Overview
- District ID
- id-sd-001
- State
- Idaho
- Chamber
- Upper chamber (state senate)
- District Code
- 001
- Land Area
- 2,837.2 sq mi
- Water Area
- 179.5 sq mi
Boundary
Boundary as GeoJSON
Source: U.S. Census Bureau TIGER/Line state legislative district boundaries.
Counties
Showing all 2 counties
Places
Showing all 13 places
Overlapping Congressional Districts
| Congressional district | Population in both | Share of this district's population | Share of the congressional district's population | Share of this district's land |
|---|
| ID District 1 | 53,610 | 100.0% | 5.8% | 100.0% |
Source: U.S. Census Bureau 2020 blocks and 2025 block equivalency files (119th Congress, 2024 state legislative plans).
Voters
- Registered Voters
- 37,540
- Active Voters
- 37,540 (100.0%)
Party Registration
| Party | Voters | Share |
|---|
| Democratic | 2,901 | 7.7% |
| Republican | 27,248 | 72.6% |
| Unaffiliated | 6,764 | 18.0% |
| Other parties | 627 | 1.7% |
| No party recorded | 0 | 0.0% |
Turnout by Cycle
| Cycle | General | Democratic Primary | Republican Primary |
|---|
| 2025–2026 | 5,072 (13.5%) | 0 (0.0%) | 0 (0.0%) |
| 2023–2024 | 32,801 (87.4%) | 0 (0.0%) | 0 (0.0%) |
| 2021–2022 | 23,011 (61.3%) | 0 (0.0%) | 0 (0.0%) |
| 2019–2020 | 26,103 (69.5%) | 2,314 (6.2%) | 8,700 (23.2%) |
| 2017–2018 | 17,357 (46.2%) | 917 (2.4%) | 8,033 (21.4%) |
| 2015–2016 | 17,922 (47.7%) | 474 (1.3%) | 8,018 (21.4%) |
| 2013–2014 | 10,452 (27.8%) | 290 (0.8%) | 4,423 (11.8%) |
| 2011–2012 | 12,981 (34.6%) | 0 (0.0%) | 0 (0.0%) |
Turnout counts today's registered voters with a counted ballot in the cycle's elections (the odd and even year), as a share of today's registered voters. Voters who have since left the rolls are not counted.
Browse the voter list for this district (premium access; sign-in required)
Source: Civitech voter file snapshot as of 01/12/2026. These are registered voters, separate from the Census population figures. Counts under 10 are suppressed and shown as "<10".
Demographics
- Total Population
- 57,689 (± 866)
- Median Age
- 47.7
- Median Household Income
- $68,429 (± $4,140)
- High School Graduate or Higher (age 25+)
- 91.4%
- Bachelor's Degree or Higher (age 25+)
- 28.0%
Population by Age
| Group | People | Share |
|---|
| Under 18 | 11,369 | 19.7% |
| 18 to 64 | 31,215 | 54.1% |
| 65 and over | 15,105 | 26.2% |
Population by Race and Hispanic Origin
| Group | People | Share |
|---|
| Hispanic or Latino (any race) | 2,541 | 4.4% |
| White, not Hispanic | 50,289 | 87.2% |
| Black, not Hispanic | 220 | 0.4% |
| Asian, not Hispanic | 549 | 1.0% |
| American Indian / Alaska Native, not Hispanic | 312 | 0.5% |
| Native Hawaiian / Pacific Islander, not Hispanic | 27 | 0.0% |
| Some other race, not Hispanic | 589 | 1.0% |
| Two or more races, not Hispanic | 3,162 | 5.5% |
Source: U.S. Census Bureau, American Community Survey 2020-2024 ACS 5-year estimates (tables B01001, B01002, B01003, B03002, B15003, B19013) for this state legislative district. Estimates are survey-based; ± figures are 90% margins of error.
Citizen Voting Age Population
- Total Citizen Population
- 56,675
- Citizen Voting Age Population (CVAP)
- 45,385
Citizen Population by Race/Ethnicity
| Group | Citizens | Share |
|---|
| Non-Hispanic | 54,605 | 96.3% |
| Hispanic | 2,067 | 3.6% |
| White | 52,084 | 91.9% |
| Black | 180 | 0.3% |
| Asian | 317 | 0.6% |
| American Indian / Alaska Native | 311 | 0.5% |
| Native Hawaiian / Pacific Islander | 29 | 0.1% |
| Two or More Races | 122 | 0.2% |
Citizen Voting Age Population by Race/Ethnicity
| Group | CVAP | Share |
|---|
| Non-Hispanic | 44,087 | 97.1% |
| Hispanic | 1,298 | 2.9% |
| White | 42,372 | 93.4% |
| Black | 172 | 0.4% |
| Asian | 510 | 1.1% |
| American Indian / Alaska Native | 882 | 1.9% |
| Native Hawaiian / Pacific Islander | 22 | 0.0% |
| Two or More Races | 123 | 0.3% |
Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation (2020-2024 ACS 5-year).
