Agaya Gangai (English: Ganges of sky) is a waterfall located in Kolli Hills of the Eastern Ghats, in Namakkal district, Tamil Nadu, India.

It falls from a height of 300 feet (91 m) and is formed by the Aiyaru river.

[1] Agaya Gangai is also known as Peraruvi and can be reached by climbing down 1196 steps.

The caves of sages Bogar, Agastyar, Korakkar and Kalangi Nathar are located near the waterfalls inside the forest.

This article related to a location in Namakkal district, Tamil Nadu, India is a stub.