Thiruvallur District is located at a distance of around 44 kilometers from Chennai on the Chennai-Tirupati Highway. The town of Thiruvallur is the district headquarters.
Thiruvallur District was originally called Tiru-evallur referring to the sleeping position of Lord Perumal in the Veeraragava Temple of Thiruvallur. Later it evolved to be known as Trivellore and Tiruvallur. It is bounded by Vellore district in the west, Bay of Bengal in the east, Chennai district in the southeast, state of Andhra Pradesh in the north and Kanchipuram in the south. In terms of Industrial Development, Thiruvallur district is one of the fastest developing districts in Tamil Nadu.