Engal Swamy Ayyappan is a 1990 Indian Tamil-language devotional film written and directed by Dasarathan. The film stars Dasarathan, Parthiban, Anand Babu, Dilip, and Hari Raj, while Malaysia Vasudevan, Nagesh, Sindhu, Suryakanth, Anju, and Madhuri play supporting roles. It was released on 28 December 1990.

Ayyappan, also known as Dharmasastha and Manikandan, is the Hindu deity of truth and righteousness. His worship is more prevalant in South India. Although devotion to Ayyappan has been prevalent earlier, his popularity rose in the late 20th century. According to Hindu theology, he is the son of Vishnu in the form of Mohini and Shiva thus representing a bridge between Shaivism and Vaishnavism.