Rangiora is the largest town and seat of the Waimakariri District, in Canterbury, New Zealand. It is 29 kilometres north of Christchurch, a…Rangiora is the largest town and seat of the Waimakariri District, in Canterbury, New Zealand. It is 29 kilometres north of Christchurch, and is part of the Christchurch metropolitan area. With an estimated population of 19,400, Rangiora is the 30th largest urban area in New Zealand, and the fifth-largest in the Canterbury region.