Misumi, Yamaguchi

 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.