2018 Washington U.S. Senate Election

Washington · 2 candidates · See every 2018 U.S. Senate race

Who won the 2018 Washington U.S. Senate Election?

Maria Cantwell won the 2018 Washington U.S. Senate Election. Maria Cantwell received 1,803,364 popular votes (58.43%). The main challenger was Susan Hutchison (41.57%).

See the full head-to-head between Cantwell and Hutchison

Cantwell +16.9 pts · won by 520,560 votes

Maria Cantwell DemocraticWINNER58.43%

1,803,364 votes

Susan Hutchison Republican41.57%

1,282,804 votes

Popular-vote totals for U.S. Senate elections come from the MIT Election Data and Science Lab (1976–2024).

Data last verified July 28, 2026.