Kasumi (香住町 Kasumi-chō) was a town located in Kinosaki District, Hyōgo, Japan.
As of 2003, the town had an estimated population of 13,519 and a density of 98.49 persons per km². The total area was 137.26 km².
On April 1, 2005, Kasumi, along with the towns of Mikata and Muraoka (both from Mikata District), was merged to create the town of Kami (in Mikata District), and no longer exists as an independent municipality. The portion of Kami that was Kasumi is now informally known as Kasumi-ku.
The popular visual novel and anime franchise Air was set in Kasumi.