Mihara (三原町 Mihara-chō ) was a town located in Mihara District, Hyogo, Japan.
As of 2003, the town had an estimated population of 16,511 and a density of 282.96 persons per km². The total area was 58.35 km².
On January 11, 2005 Mihara was merged with the towns of Midori, Nandan and Seidan, all from Mihara District, to form the new city of Minamiawaji.