2015 Portland, Maine, mayoral election

Portland, Maine, held an election for mayor on November 3, 2015. It was the second election since Portland voters approved a citywide referendum changing the city charter to recreate an elected mayor position in 2010.

The new citizen-elected mayor serves full-time in the position for a four-year term, exercises the powers and duties enumerated in Article II Section 5 of the Portland City Charter, be elected using instant-runoff voting, and, like the rest of municipal government in Portland, be officially non-partisan. Ethan Strimling defeated incumbent mayor Michael F. Brennan and fellow challenger Tom MacMillan.