Ōchi (相知町 Ōchi-chō) was a town located in Higashimatsuura District, Saga, Japan.
On January 1, 2005 Ōchi, along with the towns of Chinzei, Hamatama, Hizen, Kyūragi and Yobuko, and the village of Kitahata, all from Higashimatsuura District, was merged into the expanded city of Karatsu.
As of 2003, the town had an estimated population of 8,890 and a density of 136.60 persons per km². The total area was 65.08 km².
See also the Japanese pages: Ōuchi, Saga, (相知町), and a map,