The 2018 United States Senate election in Maine was held on November 6, 2018, alongside a gubernatorial election, U.S. House elections, and other state and local elections. Incumbent independent Senator Angus King won re-election to a second term, defeating Democratic nominee Zak Ringelstein and Republican nominee Eric Brakey. This was one of two independent-held Senate seats up for election in a state that Hillary Clinton won in the 2016 presidential election.