Voter file loaded July 20, 2026 · figures are from that file, held as a fixed record
Valley County, Idaho has 8,421 active registered voters — 64.4% Republican, 13.1% Democratic, and 21.2% with no party affiliation, as of July 2026.
Party registration
Most reliable-voting precincts
| # | Precinct | Active voters | Supervoters | Supervoter % |
|---|---|---|---|---|
| 1 | 001 | 510 | 321 | 62.94% |
| 2 | 007 | 774 | 429 | 55.43% |
| 3 | 005 | 1,306 | 723 | 55.36% |
| 4 | 004 | 2,330 | 1,217 | 52.23% |
| 5 | 006 | 2,671 | 1,358 | 50.84% |
| 6 | 002 | 684 | 340 | 49.71% |
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 Valley County voted for president
Election results are public records.
Valley County at a glance.
Valley County had an estimated 12,777 residents in July 2024, the 27th most populous of Idaho's 44 counties, up 8.8% since the 2020 census. Of those, 10,520 are 18 or older, the voting-age population, and 28.3% are 65 or older. Its 8,421 active registered voters equal about 80.0% of that voting-age population.
It covers 3,665 square miles of land (3.5 people per square mile), and 57.9% of residents live outside any incorporated city or town. The largest cities and towns are McCall (4,104), Cascade (1,026) and Donnelly (255). The American Community Survey (2020-2024) puts it at a median age of 46.9, a median household income of $76,078, 40.1% of adults 25 and older holding a bachelor's degree or higher and 81.9% of occupied homes owned by the people living in them.
In 2024, 7,240 votes were cast for president, about 68.8% of the voting-age population; the Democratic ticket took 39.6% and the Republican ticket 58.2%. The two-party margin moved from R+6.9 in 2008 to R+18.6 in 2024.
- Population (2024 estimate)
- 12,777
- Population (2020 census base)
- 11,742
- Voting-age population (18+)
- 10,520
- Active voters per 100 adults
- 80.0
- Residents 65 and older
- 28.3%
- People per square mile
- 3.5
- Living outside incorporated places
- 57.9%
- Land area
- 3,665 sq mi
- Median age
- 46.9
- Median household income
- $76,078
- Adults 25+ with a bachelor's degree
- 40.1%
- Owner-occupied homes
- 81.9%
Largest cities and towns
- McCall 4,104
- Cascade 1,026
- Donnelly 255
Presidential vote, 2008–2024
| Year | Democratic | Republican | Margin | Votes cast |
|---|---|---|---|---|
| 2024 | 39.6% | 58.2% | R+18.6 | 7,240 |
| 2020 | 42.1% | 55.9% | R+13.8 | 7,063 |
| 2016 | 35.8% | 54.3% | R+18.5 | 5,349 |
| 2012 | 42.6% | 54.2% | R+11.6 | 4,919 |
| 2008 | 45.4% | 52.3% | R+6.9 | 5,296 |
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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