Voter file loaded July 20, 2026 · figures are from that file, held as a fixed record
Power County, Idaho has 3,556 active registered voters — 66.4% Republican, 10.8% Democratic, and 21.7% with no party affiliation, as of July 2026.
Party registration
Most reliable-voting precincts
| # | Precinct | Active voters | Supervoters | Supervoter % |
|---|---|---|---|---|
| 1 | 006 | 410 | 194 | 47.32% |
| 2 | 001 | 703 | 326 | 46.37% |
| 3 | 002 | 868 | 400 | 46.08% |
| 4 | 003 | 1,094 | 491 | 44.88% |
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 Power County voted for president
Election results are public records.
Power County at a glance.
Power County had an estimated 8,381 residents in July 2024, the 34th most populous of Idaho's 44 counties, up 6.4% since the 2020 census. Of those, 6,008 are 18 or older, the voting-age population, and 17.0% are 65 or older. Its 3,556 active registered voters equal about 59.2% of that voting-age population.
It covers 1,404 square miles of land (6.0 people per square mile), and 38.8% of residents live outside any incorporated city or town. The largest cities and towns are American Falls (4,863), Rockland (263) and Pocatello (part) (0). The American Community Survey (2020-2024) puts it at a median age of 34.6, a median household income of $61,146, 15.3% of adults 25 and older holding a bachelor's degree or higher and 73.7% of occupied homes owned by the people living in them.
In 2024, 3,019 votes were cast for president, about 50.2% of the voting-age population; the Democratic ticket took 26.0% and the Republican ticket 71.1%. The two-party margin moved from R+25.6 in 2008 to R+45.1 in 2024.
- Population (2024 estimate)
- 8,381
- Population (2020 census base)
- 7,879
- Voting-age population (18+)
- 6,008
- Active voters per 100 adults
- 59.2
- Residents 65 and older
- 17.0%
- People per square mile
- 6.0
- Living outside incorporated places
- 38.8%
- Land area
- 1,404 sq mi
- Median age
- 34.6
- Median household income
- $61,146
- Adults 25+ with a bachelor's degree
- 15.3%
- Owner-occupied homes
- 73.7%
Largest cities and towns
- American Falls 4,863
- Rockland 263
- Pocatello (part) 0
Presidential vote, 2008–2024
| Year | Democratic | Republican | Margin | Votes cast |
|---|---|---|---|---|
| 2024 | 26.0% | 71.1% | R+45.1 | 3,019 |
| 2020 | 28.0% | 68.6% | R+40.6 | 3,086 |
| 2016 | 25.3% | 60.4% | R+35.1 | 2,758 |
| 2012 | 33.8% | 64.4% | R+30.6 | 2,903 |
| 2008 | 36.1% | 61.7% | R+25.6 | 2,842 |
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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