The 2018 Ottawa municipal election was a municipal election that was held on October 22, 2018, to elect the mayor of Ottawa, Ottawa City Council and the Ottawa-Carleton Public and Catholic School Boards. The election was held on the same day as elections in every other municipality in Ontario. The electoral system used is First past the post. Successful candidates do not need to have majority support of the voters in their district. Seven of the 23 successful ward councillors were elected with less than majority of votes in their districts.