Charles Melville Louisson, known as Charles Louisson or Chas Louisson, was a New Zealand politician. Born in London, and relocated to Australia as a teenager, he worked in farming and on the gold fields. He moved to Christchurch to join his brother Alfred in business, which they conducted in transport, as merchants and farmers in various places in the South Island. Back in Christchurch, they were joined by their brother Cecil and bought a brewery, which under their stewardship became very successful.

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.