Osaka or Ōsaka may refer to:
- Osaka (大阪市, Ōsaka-shi), Japan's third largest city by population, the capital of Osaka Prefecture.
- Osaka Prefecture (大阪府, Ōsaka-fu), Japan's second smallest prefecture by area
- Osaka Plain (大阪平野, Ōsaka Heiya) in Japan, which includes parts of Osaka and Hyōgo Prefectures
Osaka may also refer to: