was a town located in Ōtsu District, Yamaguchi Prefecture, Japan.
As of 2003, the town had an estimated population of 6,302 and a density of 93.50 persons per km2. The total area was 67.40 km2.
On March 22, 2005, Misumi, along with the towns of Heki and Yuya (all from Ōtsu District), was merged into the expanded city of Nagato.[1]