Kayō (賀陽町 Kayō-chō) was a town located in Jōbō District, Okayama, Japan.
On October 1, 2004 Kayō was merged with the town of Kamogawa, from Mitsu District, to form the new town of Kibichūō.
As of 2003, the town had an estimated population of 8,188 and a density of 64.18 persons per km². The total area was 127.58 km².