Kattappana Sree Dharma Shastha Temple is one of the most revered Ayyappa temples in Idukki district, located in the heart of Kattappana. Dedicated to Lord Ayyappa, worshipped here as Dharma Shastha – the divine guardian and protector of righteousness who guides devotees on the path of dharma.

Apart from the main diety, the temple also houses shrines for Lord Ganapathy, Murugan, Shiva, Devi, Vishnu, Bhadrakali, and the Nagas.

The annual festival, Uthram Thirunal Maholsavam, celebrated during February–March, is the main festival of the temple. During this auspicious time, the temple comes alive with vibrant celebrations, special poojas, cultural programs, and large gatherings of devotees.

Kattappana Sree Dharma Shastha Temple functions under the management and administration of SNDP Yogam.