2018 United States Senate election in Washington

Candidates The primary election featured 30 candidates. Democratic Party Declared • Maria Cantwell, incumbent senator • George H. Kalberer • Don L. Rivers • Mohammad Said • Clint Tannehill Republican Party Declared • Dave Bryant • Art Coday • Rocky De La Fuente, businessman and former presidential candidate • Joey Gibson, activist and founder of Patriot Prayer • Goodspaceguy, perennial candidate • Matt Hawkins • Matthew D. Heines • Susan Hutchison, former chair of the Washington State Republican Party • John Orlinski • Tim Owen • RC Smith • Glen Stockwell • Keith Swank Withdrawn • Ron Higgins (withdrew May 19, 2018) Endorsements Independents Declared • Thor Amundson • Jon Butler • Jennifer "GiGi" Ferguson • Charlie R. Jackson • Dave Strider Write-in • Clay Johnson, activist • Mike Luke (Libertarian Party) • Alex Tsimerman (StandupAmerica) • Sam Wright (The Human Rights Party) Notes Results ==General election==

Debates Predictions Post-primary endorsements Polling Maria Cantwell vs. Rob McKenna Results By county Counties that flipped from Democratic to Republican • Cowlitz (largest city: Longview) • Grays Harbor (largest city: Aberdeen) • Klickitat (largest city: Goldendale) • Mason (largest city: Shelton) • Skamania (largest city: Carson) • Yakima (largest city: Yakima) • Wahkiakum (largest city: Puget Island) Counties that flipped from Republican to Democratic • Whitman (largest city: Pullman) By congressional district Cantwell won seven of ten congressional districts. ==Notes==