Overview
- District ID
- wa-sd-015
- State
- Washington
- Chamber
- Upper chamber (state senate)
- District Code
- 015
- Land Area
- 2,277.2 sq mi
- Water Area
- 13.5 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 19 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 |
|---|
| WA District 4 | 156,795 | 100.0% | 20.4% | 100.0% |
Source: U.S. Census Bureau 2020 blocks and 2025 block equivalency files (119th Congress, 2024 state legislative plans).
Voters
- Registered Voters
- 102,710
- Active Voters
- 97,108 (94.5%)
Party Registration
This state's voter file does not record party registration.
Turnout by Cycle
| Cycle | General | Democratic Primary | Republican Primary |
|---|
| 2025–2026 | 31,224 (30.4%) | 0 (0.0%) | 0 (0.0%) |
| 2023–2024 | 70,877 (69.0%) | 0 (0.0%) | 0 (0.0%) |
| 2021–2022 | 53,156 (51.8%) | 0 (0.0%) | 0 (0.0%) |
| 2019–2020 | 68,483 (66.7%) | 0 (0.0%) | 0 (0.0%) |
| 2017–2018 | 49,565 (48.3%) | 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 01/02/2026. These are registered voters, separate from the Census population figures. Counts under 10 are suppressed and shown as "<10".
Demographics
- Total Population
- 160,928 (± 2,761)
- Median Age
- 36.7
- Median Household Income
- $80,764 (± $3,427)
- High School Graduate or Higher (age 25+)
- 84.3%
- Bachelor's Degree or Higher (age 25+)
- 25.1%
Population by Age
| Group | People | Share |
|---|
| Under 18 | 41,642 | 25.9% |
| 18 to 64 | 91,795 | 57.0% |
| 65 and over | 27,491 | 17.1% |
Population by Race and Hispanic Origin
| Group | People | Share |
|---|
| Hispanic or Latino (any race) | 59,670 | 37.1% |
| White, not Hispanic | 89,861 | 55.8% |
| Black, not Hispanic | 1,303 | 0.8% |
| Asian, not Hispanic | 1,891 | 1.2% |
| American Indian / Alaska Native, not Hispanic | 915 | 0.6% |
| Native Hawaiian / Pacific Islander, not Hispanic | 131 | 0.1% |
| Some other race, not Hispanic | 720 | 0.4% |
| Two or more races, not Hispanic | 6,437 | 4.0% |
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
- 149,136
- Citizen Voting Age Population (CVAP)
- 108,073
Citizen Population by Race/Ethnicity
| Group | Citizens | Share |
|---|
| Non-Hispanic | 100,355 | 67.3% |
| Hispanic | 48,779 | 32.7% |
| White | 91,385 | 61.3% |
| Black | 1,225 | 0.8% |
| Asian | 1,631 | 1.1% |
| American Indian / Alaska Native | 914 | 0.6% |
| Native Hawaiian / Pacific Islander | 133 | 0.1% |
| Two or More Races | 258 | 0.2% |
Citizen Voting Age Population by Race/Ethnicity
| Group | CVAP | Share |
|---|
| Non-Hispanic | 80,577 | 74.6% |
| Hispanic | 27,494 | 25.4% |
| White | 74,469 | 68.9% |
| Black | 1,602 | 1.5% |
| Asian | 1,947 | 1.8% |
| American Indian / Alaska Native | 2,275 | 2.1% |
| Native Hawaiian / Pacific Islander | 99 | 0.1% |
| Two or More Races | 194 | 0.2% |
Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation (2020-2024 ACS 5-year).
