Agasteeswaram taluk is a taluk located in Kanyakumari district, Tamil Nadu, India. The headquarters of the taluk is the town of Nagercoil. The taluk was among several in Thiruvananthapuram district that with the passage of the States Reorganisation Act of 1956 were transferred from Thiruvananthapuram district, Travancore-Cochin State to the newly created Kanyakumari district of Madras State (the latter later renamed as Tamil Nadu State).