Kaiapoi is a town in the Waimakariri District of the Canterbury region, in the South Island of New Zealand. The town is located approximately 17 kilometres north of central Christchurch, close to the mouth of the Waimakariri River. It is considered a satellite town of Christchurch and is part of the Christchurch functional urban area.

Waimakariri District is a local government district, located in the Canterbury Region of New Zealand's South Island. It is named after the Waimakariri River, which forms the district's southern boundary, separating it from Christchurch City and the Selwyn District. It is bounded in the north by the Hurunui District and in the east by the Pacific Ocean.