Iwagi (岩城村 Iwagi-mura) was a village located in Ochi District, Ehime, Japan.
On October 1, 2004 Iwagi was merged with the town of Yuge, and the villages of Ikina and Uoshima, all from Ochi District, to form the new town of Kamijima and no longer exists as an independent municipality.
As of 2003, the village had an estimated population of 2,214 and a density of 192.35 persons per km². The total area was 11.51 km².