Nishigōshi (西合志町; -machi) was a town located in Kikuchi District, Kumamoto, Japan.
On February 27, 2006 Nishigōshi was merged with the town of Kōshi, also from Kikuchi District, to form the new city of Kōshi and no longer exists as an independent municipality.
As of 2003, the town had an estimated population of 28,479 and a density of 1,172.94 persons per km². The total area was 24.28 km².