Achahoish () is a village on the west coast of Knapdale in the Scottish council area of Argyll and Bute. In 1882, Wilson's The Gazetter of Scotland described Achahoish as a "...hamlet at the head of Loch Killisport. It has a post office...".
Achahoish recently benefited from the government's PPP funding and received a new primary school with two classrooms catering to the 20 local children from the small villages and hamlets in the area. The school opened in the summer of 2005.