Voter file loaded July 20, 2026 · figures are from that file, held as a fixed record
Butte County, Idaho has 1,609 active registered voters — 79.3% Republican, 4.3% Democratic, and 16.0% with no party affiliation, as of July 2026.
Party registration
Most reliable-voting precincts
| # | Precinct | Active voters | Supervoters | Supervoter % |
|---|---|---|---|---|
| 1 | 003 | 549 | 315 | 57.38% |
| 2 | 001 | 535 | 259 | 48.41% |
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 Butte County voted for president
Election results are public records.
Butte County at a glance.
Butte County had an estimated 2,735 residents in July 2024, the 42nd most populous of Idaho's 44 counties, up 6.2% since the 2020 census. Of those, 2,106 are 18 or older, the voting-age population, and 26.9% are 65 or older. Its 1,609 active registered voters equal about 76.4% of that voting-age population.
It covers 2,236 square miles of land (1.2 people per square mile), and 57.1% of residents live outside any incorporated city or town. The largest cities and towns are Arco (911), Moore (175) and Butte City (86). The American Community Survey (2020-2024) puts it at a median age of 41.3, a median household income of $53,015, 17.5% of adults 25 and older holding a bachelor's degree or higher and 77.5% of occupied homes owned by the people living in them.
In 2024, 1,494 votes were cast for president, about 70.9% of the voting-age population; the Democratic ticket took 12.4% and the Republican ticket 84.9%. The two-party margin moved from R+52.3 in 2008 to R+72.5 in 2024.
- Population (2024 estimate)
- 2,735
- Population (2020 census base)
- 2,575
- Voting-age population (18+)
- 2,106
- Active voters per 100 adults
- 76.4
- Residents 65 and older
- 26.9%
- People per square mile
- 1.2
- Living outside incorporated places
- 57.1%
- Land area
- 2,236 sq mi
- Median age
- 41.3
- Median household income
- $53,015
- Adults 25+ with a bachelor's degree
- 17.5%
- Owner-occupied homes
- 77.5%
Largest cities and towns
- Arco 911
- Moore 175
- Butte City 86
Presidential vote, 2008–2024
| Year | Democratic | Republican | Margin | Votes cast |
|---|---|---|---|---|
| 2024 | 12.4% | 84.9% | R+72.5 | 1,494 |
| 2020 | 13.3% | 84.9% | R+71.6 | 1,415 |
| 2016 | 13.0% | 74.3% | R+61.3 | 1,230 |
| 2012 | 20.1% | 77.8% | R+57.7 | 1,286 |
| 2008 | 22.6% | 74.9% | R+52.3 | 1,410 |
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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