Ōshima

Ōshima, Oshima, Ooshima or Ohshima may refer to:

Places

Ōshima (大島, lit. "big island") (sorted by prefecture):
- Nii Ōshima Island, part of Niihama in Ehime Prefecture
- Ōshima, Ehime, an island connected by the Hakata-Ōshima Bridge and the Kurushima-Kaikyo Bridge
- Ōshima, Fukuoka, a former village in Munakata District, which became part of the city of Munakata, Fukuoka in 2005
- Amami Ōshima in Kagoshima Prefecture
- Ōshima District, Kagoshima
- Ōshima Subprefecture (Kagoshima)
- Ōshima, Nagasaki (Kitamatsuura), former village in Kitamatsura district
- Ōshima, Nagasaki (Nishisonogi), former town in Nishisonogi district
- Ōshima, Niigata
- Ōshima Subprefecture (Tokyo)
- Ōshima, Kesennuma (Miyagi), an island off Kesunnuma
- Izu Ōshima, one of the Izu Islands in Tokyo
- Ōshima, Toyama, has a volcano
- Kii Ōshima in Wakayama Prefecture
- Ōshima District, Yamaguchi, which includes:
  - Ōshima, Yamaguchi, a former town in Oshima District, Yamaguchi, now part of Suō-Ōshima, Yamaguchi
- Ōshima, Hokkaidō, an island in the Sea of Japan belonging to Matsumae, Hokkaidō
Oshima (渡島, Oshima):
- Oshima Subprefecture, a subprefecture of Hokkaidō
- Oshima Peninsula, the geographical area on which the subprefecture is located