Erattayar is a village in Udumbanchola taluk of Idukki district in the Indian state of Kerala.

[2] Erattayar town is located 2 km (1.2 mi) south to Erattayar dam, a diversion dam built to supply water to Idukki reservoir.

Erattayar village has an area of 32.37 km2 (12.50 sq mi) with 4,539 families residing in it.

Frequent private bus services are available to towns like Kattappana, Nedumkandam, Thankamani, Cheruthoni.

There is a small bus station in the town which is mostly visited and used by local people.