Ōshima (大島村, Ōshima-mura) was a village located on Azuchi-Oshima Island in Kitamatsuura District, Nagasaki Prefecture, Japan.
On October 1, 2005, Ōshima, along with the towns of Ikitsuki and Tabira (all from Kitamatsuura District), was merged into the expanded city of Hirado.
In March 2011, the only high school on the island closed its doors after its last nine students graduated.
The building was transferred to the City of Hirado and turned into a community center.
Ōshima has a pachinko parlor, a snack tavern (karaoke), as well as two izakaya.