Mairehau is a suburb of Christchurch, New Zealand. It is located four kilometres north of the city centre, close to the edge of the urbanised central city area. Much new development is being carried out on the northern edge of Mairehau. The suburb was named after Rose Mairehau Hutton, daughter of Arthur Rhodes, who in turn was Mayor of Christchurch in 1901–1902 and a major local property owner.