Minamiizu (南伊豆町, Minamiizu-chō) is a town located at the southern tip of Izu Peninsula in Kamo District, Shizuoka Prefecture, Japan.

The total area of the town is 110.58 square kilometres (42.70 sq mi) Minamiizu occupies the southern tip of Izu Peninsula, a hilly region with an indented ria coastline facing the Philippine Sea of the Pacific Ocean.

During the Edo period, all of Izu Province was tenryō territory under direct control of the Tokugawa shogunate, and the area now comprising Minamiizu Town consisted of 25 villages.

With the establishment of the modern municipalities system of the early Meiji period in 1889, the area was reorganized into six villages (Minamizaka, Minaminaka, Minamikami, Mizaka, Mihama and Chikuma) within Kamo District.

Tourism based on water sports and the hot spring industry, commercial fishing and farming are mainstays of the local economy.