Voter file loaded July 20, 2026 · figures are from that file, held as a fixed record
Gem County, Idaho has 12,237 active registered voters — 76.6% Republican, 5.7% Democratic, and 16.3% with no party affiliation, as of July 2026.
Party registration
Most reliable-voting precincts
| # | Precinct | Active voters | Supervoters | Supervoter % |
|---|---|---|---|---|
| 1 | 12-SW | 672 | 381 | 56.7% |
| 2 | 11-BN | 1,027 | 560 | 54.53% |
| 3 | 10-BK | 839 | 453 | 53.99% |
| 4 | 09-HN | 942 | 507 | 53.82% |
| 5 | 08-LT | 1,285 | 658 | 51.21% |
| 6 | 05-WE | 1,331 | 665 | 49.96% |
| 7 | 06-EM | 1,479 | 736 | 49.76% |
| 8 | 07-LN | 1,285 | 635 | 49.42% |
| 9 | 02-NE | 708 | 331 | 46.75% |
| 10 | 03-BV | 1,037 | 461 | 44.46% |
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 Gem County voted for president
Election results are public records.
Gem County at a glance.
Gem County had an estimated 21,857 residents in July 2024, the 19th most populous of Idaho's 44 counties, up 14.3% since the 2020 census. Of those, 17,133 are 18 or older, the voting-age population, and 23.5% are 65 or older. Its 12,237 active registered voters equal about 71.4% of that voting-age population.
It covers 560 square miles of land (39 people per square mile), and 59.7% of residents live outside any incorporated city or town. Its one incorporated place is Emmett (8,803 residents). The American Community Survey (2020-2024) puts it at a median age of 44.2, a median household income of $64,605, 20.7% of adults 25 and older holding a bachelor's degree or higher and 76.0% of occupied homes owned by the people living in them.
In 2024, 10,620 votes were cast for president, about 62.0% of the voting-age population; the Democratic ticket took 16.0% and the Republican ticket 82.0%. The two-party margin moved from R+43.0 in 2008 to R+66.0 in 2024.
- Population (2024 estimate)
- 21,857
- Population (2020 census base)
- 19,127
- Voting-age population (18+)
- 17,133
- Active voters per 100 adults
- 71.4
- Residents 65 and older
- 23.5%
- People per square mile
- 39
- Living outside incorporated places
- 59.7%
- Land area
- 560 sq mi
- Median age
- 44.2
- Median household income
- $64,605
- Adults 25+ with a bachelor's degree
- 20.7%
- Owner-occupied homes
- 76.0%
Presidential vote, 2008–2024
| Year | Democratic | Republican | Margin | Votes cast |
|---|---|---|---|---|
| 2024 | 16.0% | 82.0% | R+66.0 | 10,620 |
| 2020 | 18.1% | 79.8% | R+61.7 | 9,958 |
| 2016 | 15.5% | 75.2% | R+59.7 | 7,952 |
| 2012 | 26.1% | 70.9% | R+44.8 | 7,490 |
| 2008 | 27.3% | 70.3% | R+43.0 | 7,947 |
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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