Ogi was a town located in Naoiri District, Ōita Prefecture, Japan.
As of 2003, the town had an estimated population of 3,454 and the density of 68.64 persons per km². The total area was 50.32 km².
On April 1, 2005, Ogi, along with the towns of Kujū and Naoiri, was merged into the expanded city of Taketa.