Washington Legislative (Senate) District 42

State Legislative District Profile (Upper Chamber)

Overview

District ID
wa-sd-042
State
Washington
Chamber
Upper chamber (state senate)
District Code
042
Land Area
2,010.4 sq mi
Water Area
361.4 sq mi

Boundary

Boundary of Washington Legislative (Senate) District 42

Boundary as GeoJSON

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

Counties

CountyOverlapShare of district landShare of county land
Whatcom County2010.40 sq mi100.0%95.4%

Showing all 1 county

Places

PlaceOverlapShare of district landShare of place land
Birch Bay CDP17.11 sq mi0.9%100.0%
Bellingham city13.71 sq mi0.7%48.6%
Ferndale city7.03 sq mi0.3%97.6%
Marietta-Alderwood CDP5.82 sq mi0.3%100.0%
Blaine city5.58 sq mi0.3%99.9%
Lynden city5.43 sq mi0.3%99.0%
Point Roberts CDP4.89 sq mi0.2%100.0%
Deming CDP2.75 sq mi0.1%100.0%
Kendall CDP2.75 sq mi0.1%100.0%
Peaceful Valley CDP2.51 sq mi0.1%100.0%
Custer CDP2.24 sq mi0.1%100.0%
Maple Falls CDP2.14 sq mi0.1%100.0%
Glacier CDP1.67 sq mi0.1%100.0%
Sumas city1.47 sq mi0.1%100.0%
Everson city1.35 sq mi0.1%90.2%
Nooksack city0.87 sq mi<0.1%94.6%

Showing all 16 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 2156,944100.0%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
125,138
Active Voters
117,028 (93.5%)

Party Registration

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

Turnout by Cycle

CycleGeneralDemocratic PrimaryRepublican Primary
2025–202650,779 (40.6%)0 (0.0%)0 (0.0%)
2023–202495,269 (76.1%)0 (0.0%)0 (0.0%)
2021–202275,534 (60.4%)0 (0.0%)0 (0.0%)
2019–202086,871 (69.4%)0 (0.0%)0 (0.0%)
2017–201864,972 (51.9%)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
160,832 (± 1,972)
Median Age
38.8
Median Household Income
$79,503 (± $2,724)
High School Graduate or Higher (age 25+)
92.8%
Bachelor's Degree or Higher (age 25+)
33.2%

Population by Age

GroupPeopleShare
Under 1833,46720.8%
18 to 6496,69360.1%
65 and over30,67219.1%

Population by Race and Hispanic Origin

GroupPeopleShare
Hispanic or Latino (any race)19,19311.9%
White, not Hispanic119,48674.3%
Black, not Hispanic1,4650.9%
Asian, not Hispanic7,1364.4%
American Indian / Alaska Native, not Hispanic3,2972.0%
Native Hawaiian / Pacific Islander, not Hispanic3820.2%
Some other race, not Hispanic7550.5%
Two or more races, not Hispanic9,1185.7%

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
153,051
Citizen Voting Age Population (CVAP)
119,915

Citizen Population by Race/Ethnicity

GroupCitizensShare
Non-Hispanic137,35689.7%
Hispanic15,69910.3%
White118,82777.6%
Black1,3520.9%
Asian6,0263.9%
American Indian / Alaska Native3,2472.1%
Native Hawaiian / Pacific Islander3680.2%
Two or More Races8240.5%

Citizen Voting Age Population by Race/Ethnicity

GroupCVAPShare
Non-Hispanic110,77592.4%
Hispanic9,1427.6%
White97,07281.0%
Black1,8431.5%
Asian6,3715.3%
American Indian / Alaska Native4,6493.9%
Native Hawaiian / Pacific Islander3190.3%
Two or More Races5410.5%

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