Cuddalore, also spelt as Kadalur, is the city and headquarters of the Cuddalore District in the Indian state of Tamil Nadu. Situated south of Chennai, Cuddalore was an important city and port during the British Raj.

Neyveli is an industrial town in the Cuddalore district in the Indian state of Tamil Nadu. It is located 62 kilometres (39 mi) inland from the Bay of Bengal, west of Pondicherry and 197 kilometres (122 mi) south of Chennai. The town was developed in 1956 after the establishment of Neyveli Lignite Corporation, a public sector enterprise.