Oshima (渡島総合振興局, Oshima-sōgō-shinkō-kyoku) is a subprefecture of Hokkaido Prefecture, Japan.

Hakodate Airport is located in the City of Hakodate.

The subprefecture is located on the Oshima Peninsula.

41°25′45″N 140°06′41″E / 41.429146°N 140.111361°E / 41.429146; 140.111361(Matsumae General Branch Office)

This Hokkaidō location article is a stub.