Ōshika (大鹿村, Ōshika-mura) is a village located in Nagano Prefecture, Japan.

The total area of the village is 248.28 square kilometres (95.86 sq mi).

The average annual rainfall is 1655 mm with September as the wettest month.

[3] Per Japanese census data,[4] the population of Ōshika has declined by more than 80 percent from its peak around 1950.

During the Edo period, the area was part of the tenryō territories administered directly by the Tokugawa shogunate.