Ayagawa (綾川町, Ayagawa-chō) is a town located in Ayauta District, Kagawa Prefecture, Japan.
The town was founded on March 21, 2006 from the merger of the towns of Ayakami and Ryōnan, both from Ayauta District.
As of September 2011, the town has an estimated population of 25,294. The total area is 109.67 km².
Ayagawa is well known within Kagawa prefecture for several notable udon noodle shops, as well as the Takinomiya Tenmangu Shrine. It has suffered a collapse of local businesses due to the construction of a large shopping complex. As a result, the former commercial areas are in a state of decay.
Public transport in Ayagawa is limited. There is a shuttle bus service which has stops in various locations around the city; however, the frequency of shuttles is limited to roughly 1 every hour. Ayagawa also contains several train stations along the Kotoden trainline that runs between Takamatsu and Kotohira.