Hanzan, Kagawa

 was a town located in Ayauta District, Kagawa Prefecture, Japan.
As of 2003, the town had an estimated population of 17,183 and a density of 857.86 persons per km². The total area was 20.03 km².
On March 22, 2005, Hanzan, along with the town of Ayauta (also from Ayauta District), was merged into the expanded city of Marugame and no longer exists as an independent municipality.