Ōshima (大島郡; -gun) is a district located in Kagoshima, Japan.
As of 2003, the district has an estimated population of 87,681 and the density of 78.82 persons per km². The total area is 1,112.49 km².
Towns and villages Amagi China Isen Kasari Kikai Setochi Sumiyo Tatsugou Tokunoshima Uken Wadomari Yamato Yoron
