Washington Legislative (House) District 18

State Legislative District Profile (Lower Chamber)

Overview

District ID
wa-hd-018
State
Washington
Chamber
Lower chamber
District Code
018
Land Area
81.8 sq mi
Water Area
0.16 sq mi

Boundary

Boundary of Washington Legislative (House) District 18

Boundary as GeoJSON

Source: U.S. Census Bureau TIGER/Line state legislative district boundaries.

Counties

CountyOverlapShare of district landShare of county land
Clark County81.84 sq mi100.0%13.0%

Showing all 1 county

Places

PlaceOverlapShare of district landShare of place land
Battle Ground city8.54 sq mi10.4%98.4%
Brush Prairie CDP7.68 sq mi9.4%100.0%
Salmon Creek CDP6.35 sq mi7.8%100.0%
Duluth CDP5.97 sq mi7.3%100.0%
Five Corners CDP5.82 sq mi7.1%100.0%
Mount Vista CDP5.23 sq mi6.4%100.0%
Orchards CDP5.16 sq mi6.3%96.3%
Barberton CDP4.34 sq mi5.3%100.0%
Dollars Corner CDP3.96 sq mi4.8%100.0%
Meadow Glade CDP3.64 sq mi4.4%100.0%
Felida CDP2.91 sq mi3.6%100.0%
Hazel Dell CDP2.71 sq mi3.3%56.1%
Cherry Grove CDP2.33 sq mi2.8%100.0%
Venersborg CDP2.30 sq mi2.8%21.5%
Lake Shore CDP1.63 sq mi2.0%100.0%
Lewisville CDP0.57 sq mi0.7%10.4%
Hockinson CDP0.13 sq mi0.2%1.0%

Showing all 17 places

Overlapping Congressional Districts

Congressional districtPopulation in bothShare of this district's populationShare of the congressional district's populationShare of this district's land
WA District 3157,021100.0%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
120,937
Active Voters
112,176 (92.8%)

Party Registration

This state's voter file does not record party registration.

Turnout by Cycle

CycleGeneralDemocratic PrimaryRepublican Primary
2025–202636,943 (30.5%)0 (0.0%)0 (0.0%)
2023–202487,977 (72.7%)0 (0.0%)0 (0.0%)
2021–202264,699 (53.5%)0 (0.0%)0 (0.0%)
2019–202077,010 (63.7%)0 (0.0%)0 (0.0%)
2017–201851,985 (43.0%)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
161,259 (± 2,946)
Median Age
39.4
Median Household Income
$106,750 (± $3,450)
High School Graduate or Higher (age 25+)
93.2%
Bachelor's Degree or Higher (age 25+)
32.6%

Population by Age

GroupPeopleShare
Under 1836,90722.9%
18 to 6497,84460.7%
65 and over26,50816.4%

Population by Race and Hispanic Origin

GroupPeopleShare
Hispanic or Latino (any race)18,07411.2%
White, not Hispanic121,19675.2%
Black, not Hispanic2,5451.6%
Asian, not Hispanic6,9964.3%
American Indian / Alaska Native, not Hispanic2830.2%
Native Hawaiian / Pacific Islander, not Hispanic5390.3%
Some other race, not Hispanic1,3620.8%
Two or more races, not Hispanic10,2646.4%

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
154,504
Citizen Voting Age Population (CVAP)
118,052

Citizen Population by Race/Ethnicity

GroupCitizensShare
Non-Hispanic139,15590.1%
Hispanic15,3549.9%
White121,46378.6%
Black2,3221.5%
Asian6,2274.0%
American Indian / Alaska Native2770.2%
Native Hawaiian / Pacific Islander4080.3%
Two or More Races1,6581.1%

Citizen Voting Age Population by Race/Ethnicity

GroupCVAPShare
Non-Hispanic109,28292.6%
Hispanic8,7667.4%
White97,11182.3%
Black2,7362.3%
Asian6,5395.5%
American Indian / Alaska Native1,8421.6%
Native Hawaiian / Pacific Islander3090.3%
Two or More Races8440.7%

Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation (2020-2024 ACS 5-year).