Thoothukudi District also known as Tuticorin District is a district of Tamil Nadu state in southern India. Thoothukudi (Tuticorin) is the district headquarters. It is also known for Pearl cultivation with abundance of pearls found in the seas of Thoothukudi. It is known as the gate way of Tamil Nadu. The total area of the district is 4621 sq km. According to the 2011 census Thoothukudi district has a population of 1,738,376.
It is bounded on the north by the districts of Tirunelveli, Virudhunagar, and Ramanathapuram, on the east and southeast by the Gulf of Mannar and on the west and southwest by Tirunelveli district. Thoothukudi (Tuticorin) is one of the major seaports in India with its history dating back to the 6th century A.D.
This district is divided into eight taluks namely Tuticorin, Thiruchendur, Sathankulam, Srivaikundam, Ottapidaram, Kovilpatti, Ettayapuram and Vilathikulam. The 12 revenue blocks of this district are Tuticorin, Thiruchendur, Udangudi, Sathankulam, Srivaikundam, Alwarthirunagari, Karunkulam, Ottapidaram, Kovilpatti, Kayathar, Vilathikulam and Pudur.