Ōshima Subprefecture (大島支庁 Ōshima-shichō?) is a subprefecture of Kagoshima Prefecture, Japan. The subprefectural office is located in Amami.
It includes the following municipalities on the Amami Islands:
28°22′32″N 129°29′38″E / 28.375539°N 129.494°ECoordinates: 28°22′32″N 129°29′38″E / 28.375539°N 129.494°E