Rotorua (from Māori: Te Rotorua-nui-a-Kahumatamomoe, "The second great lake of Kahumatamomoe") is a city on the southern shores of the lake of the same name, in the Bay of Plenty region of the North Island of New Zealand. The city is the seat of the Rotorua District, a territorial authority encompassing the city and several other nearby towns. Rotorua city has an estimated permanent population of 56,200, with the Rotorua district having a total estimated population of 68,900. The city is in the heart of the North Island, just 60 kilometres (37 mi) south of Tauranga, 80 kilometres (50 mi) north of Taupo, 105 kilometres (65 mi) east of Hamilton, and 230 kilometres (140 mi) southeast of the nation's most populous city, Auckland.

Rotorua is a major destination for both domestic and international tourists; the tourism industry is by far the largest industry in the district. The city is known for its geothermal activity, and features geysers – notably the Pohutu Geyser at Whakarewarewa – and hot mud pools. This thermal activity is sourced to the Rotorua caldera, on which the city lies. Rotorua is home to the Waiariki Institute of Technology.