Voter file loaded July 20, 2026 · figures are from that file, held as a fixed record
Lemhi County, Idaho has 5,436 active registered voters — 78.2% Republican, 6.6% Democratic, and 14.4% with no party affiliation, as of July 2026.
Party registration
Most reliable-voting precincts
| # | Precinct | Active voters | Supervoters | Supervoter % |
|---|---|---|---|---|
| 1 | 002 | 1,141 | 637 | 55.83% |
| 2 | 003 | 1,724 | 914 | 53.02% |
| 3 | 001 | 1,325 | 669 | 50.49% |
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 Lemhi County voted for president
Election results are public records.
Lemhi County at a glance.
Lemhi County had an estimated 8,397 residents in July 2024, the 33rd most populous of Idaho's 44 counties, up 5.3% since the 2020 census. Of those, 6,906 are 18 or older, the voting-age population, and 32.4% are 65 or older. Its 5,436 active registered voters equal about 78.7% of that voting-age population.
It covers 4,564 square miles of land (1.8 people per square mile), and 60.0% of residents live outside any incorporated city or town. The largest cities and towns are Salmon (3,257) and Leadore (100). The American Community Survey (2020-2024) puts it at a median age of 53.3, a median household income of $53,202, 24.1% of adults 25 and older holding a bachelor's degree or higher and 79.3% of occupied homes owned by the people living in them.
In 2024, 4,873 votes were cast for president, about 70.6% of the voting-age population; the Democratic ticket took 21.3% and the Republican ticket 76.3%. The two-party margin moved from R+45.8 in 2008 to R+55.0 in 2024.
- Population (2024 estimate)
- 8,397
- Population (2020 census base)
- 7,975
- Voting-age population (18+)
- 6,906
- Active voters per 100 adults
- 78.7
- Residents 65 and older
- 32.4%
- People per square mile
- 1.8
- Living outside incorporated places
- 60.0%
- Land area
- 4,564 sq mi
- Median age
- 53.3
- Median household income
- $53,202
- Adults 25+ with a bachelor's degree
- 24.1%
- Owner-occupied homes
- 79.3%
Largest cities and towns
- Salmon 3,257
- Leadore 100
Presidential vote, 2008–2024
| Year | Democratic | Republican | Margin | Votes cast |
|---|---|---|---|---|
| 2024 | 21.3% | 76.3% | R+55.0 | 4,873 |
| 2020 | 21.8% | 75.8% | R+54.0 | 4,738 |
| 2016 | 18.0% | 74.0% | R+56.0 | 4,068 |
| 2012 | 23.4% | 73.7% | R+50.3 | 4,109 |
| 2008 | 25.8% | 71.6% | R+45.8 | 4,105 |
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.
Running in Lemhi County?
The voter file is loaded. Create your campaign and start canvassing in minutes.
Start free in Lemhi CountyAlso see: Motion51 in Idaho · How to run for office in Lemhi County · Pricing