Karthigai Deepam is a 1965 Indian Tamil-language romantic drama film, directed by A. Kasilingam and produced by P. Markendeyan and A. Kasilingam. The script was written by A. Kasilingam and the comedy parts were written by Shankar Jai Somu. The film stars S. A. Ashokan, C. Vasantha, K. Vijayan and Leelavathi. It was released on 30 April 1965.
Music was composed by R. Sudarsanam and lyrics were written by Alangudi Somu.
Kalki appreciated the performances of Ashokan and Leelavathi, though the critic felt Ashokan was occasionally overacting.