Nishiiyayama (西祖谷山村 Nishiiyayama-son) was a village located in Miyoshi District, Tokushima, Japan.
On March 1, 2006 Nishiiyayama was merged with the towns of Ikawa, Ikeda, Mino and Yamashiro, and the village of Higashiiyayama, all from Miyoshi District, to form the new city of Miyoshi.
As of 2003, the village had an estimated population of 1,840 and a density of 17.35 persons per km². The total area was 106.06 km².