Sasthamangalam is a place in the city of Thiruvananthapuram (Trivandrum), Kerala, India. It is just 6 km from the Central Railway Station, and is a popular residential area in Thiruvananthapuram city. It is known for the Sasthamangalam Mahadevar (Shiva) Temple, one of the four major temples regularly visited by the Kings of Travancore, in the past. The place where the king used to park his chariot is now a road, called Rathapurakkunnu road.