Mitsu (御津町 Mitsu-chō?) was a town located in Ibo District, Hyōgo Prefecture, Japan.
As of 2003, the town had an estimated population of 11,966 and a density of 665.89 persons per km². The total area was 17.97 km².
On October 1, 2005, Mitsu, along with the towns of Ibogawa and Shingū (all from Ibo District), was merged into the expanded city of Tatsuno.