Kuthalam (Tiruthuruthi (now known as Kuththalam) is a panchayat town in Nagapattinam district in the Indian state of Tamil Nadu. The language being spoken is Tamil.
As of the 2001 India census, Kuthalam had a population of 13,434. Males constitute 50% of the population and females 50%. Kuthalam has an average literacy rate of 73%, higher than the national average of 59.5%: male literacy is 82%, and female literacy is 64%. In Kuthalam, 11% of the population is under 6 years of age.