Mihama is a town located in Hidaka District, Wakayama Prefecture, Japan. As of 30 November 2021, the town had an estimated population of 6,761 in 3083 households and a population density of 530 persons per km². The total area of the town is 12.77 square kilometres (4.93 sq mi).

Wakayama Prefecture is a prefecture of Japan located in the Kansai region of Honshu. Wakayama Prefecture has a population of 944,320 and has a geographic area of 4,724 square kilometres (1,824 sq mi). Wakayama Prefecture borders Osaka Prefecture to the north, and Mie Prefecture and Nara Prefecture to the northeast.