Vicki Susan Buck is a New Zealand politician. She was Mayor of Christchurch for nine years from 1989 to 1998. She retired after three terms, having been very popular. She made a political comeback, standing in the 2013 local elections in the Riccarton-Wigram ward as councillor for Christchurch City Council, being returned with the highest number of votes across all city wards. She subsequently accepted the role of deputy mayor.

The Mayor of Christchurch is the head of the municipal government of Christchurch, New Zealand, and presides over the Christchurch City Council. The mayor is directly elected using a First Past the Post electoral system. The current mayor, Phil Mauger, was elected in the 2022 mayoral election. The current deputy mayor is Pauline Cotter.