | Laborer | Iowa |
| 57 | George L Miller | 30 | Head | Farmer | Missouri |
| 58 | Grace V Miller | 23 | Wife-H | None | Iowa |
| 59 | Kenneth G Miller | 2 | Son | None | Iowa |
| 60 | Blake F Miller | 1 | Son | None | Iowa |
| 61 | Lee Johnson | 25 | Head | Grocery | Iowa |
| 62 | Hiram L Jackson | 64 | Head | Foreman | Indiana |
| 63 | Addie E Jackson | 64 | Wife-H | None | Iowa |
| 64 | Albert Miller | 52 | Head | Farmer | Iowa |
| 65 | Laura C Miller | 42 | Wife-H | None | Kansas |
| 66 | Martin Miller | 25 | Son | Laborer | Iowa |
| 67 | Lee H Miller | 12 | Son | None | Iowa |
| 68 | Stanley Miller | 9 | Son | None | Iowa |
| 69 | Arthur Miller | 7 | Son | None | Iowa |
| 70 | Lottie Miller | 74 | Head | None | Iowa |
| 71 | Jordan Johnson | 68 | Brother | None | Iowa |
| 72 | James Miller | 47 | Head | Farmer | Iowa |
| 73 | Rebecca E Miller | 46 | Wife-H | None | Iowa |
| 74 | Lyle Miller | 11 | Son | None | Iowa |
| 75 | Iris M Miller | 6 | Daughter | None | Iowa |
| 76 | Betty L Miller | 5 | Daughter | None | Iowa |
| 77 | Amos K Miller | 68 | Head | Farmer | Iowa |
| 78 | Alice J Miller | 65 | Wife-H | None | Wisconsin |
| 79 | Amos Jr Miller | 23 | Son | Labourer | Iowa |
| 80 | Alice J Miller | 22 | Daughter | None | Iowa |
| 81 | Ora M Miller | 20 | Son | None | Iowa |
| 82 | Harry F Miller | 25 | Head | Farmer | Iowa |
| 83 | Francis E Miller | 18 | Wife-H | None | Iowa |
| 84 | Edwin W Freel | 59 | Head | Farmer | Iowa |
| 85 | Perditta D Freel | 69 | Wife-H | None | Iowa |
| 86 | Roy Davis THIS PERSON | 32 | Head | Farmer | Iowa |
| 87 | Alice L Davis | 33 | Wife-H | None | Iowa |
| 88 | William L Davis | 5 | Son | None | Iowa |
| 89 | Arneil L Davis | 3 | Son | None | Iowa |
| 90 | Vada M Davis | 1 | Daughter | None | Iowa |
| 91 | Paul F Yermic | 39 | Head | Farmer | Iowa |
| 92 | Anna M Yermic | 33 | Wife-H | None | Iowa |
| 93 | Warren F Yermic | 14 | Son | None | Iowa |
| 94 | Layton P Yermic | 11 | Son | None | Iowa |
| 95 | Darlene B Yermic | 5 | Daughter | None | Iowa |
| 96 | James Davis | 47 | Servant | Laborer | Iowa |
| 97 | Elizabeth Miller | 17 | Servant | Laborer | Iowa |
| 98 | Charles Yermic | 76 | Head | Farmer | Sweden |
| 99 | Julia Yermic | 73 | Wife-H | None | Sweden |
| 100 | James B Stewart | 75 | Head | Farmer | Kentucky |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)