Pandanadu is a village in Chengannur taluk in Alappuzha district, in Kerala, India. According to the 2001 Indian census, Pandanad has a population of 12,466 people.

The Pamba River is the longest river in the Indian state of Kerala after Periyar and Bharathappuzha, and the longest river in the erstwhile former princely state of Travancore. The Sabarimala Temple, dedicated to Lord Ayyappa, is located on the banks of the river Pamba.