Since no mayoral candidate won a majority of votes on the first round, a runoff was held on 17 and 18 October 2021.

[1] The second round was won by the centre-left coalition candidate Stefano Lo Russo, member of the Democratic Party, who was officially inaugurated as the new mayor of Turin on 27 October 2021.

[2][3] The incumbent mayor of Turin, Chiara Appendino of the Five Star Movement, did not run for re-election.

[4] The voting system is used for all mayoral elections in Italy, in the cities with a population higher than 15,000 inhabitants.

[citation needed] The election of the City Council is based on a direct choice for the candidate with a maximum of two preferential votes, each for a different gender, belonging to the same party list: the candidate with the majority of the preferences is elected.