Susami is a town in Nishimuro District, Wakayama Prefecture, Japan. As of 31 October 2021, the town had an estimated population of 3,709 in 2041 households and a population density of 21 persons per km2. The total area of the town is 174.45 square kilometres (67.36 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.