Kudiyirundha Koyil (transl. The Sacred Dwelling) is a 1968 Indian Tamil-language spy film directed by K. Shankar. The film stars M. G. Ramachandran, Jayalalithaa and Rajasree, with L. Vijayalakshmi, Pandari Bai, M. N. Nambiar, Sundarrajan, V. K. Ramasamy, S. V. Ramadas and Nagesh in supporting roles. A remake of the 1962 Hindi film China Town, it revolves around twins who become separated as children: one who grows up to be a criminal, and the other who is tasked with apprehending him.

Kudiyirundha Koyil was released on 15 March 1968. The film was a box office success, running for more than 100 days in theatres, and became a turning point in Ramachandran's career. For his performance, he won his first Tamil Nadu State Film Award for Best Actor.