Yamashiro (山城町 Yamashiro-chō) was a town located in Miyoshi District, Tokushima, Japan.
On March 1, 2006 Yamashiro was merged with the towns of Ikawa, Ikeda and Mino, and the villages of Higashiiyayama and Nishiiyayama, all from Miyoshi District, to form the new city of Miyoshi.
As of 2003, the town had an estimated population of 5,220 and a density of 39.67 persons per km². The total area was 131.59 km².