Iwami (石見町 Iwami-chō) was a town located in Ōchi District, Shimane, Japan.
On October 1, 2004 Iwami was merged with the town of Mizuho, and the village of Hasumi, all from Ōchi District, to form the new town of Ōnan.
The name Iwami also refers to a region of Shimane Prefecture which makes up the South/West half of the prefecture.
Iwami Airport in Masuda is a 2 or 3 hour drive from Ōnan.
As of 2003, the town had an estimated population of 6,337 and a density of 46.13 persons per km². The total area was 137.36 km².