Voter file loaded July 20, 2026 · figures are from that file, held as a fixed record
Lewis County, Idaho has 2,222 active registered voters — 75.5% Republican, 5.7% Democratic, and 17.3% with no party affiliation, as of July 2026.
Party registration
Most reliable-voting precincts
| # | Precinct | Active voters | Supervoters | Supervoter % |
|---|---|---|---|---|
| 1 | 001 | 448 | 226 | 50.45% |
| 2 | 002 | 624 | 202 | 32.37% |
| 3 | 004 | 459 | 122 | 26.58% |
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 Lewis County voted for president
Election results are public records.
Lewis County at a glance.
Lewis County had an estimated 3,728 residents in July 2024, the 41st most populous of Idaho's 44 counties, up 5.8% since the 2020 census. Of those, 2,970 are 18 or older, the voting-age population, and 30.2% are 65 or older. Its 2,222 active registered voters equal about 74.8% of that voting-age population.
It covers 479 square miles of land (7.8 people per square mile), and 32.4% of residents live outside any incorporated city or town. The largest cities and towns are Kamiah (part) (1,155), Craigmont (477), Nezperce (475), Winchester (366) and Reubens (48). The American Community Survey (2020-2024) puts it at a median age of 49.0, a median household income of $51,615, 21.3% of adults 25 and older holding a bachelor's degree or higher and 76.4% of occupied homes owned by the people living in them.
In 2024, 1,843 votes were cast for president, about 62.1% of the voting-age population; the Democratic ticket took 16.5% and the Republican ticket 81.6%. The two-party margin moved from R+44.1 in 2008 to R+65.1 in 2024.
- Population (2024 estimate)
- 3,728
- Population (2020 census base)
- 3,523
- Voting-age population (18+)
- 2,970
- Active voters per 100 adults
- 74.8
- Residents 65 and older
- 30.2%
- People per square mile
- 7.8
- Living outside incorporated places
- 32.4%
- Land area
- 479 sq mi
- Median age
- 49.0
- Median household income
- $51,615
- Adults 25+ with a bachelor's degree
- 21.3%
- Owner-occupied homes
- 76.4%
Largest cities and towns
- Kamiah (part) 1,155
- Craigmont 477
- Nezperce 475
- Winchester 366
- Reubens 48
Presidential vote, 2008–2024
| Year | Democratic | Republican | Margin | Votes cast |
|---|---|---|---|---|
| 2024 | 16.5% | 81.6% | R+65.1 | 1,843 |
| 2020 | 18.7% | 79.6% | R+60.9 | 1,870 |
| 2016 | 17.0% | 75.6% | R+58.6 | 1,590 |
| 2012 | 24.6% | 72.8% | R+48.2 | 1,612 |
| 2008 | 26.6% | 70.7% | R+44.1 | 1,804 |
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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