Ōoka, Nagano

Ōoka (大岡村, Ōoka-mura) was a village located in Sarashina District, Nagano Prefecture, Japan.

Location of Ōoka in Nagano Prefecture
former Ōoka village hall

As of 2003, the village had an estimated population of 1,467 and a density of 31.99 persons per km2. The total area was 45.86 km2.

On January 1, 2005, Ōoka, along with the town of Toyono, and the villages of Togakushi and Kinasa (all from Kamiminochi District), was merged into the expanded city of Nagano.