Overview
- District ID
- wa-hd-031
- State
- Washington
- Chamber
- Lower chamber
- District Code
- 031
- Land Area
- 559.6 sq mi
- Water Area
- 4.81 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 |
|---|
| Pierce County | 524.59 sq mi | 93.7% | 31.5% |
| King County | 34.99 sq mi | 6.3% | 1.7% |
Showing all 2 counties
Places
Showing all 23 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 8 | 115,072 | 73.3% | 14.9% | 96.1% |
| WA District 10 | 33,283 | 21.2% | 4.3% | 3.4% |
| WA District 6 | 7,067 | 4.5% | 0.9% | 0.4% |
| WA District 9 | 1,640 | 1.0% | 0.2% | 0.1% |
Source: U.S. Census Bureau 2020 blocks and 2025 block equivalency files (119th Congress, 2024 state legislative plans).
Voters
- Registered Voters
- 118,796
- Active Voters
- 111,603 (93.9%)
Party Registration
This state's voter file does not record party registration.
Turnout by Cycle
| Cycle | General | Democratic Primary | Republican Primary |
|---|
| 2025–2026 | 35,930 (30.2%) | 0 (0.0%) | 0 (0.0%) |
| 2023–2024 | 86,925 (73.2%) | 0 (0.0%) | 0 (0.0%) |
| 2021–2022 | 65,266 (54.9%) | 0 (0.0%) | 0 (0.0%) |
| 2019–2020 | 81,531 (68.6%) | 0 (0.0%) | 0 (0.0%) |
| 2017–2018 | 55,777 (47.0%) | 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 01/02/2026. These are registered voters, separate from the Census population figures. Counts under 10 are suppressed and shown as "<10".
Demographics
- Total Population
- 160,958 (± 2,529)
- Median Age
- 38.3
- Median Household Income
- $122,456 (± $2,285)
- High School Graduate or Higher (age 25+)
- 93.7%
- Bachelor's Degree or Higher (age 25+)
- 30.2%
Population by Age
| Group | People | Share |
|---|
| Under 18 | 40,814 | 25.4% |
| 18 to 64 | 98,171 | 61.0% |
| 65 and over | 21,973 | 13.7% |
Population by Race and Hispanic Origin
| Group | People | Share |
|---|
| Hispanic or Latino (any race) | 16,836 | 10.5% |
| White, not Hispanic | 116,928 | 72.6% |
| Black, not Hispanic | 3,730 | 2.3% |
| Asian, not Hispanic | 8,497 | 5.3% |
| American Indian / Alaska Native, not Hispanic | 2,106 | 1.3% |
| Native Hawaiian / Pacific Islander, not Hispanic | 1,357 | 0.8% |
| Some other race, not Hispanic | 1,066 | 0.7% |
| Two or more races, not Hispanic | 10,438 | 6.5% |
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
- 154,501
- Citizen Voting Age Population (CVAP)
- 114,316
Citizen Population by Race/Ethnicity
| Group | Citizens | Share |
|---|
| Non-Hispanic | 140,233 | 90.8% |
| Hispanic | 14,264 | 9.2% |
| White | 116,892 | 75.7% |
| Black | 3,425 | 2.2% |
| Asian | 7,232 | 4.7% |
| American Indian / Alaska Native | 2,086 | 1.4% |
| Native Hawaiian / Pacific Islander | 1,285 | 0.8% |
| Two or More Races | 1,682 | 1.1% |
Citizen Voting Age Population by Race/Ethnicity
| Group | CVAP | Share |
|---|
| Non-Hispanic | 106,474 | 93.1% |
| Hispanic | 7,839 | 6.9% |
| White | 91,024 | 79.6% |
| Black | 3,417 | 3.0% |
| Asian | 7,143 | 6.2% |
| American Indian / Alaska Native | 3,165 | 2.8% |
| Native Hawaiian / Pacific Islander | 885 | 0.8% |
| Two or More Races | 915 | 0.8% |
Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation (2020-2024 ACS 5-year).
