Tachibana (橘町 Tachibana-chō) is a town located in Ōshima District, Yamaguchi, Japan.
On October 1, 2004 Tachibana was merged with towns of Ōshima, Kuka and Tōwa, all from Ōshima District, to form the new town of Suō-Ōshima.
As of 2003, the town had an estimated population of 5,649 and a density of 195.81 persons per km². The total area was 28.85 km².