Mullaiyar River

 Mullaiyar  is a river flowing in the Tiruvarur district of the Indian state of Tamil Nadu. It is a tributary of the Kaveri river, and flows into the Bay of Bengal.

Course
The river is a tributary river of Kaveri and cuts into the Koraiyar River, then flows through Tiruvarur district and joins the sea Bay of Bengal near the city of Karaikal.