Waitomo District is a territorial authority, located in the Waikato region, at the north of the King Country area in the North Island of New Zealand. A small part of the district, the locality of Tiroa, however, lies in the Manawatū-Whanganui region.

Waikato is a region of the upper North Island of New Zealand. It covers the Waikato District, Waipa District, Matamata-Piako District, South Waikato District and Hamilton City, as well as Hauraki, Coromandel Peninsula, the northern King Country, much of the Taupō District, and parts of the Rotorua Lakes District. It is governed by the Waikato Regional Council.