Ōshima Subprefecture (大島支庁 Ōshima-shichō?) is a subprefecture of Tokyo Metropolis, Japan. The organization belong to Tokyo Metropolitan Government Bureau Of General Affairs.
It includes the following towns and villages on the Izu Islands:
It covers 141.82 square km and 13,825 people.
34°45′27″N 139°21′28″E / 34.757466°N 139.357639°ECoordinates: 34°45′27″N 139°21′28″E / 34.757466°N 139.357639°E