Waihi is a town in Hauraki District in the North Island of New Zealand, especially notable for its history as a gold mine town. It had a population of 4,503 at the 2006 census.
The town is at the foot of the Coromandel Peninsula, close to the western end of the Bay of Plenty. The nearby resort town of Waihi Beach, ten kilometres to the east, is often regarded as the westernmost point of the Bay of Plenty region. To the west are the hills of the Kaimai Ranges. Road access from this direction is through the winding Karangahake Gorge road. Waihi has an unusually wet and damp microclimate for New Zealand's east coast with an average annual rainfall of 2147 mm.