2018 Massachusetts U.S. Senate Election

Massachusetts · 3 candidates · See every 2018 U.S. Senate race

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

Elizabeth Ann Warren won the 2018 Massachusetts U.S. Senate Election. Elizabeth Ann Warren received 1,633,371 popular votes (60.34%). The main challenger was Geoff Diehl (36.17%).

See the full head-to-head between Warren and Diehl

Warren +24.2 pts · won by 654,161 votes

Elizabeth Ann Warren DemocraticWINNER60.34%

1,633,371 votes

Geoff Diehl Republican36.17%

979,210 votes

Shiva AyyaduraiUnenrolled3.39%

91,710 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.