Maranthalai is a village in Thoothukudi district in the state of Tamil Nadu, India. Authoor is the nearby panchayat town. Thamirabarani River rover flows through Maranthalai, thus serving the village with water.

School

• TDTA Isaac Duraisamy Nadar High School
• Little Angel School: Closure order issued by Directorate of Elementary Education, Tamil Nadu in 2015