Overview
- District ID
- id-sd-020
- State
- Idaho
- Chamber
- Upper chamber (state senate)
- District Code
- 020
- Land Area
- 17.8 sq mi
- Water Area
- 0.05 sq mi
Boundary
Boundary as GeoJSON
Source: U.S. Census Bureau TIGER/Line state legislative district boundaries.
Counties
| County | Overlap | Share of district land | Share of county land |
|---|
| Ada County | 17.83 sq mi | 100.0% | 1.7% |
Showing all 1 county
Places
Showing all 2 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 | 52,542 | 100.0% | 5.7% | 100.0% |
Source: U.S. Census Bureau 2020 blocks and 2025 block equivalency files (119th Congress, 2024 state legislative plans).
Voters
- Registered Voters
- 31,768
- Active Voters
- 31,768 (100.0%)
Party Registration
| Party | Voters | Share |
|---|
| Democratic | 3,876 | 12.2% |
| Republican | 19,306 | 60.8% |
| Unaffiliated | 8,182 | 25.8% |
| Other parties | 404 | 1.3% |
| No party recorded | 0 | 0.0% |
Turnout by Cycle
| Cycle | General | Democratic Primary | Republican Primary |
|---|
| 2025–2026 | 6,507 (20.5%) | 0 (0.0%) | 0 (0.0%) |
| 2023–2024 | 28,600 (90.0%) | 0 (0.0%) | 0 (0.0%) |
| 2021–2022 | 17,991 (56.6%) | 0 (0.0%) | 0 (0.0%) |
| 2019–2020 | 21,655 (68.2%) | 2,840 (8.9%) | 5,817 (18.3%) |
| 2017–2018 | 14,315 (45.1%) | 832 (2.6%) | 4,484 (14.1%) |
| 2015–2016 | 14,446 (45.5%) | 306 (1.0%) | 4,910 (15.5%) |
| 2013–2014 | 8,521 (26.8%) | 209 (0.7%) | 2,236 (7.0%) |
| 2011–2012 | 10,811 (34.0%) | 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
- 58,913 (± 2,498)
- Median Age
- 36.9
- Median Household Income
- $109,003 (± $6,680)
- High School Graduate or Higher (age 25+)
- 97.4%
- Bachelor's Degree or Higher (age 25+)
- 46.8%
Population by Age
| Group | People | Share |
|---|
| Under 18 | 16,213 | 27.5% |
| 18 to 64 | 34,795 | 59.1% |
| 65 and over | 7,905 | 13.4% |
Population by Race and Hispanic Origin
| Group | People | Share |
|---|
| Hispanic or Latino (any race) | 5,224 | 8.9% |
| White, not Hispanic | 47,617 | 80.8% |
| Black, not Hispanic | 643 | 1.1% |
| Asian, not Hispanic | 1,647 | 2.8% |
| American Indian / Alaska Native, not Hispanic | 145 | 0.2% |
| Native Hawaiian / Pacific Islander, not Hispanic | 45 | 0.1% |
| Some other race, not Hispanic | 592 | 1.0% |
| Two or more races, not Hispanic | 3,000 | 5.1% |
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
- 57,841
- Citizen Voting Age Population (CVAP)
- 41,742
Citizen Population by Race/Ethnicity
| Group | Citizens | Share |
|---|
| Non-Hispanic | 52,908 | 91.5% |
| Hispanic | 4,934 | 8.5% |
| White | 48,571 | 84.0% |
| Black | 531 | 0.9% |
| Asian | 1,390 | 2.4% |
| American Indian / Alaska Native | 137 | 0.2% |
| Native Hawaiian / Pacific Islander | 43 | 0.1% |
| Two or More Races | 154 | 0.3% |
Citizen Voting Age Population by Race/Ethnicity
| Group | CVAP | Share |
|---|
| Non-Hispanic | 38,219 | 91.6% |
| Hispanic | 3,522 | 8.4% |
| White | 35,779 | 85.7% |
| Black | 541 | 1.3% |
| Asian | 1,436 | 3.4% |
| American Indian / Alaska Native | 303 | 0.7% |
| Native Hawaiian / Pacific Islander | 47 | 0.1% |
| Two or More Races | 128 | 0.3% |
Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation (2020-2024 ACS 5-year).
