Voter file loaded July 20, 2026 · figures are from that file, held as a fixed record
Owyhee County, Idaho has 5,643 active registered voters — 76.3% Republican, 6.6% Democratic, and 15.7% with no party affiliation, as of July 2026.
Party registration
Most reliable-voting precincts
| # | Precinct | Active voters | Supervoters | Supervoter % |
|---|---|---|---|---|
| 1 | 009 | 476 | 231 | 48.53% |
| 2 | 006 | 561 | 270 | 48.13% |
| 3 | 004 | 833 | 381 | 45.74% |
| 4 | 003 | 839 | 369 | 43.98% |
| 5 | 002 | 1,202 | 518 | 43.09% |
| 6 | 001 | 866 | 347 | 40.07% |
Supervoters are active registered voters who cast a ballot in at least 3 of the last 4 November general elections (2018–2024). Percentages are precinct totals from the official state voter file — no individual voter information is shown. Precincts with fewer than 400 active voters are excluded.
How Owyhee County voted for president
Election results are public records.
Owyhee County at a glance.
Owyhee County had an estimated 12,748 residents in July 2024, the 28th most populous of Idaho's 44 counties, up 7.0% since the 2020 census. Of those, 9,813 are 18 or older, the voting-age population, and 19.9% are 65 or older. Its 5,643 active registered voters equal about 57.5% of that voting-age population.
It covers 7,668 square miles of land (1.7 people per square mile), and 61.9% of residents live outside any incorporated city or town. The largest cities and towns are Homedale (3,147), Marsing (1,245) and Grand View (464). The American Community Survey (2020-2024) puts it at a median age of 39.0, a median household income of $64,406, 12.4% of adults 25 and older holding a bachelor's degree or higher and 72.6% of occupied homes owned by the people living in them.
In 2024, 4,950 votes were cast for president, about 50.4% of the voting-age population; the Democratic ticket took 15.3% and the Republican ticket 82.8%. The two-party margin moved from R+51.2 in 2008 to R+67.5 in 2024.
- Population (2024 estimate)
- 12,748
- Population (2020 census base)
- 11,918
- Voting-age population (18+)
- 9,813
- Active voters per 100 adults
- 57.5
- Residents 65 and older
- 19.9%
- People per square mile
- 1.7
- Living outside incorporated places
- 61.9%
- Land area
- 7,668 sq mi
- Median age
- 39.0
- Median household income
- $64,406
- Adults 25+ with a bachelor's degree
- 12.4%
- Owner-occupied homes
- 72.6%
Largest cities and towns
- Homedale 3,147
- Marsing 1,245
- Grand View 464
Presidential vote, 2008–2024
| Year | Democratic | Republican | Margin | Votes cast |
|---|---|---|---|---|
| 2024 | 15.3% | 82.8% | R+67.5 | 4,950 |
| 2020 | 17.2% | 80.5% | R+63.3 | 4,742 |
| 2016 | 15.1% | 77.9% | R+62.8 | 3,920 |
| 2012 | 22.4% | 75.0% | R+52.6 | 3,723 |
| 2008 | 23.3% | 74.5% | R+51.2 | 4,058 |
Sources: U.S. Census Bureau Vintage 2024 population estimates and 2024 Gazetteer; American Community Survey 2020–2024 5-year estimates; certified county presidential returns. Growth, density and turnout are simple arithmetic on those figures.
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